intel_sdvo.c

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/*
 * Copyright 2006 Dave Airlie <[email protected]>
 * Copyright © 2006-2007 Intel Corporation
 *   Jesse Barnes <[email protected]>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *  Eric Anholt <[email protected]>
 */
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include "intel_drv.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include "intel_sdvo_regs.h"

#define SDVO_TMDS_MASK (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1)
#define SDVO_RGB_MASK  (SDVO_OUTPUT_RGB0 | SDVO_OUTPUT_RGB1)
#define SDVO_LVDS_MASK (SDVO_OUTPUT_LVDS0 | SDVO_OUTPUT_LVDS1)
#define SDVO_TV_MASK   (SDVO_OUTPUT_CVBS0 | SDVO_OUTPUT_SVID0 | SDVO_OUTPUT_YPRPB0)

#define SDVO_OUTPUT_MASK (SDVO_TMDS_MASK | SDVO_RGB_MASK | SDVO_LVDS_MASK |\
            SDVO_TV_MASK)

#define IS_TV(c)    (c->output_flag & SDVO_TV_MASK)
#define IS_TMDS(c)  (c->output_flag & SDVO_TMDS_MASK)
#define IS_LVDS(c)  (c->output_flag & SDVO_LVDS_MASK)
#define IS_TV_OR_LVDS(c) (c->output_flag & (SDVO_TV_MASK | SDVO_LVDS_MASK))
#define IS_DIGITAL(c) (c->output_flag & (SDVO_TMDS_MASK | SDVO_LVDS_MASK))


static const char *tv_format_names[] = {
    "NTSC_M"   , "NTSC_J"  , "NTSC_443",
    "PAL_B"    , "PAL_D"   , "PAL_G"   ,
    "PAL_H"    , "PAL_I"   , "PAL_M"   ,
    "PAL_N"    , "PAL_NC"  , "PAL_60"  ,
    "SECAM_B"  , "SECAM_D" , "SECAM_G" ,
    "SECAM_K"  , "SECAM_K1", "SECAM_L" ,
    "SECAM_60"
};

#define TV_FORMAT_NUM  (sizeof(tv_format_names) / sizeof(*tv_format_names))

struct intel_sdvo {
    struct intel_encoder base;

    struct i2c_adapter *i2c;
    u8 slave_addr;

    struct i2c_adapter ddc;

    /* Register for the SDVO device: SDVOB or SDVOC */
    uint32_t sdvo_reg;

    /* Active outputs controlled by this SDVO output */
    uint16_t controlled_output;

    /*
     * Capabilities of the SDVO device returned by
     * i830_sdvo_get_capabilities()
     */
    struct intel_sdvo_caps caps;

    /* Pixel clock limitations reported by the SDVO device, in kHz */
    int pixel_clock_min, pixel_clock_max;

    /*
    * For multiple function SDVO device,
    * this is for current attached outputs.
    */
    uint16_t attached_output;

    /*
     * Hotplug activation bits for this device
     */
    uint16_t hotplug_active;

    uint32_t color_range;

    bool is_tv;

    /* On different gens SDVOB is at different places. */
    bool is_sdvob;

    /* This is for current tv format name */
    int tv_format_index;

    bool is_hdmi;
    bool has_hdmi_monitor;
    bool has_hdmi_audio;

    bool is_lvds;

    struct drm_display_mode *sdvo_lvds_fixed_mode;

    /* DDC bus used by this SDVO encoder */
    uint8_t ddc_bus;

    /*
     * the sdvo flag gets lost in round trip: dtd->adjusted_mode->dtd
     */
    uint8_t dtd_sdvo_flags;
};

struct intel_sdvo_connector {
    struct intel_connector base;

    /* Mark the type of connector */
    uint16_t output_flag;

    enum hdmi_force_audio force_audio;

    /* This contains all current supported TV format */
    u8 tv_format_supported[TV_FORMAT_NUM];
    int   format_supported_num;
    struct drm_property *tv_format;

    /* add the property for the SDVO-TV */
    struct drm_property *left;
    struct drm_property *right;
    struct drm_property *top;
    struct drm_property *bottom;
    struct drm_property *hpos;
    struct drm_property *vpos;
    struct drm_property *contrast;
    struct drm_property *saturation;
    struct drm_property *hue;
    struct drm_property *sharpness;
    struct drm_property *flicker_filter;
    struct drm_property *flicker_filter_adaptive;
    struct drm_property *flicker_filter_2d;
    struct drm_property *tv_chroma_filter;
    struct drm_property *tv_luma_filter;
    struct drm_property *dot_crawl;

    /* add the property for the SDVO-TV/LVDS */
    struct drm_property *brightness;

    /* Add variable to record current setting for the above property */
    u32 left_margin, right_margin, top_margin, bottom_margin;

    /* this is to get the range of margin.*/
    u32 max_hscan,  max_vscan;
    u32 max_hpos, cur_hpos;
    u32 max_vpos, cur_vpos;
    u32 cur_brightness, max_brightness;
    u32 cur_contrast,   max_contrast;
    u32 cur_saturation, max_saturation;
    u32 cur_hue,    max_hue;
    u32 cur_sharpness,  max_sharpness;
    u32 cur_flicker_filter,     max_flicker_filter;
    u32 cur_flicker_filter_adaptive,    max_flicker_filter_adaptive;
    u32 cur_flicker_filter_2d,      max_flicker_filter_2d;
    u32 cur_tv_chroma_filter,   max_tv_chroma_filter;
    u32 cur_tv_luma_filter, max_tv_luma_filter;
    u32 cur_dot_crawl,  max_dot_crawl;
};

static struct intel_sdvo *to_intel_sdvo(struct drm_encoder *encoder)
{
    return container_of(encoder, struct intel_sdvo, base.base);
}

static struct intel_sdvo *intel_attached_sdvo(struct drm_connector *connector)
{
    return container_of(intel_attached_encoder(connector),
                struct intel_sdvo, base);
}

static struct intel_sdvo_connector *to_intel_sdvo_connector(struct drm_connector *connector)
{
    return container_of(to_intel_connector(connector), struct intel_sdvo_connector, base);
}

static bool
intel_sdvo_output_setup(struct intel_sdvo *intel_sdvo, uint16_t flags);
static bool
intel_sdvo_tv_create_property(struct intel_sdvo *intel_sdvo,
                  struct intel_sdvo_connector *intel_sdvo_connector,
                  int type);
static bool
intel_sdvo_create_enhance_property(struct intel_sdvo *intel_sdvo,
                   struct intel_sdvo_connector *intel_sdvo_connector);

static void intel_sdvo_write_sdvox(struct intel_sdvo *intel_sdvo, u32 val)
{
    struct drm_device *dev = intel_sdvo->base.base.dev;
    struct drm_i915_private *dev_priv = dev->dev_private;
    u32 bval = val, cval = val;
    int i;

    if (intel_sdvo->sdvo_reg == PCH_SDVOB) {
        I915_WRITE(intel_sdvo->sdvo_reg, val);
        I915_READ(intel_sdvo->sdvo_reg);
        return;
    }

    if (intel_sdvo->sdvo_reg == SDVOB) {
        cval = I915_READ(SDVOC);
    } else {
        bval = I915_READ(SDVOB);
    }
    /*
     * Write the registers twice for luck. Sometimes,
     * writing them only once doesn't appear to 'stick'.
     * The BIOS does this too. Yay, magic
     */
    for (i = 0; i < 2; i++)
    {
        I915_WRITE(SDVOB, bval);
        I915_READ(SDVOB);
        I915_WRITE(SDVOC, cval);
        I915_READ(SDVOC);
    }
}

static bool intel_sdvo_read_byte(struct intel_sdvo *intel_sdvo, u8 addr, u8 *ch)
{
    struct i2c_msg msgs[] = {
        {
            .addr = intel_sdvo->slave_addr,
            .flags = 0,
            .len = 1,
            .buf = &addr,
        },
        {
            .addr = intel_sdvo->slave_addr,
            .flags = I2C_M_RD,
            .len = 1,
            .buf = ch,
        }
    };
    int ret;

    if ((ret = i2c_transfer(intel_sdvo->i2c, msgs, 2)) == 2)
        return true;

    DRM_DEBUG_KMS("i2c transfer returned %d\n", ret);
    return false;
}

#define SDVO_CMD_NAME_ENTRY(cmd) {cmd, #cmd}

static const struct _sdvo_cmd_name {
    u8 cmd;
    const char *name;
} sdvo_cmd_names[] = {
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_RESET),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_DEVICE_CAPS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_FIRMWARE_REV),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_TRAINED_INPUTS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_ACTIVE_OUTPUTS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_ACTIVE_OUTPUTS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_IN_OUT_MAP),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_IN_OUT_MAP),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_ATTACHED_DISPLAYS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HOT_PLUG_SUPPORT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_ACTIVE_HOT_PLUG),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_ACTIVE_HOT_PLUG),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_INTERRUPT_EVENT_SOURCE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_TARGET_INPUT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_TARGET_OUTPUT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_INPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_INPUT_TIMINGS_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_INPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_INPUT_TIMINGS_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_INPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_OUTPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_OUTPUT_TIMINGS_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_OUTPUT_TIMINGS_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_OUTPUT_TIMINGS_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_CREATE_PREFERRED_INPUT_TIMING),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART1),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART2),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_INPUT_PIXEL_CLOCK_RANGE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_OUTPUT_PIXEL_CLOCK_RANGE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPPORTED_CLOCK_RATE_MULTS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_CLOCK_RATE_MULT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_CLOCK_RATE_MULT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPPORTED_TV_FORMATS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_TV_FORMAT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_TV_FORMAT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPPORTED_POWER_STATES),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_POWER_STATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_ENCODER_POWER_STATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_DISPLAY_POWER_STATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_CONTROL_BUS_SWITCH),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SDTV_RESOLUTION_SUPPORT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SCALED_HDTV_RESOLUTION_SUPPORT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPPORTED_ENHANCEMENTS),

    /* Add the op code for SDVO enhancements */
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_HPOS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HPOS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HPOS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_VPOS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_VPOS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_VPOS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_SATURATION),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SATURATION),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_SATURATION),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_HUE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HUE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HUE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_CONTRAST),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_CONTRAST),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_CONTRAST),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_BRIGHTNESS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_BRIGHTNESS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_BRIGHTNESS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_OVERSCAN_H),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_OVERSCAN_H),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_OVERSCAN_H),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_OVERSCAN_V),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_OVERSCAN_V),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_OVERSCAN_V),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_FLICKER_FILTER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_FLICKER_FILTER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_FLICKER_FILTER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_FLICKER_FILTER_ADAPTIVE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_FLICKER_FILTER_ADAPTIVE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_FLICKER_FILTER_ADAPTIVE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_FLICKER_FILTER_2D),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_FLICKER_FILTER_2D),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_FLICKER_FILTER_2D),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_SHARPNESS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SHARPNESS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_SHARPNESS),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_DOT_CRAWL),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_DOT_CRAWL),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_TV_CHROMA_FILTER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_TV_CHROMA_FILTER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_TV_CHROMA_FILTER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_MAX_TV_LUMA_FILTER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_TV_LUMA_FILTER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_TV_LUMA_FILTER),

    /* HDMI op code */
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_SUPP_ENCODE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_ENCODE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_ENCODE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_PIXEL_REPLI),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_PIXEL_REPLI),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_COLORIMETRY_CAP),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_COLORIMETRY),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_COLORIMETRY),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_AUDIO_ENCRYPT_PREFER),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_AUDIO_STAT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_AUDIO_STAT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_INDEX),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HBUF_INDEX),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_INFO),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_AV_SPLIT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HBUF_AV_SPLIT),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_TXRATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HBUF_TXRATE),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_SET_HBUF_DATA),
    SDVO_CMD_NAME_ENTRY(SDVO_CMD_GET_HBUF_DATA),
};

#define SDVO_NAME(svdo) ((svdo)->is_sdvob ? "SDVOB" : "SDVOC")

static void intel_sdvo_debug_write(struct intel_sdvo *intel_sdvo, u8 cmd,
                   const void *args, int args_len)
{
    int i;

    DRM_DEBUG_KMS("%s: W: %02X ",
                SDVO_NAME(intel_sdvo), cmd);
    for (i = 0; i < args_len; i++)
        DRM_LOG_KMS("%02X ", ((u8 *)args)[i]);
    for (; i < 8; i++)
        DRM_LOG_KMS("   ");
    for (i = 0; i < ARRAY_SIZE(sdvo_cmd_names); i++) {
        if (cmd == sdvo_cmd_names[i].cmd) {
            DRM_LOG_KMS("(%s)", sdvo_cmd_names[i].name);
            break;
        }
    }
    if (i == ARRAY_SIZE(sdvo_cmd_names))
        DRM_LOG_KMS("(%02X)", cmd);
    DRM_LOG_KMS("\n");
}

static const char *cmd_status_names[] = {
    "Power on",
    "Success",
    "Not supported",
    "Invalid arg",
    "Pending",
    "Target not specified",
    "Scaling not supported"
};

static bool intel_sdvo_write_cmd(struct intel_sdvo *intel_sdvo, u8 cmd,
                 const void *args, int args_len)
{
    u8 *buf, status;
    struct i2c_msg *msgs;
    int i, ret = true;

        /* Would be simpler to allocate both in one go ? */        
    buf = (u8 *)kzalloc(args_len * 2 + 2, GFP_KERNEL);
    if (!buf)
        return false;

    msgs = kcalloc(args_len + 3, sizeof(*msgs), GFP_KERNEL);
    if (!msgs) {
            kfree(buf);
        return false;
        }

    intel_sdvo_debug_write(intel_sdvo, cmd, args, args_len);

    for (i = 0; i < args_len; i++) {
        msgs[i].addr = intel_sdvo->slave_addr;
        msgs[i].flags = 0;
        msgs[i].len = 2;
        msgs[i].buf = buf + 2 *i;
        buf[2*i + 0] = SDVO_I2C_ARG_0 - i;
        buf[2*i + 1] = ((u8*)args)[i];
    }
    msgs[i].addr = intel_sdvo->slave_addr;
    msgs[i].flags = 0;
    msgs[i].len = 2;
    msgs[i].buf = buf + 2*i;
    buf[2*i + 0] = SDVO_I2C_OPCODE;
    buf[2*i + 1] = cmd;

    /* the following two are to read the response */
    status = SDVO_I2C_CMD_STATUS;
    msgs[i+1].addr = intel_sdvo->slave_addr;
    msgs[i+1].flags = 0;
    msgs[i+1].len = 1;
    msgs[i+1].buf = &status;

    msgs[i+2].addr = intel_sdvo->slave_addr;
    msgs[i+2].flags = I2C_M_RD;
    msgs[i+2].len = 1;
    msgs[i+2].buf = &status;

    ret = i2c_transfer(intel_sdvo->i2c, msgs, i+3);
    if (ret < 0) {
        DRM_DEBUG_KMS("I2c transfer returned %d\n", ret);
        ret = false;
        goto out;
    }
    if (ret != i+3) {
        /* failure in I2C transfer */
        DRM_DEBUG_KMS("I2c transfer returned %d/%d\n", ret, i+3);
        ret = false;
    }

out:
    kfree(msgs);
    kfree(buf);
    return ret;
}

static bool intel_sdvo_read_response(struct intel_sdvo *intel_sdvo,
                     void *response, int response_len)
{
    u8 retry = 5;
    u8 status;
    int i;

    DRM_DEBUG_KMS("%s: R: ", SDVO_NAME(intel_sdvo));

    /*
     * The documentation states that all commands will be
     * processed within 15µs, and that we need only poll
     * the status byte a maximum of 3 times in order for the
     * command to be complete.
     *
     * Check 5 times in case the hardware failed to read the docs.
     */
    if (!intel_sdvo_read_byte(intel_sdvo,
                  SDVO_I2C_CMD_STATUS,
                  &status))
        goto log_fail;

    while (status == SDVO_CMD_STATUS_PENDING && retry--) {
        udelay(15);
        if (!intel_sdvo_read_byte(intel_sdvo,
                      SDVO_I2C_CMD_STATUS,
                      &status))
            goto log_fail;
    }

    if (status <= SDVO_CMD_STATUS_SCALING_NOT_SUPP)
        DRM_LOG_KMS("(%s)", cmd_status_names[status]);
    else
        DRM_LOG_KMS("(??? %d)", status);

    if (status != SDVO_CMD_STATUS_SUCCESS)
        goto log_fail;

    /* Read the command response */
    for (i = 0; i < response_len; i++) {
        if (!intel_sdvo_read_byte(intel_sdvo,
                      SDVO_I2C_RETURN_0 + i,
                      &((u8 *)response)[i]))
            goto log_fail;
        DRM_LOG_KMS(" %02X", ((u8 *)response)[i]);
    }
    DRM_LOG_KMS("\n");
    return true;

log_fail:
    DRM_LOG_KMS("... failed\n");
    return false;
}

static int intel_sdvo_get_pixel_multiplier(struct drm_display_mode *mode)
{
    if (mode->clock >= 100000)
        return 1;
    else if (mode->clock >= 50000)
        return 2;
    else
        return 4;
}

static bool intel_sdvo_set_control_bus_switch(struct intel_sdvo *intel_sdvo,
                          u8 ddc_bus)
{
    /* This must be the immediately preceding write before the i2c xfer */
    return intel_sdvo_write_cmd(intel_sdvo,
                    SDVO_CMD_SET_CONTROL_BUS_SWITCH,
                    &ddc_bus, 1);
}

static bool intel_sdvo_set_value(struct intel_sdvo *intel_sdvo, u8 cmd, const void *data, int len)
{
    if (!intel_sdvo_write_cmd(intel_sdvo, cmd, data, len))
        return false;

    return intel_sdvo_read_response(intel_sdvo, NULL, 0);
}

static bool
intel_sdvo_get_value(struct intel_sdvo *intel_sdvo, u8 cmd, void *value, int len)
{
    if (!intel_sdvo_write_cmd(intel_sdvo, cmd, NULL, 0))
        return false;

    return intel_sdvo_read_response(intel_sdvo, value, len);
}

static bool intel_sdvo_set_target_input(struct intel_sdvo *intel_sdvo)
{
    struct intel_sdvo_set_target_input_args targets = {0};
    return intel_sdvo_set_value(intel_sdvo,
                    SDVO_CMD_SET_TARGET_INPUT,
                    &targets, sizeof(targets));
}

static bool intel_sdvo_get_trained_inputs(struct intel_sdvo *intel_sdvo, bool *input_1, bool *input_2)
{
    struct intel_sdvo_get_trained_inputs_response response;

    BUILD_BUG_ON(sizeof(response) != 1);
    if (!intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_TRAINED_INPUTS,
                  &response, sizeof(response)))
        return false;

    *input_1 = response.input0_trained;
    *input_2 = response.input1_trained;
    return true;
}

static bool intel_sdvo_set_active_outputs(struct intel_sdvo *intel_sdvo,
                      u16 outputs)
{
    return intel_sdvo_set_value(intel_sdvo,
                    SDVO_CMD_SET_ACTIVE_OUTPUTS,
                    &outputs, sizeof(outputs));
}

static bool intel_sdvo_get_active_outputs(struct intel_sdvo *intel_sdvo,
                      u16 *outputs)
{
    return intel_sdvo_get_value(intel_sdvo,
                    SDVO_CMD_GET_ACTIVE_OUTPUTS,
                    outputs, sizeof(*outputs));
}

static bool intel_sdvo_set_encoder_power_state(struct intel_sdvo *intel_sdvo,
                           int mode)
{
    u8 state = SDVO_ENCODER_STATE_ON;

    switch (mode) {
    case DRM_MODE_DPMS_ON:
        state = SDVO_ENCODER_STATE_ON;
        break;
    case DRM_MODE_DPMS_STANDBY:
        state = SDVO_ENCODER_STATE_STANDBY;
        break;
    case DRM_MODE_DPMS_SUSPEND:
        state = SDVO_ENCODER_STATE_SUSPEND;
        break;
    case DRM_MODE_DPMS_OFF:
        state = SDVO_ENCODER_STATE_OFF;
        break;
    }

    return intel_sdvo_set_value(intel_sdvo,
                    SDVO_CMD_SET_ENCODER_POWER_STATE, &state, sizeof(state));
}

static bool intel_sdvo_get_input_pixel_clock_range(struct intel_sdvo *intel_sdvo,
                           int *clock_min,
                           int *clock_max)
{
    struct intel_sdvo_pixel_clock_range clocks;

    BUILD_BUG_ON(sizeof(clocks) != 4);
    if (!intel_sdvo_get_value(intel_sdvo,
                  SDVO_CMD_GET_INPUT_PIXEL_CLOCK_RANGE,
                  &clocks, sizeof(clocks)))
        return false;

    /* Convert the values from units of 10 kHz to kHz. */
    *clock_min = clocks.min * 10;
    *clock_max = clocks.max * 10;
    return true;
}

static bool intel_sdvo_set_target_output(struct intel_sdvo *intel_sdvo,
                     u16 outputs)
{
    return intel_sdvo_set_value(intel_sdvo,
                    SDVO_CMD_SET_TARGET_OUTPUT,
                    &outputs, sizeof(outputs));
}

static bool intel_sdvo_set_timing(struct intel_sdvo *intel_sdvo, u8 cmd,
                  struct intel_sdvo_dtd *dtd)
{
    return intel_sdvo_set_value(intel_sdvo, cmd, &dtd->part1, sizeof(dtd->part1)) &&
        intel_sdvo_set_value(intel_sdvo, cmd + 1, &dtd->part2, sizeof(dtd->part2));
}

static bool intel_sdvo_set_input_timing(struct intel_sdvo *intel_sdvo,
                     struct intel_sdvo_dtd *dtd)
{
    return intel_sdvo_set_timing(intel_sdvo,
                     SDVO_CMD_SET_INPUT_TIMINGS_PART1, dtd);
}

static bool intel_sdvo_set_output_timing(struct intel_sdvo *intel_sdvo,
                     struct intel_sdvo_dtd *dtd)
{
    return intel_sdvo_set_timing(intel_sdvo,
                     SDVO_CMD_SET_OUTPUT_TIMINGS_PART1, dtd);
}

static bool
intel_sdvo_create_preferred_input_timing(struct intel_sdvo *intel_sdvo,
                     uint16_t clock,
                     uint16_t width,
                     uint16_t height)
{
    struct intel_sdvo_preferred_input_timing_args args;

    memset(&args, 0, sizeof(args));
    args.clock = clock;
    args.width = width;
    args.height = height;
    args.interlace = 0;

    if (intel_sdvo->is_lvds &&
       (intel_sdvo->sdvo_lvds_fixed_mode->hdisplay != width ||
        intel_sdvo->sdvo_lvds_fixed_mode->vdisplay != height))
        args.scaled = 1;

    return intel_sdvo_set_value(intel_sdvo,
                    SDVO_CMD_CREATE_PREFERRED_INPUT_TIMING,
                    &args, sizeof(args));
}

static bool intel_sdvo_get_preferred_input_timing(struct intel_sdvo *intel_sdvo,
                          struct intel_sdvo_dtd *dtd)
{
    BUILD_BUG_ON(sizeof(dtd->part1) != 8);
    BUILD_BUG_ON(sizeof(dtd->part2) != 8);
    return intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART1,
                    &dtd->part1, sizeof(dtd->part1)) &&
        intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_PREFERRED_INPUT_TIMING_PART2,
                     &dtd->part2, sizeof(dtd->part2));
}

static bool intel_sdvo_set_clock_rate_mult(struct intel_sdvo *intel_sdvo, u8 val)
{
    return intel_sdvo_set_value(intel_sdvo, SDVO_CMD_SET_CLOCK_RATE_MULT, &val, 1);
}

static void intel_sdvo_get_dtd_from_mode(struct intel_sdvo_dtd *dtd,
                     const struct drm_display_mode *mode)
{
    uint16_t width, height;
    uint16_t h_blank_len, h_sync_len, v_blank_len, v_sync_len;
    uint16_t h_sync_offset, v_sync_offset;
    int mode_clock;

    width = mode->hdisplay;
    height = mode->vdisplay;

    /* do some mode translations */
    h_blank_len = mode->htotal - mode->hdisplay;
    h_sync_len = mode->hsync_end - mode->hsync_start;

    v_blank_len = mode->vtotal - mode->vdisplay;
    v_sync_len = mode->vsync_end - mode->vsync_start;

    h_sync_offset = mode->hsync_start - mode->hdisplay;
    v_sync_offset = mode->vsync_start - mode->vdisplay;

    mode_clock = mode->clock;
    mode_clock /= intel_mode_get_pixel_multiplier(mode) ?: 1;
    mode_clock /= 10;
    dtd->part1.clock = mode_clock;

    dtd->part1.h_active = width & 0xff;
    dtd->part1.h_blank = h_blank_len & 0xff;
    dtd->part1.h_high = (((width >> 8) & 0xf) << 4) |
        ((h_blank_len >> 8) & 0xf);
    dtd->part1.v_active = height & 0xff;
    dtd->part1.v_blank = v_blank_len & 0xff;
    dtd->part1.v_high = (((height >> 8) & 0xf) << 4) |
        ((v_blank_len >> 8) & 0xf);

    dtd->part2.h_sync_off = h_sync_offset & 0xff;
    dtd->part2.h_sync_width = h_sync_len & 0xff;
    dtd->part2.v_sync_off_width = (v_sync_offset & 0xf) << 4 |
        (v_sync_len & 0xf);
    dtd->part2.sync_off_width_high = ((h_sync_offset & 0x300) >> 2) |
        ((h_sync_len & 0x300) >> 4) | ((v_sync_offset & 0x30) >> 2) |
        ((v_sync_len & 0x30) >> 4);

    dtd->part2.dtd_flags = 0x18;
    if (mode->flags & DRM_MODE_FLAG_INTERLACE)
        dtd->part2.dtd_flags |= DTD_FLAG_INTERLACE;
    if (mode->flags & DRM_MODE_FLAG_PHSYNC)
        dtd->part2.dtd_flags |= DTD_FLAG_HSYNC_POSITIVE;
    if (mode->flags & DRM_MODE_FLAG_PVSYNC)
        dtd->part2.dtd_flags |= DTD_FLAG_VSYNC_POSITIVE;

    dtd->part2.sdvo_flags = 0;
    dtd->part2.v_sync_off_high = v_sync_offset & 0xc0;
    dtd->part2.reserved = 0;
}

static void intel_sdvo_get_mode_from_dtd(struct drm_display_mode * mode,
                     const struct intel_sdvo_dtd *dtd)
{
    mode->hdisplay = dtd->part1.h_active;
    mode->hdisplay += ((dtd->part1.h_high >> 4) & 0x0f) << 8;
    mode->hsync_start = mode->hdisplay + dtd->part2.h_sync_off;
    mode->hsync_start += (dtd->part2.sync_off_width_high & 0xc0) << 2;
    mode->hsync_end = mode->hsync_start + dtd->part2.h_sync_width;
    mode->hsync_end += (dtd->part2.sync_off_width_high & 0x30) << 4;
    mode->htotal = mode->hdisplay + dtd->part1.h_blank;
    mode->htotal += (dtd->part1.h_high & 0xf) << 8;

    mode->vdisplay = dtd->part1.v_active;
    mode->vdisplay += ((dtd->part1.v_high >> 4) & 0x0f) << 8;
    mode->vsync_start = mode->vdisplay;
    mode->vsync_start += (dtd->part2.v_sync_off_width >> 4) & 0xf;
    mode->vsync_start += (dtd->part2.sync_off_width_high & 0x0c) << 2;
    mode->vsync_start += dtd->part2.v_sync_off_high & 0xc0;
    mode->vsync_end = mode->vsync_start +
        (dtd->part2.v_sync_off_width & 0xf);
    mode->vsync_end += (dtd->part2.sync_off_width_high & 0x3) << 4;
    mode->vtotal = mode->vdisplay + dtd->part1.v_blank;
    mode->vtotal += (dtd->part1.v_high & 0xf) << 8;

    mode->clock = dtd->part1.clock * 10;

    mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
    if (dtd->part2.dtd_flags & DTD_FLAG_INTERLACE)
        mode->flags |= DRM_MODE_FLAG_INTERLACE;
    if (dtd->part2.dtd_flags & DTD_FLAG_HSYNC_POSITIVE)
        mode->flags |= DRM_MODE_FLAG_PHSYNC;
    if (dtd->part2.dtd_flags & DTD_FLAG_VSYNC_POSITIVE)
        mode->flags |= DRM_MODE_FLAG_PVSYNC;
}

static bool intel_sdvo_check_supp_encode(struct intel_sdvo *intel_sdvo)
{
    struct intel_sdvo_encode encode;

    BUILD_BUG_ON(sizeof(encode) != 2);
    return intel_sdvo_get_value(intel_sdvo,
                  SDVO_CMD_GET_SUPP_ENCODE,
                  &encode, sizeof(encode));
}

static bool intel_sdvo_set_encode(struct intel_sdvo *intel_sdvo,
                  uint8_t mode)
{
    return intel_sdvo_set_value(intel_sdvo, SDVO_CMD_SET_ENCODE, &mode, 1);
}

static bool intel_sdvo_set_colorimetry(struct intel_sdvo *intel_sdvo,
                       uint8_t mode)
{
    return intel_sdvo_set_value(intel_sdvo, SDVO_CMD_SET_COLORIMETRY, &mode, 1);
}

#if 0
static void intel_sdvo_dump_hdmi_buf(struct intel_sdvo *intel_sdvo)
{
    int i, j;
    uint8_t set_buf_index[2];
    uint8_t av_split;
    uint8_t buf_size;
    uint8_t buf[48];
    uint8_t *pos;

    intel_sdvo_get_value(encoder, SDVO_CMD_GET_HBUF_AV_SPLIT, &av_split, 1);

    for (i = 0; i <= av_split; i++) {
        set_buf_index[0] = i; set_buf_index[1] = 0;
        intel_sdvo_write_cmd(encoder, SDVO_CMD_SET_HBUF_INDEX,
                     set_buf_index, 2);
        intel_sdvo_write_cmd(encoder, SDVO_CMD_GET_HBUF_INFO, NULL, 0);
        intel_sdvo_read_response(encoder, &buf_size, 1);

        pos = buf;
        for (j = 0; j <= buf_size; j += 8) {
            intel_sdvo_write_cmd(encoder, SDVO_CMD_GET_HBUF_DATA,
                         NULL, 0);
            intel_sdvo_read_response(encoder, pos, 8);
            pos += 8;
        }
    }
}
#endif

static bool intel_sdvo_write_infoframe(struct intel_sdvo *intel_sdvo,
                       unsigned if_index, uint8_t tx_rate,
                       uint8_t *data, unsigned length)
{
    uint8_t set_buf_index[2] = { if_index, 0 };
    uint8_t hbuf_size, tmp[8];
    int i;

    if (!intel_sdvo_set_value(intel_sdvo,
                  SDVO_CMD_SET_HBUF_INDEX,
                  set_buf_index, 2))
        return false;

    if (!intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_HBUF_INFO,
                  &hbuf_size, 1))
        return false;

    /* Buffer size is 0 based, hooray! */
    hbuf_size++;

    DRM_DEBUG_KMS("writing sdvo hbuf: %i, hbuf_size %i, hbuf_size: %i\n",
              if_index, length, hbuf_size);

    for (i = 0; i < hbuf_size; i += 8) {
        memset(tmp, 0, 8);
        if (i < length)
            memcpy(tmp, data + i, min_t(unsigned, 8, length - i));

        if (!intel_sdvo_set_value(intel_sdvo,
                      SDVO_CMD_SET_HBUF_DATA,
                      tmp, 8))
            return false;
    }

    return intel_sdvo_set_value(intel_sdvo,
                    SDVO_CMD_SET_HBUF_TXRATE,
                    &tx_rate, 1);
}

static bool intel_sdvo_set_avi_infoframe(struct intel_sdvo *intel_sdvo)
{
    struct dip_infoframe avi_if = {
        .type = DIP_TYPE_AVI,
        .ver = DIP_VERSION_AVI,
        .len = DIP_LEN_AVI,
    };
    uint8_t sdvo_data[4 + sizeof(avi_if.body.avi)];

    intel_dip_infoframe_csum(&avi_if);

    /* sdvo spec says that the ecc is handled by the hw, and it looks like
     * we must not send the ecc field, either. */
    memcpy(sdvo_data, &avi_if, 3);
    sdvo_data[3] = avi_if.checksum;
    memcpy(&sdvo_data[4], &avi_if.body, sizeof(avi_if.body.avi));

    return intel_sdvo_write_infoframe(intel_sdvo, SDVO_HBUF_INDEX_AVI_IF,
                      SDVO_HBUF_TX_VSYNC,
                      sdvo_data, sizeof(sdvo_data));
}

static bool intel_sdvo_set_tv_format(struct intel_sdvo *intel_sdvo)
{
    struct intel_sdvo_tv_format format;
    uint32_t format_map;

    format_map = 1 << intel_sdvo->tv_format_index;
    memset(&format, 0, sizeof(format));
    memcpy(&format, &format_map, min(sizeof(format), sizeof(format_map)));

    BUILD_BUG_ON(sizeof(format) != 6);
    return intel_sdvo_set_value(intel_sdvo,
                    SDVO_CMD_SET_TV_FORMAT,
                    &format, sizeof(format));
}

static bool
intel_sdvo_set_output_timings_from_mode(struct intel_sdvo *intel_sdvo,
                    const struct drm_display_mode *mode)
{
    struct intel_sdvo_dtd output_dtd;

    if (!intel_sdvo_set_target_output(intel_sdvo,
                      intel_sdvo->attached_output))
        return false;

    intel_sdvo_get_dtd_from_mode(&output_dtd, mode);
    if (!intel_sdvo_set_output_timing(intel_sdvo, &output_dtd))
        return false;

    return true;
}

/* Asks the sdvo controller for the preferred input mode given the output mode.
 * Unfortunately we have to set up the full output mode to do that. */
static bool
intel_sdvo_get_preferred_input_mode(struct intel_sdvo *intel_sdvo,
                    const struct drm_display_mode *mode,
                    struct drm_display_mode *adjusted_mode)
{
    struct intel_sdvo_dtd input_dtd;

    /* Reset the input timing to the screen. Assume always input 0. */
    if (!intel_sdvo_set_target_input(intel_sdvo))
        return false;

    if (!intel_sdvo_create_preferred_input_timing(intel_sdvo,
                              mode->clock / 10,
                              mode->hdisplay,
                              mode->vdisplay))
        return false;

    if (!intel_sdvo_get_preferred_input_timing(intel_sdvo,
                           &input_dtd))
        return false;

    intel_sdvo_get_mode_from_dtd(adjusted_mode, &input_dtd);
    intel_sdvo->dtd_sdvo_flags = input_dtd.part2.sdvo_flags;

    return true;
}

static bool intel_sdvo_mode_fixup(struct drm_encoder *encoder,
                  const struct drm_display_mode *mode,
                  struct drm_display_mode *adjusted_mode)
{
    struct intel_sdvo *intel_sdvo = to_intel_sdvo(encoder);
    int multiplier;

    /* We need to construct preferred input timings based on our
     * output timings.  To do that, we have to set the output
     * timings, even though this isn't really the right place in
     * the sequence to do it. Oh well.
     */
    if (intel_sdvo->is_tv) {
        if (!intel_sdvo_set_output_timings_from_mode(intel_sdvo, mode))
            return false;

        (void) intel_sdvo_get_preferred_input_mode(intel_sdvo,
                               mode,
                               adjusted_mode);
    } else if (intel_sdvo->is_lvds) {
        if (!intel_sdvo_set_output_timings_from_mode(intel_sdvo,
                                 intel_sdvo->sdvo_lvds_fixed_mode))
            return false;

        (void) intel_sdvo_get_preferred_input_mode(intel_sdvo,
                               mode,
                               adjusted_mode);
    }

    /* Make the CRTC code factor in the SDVO pixel multiplier.  The
     * SDVO device will factor out the multiplier during mode_set.
     */
    multiplier = intel_sdvo_get_pixel_multiplier(adjusted_mode);
    intel_mode_set_pixel_multiplier(adjusted_mode, multiplier);

    return true;
}

static void intel_sdvo_mode_set(struct drm_encoder *encoder,
                struct drm_display_mode *mode,
                struct drm_display_mode *adjusted_mode)
{
    struct drm_device *dev = encoder->dev;
    struct drm_i915_private *dev_priv = dev->dev_private;
    struct drm_crtc *crtc = encoder->crtc;
    struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
    struct intel_sdvo *intel_sdvo = to_intel_sdvo(encoder);
    u32 sdvox;
    struct intel_sdvo_in_out_map in_out;
    struct intel_sdvo_dtd input_dtd, output_dtd;
    int pixel_multiplier = intel_mode_get_pixel_multiplier(adjusted_mode);
    int rate;

    if (!mode)
        return;

    /* First, set the input mapping for the first input to our controlled
     * output. This is only correct if we're a single-input device, in
     * which case the first input is the output from the appropriate SDVO
     * channel on the motherboard.  In a two-input device, the first input
     * will be SDVOB and the second SDVOC.
     */
    in_out.in0 = intel_sdvo->attached_output;
    in_out.in1 = 0;

    intel_sdvo_set_value(intel_sdvo,
                 SDVO_CMD_SET_IN_OUT_MAP,
                 &in_out, sizeof(in_out));

    /* Set the output timings to the screen */
    if (!intel_sdvo_set_target_output(intel_sdvo,
                      intel_sdvo->attached_output))
        return;

    /* lvds has a special fixed output timing. */
    if (intel_sdvo->is_lvds)
        intel_sdvo_get_dtd_from_mode(&output_dtd,
                         intel_sdvo->sdvo_lvds_fixed_mode);
    else
        intel_sdvo_get_dtd_from_mode(&output_dtd, mode);
    if (!intel_sdvo_set_output_timing(intel_sdvo, &output_dtd))
        DRM_INFO("Setting output timings on %s failed\n",
             SDVO_NAME(intel_sdvo));

    /* Set the input timing to the screen. Assume always input 0. */
    if (!intel_sdvo_set_target_input(intel_sdvo))
        return;

    if (intel_sdvo->has_hdmi_monitor) {
        intel_sdvo_set_encode(intel_sdvo, SDVO_ENCODE_HDMI);
        intel_sdvo_set_colorimetry(intel_sdvo,
                       SDVO_COLORIMETRY_RGB256);
        intel_sdvo_set_avi_infoframe(intel_sdvo);
    } else
        intel_sdvo_set_encode(intel_sdvo, SDVO_ENCODE_DVI);

    if (intel_sdvo->is_tv &&
        !intel_sdvo_set_tv_format(intel_sdvo))
        return;

    /* We have tried to get input timing in mode_fixup, and filled into
     * adjusted_mode.
     */
    intel_sdvo_get_dtd_from_mode(&input_dtd, adjusted_mode);
    if (intel_sdvo->is_tv || intel_sdvo->is_lvds)
        input_dtd.part2.sdvo_flags = intel_sdvo->dtd_sdvo_flags;
    if (!intel_sdvo_set_input_timing(intel_sdvo, &input_dtd))
        DRM_INFO("Setting input timings on %s failed\n",
             SDVO_NAME(intel_sdvo));

    switch (pixel_multiplier) {
    default:
    case 1: rate = SDVO_CLOCK_RATE_MULT_1X; break;
    case 2: rate = SDVO_CLOCK_RATE_MULT_2X; break;
    case 4: rate = SDVO_CLOCK_RATE_MULT_4X; break;
    }
    if (!intel_sdvo_set_clock_rate_mult(intel_sdvo, rate))
        return;

    /* Set the SDVO control regs. */
    if (INTEL_INFO(dev)->gen >= 4) {
        /* The real mode polarity is set by the SDVO commands, using
         * struct intel_sdvo_dtd. */
        sdvox = SDVO_VSYNC_ACTIVE_HIGH | SDVO_HSYNC_ACTIVE_HIGH;
        if (intel_sdvo->is_hdmi)
            sdvox |= intel_sdvo->color_range;
        if (INTEL_INFO(dev)->gen < 5)
            sdvox |= SDVO_BORDER_ENABLE;
    } else {
        sdvox = I915_READ(intel_sdvo->sdvo_reg);
        switch (intel_sdvo->sdvo_reg) {
        case SDVOB:
            sdvox &= SDVOB_PRESERVE_MASK;
            break;
        case SDVOC:
            sdvox &= SDVOC_PRESERVE_MASK;
            break;
        }
        sdvox |= (9 << 19) | SDVO_BORDER_ENABLE;
    }

    if (INTEL_PCH_TYPE(dev) >= PCH_CPT)
        sdvox |= TRANSCODER_CPT(intel_crtc->pipe);
    else
        sdvox |= TRANSCODER(intel_crtc->pipe);

    if (intel_sdvo->has_hdmi_audio)
        sdvox |= SDVO_AUDIO_ENABLE;

    if (INTEL_INFO(dev)->gen >= 4) {
        /* done in crtc_mode_set as the dpll_md reg must be written early */
    } else if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev)) {
        /* done in crtc_mode_set as it lives inside the dpll register */
    } else {
        sdvox |= (pixel_multiplier - 1) << SDVO_PORT_MULTIPLY_SHIFT;
    }

    if (input_dtd.part2.sdvo_flags & SDVO_NEED_TO_STALL &&
        INTEL_INFO(dev)->gen < 5)
        sdvox |= SDVO_STALL_SELECT;
    intel_sdvo_write_sdvox(intel_sdvo, sdvox);
}

static bool intel_sdvo_connector_get_hw_state(struct intel_connector *connector)
{
    struct intel_sdvo_connector *intel_sdvo_connector =
        to_intel_sdvo_connector(&connector->base);
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(&connector->base);
    u16 active_outputs;

    intel_sdvo_get_active_outputs(intel_sdvo, &active_outputs);

    if (active_outputs & intel_sdvo_connector->output_flag)
        return true;
    else
        return false;
}

static bool intel_sdvo_get_hw_state(struct intel_encoder *encoder,
                    enum pipe *pipe)
{
    struct drm_device *dev = encoder->base.dev;
    struct drm_i915_private *dev_priv = dev->dev_private;
    struct intel_sdvo *intel_sdvo = to_intel_sdvo(&encoder->base);
    u32 tmp;

    tmp = I915_READ(intel_sdvo->sdvo_reg);

    if (!(tmp & SDVO_ENABLE))
        return false;

    if (HAS_PCH_CPT(dev))
        *pipe = PORT_TO_PIPE_CPT(tmp);
    else
        *pipe = PORT_TO_PIPE(tmp);

    return true;
}

static void intel_disable_sdvo(struct intel_encoder *encoder)
{
    struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
    struct intel_sdvo *intel_sdvo = to_intel_sdvo(&encoder->base);
    u32 temp;

    intel_sdvo_set_active_outputs(intel_sdvo, 0);
    if (0)
        intel_sdvo_set_encoder_power_state(intel_sdvo,
                           DRM_MODE_DPMS_OFF);

    temp = I915_READ(intel_sdvo->sdvo_reg);
    if ((temp & SDVO_ENABLE) != 0) {
        intel_sdvo_write_sdvox(intel_sdvo, temp & ~SDVO_ENABLE);
    }
}

static void intel_enable_sdvo(struct intel_encoder *encoder)
{
    struct drm_device *dev = encoder->base.dev;
    struct drm_i915_private *dev_priv = dev->dev_private;
    struct intel_sdvo *intel_sdvo = to_intel_sdvo(&encoder->base);
    struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
    u32 temp;
    bool input1, input2;
    int i;
    u8 status;

    temp = I915_READ(intel_sdvo->sdvo_reg);
    if ((temp & SDVO_ENABLE) == 0)
        intel_sdvo_write_sdvox(intel_sdvo, temp | SDVO_ENABLE);
    for (i = 0; i < 2; i++)
        intel_wait_for_vblank(dev, intel_crtc->pipe);

    status = intel_sdvo_get_trained_inputs(intel_sdvo, &input1, &input2);
    /* Warn if the device reported failure to sync.
     * A lot of SDVO devices fail to notify of sync, but it's
     * a given it the status is a success, we succeeded.
     */
    if (status == SDVO_CMD_STATUS_SUCCESS && !input1) {
        DRM_DEBUG_KMS("First %s output reported failure to "
                "sync\n", SDVO_NAME(intel_sdvo));
    }

    if (0)
        intel_sdvo_set_encoder_power_state(intel_sdvo,
                           DRM_MODE_DPMS_ON);
    intel_sdvo_set_active_outputs(intel_sdvo, intel_sdvo->attached_output);
}

static void intel_sdvo_dpms(struct drm_connector *connector, int mode)
{
    struct drm_crtc *crtc;
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);

    /* dvo supports only 2 dpms states. */
    if (mode != DRM_MODE_DPMS_ON)
        mode = DRM_MODE_DPMS_OFF;

    if (mode == connector->dpms)
        return;

    connector->dpms = mode;

    /* Only need to change hw state when actually enabled */
    crtc = intel_sdvo->base.base.crtc;
    if (!crtc) {
        intel_sdvo->base.connectors_active = false;
        return;
    }

    if (mode != DRM_MODE_DPMS_ON) {
        intel_sdvo_set_active_outputs(intel_sdvo, 0);
        if (0)
            intel_sdvo_set_encoder_power_state(intel_sdvo, mode);

        intel_sdvo->base.connectors_active = false;

        intel_crtc_update_dpms(crtc);
    } else {
        intel_sdvo->base.connectors_active = true;

        intel_crtc_update_dpms(crtc);

        if (0)
            intel_sdvo_set_encoder_power_state(intel_sdvo, mode);
        intel_sdvo_set_active_outputs(intel_sdvo, intel_sdvo->attached_output);
    }

    intel_modeset_check_state(connector->dev);
}

static int intel_sdvo_mode_valid(struct drm_connector *connector,
                 struct drm_display_mode *mode)
{
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);

    if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
        return MODE_NO_DBLESCAN;

    if (intel_sdvo->pixel_clock_min > mode->clock)
        return MODE_CLOCK_LOW;

    if (intel_sdvo->pixel_clock_max < mode->clock)
        return MODE_CLOCK_HIGH;

    if (intel_sdvo->is_lvds) {
        if (mode->hdisplay > intel_sdvo->sdvo_lvds_fixed_mode->hdisplay)
            return MODE_PANEL;

        if (mode->vdisplay > intel_sdvo->sdvo_lvds_fixed_mode->vdisplay)
            return MODE_PANEL;
    }

    return MODE_OK;
}

static bool intel_sdvo_get_capabilities(struct intel_sdvo *intel_sdvo, struct intel_sdvo_caps *caps)
{
    BUILD_BUG_ON(sizeof(*caps) != 8);
    if (!intel_sdvo_get_value(intel_sdvo,
                  SDVO_CMD_GET_DEVICE_CAPS,
                  caps, sizeof(*caps)))
        return false;

    DRM_DEBUG_KMS("SDVO capabilities:\n"
              "  vendor_id: %d\n"
              "  device_id: %d\n"
              "  device_rev_id: %d\n"
              "  sdvo_version_major: %d\n"
              "  sdvo_version_minor: %d\n"
              "  sdvo_inputs_mask: %d\n"
              "  smooth_scaling: %d\n"
              "  sharp_scaling: %d\n"
              "  up_scaling: %d\n"
              "  down_scaling: %d\n"
              "  stall_support: %d\n"
              "  output_flags: %d\n",
              caps->vendor_id,
              caps->device_id,
              caps->device_rev_id,
              caps->sdvo_version_major,
              caps->sdvo_version_minor,
              caps->sdvo_inputs_mask,
              caps->smooth_scaling,
              caps->sharp_scaling,
              caps->up_scaling,
              caps->down_scaling,
              caps->stall_support,
              caps->output_flags);

    return true;
}

static uint16_t intel_sdvo_get_hotplug_support(struct intel_sdvo *intel_sdvo)
{
    struct drm_device *dev = intel_sdvo->base.base.dev;
    uint16_t hotplug;

    /* HW Erratum: SDVO Hotplug is broken on all i945G chips, there's noise
     * on the line. */
    if (IS_I945G(dev) || IS_I945GM(dev))
        return 0;

    if (!intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_HOT_PLUG_SUPPORT,
                    &hotplug, sizeof(hotplug)))
        return 0;

    return hotplug;
}

static void intel_sdvo_enable_hotplug(struct intel_encoder *encoder)
{
    struct intel_sdvo *intel_sdvo = to_intel_sdvo(&encoder->base);

    intel_sdvo_write_cmd(intel_sdvo, SDVO_CMD_SET_ACTIVE_HOT_PLUG,
            &intel_sdvo->hotplug_active, 2);
}

static bool
intel_sdvo_multifunc_encoder(struct intel_sdvo *intel_sdvo)
{
    /* Is there more than one type of output? */
    return hweight16(intel_sdvo->caps.output_flags) > 1;
}

static struct edid *
intel_sdvo_get_edid(struct drm_connector *connector)
{
    struct intel_sdvo *sdvo = intel_attached_sdvo(connector);
    return drm_get_edid(connector, &sdvo->ddc);
}

/* Mac mini hack -- use the same DDC as the analog connector */
static struct edid *
intel_sdvo_get_analog_edid(struct drm_connector *connector)
{
    struct drm_i915_private *dev_priv = connector->dev->dev_private;

    return drm_get_edid(connector,
                intel_gmbus_get_adapter(dev_priv,
                            dev_priv->crt_ddc_pin));
}

static enum drm_connector_status
intel_sdvo_tmds_sink_detect(struct drm_connector *connector)
{
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
    enum drm_connector_status status;
    struct edid *edid;

    edid = intel_sdvo_get_edid(connector);

    if (edid == NULL && intel_sdvo_multifunc_encoder(intel_sdvo)) {
        u8 ddc, saved_ddc = intel_sdvo->ddc_bus;

        /*
         * Don't use the 1 as the argument of DDC bus switch to get
         * the EDID. It is used for SDVO SPD ROM.
         */
        for (ddc = intel_sdvo->ddc_bus >> 1; ddc > 1; ddc >>= 1) {
            intel_sdvo->ddc_bus = ddc;
            edid = intel_sdvo_get_edid(connector);
            if (edid)
                break;
        }
        /*
         * If we found the EDID on the other bus,
         * assume that is the correct DDC bus.
         */
        if (edid == NULL)
            intel_sdvo->ddc_bus = saved_ddc;
    }

    /*
     * When there is no edid and no monitor is connected with VGA
     * port, try to use the CRT ddc to read the EDID for DVI-connector.
     */
    if (edid == NULL)
        edid = intel_sdvo_get_analog_edid(connector);

    status = connector_status_unknown;
    if (edid != NULL) {
        /* DDC bus is shared, match EDID to connector type */
        if (edid->input & DRM_EDID_INPUT_DIGITAL) {
            status = connector_status_connected;
            if (intel_sdvo->is_hdmi) {
                intel_sdvo->has_hdmi_monitor = drm_detect_hdmi_monitor(edid);
                intel_sdvo->has_hdmi_audio = drm_detect_monitor_audio(edid);
            }
        } else
            status = connector_status_disconnected;
        kfree(edid);
    }

    if (status == connector_status_connected) {
        struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
        if (intel_sdvo_connector->force_audio != HDMI_AUDIO_AUTO)
            intel_sdvo->has_hdmi_audio = (intel_sdvo_connector->force_audio == HDMI_AUDIO_ON);
    }

    return status;
}

static bool
intel_sdvo_connector_matches_edid(struct intel_sdvo_connector *sdvo,
                  struct edid *edid)
{
    bool monitor_is_digital = !!(edid->input & DRM_EDID_INPUT_DIGITAL);
    bool connector_is_digital = !!IS_DIGITAL(sdvo);

    DRM_DEBUG_KMS("connector_is_digital? %d, monitor_is_digital? %d\n",
              connector_is_digital, monitor_is_digital);
    return connector_is_digital == monitor_is_digital;
}

static enum drm_connector_status
intel_sdvo_detect(struct drm_connector *connector, bool force)
{
    uint16_t response;
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
    struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
    enum drm_connector_status ret;

    if (!intel_sdvo_write_cmd(intel_sdvo,
                  SDVO_CMD_GET_ATTACHED_DISPLAYS, NULL, 0))
        return connector_status_unknown;

    /* add 30ms delay when the output type might be TV */
    if (intel_sdvo->caps.output_flags & SDVO_TV_MASK)
        msleep(30);

    if (!intel_sdvo_read_response(intel_sdvo, &response, 2))
        return connector_status_unknown;

    DRM_DEBUG_KMS("SDVO response %d %d [%x]\n",
              response & 0xff, response >> 8,
              intel_sdvo_connector->output_flag);

    if (response == 0)
        return connector_status_disconnected;

    intel_sdvo->attached_output = response;

    intel_sdvo->has_hdmi_monitor = false;
    intel_sdvo->has_hdmi_audio = false;

    if ((intel_sdvo_connector->output_flag & response) == 0)
        ret = connector_status_disconnected;
    else if (IS_TMDS(intel_sdvo_connector))
        ret = intel_sdvo_tmds_sink_detect(connector);
    else {
        struct edid *edid;

        /* if we have an edid check it matches the connection */
        edid = intel_sdvo_get_edid(connector);
        if (edid == NULL)
            edid = intel_sdvo_get_analog_edid(connector);
        if (edid != NULL) {
            if (intel_sdvo_connector_matches_edid(intel_sdvo_connector,
                                  edid))
                ret = connector_status_connected;
            else
                ret = connector_status_disconnected;

            kfree(edid);
        } else
            ret = connector_status_connected;
    }

    /* May update encoder flag for like clock for SDVO TV, etc.*/
    if (ret == connector_status_connected) {
        intel_sdvo->is_tv = false;
        intel_sdvo->is_lvds = false;
        intel_sdvo->base.needs_tv_clock = false;

        if (response & SDVO_TV_MASK) {
            intel_sdvo->is_tv = true;
            intel_sdvo->base.needs_tv_clock = true;
        }
        if (response & SDVO_LVDS_MASK)
            intel_sdvo->is_lvds = intel_sdvo->sdvo_lvds_fixed_mode != NULL;
    }

    return ret;
}

static void intel_sdvo_get_ddc_modes(struct drm_connector *connector)
{
    struct edid *edid;

    /* set the bus switch and get the modes */
    edid = intel_sdvo_get_edid(connector);

    /*
     * Mac mini hack.  On this device, the DVI-I connector shares one DDC
     * link between analog and digital outputs. So, if the regular SDVO
     * DDC fails, check to see if the analog output is disconnected, in
     * which case we'll look there for the digital DDC data.
     */
    if (edid == NULL)
        edid = intel_sdvo_get_analog_edid(connector);

    if (edid != NULL) {
        if (intel_sdvo_connector_matches_edid(to_intel_sdvo_connector(connector),
                              edid)) {
            drm_mode_connector_update_edid_property(connector, edid);
            drm_add_edid_modes(connector, edid);
        }

        kfree(edid);
    }
}

/*
 * Set of SDVO TV modes.
 * Note!  This is in reply order (see loop in get_tv_modes).
 * XXX: all 60Hz refresh?
 */
static const struct drm_display_mode sdvo_tv_modes[] = {
    { DRM_MODE("320x200", DRM_MODE_TYPE_DRIVER, 5815, 320, 321, 384,
           416, 0, 200, 201, 232, 233, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("320x240", DRM_MODE_TYPE_DRIVER, 6814, 320, 321, 384,
           416, 0, 240, 241, 272, 273, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("400x300", DRM_MODE_TYPE_DRIVER, 9910, 400, 401, 464,
           496, 0, 300, 301, 332, 333, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("640x350", DRM_MODE_TYPE_DRIVER, 16913, 640, 641, 704,
           736, 0, 350, 351, 382, 383, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("640x400", DRM_MODE_TYPE_DRIVER, 19121, 640, 641, 704,
           736, 0, 400, 401, 432, 433, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 22654, 640, 641, 704,
           736, 0, 480, 481, 512, 513, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("704x480", DRM_MODE_TYPE_DRIVER, 24624, 704, 705, 768,
           800, 0, 480, 481, 512, 513, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("704x576", DRM_MODE_TYPE_DRIVER, 29232, 704, 705, 768,
           800, 0, 576, 577, 608, 609, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("720x350", DRM_MODE_TYPE_DRIVER, 18751, 720, 721, 784,
           816, 0, 350, 351, 382, 383, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 21199, 720, 721, 784,
           816, 0, 400, 401, 432, 433, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 25116, 720, 721, 784,
           816, 0, 480, 481, 512, 513, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("720x540", DRM_MODE_TYPE_DRIVER, 28054, 720, 721, 784,
           816, 0, 540, 541, 572, 573, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("720x576", DRM_MODE_TYPE_DRIVER, 29816, 720, 721, 784,
           816, 0, 576, 577, 608, 609, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("768x576", DRM_MODE_TYPE_DRIVER, 31570, 768, 769, 832,
           864, 0, 576, 577, 608, 609, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 34030, 800, 801, 864,
           896, 0, 600, 601, 632, 633, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 36581, 832, 833, 896,
           928, 0, 624, 625, 656, 657, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("920x766", DRM_MODE_TYPE_DRIVER, 48707, 920, 921, 984,
           1016, 0, 766, 767, 798, 799, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 53827, 1024, 1025, 1088,
           1120, 0, 768, 769, 800, 801, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
    { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 87265, 1280, 1281, 1344,
           1376, 0, 1024, 1025, 1056, 1057, 0,
           DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
};

static void intel_sdvo_get_tv_modes(struct drm_connector *connector)
{
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
    struct intel_sdvo_sdtv_resolution_request tv_res;
    uint32_t reply = 0, format_map = 0;
    int i;

    /* Read the list of supported input resolutions for the selected TV
     * format.
     */
    format_map = 1 << intel_sdvo->tv_format_index;
    memcpy(&tv_res, &format_map,
           min(sizeof(format_map), sizeof(struct intel_sdvo_sdtv_resolution_request)));

    if (!intel_sdvo_set_target_output(intel_sdvo, intel_sdvo->attached_output))
        return;

    BUILD_BUG_ON(sizeof(tv_res) != 3);
    if (!intel_sdvo_write_cmd(intel_sdvo,
                  SDVO_CMD_GET_SDTV_RESOLUTION_SUPPORT,
                  &tv_res, sizeof(tv_res)))
        return;
    if (!intel_sdvo_read_response(intel_sdvo, &reply, 3))
        return;

    for (i = 0; i < ARRAY_SIZE(sdvo_tv_modes); i++)
        if (reply & (1 << i)) {
            struct drm_display_mode *nmode;
            nmode = drm_mode_duplicate(connector->dev,
                           &sdvo_tv_modes[i]);
            if (nmode)
                drm_mode_probed_add(connector, nmode);
        }
}

static void intel_sdvo_get_lvds_modes(struct drm_connector *connector)
{
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
    struct drm_i915_private *dev_priv = connector->dev->dev_private;
    struct drm_display_mode *newmode;

    /*
     * Attempt to get the mode list from DDC.
     * Assume that the preferred modes are
     * arranged in priority order.
     */
    intel_ddc_get_modes(connector, intel_sdvo->i2c);
    if (list_empty(&connector->probed_modes) == false)
        goto end;

    /* Fetch modes from VBT */
    if (dev_priv->sdvo_lvds_vbt_mode != NULL) {
        newmode = drm_mode_duplicate(connector->dev,
                         dev_priv->sdvo_lvds_vbt_mode);
        if (newmode != NULL) {
            /* Guarantee the mode is preferred */
            newmode->type = (DRM_MODE_TYPE_PREFERRED |
                     DRM_MODE_TYPE_DRIVER);
            drm_mode_probed_add(connector, newmode);
        }
    }

end:
    list_for_each_entry(newmode, &connector->probed_modes, head) {
        if (newmode->type & DRM_MODE_TYPE_PREFERRED) {
            intel_sdvo->sdvo_lvds_fixed_mode =
                drm_mode_duplicate(connector->dev, newmode);

            intel_sdvo->is_lvds = true;
            break;
        }
    }

}

static int intel_sdvo_get_modes(struct drm_connector *connector)
{
    struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);

    if (IS_TV(intel_sdvo_connector))
        intel_sdvo_get_tv_modes(connector);
    else if (IS_LVDS(intel_sdvo_connector))
        intel_sdvo_get_lvds_modes(connector);
    else
        intel_sdvo_get_ddc_modes(connector);

    return !list_empty(&connector->probed_modes);
}

static void
intel_sdvo_destroy_enhance_property(struct drm_connector *connector)
{
    struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
    struct drm_device *dev = connector->dev;

    if (intel_sdvo_connector->left)
        drm_property_destroy(dev, intel_sdvo_connector->left);
    if (intel_sdvo_connector->right)
        drm_property_destroy(dev, intel_sdvo_connector->right);
    if (intel_sdvo_connector->top)
        drm_property_destroy(dev, intel_sdvo_connector->top);
    if (intel_sdvo_connector->bottom)
        drm_property_destroy(dev, intel_sdvo_connector->bottom);
    if (intel_sdvo_connector->hpos)
        drm_property_destroy(dev, intel_sdvo_connector->hpos);
    if (intel_sdvo_connector->vpos)
        drm_property_destroy(dev, intel_sdvo_connector->vpos);
    if (intel_sdvo_connector->saturation)
        drm_property_destroy(dev, intel_sdvo_connector->saturation);
    if (intel_sdvo_connector->contrast)
        drm_property_destroy(dev, intel_sdvo_connector->contrast);
    if (intel_sdvo_connector->hue)
        drm_property_destroy(dev, intel_sdvo_connector->hue);
    if (intel_sdvo_connector->sharpness)
        drm_property_destroy(dev, intel_sdvo_connector->sharpness);
    if (intel_sdvo_connector->flicker_filter)
        drm_property_destroy(dev, intel_sdvo_connector->flicker_filter);
    if (intel_sdvo_connector->flicker_filter_2d)
        drm_property_destroy(dev, intel_sdvo_connector->flicker_filter_2d);
    if (intel_sdvo_connector->flicker_filter_adaptive)
        drm_property_destroy(dev, intel_sdvo_connector->flicker_filter_adaptive);
    if (intel_sdvo_connector->tv_luma_filter)
        drm_property_destroy(dev, intel_sdvo_connector->tv_luma_filter);
    if (intel_sdvo_connector->tv_chroma_filter)
        drm_property_destroy(dev, intel_sdvo_connector->tv_chroma_filter);
    if (intel_sdvo_connector->dot_crawl)
        drm_property_destroy(dev, intel_sdvo_connector->dot_crawl);
    if (intel_sdvo_connector->brightness)
        drm_property_destroy(dev, intel_sdvo_connector->brightness);
}

static void intel_sdvo_destroy(struct drm_connector *connector)
{
    struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);

    if (intel_sdvo_connector->tv_format)
        drm_property_destroy(connector->dev,
                     intel_sdvo_connector->tv_format);

    intel_sdvo_destroy_enhance_property(connector);
    drm_sysfs_connector_remove(connector);
    drm_connector_cleanup(connector);
    kfree(connector);
}

static bool intel_sdvo_detect_hdmi_audio(struct drm_connector *connector)
{
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
    struct edid *edid;
    bool has_audio = false;

    if (!intel_sdvo->is_hdmi)
        return false;

    edid = intel_sdvo_get_edid(connector);
    if (edid != NULL && edid->input & DRM_EDID_INPUT_DIGITAL)
        has_audio = drm_detect_monitor_audio(edid);
    kfree(edid);

    return has_audio;
}

static int
intel_sdvo_set_property(struct drm_connector *connector,
            struct drm_property *property,
            uint64_t val)
{
    struct intel_sdvo *intel_sdvo = intel_attached_sdvo(connector);
    struct intel_sdvo_connector *intel_sdvo_connector = to_intel_sdvo_connector(connector);
    struct drm_i915_private *dev_priv = connector->dev->dev_private;
    uint16_t temp_value;
    uint8_t cmd;
    int ret;

    ret = drm_connector_property_set_value(connector, property, val);
    if (ret)
        return ret;

    if (property == dev_priv->force_audio_property) {
        int i = val;
        bool has_audio;

        if (i == intel_sdvo_connector->force_audio)
            return 0;

        intel_sdvo_connector->force_audio = i;

        if (i == HDMI_AUDIO_AUTO)
            has_audio = intel_sdvo_detect_hdmi_audio(connector);
        else
            has_audio = (i == HDMI_AUDIO_ON);

        if (has_audio == intel_sdvo->has_hdmi_audio)
            return 0;

        intel_sdvo->has_hdmi_audio = has_audio;
        goto done;
    }

    if (property == dev_priv->broadcast_rgb_property) {
        if (val == !!intel_sdvo->color_range)
            return 0;

        intel_sdvo->color_range = val ? SDVO_COLOR_RANGE_16_235 : 0;
        goto done;
    }

#define CHECK_PROPERTY(name, NAME) \
    if (intel_sdvo_connector->name == property) { \
        if (intel_sdvo_connector->cur_##name == temp_value) return 0; \
        if (intel_sdvo_connector->max_##name < temp_value) return -EINVAL; \
        cmd = SDVO_CMD_SET_##NAME; \
        intel_sdvo_connector->cur_##name = temp_value; \
        goto set_value; \
    }

    if (property == intel_sdvo_connector->tv_format) {
        if (val >= TV_FORMAT_NUM)
            return -EINVAL;

        if (intel_sdvo->tv_format_index ==
            intel_sdvo_connector->tv_format_supported[val])
            return 0;

        intel_sdvo->tv_format_index = intel_sdvo_connector->tv_format_supported[val];
        goto done;
    } else if (IS_TV_OR_LVDS(intel_sdvo_connector)) {
        temp_value = val;
        if (intel_sdvo_connector->left == property) {
            drm_connector_property_set_value(connector,
                             intel_sdvo_connector->right, val);
            if (intel_sdvo_connector->left_margin == temp_value)
                return 0;

            intel_sdvo_connector->left_margin = temp_value;
            intel_sdvo_connector->right_margin = temp_value;
            temp_value = intel_sdvo_connector->max_hscan -
                intel_sdvo_connector->left_margin;
            cmd = SDVO_CMD_SET_OVERSCAN_H;
            goto set_value;
        } else if (intel_sdvo_connector->right == property) {
            drm_connector_property_set_value(connector,
                             intel_sdvo_connector->left, val);
            if (intel_sdvo_connector->right_margin == temp_value)
                return 0;

            intel_sdvo_connector->left_margin = temp_value;
            intel_sdvo_connector->right_margin = temp_value;
            temp_value = intel_sdvo_connector->max_hscan -
                intel_sdvo_connector->left_margin;
            cmd = SDVO_CMD_SET_OVERSCAN_H;
            goto set_value;
        } else if (intel_sdvo_connector->top == property) {
            drm_connector_property_set_value(connector,
                             intel_sdvo_connector->bottom, val);
            if (intel_sdvo_connector->top_margin == temp_value)
                return 0;

            intel_sdvo_connector->top_margin = temp_value;
            intel_sdvo_connector->bottom_margin = temp_value;
            temp_value = intel_sdvo_connector->max_vscan -
                intel_sdvo_connector->top_margin;
            cmd = SDVO_CMD_SET_OVERSCAN_V;
            goto set_value;
        } else if (intel_sdvo_connector->bottom == property) {
            drm_connector_property_set_value(connector,
                             intel_sdvo_connector->top, val);
            if (intel_sdvo_connector->bottom_margin == temp_value)
                return 0;

            intel_sdvo_connector->top_margin = temp_value;
            intel_sdvo_connector->bottom_margin = temp_value;
            temp_value = intel_sdvo_connector->max_vscan -
                intel_sdvo_connector->top_margin;
            cmd = SDVO_CMD_SET_OVERSCAN_V;
            goto set_value;
        }
        CHECK_PROPERTY(hpos, HPOS)
        CHECK_PROPERTY(vpos, VPOS)
        CHECK_PROPERTY(saturation, SATURATION)
        CHECK_PROPERTY(contrast, CONTRAST)
        CHECK_PROPERTY(hue, HUE)
        CHECK_PROPERTY(brightness, BRIGHTNESS)
        CHECK_PROPERTY(sharpness, SHARPNESS)
        CHECK_PROPERTY(flicker_filter, FLICKER_FILTER)
        CHECK_PROPERTY(flicker_filter_2d, FLICKER_FILTER_2D)
        CHECK_PROPERTY(flicker_filter_adaptive, FLICKER_FILTER_ADAPTIVE)
        CHECK_PROPERTY(tv_chroma_filter, TV_CHROMA_FILTER)
        CHECK_PROPERTY(tv_luma_filter, TV_LUMA_FILTER)
        CHECK_PROPERTY(dot_crawl, DOT_CRAWL)
    }

    return -EINVAL; /* unknown property */

set_value:
    if (!intel_sdvo_set_value(intel_sdvo, cmd, &temp_value, 2))
        return -EIO;


done:
    if (intel_sdvo->base.base.crtc) {
        struct drm_crtc *crtc = intel_sdvo->base.base.crtc;
        intel_set_mode(crtc, &crtc->mode,
                   crtc->x, crtc->y, crtc->fb);
    }

    return 0;
#undef CHECK_PROPERTY
}

static const struct drm_encoder_helper_funcs intel_sdvo_helper_funcs = {
    .mode_fixup = intel_sdvo_mode_fixup,
    .mode_set = intel_sdvo_mode_set,
    .disable = intel_encoder_noop,
};

static const struct drm_connector_funcs intel_sdvo_connector_funcs = {
    .dpms = intel_sdvo_dpms,
    .detect = intel_sdvo_detect,
    .fill_modes = drm_helper_probe_single_connector_modes,
    .set_property = intel_sdvo_set_property,
    .destroy = intel_sdvo_destroy,
};

static const struct drm_connector_helper_funcs intel_sdvo_connector_helper_funcs = {
    .get_modes = intel_sdvo_get_modes,
    .mode_valid = intel_sdvo_mode_valid,
    .best_encoder = intel_best_encoder,
};

static void intel_sdvo_enc_destroy(struct drm_encoder *encoder)
{
    struct intel_sdvo *intel_sdvo = to_intel_sdvo(encoder);

    if (intel_sdvo->sdvo_lvds_fixed_mode != NULL)
        drm_mode_destroy(encoder->dev,
                 intel_sdvo->sdvo_lvds_fixed_mode);

    i2c_del_adapter(&intel_sdvo->ddc);
    intel_encoder_destroy(encoder);
}

static const struct drm_encoder_funcs intel_sdvo_enc_funcs = {
    .destroy = intel_sdvo_enc_destroy,
};

static void
intel_sdvo_guess_ddc_bus(struct intel_sdvo *sdvo)
{
    uint16_t mask = 0;
    unsigned int num_bits;

    /* Make a mask of outputs less than or equal to our own priority in the
     * list.
     */
    switch (sdvo->controlled_output) {
    case SDVO_OUTPUT_LVDS1:
        mask |= SDVO_OUTPUT_LVDS1;
    case SDVO_OUTPUT_LVDS0:
        mask |= SDVO_OUTPUT_LVDS0;
    case SDVO_OUTPUT_TMDS1:
        mask |= SDVO_OUTPUT_TMDS1;
    case SDVO_OUTPUT_TMDS0:
        mask |= SDVO_OUTPUT_TMDS0;
    case SDVO_OUTPUT_RGB1:
        mask |= SDVO_OUTPUT_RGB1;
    case SDVO_OUTPUT_RGB0:
        mask |= SDVO_OUTPUT_RGB0;
        break;
    }

    /* Count bits to find what number we are in the priority list. */
    mask &= sdvo->caps.output_flags;
    num_bits = hweight16(mask);
    /* If more than 3 outputs, default to DDC bus 3 for now. */
    if (num_bits > 3)
        num_bits = 3;

    /* Corresponds to SDVO_CONTROL_BUS_DDCx */
    sdvo->ddc_bus = 1 << num_bits;
}

static void
intel_sdvo_select_ddc_bus(struct drm_i915_private *dev_priv,
              struct intel_sdvo *sdvo, u32 reg)
{
    struct sdvo_device_mapping *mapping;

    if (sdvo->is_sdvob)
        mapping = &(dev_priv->sdvo_mappings[0]);
    else
        mapping = &(dev_priv->sdvo_mappings[1]);

    if (mapping->initialized)
        sdvo->ddc_bus = 1 << ((mapping->ddc_pin & 0xf0) >> 4);
    else
        intel_sdvo_guess_ddc_bus(sdvo);
}

static void
intel_sdvo_select_i2c_bus(struct drm_i915_private *dev_priv,
              struct intel_sdvo *sdvo, u32 reg)
{
    struct sdvo_device_mapping *mapping;
    u8 pin;

    if (sdvo->is_sdvob)
        mapping = &dev_priv->sdvo_mappings[0];
    else
        mapping = &dev_priv->sdvo_mappings[1];

    pin = GMBUS_PORT_DPB;
    if (mapping->initialized)
        pin = mapping->i2c_pin;

    if (intel_gmbus_is_port_valid(pin)) {
        sdvo->i2c = intel_gmbus_get_adapter(dev_priv, pin);
        intel_gmbus_set_speed(sdvo->i2c, GMBUS_RATE_1MHZ);
        intel_gmbus_force_bit(sdvo->i2c, true);
    } else {
        sdvo->i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPB);
    }
}

static bool
intel_sdvo_is_hdmi_connector(struct intel_sdvo *intel_sdvo, int device)
{
    return intel_sdvo_check_supp_encode(intel_sdvo);
}

static u8
intel_sdvo_get_slave_addr(struct drm_device *dev, struct intel_sdvo *sdvo)
{
    struct drm_i915_private *dev_priv = dev->dev_private;
    struct sdvo_device_mapping *my_mapping, *other_mapping;

    if (sdvo->is_sdvob) {
        my_mapping = &dev_priv->sdvo_mappings[0];
        other_mapping = &dev_priv->sdvo_mappings[1];
    } else {
        my_mapping = &dev_priv->sdvo_mappings[1];
        other_mapping = &dev_priv->sdvo_mappings[0];
    }

    /* If the BIOS described our SDVO device, take advantage of it. */
    if (my_mapping->slave_addr)
        return my_mapping->slave_addr;

    /* If the BIOS only described a different SDVO device, use the
     * address that it isn't using.
     */
    if (other_mapping->slave_addr) {
        if (other_mapping->slave_addr == 0x70)
            return 0x72;
        else
            return 0x70;
    }

    /* No SDVO device info is found for another DVO port,
     * so use mapping assumption we had before BIOS parsing.
     */
    if (sdvo->is_sdvob)
        return 0x70;
    else
        return 0x72;
}

static void
intel_sdvo_connector_init(struct intel_sdvo_connector *connector,
              struct intel_sdvo *encoder)
{
    drm_connector_init(encoder->base.base.dev,
               &connector->base.base,
               &intel_sdvo_connector_funcs,
               connector->base.base.connector_type);

    drm_connector_helper_add(&connector->base.base,
                 &intel_sdvo_connector_helper_funcs);

    connector->base.base.interlace_allowed = 1;
    connector->base.base.doublescan_allowed = 0;
    connector->base.base.display_info.subpixel_order = SubPixelHorizontalRGB;
    connector->base.get_hw_state = intel_sdvo_connector_get_hw_state;

    intel_connector_attach_encoder(&connector->base, &encoder->base);
    drm_sysfs_connector_add(&connector->base.base);
}

static void
intel_sdvo_add_hdmi_properties(struct intel_sdvo_connector *connector)
{
    struct drm_device *dev = connector->base.base.dev;

    intel_attach_force_audio_property(&connector->base.base);
    if (INTEL_INFO(dev)->gen >= 4 && IS_MOBILE(dev))
        intel_attach_broadcast_rgb_property(&connector->base.base);
}

static bool
intel_sdvo_dvi_init(struct intel_sdvo *intel_sdvo, int device)
{
    struct drm_encoder *encoder = &intel_sdvo->base.base;
    struct drm_connector *connector;
    struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
    struct intel_connector *intel_connector;
    struct intel_sdvo_connector *intel_sdvo_connector;

    intel_sdvo_connector = kzalloc(sizeof(struct intel_sdvo_connector), GFP_KERNEL);
    if (!intel_sdvo_connector)
        return false;

    if (device == 0) {
        intel_sdvo->controlled_output |= SDVO_OUTPUT_TMDS0;
        intel_sdvo_connector->output_flag = SDVO_OUTPUT_TMDS0;
    } else if (device == 1) {
        intel_sdvo->controlled_output |= SDVO_OUTPUT_TMDS1;
        intel_sdvo_connector->output_flag = SDVO_OUTPUT_TMDS1;
    }

    intel_connector = &intel_sdvo_connector->base;
    connector = &intel_connector->base;
    if (intel_sdvo_get_hotplug_support(intel_sdvo) &
        intel_sdvo_connector->output_flag) {
        connector->polled = DRM_CONNECTOR_POLL_HPD;
        intel_sdvo->hotplug_active |= intel_sdvo_connector->output_flag;
        /* Some SDVO devices have one-shot hotplug interrupts.
         * Ensure that they get re-enabled when an interrupt happens.
         */
        intel_encoder->hot_plug = intel_sdvo_enable_hotplug;
        intel_sdvo_enable_hotplug(intel_encoder);
    } else {
        connector->polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT;
    }
    encoder->encoder_type = DRM_MODE_ENCODER_TMDS;
    connector->connector_type = DRM_MODE_CONNECTOR_DVID;

    if (intel_sdvo_is_hdmi_connector(intel_sdvo, device)) {
        connector->connector_type = DRM_MODE_CONNECTOR_HDMIA;
        intel_sdvo->is_hdmi = true;
    }

    intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);
    if (intel_sdvo->is_hdmi)
        intel_sdvo_add_hdmi_properties(intel_sdvo_connector);

    return true;
}

static bool
intel_sdvo_tv_init(struct intel_sdvo *intel_sdvo, int type)
{
    struct drm_encoder *encoder = &intel_sdvo->base.base;
    struct drm_connector *connector;
    struct intel_connector *intel_connector;
    struct intel_sdvo_connector *intel_sdvo_connector;

    intel_sdvo_connector = kzalloc(sizeof(struct intel_sdvo_connector), GFP_KERNEL);
    if (!intel_sdvo_connector)
        return false;

    intel_connector = &intel_sdvo_connector->base;
    connector = &intel_connector->base;
    encoder->encoder_type = DRM_MODE_ENCODER_TVDAC;
    connector->connector_type = DRM_MODE_CONNECTOR_SVIDEO;

    intel_sdvo->controlled_output |= type;
    intel_sdvo_connector->output_flag = type;

    intel_sdvo->is_tv = true;
    intel_sdvo->base.needs_tv_clock = true;

    intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);

    if (!intel_sdvo_tv_create_property(intel_sdvo, intel_sdvo_connector, type))
        goto err;

    if (!intel_sdvo_create_enhance_property(intel_sdvo, intel_sdvo_connector))
        goto err;

    return true;

err:
    intel_sdvo_destroy(connector);
    return false;
}

static bool
intel_sdvo_analog_init(struct intel_sdvo *intel_sdvo, int device)
{
    struct drm_encoder *encoder = &intel_sdvo->base.base;
    struct drm_connector *connector;
    struct intel_connector *intel_connector;
    struct intel_sdvo_connector *intel_sdvo_connector;

    intel_sdvo_connector = kzalloc(sizeof(struct intel_sdvo_connector), GFP_KERNEL);
    if (!intel_sdvo_connector)
        return false;

    intel_connector = &intel_sdvo_connector->base;
    connector = &intel_connector->base;
    connector->polled = DRM_CONNECTOR_POLL_CONNECT;
    encoder->encoder_type = DRM_MODE_ENCODER_DAC;
    connector->connector_type = DRM_MODE_CONNECTOR_VGA;

    if (device == 0) {
        intel_sdvo->controlled_output |= SDVO_OUTPUT_RGB0;
        intel_sdvo_connector->output_flag = SDVO_OUTPUT_RGB0;
    } else if (device == 1) {
        intel_sdvo->controlled_output |= SDVO_OUTPUT_RGB1;
        intel_sdvo_connector->output_flag = SDVO_OUTPUT_RGB1;
    }

    intel_sdvo_connector_init(intel_sdvo_connector,
                  intel_sdvo);
    return true;
}

static bool
intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device)
{
    struct drm_encoder *encoder = &intel_sdvo->base.base;
    struct drm_connector *connector;
    struct intel_connector *intel_connector;
    struct intel_sdvo_connector *intel_sdvo_connector;

    intel_sdvo_connector = kzalloc(sizeof(struct intel_sdvo_connector), GFP_KERNEL);
    if (!intel_sdvo_connector)
        return false;

    intel_connector = &intel_sdvo_connector->base;
    connector = &intel_connector->base;
    encoder->encoder_type = DRM_MODE_ENCODER_LVDS;
    connector->connector_type = DRM_MODE_CONNECTOR_LVDS;

    if (device == 0) {
        intel_sdvo->controlled_output |= SDVO_OUTPUT_LVDS0;
        intel_sdvo_connector->output_flag = SDVO_OUTPUT_LVDS0;
    } else if (device == 1) {
        intel_sdvo->controlled_output |= SDVO_OUTPUT_LVDS1;
        intel_sdvo_connector->output_flag = SDVO_OUTPUT_LVDS1;
    }

    intel_sdvo_connector_init(intel_sdvo_connector, intel_sdvo);
    if (!intel_sdvo_create_enhance_property(intel_sdvo, intel_sdvo_connector))
        goto err;

    return true;

err:
    intel_sdvo_destroy(connector);
    return false;
}

static bool
intel_sdvo_output_setup(struct intel_sdvo *intel_sdvo, uint16_t flags)
{
    intel_sdvo->is_tv = false;
    intel_sdvo->base.needs_tv_clock = false;
    intel_sdvo->is_lvds = false;

    /* SDVO requires XXX1 function may not exist unless it has XXX0 function.*/

    if (flags & SDVO_OUTPUT_TMDS0)
        if (!intel_sdvo_dvi_init(intel_sdvo, 0))
            return false;

    if ((flags & SDVO_TMDS_MASK) == SDVO_TMDS_MASK)
        if (!intel_sdvo_dvi_init(intel_sdvo, 1))
            return false;

    /* TV has no XXX1 function block */
    if (flags & SDVO_OUTPUT_SVID0)
        if (!intel_sdvo_tv_init(intel_sdvo, SDVO_OUTPUT_SVID0))
            return false;

    if (flags & SDVO_OUTPUT_CVBS0)
        if (!intel_sdvo_tv_init(intel_sdvo, SDVO_OUTPUT_CVBS0))
            return false;

    if (flags & SDVO_OUTPUT_YPRPB0)
        if (!intel_sdvo_tv_init(intel_sdvo, SDVO_OUTPUT_YPRPB0))
            return false;

    if (flags & SDVO_OUTPUT_RGB0)
        if (!intel_sdvo_analog_init(intel_sdvo, 0))
            return false;

    if ((flags & SDVO_RGB_MASK) == SDVO_RGB_MASK)
        if (!intel_sdvo_analog_init(intel_sdvo, 1))
            return false;

    if (flags & SDVO_OUTPUT_LVDS0)
        if (!intel_sdvo_lvds_init(intel_sdvo, 0))
            return false;

    if ((flags & SDVO_LVDS_MASK) == SDVO_LVDS_MASK)
        if (!intel_sdvo_lvds_init(intel_sdvo, 1))
            return false;

    if ((flags & SDVO_OUTPUT_MASK) == 0) {
        unsigned char bytes[2];

        intel_sdvo->controlled_output = 0;
        memcpy(bytes, &intel_sdvo->caps.output_flags, 2);
        DRM_DEBUG_KMS("%s: Unknown SDVO output type (0x%02x%02x)\n",
                  SDVO_NAME(intel_sdvo),
                  bytes[0], bytes[1]);
        return false;
    }
    intel_sdvo->base.crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);

    return true;
}

static void intel_sdvo_output_cleanup(struct intel_sdvo *intel_sdvo)
{
    struct drm_device *dev = intel_sdvo->base.base.dev;
    struct drm_connector *connector, *tmp;

    list_for_each_entry_safe(connector, tmp,
                 &dev->mode_config.connector_list, head) {
        if (intel_attached_encoder(connector) == &intel_sdvo->base)
            intel_sdvo_destroy(connector);
    }
}

static bool intel_sdvo_tv_create_property(struct intel_sdvo *intel_sdvo,
                      struct intel_sdvo_connector *intel_sdvo_connector,
                      int type)
{
    struct drm_device *dev = intel_sdvo->base.base.dev;
    struct intel_sdvo_tv_format format;
    uint32_t format_map, i;

    if (!intel_sdvo_set_target_output(intel_sdvo, type))
        return false;

    BUILD_BUG_ON(sizeof(format) != 6);
    if (!intel_sdvo_get_value(intel_sdvo,
                  SDVO_CMD_GET_SUPPORTED_TV_FORMATS,
                  &format, sizeof(format)))
        return false;

    memcpy(&format_map, &format, min(sizeof(format_map), sizeof(format)));

    if (format_map == 0)
        return false;

    intel_sdvo_connector->format_supported_num = 0;
    for (i = 0 ; i < TV_FORMAT_NUM; i++)
        if (format_map & (1 << i))
            intel_sdvo_connector->tv_format_supported[intel_sdvo_connector->format_supported_num++] = i;


    intel_sdvo_connector->tv_format =
            drm_property_create(dev, DRM_MODE_PROP_ENUM,
                        "mode", intel_sdvo_connector->format_supported_num);
    if (!intel_sdvo_connector->tv_format)
        return false;

    for (i = 0; i < intel_sdvo_connector->format_supported_num; i++)
        drm_property_add_enum(
                intel_sdvo_connector->tv_format, i,
                i, tv_format_names[intel_sdvo_connector->tv_format_supported[i]]);

    intel_sdvo->tv_format_index = intel_sdvo_connector->tv_format_supported[0];
    drm_connector_attach_property(&intel_sdvo_connector->base.base,
                      intel_sdvo_connector->tv_format, 0);
    return true;

}

#define ENHANCEMENT(name, NAME) do { \
    if (enhancements.name) { \
        if (!intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_MAX_##NAME, &data_value, 4) || \
            !intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_##NAME, &response, 2)) \
            return false; \
        intel_sdvo_connector->max_##name = data_value[0]; \
        intel_sdvo_connector->cur_##name = response; \
        intel_sdvo_connector->name = \
            drm_property_create_range(dev, 0, #name, 0, data_value[0]); \
        if (!intel_sdvo_connector->name) return false; \
        drm_connector_attach_property(connector, \
                          intel_sdvo_connector->name, \
                          intel_sdvo_connector->cur_##name); \
        DRM_DEBUG_KMS(#name ": max %d, default %d, current %d\n", \
                  data_value[0], data_value[1], response); \
    } \
} while (0)

static bool
intel_sdvo_create_enhance_property_tv(struct intel_sdvo *intel_sdvo,
                      struct intel_sdvo_connector *intel_sdvo_connector,
                      struct intel_sdvo_enhancements_reply enhancements)
{
    struct drm_device *dev = intel_sdvo->base.base.dev;
    struct drm_connector *connector = &intel_sdvo_connector->base.base;
    uint16_t response, data_value[2];

    /* when horizontal overscan is supported, Add the left/right  property */
    if (enhancements.overscan_h) {
        if (!intel_sdvo_get_value(intel_sdvo,
                      SDVO_CMD_GET_MAX_OVERSCAN_H,
                      &data_value, 4))
            return false;

        if (!intel_sdvo_get_value(intel_sdvo,
                      SDVO_CMD_GET_OVERSCAN_H,
                      &response, 2))
            return false;

        intel_sdvo_connector->max_hscan = data_value[0];
        intel_sdvo_connector->left_margin = data_value[0] - response;
        intel_sdvo_connector->right_margin = intel_sdvo_connector->left_margin;
        intel_sdvo_connector->left =
            drm_property_create_range(dev, 0, "left_margin", 0, data_value[0]);
        if (!intel_sdvo_connector->left)
            return false;

        drm_connector_attach_property(connector,
                          intel_sdvo_connector->left,
                          intel_sdvo_connector->left_margin);

        intel_sdvo_connector->right =
            drm_property_create_range(dev, 0, "right_margin", 0, data_value[0]);
        if (!intel_sdvo_connector->right)
            return false;

        drm_connector_attach_property(connector,
                          intel_sdvo_connector->right,
                          intel_sdvo_connector->right_margin);
        DRM_DEBUG_KMS("h_overscan: max %d, "
                  "default %d, current %d\n",
                  data_value[0], data_value[1], response);
    }

    if (enhancements.overscan_v) {
        if (!intel_sdvo_get_value(intel_sdvo,
                      SDVO_CMD_GET_MAX_OVERSCAN_V,
                      &data_value, 4))
            return false;

        if (!intel_sdvo_get_value(intel_sdvo,
                      SDVO_CMD_GET_OVERSCAN_V,
                      &response, 2))
            return false;

        intel_sdvo_connector->max_vscan = data_value[0];
        intel_sdvo_connector->top_margin = data_value[0] - response;
        intel_sdvo_connector->bottom_margin = intel_sdvo_connector->top_margin;
        intel_sdvo_connector->top =
            drm_property_create_range(dev, 0,
                        "top_margin", 0, data_value[0]);
        if (!intel_sdvo_connector->top)
            return false;

        drm_connector_attach_property(connector,
                          intel_sdvo_connector->top,
                          intel_sdvo_connector->top_margin);

        intel_sdvo_connector->bottom =
            drm_property_create_range(dev, 0,
                        "bottom_margin", 0, data_value[0]);
        if (!intel_sdvo_connector->bottom)
            return false;

        drm_connector_attach_property(connector,
                          intel_sdvo_connector->bottom,
                          intel_sdvo_connector->bottom_margin);
        DRM_DEBUG_KMS("v_overscan: max %d, "
                  "default %d, current %d\n",
                  data_value[0], data_value[1], response);
    }

    ENHANCEMENT(hpos, HPOS);
    ENHANCEMENT(vpos, VPOS);
    ENHANCEMENT(saturation, SATURATION);
    ENHANCEMENT(contrast, CONTRAST);
    ENHANCEMENT(hue, HUE);
    ENHANCEMENT(sharpness, SHARPNESS);
    ENHANCEMENT(brightness, BRIGHTNESS);
    ENHANCEMENT(flicker_filter, FLICKER_FILTER);
    ENHANCEMENT(flicker_filter_adaptive, FLICKER_FILTER_ADAPTIVE);
    ENHANCEMENT(flicker_filter_2d, FLICKER_FILTER_2D);
    ENHANCEMENT(tv_chroma_filter, TV_CHROMA_FILTER);
    ENHANCEMENT(tv_luma_filter, TV_LUMA_FILTER);

    if (enhancements.dot_crawl) {
        if (!intel_sdvo_get_value(intel_sdvo, SDVO_CMD_GET_DOT_CRAWL, &response, 2))
            return false;

        intel_sdvo_connector->max_dot_crawl = 1;
        intel_sdvo_connector->cur_dot_crawl = response & 0x1;
        intel_sdvo_connector->dot_crawl =
            drm_property_create_range(dev, 0, "dot_crawl", 0, 1);
        if (!intel_sdvo_connector->dot_crawl)
            return false;

        drm_connector_attach_property(connector,
                          intel_sdvo_connector->dot_crawl,
                          intel_sdvo_connector->cur_dot_crawl);
        DRM_DEBUG_KMS("dot crawl: current %d\n", response);
    }

    return true;
}

static bool
intel_sdvo_create_enhance_property_lvds(struct intel_sdvo *intel_sdvo,
                    struct intel_sdvo_connector *intel_sdvo_connector,
                    struct intel_sdvo_enhancements_reply enhancements)
{
    struct drm_device *dev = intel_sdvo->base.base.dev;
    struct drm_connector *connector = &intel_sdvo_connector->base.base;
    uint16_t response, data_value[2];

    ENHANCEMENT(brightness, BRIGHTNESS);

    return true;
}
#undef ENHANCEMENT

static bool intel_sdvo_create_enhance_property(struct intel_sdvo *intel_sdvo,
                           struct intel_sdvo_connector *intel_sdvo_connector)
{
    union {
        struct intel_sdvo_enhancements_reply reply;
        uint16_t response;
    } enhancements;

    BUILD_BUG_ON(sizeof(enhancements) != 2);

    enhancements.response = 0;
    intel_sdvo_get_value(intel_sdvo,
                 SDVO_CMD_GET_SUPPORTED_ENHANCEMENTS,
                 &enhancements, sizeof(enhancements));
    if (enhancements.response == 0) {
        DRM_DEBUG_KMS("No enhancement is supported\n");
        return true;
    }

    if (IS_TV(intel_sdvo_connector))
        return intel_sdvo_create_enhance_property_tv(intel_sdvo, intel_sdvo_connector, enhancements.reply);
    else if (IS_LVDS(intel_sdvo_connector))
        return intel_sdvo_create_enhance_property_lvds(intel_sdvo, intel_sdvo_connector, enhancements.reply);
    else
        return true;
}

static int intel_sdvo_ddc_proxy_xfer(struct i2c_adapter *adapter,
                     struct i2c_msg *msgs,
                     int num)
{
    struct intel_sdvo *sdvo = adapter->algo_data;

    if (!intel_sdvo_set_control_bus_switch(sdvo, sdvo->ddc_bus))
        return -EIO;

    return sdvo->i2c->algo->master_xfer(sdvo->i2c, msgs, num);
}

static u32 intel_sdvo_ddc_proxy_func(struct i2c_adapter *adapter)
{
    struct intel_sdvo *sdvo = adapter->algo_data;
    return sdvo->i2c->algo->functionality(sdvo->i2c);
}

static const struct i2c_algorithm intel_sdvo_ddc_proxy = {
    .master_xfer    = intel_sdvo_ddc_proxy_xfer,
    .functionality  = intel_sdvo_ddc_proxy_func
};

static bool
intel_sdvo_init_ddc_proxy(struct intel_sdvo *sdvo,
              struct drm_device *dev)
{
    sdvo->ddc.owner = THIS_MODULE;
    sdvo->ddc.class = I2C_CLASS_DDC;
    snprintf(sdvo->ddc.name, I2C_NAME_SIZE, "SDVO DDC proxy");
    sdvo->ddc.dev.parent = &dev->pdev->dev;
    sdvo->ddc.algo_data = sdvo;
    sdvo->ddc.algo = &intel_sdvo_ddc_proxy;

    return i2c_add_adapter(&sdvo->ddc) == 0;
}

bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg, bool is_sdvob)
{
    struct drm_i915_private *dev_priv = dev->dev_private;
    struct intel_encoder *intel_encoder;
    struct intel_sdvo *intel_sdvo;
    u32 hotplug_mask;
    int i;

    intel_sdvo = kzalloc(sizeof(struct intel_sdvo), GFP_KERNEL);
    if (!intel_sdvo)
        return false;

    intel_sdvo->sdvo_reg = sdvo_reg;
    intel_sdvo->is_sdvob = is_sdvob;
    intel_sdvo->slave_addr = intel_sdvo_get_slave_addr(dev, intel_sdvo) >> 1;
    intel_sdvo_select_i2c_bus(dev_priv, intel_sdvo, sdvo_reg);
    if (!intel_sdvo_init_ddc_proxy(intel_sdvo, dev)) {
        kfree(intel_sdvo);
        return false;
    }

    /* encoder type will be decided later */
    intel_encoder = &intel_sdvo->base;
    intel_encoder->type = INTEL_OUTPUT_SDVO;
    drm_encoder_init(dev, &intel_encoder->base, &intel_sdvo_enc_funcs, 0);

    /* Read the regs to test if we can talk to the device */
    for (i = 0; i < 0x40; i++) {
        u8 byte;

        if (!intel_sdvo_read_byte(intel_sdvo, i, &byte)) {
            DRM_DEBUG_KMS("No SDVO device found on %s\n",
                      SDVO_NAME(intel_sdvo));
            goto err;
        }
    }

    hotplug_mask = 0;
    if (IS_G4X(dev)) {
        hotplug_mask = intel_sdvo->is_sdvob ?
            SDVOB_HOTPLUG_INT_STATUS_G4X : SDVOC_HOTPLUG_INT_STATUS_G4X;
    } else if (IS_GEN4(dev)) {
        hotplug_mask = intel_sdvo->is_sdvob ?
            SDVOB_HOTPLUG_INT_STATUS_I965 : SDVOC_HOTPLUG_INT_STATUS_I965;
    } else {
        hotplug_mask = intel_sdvo->is_sdvob ?
            SDVOB_HOTPLUG_INT_STATUS_I915 : SDVOC_HOTPLUG_INT_STATUS_I915;
    }

    drm_encoder_helper_add(&intel_encoder->base, &intel_sdvo_helper_funcs);

    intel_encoder->disable = intel_disable_sdvo;
    intel_encoder->enable = intel_enable_sdvo;
    intel_encoder->get_hw_state = intel_sdvo_get_hw_state;

    /* In default case sdvo lvds is false */
    if (!intel_sdvo_get_capabilities(intel_sdvo, &intel_sdvo->caps))
        goto err;

    if (intel_sdvo_output_setup(intel_sdvo,
                    intel_sdvo->caps.output_flags) != true) {
        DRM_DEBUG_KMS("SDVO output failed to setup on %s\n",
                  SDVO_NAME(intel_sdvo));
        /* Output_setup can leave behind connectors! */
        goto err_output;
    }

    /*
     * Cloning SDVO with anything is often impossible, since the SDVO
     * encoder can request a special input timing mode. And even if that's
     * not the case we have evidence that cloning a plain unscaled mode with
     * VGA doesn't really work. Furthermore the cloning flags are way too
     * simplistic anyway to express such constraints, so just give up on
     * cloning for SDVO encoders.
     */
    intel_sdvo->base.cloneable = false;

    /* Only enable the hotplug irq if we need it, to work around noisy
     * hotplug lines.
     */
    if (intel_sdvo->hotplug_active)
        dev_priv->hotplug_supported_mask |= hotplug_mask;

    intel_sdvo_select_ddc_bus(dev_priv, intel_sdvo, sdvo_reg);

    /* Set the input timing to the screen. Assume always input 0. */
    if (!intel_sdvo_set_target_input(intel_sdvo))
        goto err_output;

    if (!intel_sdvo_get_input_pixel_clock_range(intel_sdvo,
                            &intel_sdvo->pixel_clock_min,
                            &intel_sdvo->pixel_clock_max))
        goto err_output;

    DRM_DEBUG_KMS("%s device VID/DID: %02X:%02X.%02X, "
            "clock range %dMHz - %dMHz, "
            "input 1: %c, input 2: %c, "
            "output 1: %c, output 2: %c\n",
            SDVO_NAME(intel_sdvo),
            intel_sdvo->caps.vendor_id, intel_sdvo->caps.device_id,
            intel_sdvo->caps.device_rev_id,
            intel_sdvo->pixel_clock_min / 1000,
            intel_sdvo->pixel_clock_max / 1000,
            (intel_sdvo->caps.sdvo_inputs_mask & 0x1) ? 'Y' : 'N',
            (intel_sdvo->caps.sdvo_inputs_mask & 0x2) ? 'Y' : 'N',
            /* check currently supported outputs */
            intel_sdvo->caps.output_flags &
            (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_RGB0) ? 'Y' : 'N',
            intel_sdvo->caps.output_flags &
            (SDVO_OUTPUT_TMDS1 | SDVO_OUTPUT_RGB1) ? 'Y' : 'N');
    return true;

err_output:
    intel_sdvo_output_cleanup(intel_sdvo);

err:
    drm_encoder_cleanup(&intel_encoder->base);
    i2c_del_adapter(&intel_sdvo->ddc);
    kfree(intel_sdvo);

    return false;
}