nv50.c

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/*
 * Copyright 2011 Red Hat Inc.
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Ben Skeggs
 */

#include <subdev/mxm.h>
#include <subdev/bios.h>
#include <subdev/bios/conn.h>
#include <subdev/bios/dcb.h>
#include <subdev/bios/mxm.h>

#include "mxms.h"

struct nv50_mxm_priv {
    struct nouveau_mxm base;
};

struct context {
    u32 *outp;
    struct mxms_odev desc;
};

static bool
mxm_match_tmds_partner(struct nouveau_mxm *mxm, u8 *data, void *info)
{
    struct context *ctx = info;
    struct mxms_odev desc;

    mxms_output_device(mxm, data, &desc);
    if (desc.outp_type == 2 &&
        desc.dig_conn == ctx->desc.dig_conn)
        return false;
    return true;
}

static bool
mxm_match_dcb(struct nouveau_mxm *mxm, u8 *data, void *info)
{
    struct nouveau_bios *bios = nouveau_bios(mxm);
    struct context *ctx = info;
    u64 desc = *(u64 *)data;

    mxms_output_device(mxm, data, &ctx->desc);

    /* match dcb encoder type to mxm-ods device type */
    if ((ctx->outp[0] & 0x0000000f) != ctx->desc.outp_type)
        return true;

    /* digital output, have some extra stuff to match here, there's a
     * table in the vbios that provides a mapping from the mxm digital
     * connection enum values to SOR/link
     */
    if ((desc & 0x00000000000000f0) >= 0x20) {
        /* check against sor index */
        u8 link = mxm_sor_map(bios, ctx->desc.dig_conn);
        if ((ctx->outp[0] & 0x0f000000) != (link & 0x0f) << 24)
            return true;

        /* check dcb entry has a compatible link field */
        link = (link & 0x30) >> 4;
        if ((link & ((ctx->outp[1] & 0x00000030) >> 4)) != link)
            return true;
    }

    /* mark this descriptor accounted for by setting invalid device type,
     * except of course some manufactures don't follow specs properly and
     * we need to avoid killing off the TMDS function on DP connectors
     * if MXM-SIS is missing an entry for it.
     */
    data[0] &= ~0xf0;
    if (ctx->desc.outp_type == 6 && ctx->desc.conn_type == 6 &&
        mxms_foreach(mxm, 0x01, mxm_match_tmds_partner, ctx)) {
        data[0] |= 0x20; /* modify descriptor to match TMDS now */
    } else {
        data[0] |= 0xf0;
    }

    return false;
}

static int
mxm_dcb_sanitise_entry(struct nouveau_bios *bios, void *data, int idx, u16 pdcb)
{
    struct nouveau_mxm *mxm = nouveau_mxm(bios);
    struct context ctx = { .outp = (u32 *)(bios->data + pdcb) };
    u8 type, i2cidx, link, ver, len;
    u8 *conn;

    /* look for an output device structure that matches this dcb entry.
     * if one isn't found, disable it.
     */
    if (mxms_foreach(mxm, 0x01, mxm_match_dcb, &ctx)) {
        nv_debug(mxm, "disable %d: 0x%08x 0x%08x\n",
            idx, ctx.outp[0], ctx.outp[1]);
        ctx.outp[0] |= 0x0000000f;
        return 0;
    }

    /* modify the output's ddc/aux port, there's a pointer to a table
     * with the mapping from mxm ddc/aux port to dcb i2c_index in the
     * vbios mxm table
     */
    i2cidx = mxm_ddc_map(bios, ctx.desc.ddc_port);
    if ((ctx.outp[0] & 0x0000000f) != DCB_OUTPUT_DP)
        i2cidx = (i2cidx & 0x0f) << 4;
    else
        i2cidx = (i2cidx & 0xf0);

    if (i2cidx != 0xf0) {
        ctx.outp[0] &= ~0x000000f0;
        ctx.outp[0] |= i2cidx;
    }

    /* override dcb sorconf.link, based on what mxm data says */
    switch (ctx.desc.outp_type) {
    case 0x00: /* Analog CRT */
    case 0x01: /* Analog TV/HDTV */
        break;
    default:
        link = mxm_sor_map(bios, ctx.desc.dig_conn) & 0x30;
        ctx.outp[1] &= ~0x00000030;
        ctx.outp[1] |= link;
        break;
    }

    /* we may need to fixup various other vbios tables based on what
     * the descriptor says the connector type should be.
     *
     * in a lot of cases, the vbios tables will claim DVI-I is possible,
     * and the mxm data says the connector is really HDMI.  another
     * common example is DP->eDP.
     */
    conn  = bios->data;
    conn += dcb_conn(bios, (ctx.outp[0] & 0x0000f000) >> 12, &ver, &len);
    type  = conn[0];
    switch (ctx.desc.conn_type) {
    case 0x01: /* LVDS */
        ctx.outp[1] |= 0x00000004; /* use_power_scripts */
        /* XXX: modify default link width in LVDS table */
        break;
    case 0x02: /* HDMI */
        type = DCB_CONNECTOR_HDMI_1;
        break;
    case 0x03: /* DVI-D */
        type = DCB_CONNECTOR_DVI_D;
        break;
    case 0x0e: /* eDP, falls through to DPint */
        ctx.outp[1] |= 0x00010000;
    case 0x07: /* DP internal, wtf is this?? HP8670w */
        ctx.outp[1] |= 0x00000004; /* use_power_scripts? */
        type = DCB_CONNECTOR_eDP;
        break;
    default:
        break;
    }

    if (mxms_version(mxm) >= 0x0300)
        conn[0] = type;

    return 0;
}

static bool
mxm_show_unmatched(struct nouveau_mxm *mxm, u8 *data, void *info)
{
    u64 desc = *(u64 *)data;
    if ((desc & 0xf0) != 0xf0)
    nv_info(mxm, "unmatched output device 0x%016llx\n", desc);
    return true;
}

static void
mxm_dcb_sanitise(struct nouveau_mxm *mxm)
{
    struct nouveau_bios *bios = nouveau_bios(mxm);
    u8  ver, hdr, cnt, len;
    u16 dcb = dcb_table(bios, &ver, &hdr, &cnt, &len);
    if (dcb == 0x0000 || ver != 0x40) {
        nv_debug(mxm, "unsupported DCB version\n");
        return;
    }

    dcb_outp_foreach(bios, NULL, mxm_dcb_sanitise_entry);
    mxms_foreach(mxm, 0x01, mxm_show_unmatched, NULL);
}

static int
nv50_mxm_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
          struct nouveau_oclass *oclass, void *data, u32 size,
          struct nouveau_object **pobject)
{
    struct nv50_mxm_priv *priv;
    int ret;

    ret = nouveau_mxm_create(parent, engine, oclass, &priv);
    *pobject = nv_object(priv);
    if (ret)
        return ret;

    if (priv->base.action & MXM_SANITISE_DCB)
        mxm_dcb_sanitise(&priv->base);
    return 0;
}

struct nouveau_oclass
nv50_mxm_oclass = {
    .handle = NV_SUBDEV(MXM, 0x50),
    .ofuncs = &(struct nouveau_ofuncs) {
        .ctor = nv50_mxm_ctor,
        .dtor = _nouveau_mxm_dtor,
        .init = _nouveau_mxm_init,
        .fini = _nouveau_mxm_fini,
    },
};