omap_encoder.c

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/*
 * drivers/staging/omapdrm/omap_encoder.c
 *
 * Copyright (C) 2011 Texas Instruments
 * Author: Rob Clark <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "omap_drv.h"

#include "drm_crtc.h"
#include "drm_crtc_helper.h"

/*
 * encoder funcs
 */

#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)

struct omap_encoder {
    struct drm_encoder base;
    struct omap_overlay_manager *mgr;
};

static void omap_encoder_destroy(struct drm_encoder *encoder)
{
    struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
    DBG("%s", omap_encoder->mgr->name);
    drm_encoder_cleanup(encoder);
    kfree(omap_encoder);
}

static void omap_encoder_dpms(struct drm_encoder *encoder, int mode)
{
    struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
    DBG("%s: %d", omap_encoder->mgr->name, mode);
}

static bool omap_encoder_mode_fixup(struct drm_encoder *encoder,
                  const struct drm_display_mode *mode,
                  struct drm_display_mode *adjusted_mode)
{
    struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
    DBG("%s", omap_encoder->mgr->name);
    return true;
}

static void omap_encoder_mode_set(struct drm_encoder *encoder,
                struct drm_display_mode *mode,
                struct drm_display_mode *adjusted_mode)
{
    struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
    struct drm_device *dev = encoder->dev;
    struct omap_drm_private *priv = dev->dev_private;
    int i;

    mode = adjusted_mode;

    DBG("%s: set mode: %dx%d", omap_encoder->mgr->name,
            mode->hdisplay, mode->vdisplay);

    for (i = 0; i < priv->num_connectors; i++) {
        struct drm_connector *connector = priv->connectors[i];
        if (connector->encoder == encoder) {
            omap_connector_mode_set(connector, mode);
        }
    }
}

static void omap_encoder_prepare(struct drm_encoder *encoder)
{
    struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
    struct drm_encoder_helper_funcs *encoder_funcs =
                encoder->helper_private;
    DBG("%s", omap_encoder->mgr->name);
    encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
}

static void omap_encoder_commit(struct drm_encoder *encoder)
{
    struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
    struct drm_encoder_helper_funcs *encoder_funcs =
                encoder->helper_private;
    DBG("%s", omap_encoder->mgr->name);
    omap_encoder->mgr->apply(omap_encoder->mgr);
    encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
}

static const struct drm_encoder_funcs omap_encoder_funcs = {
    .destroy = omap_encoder_destroy,
};

static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
    .dpms = omap_encoder_dpms,
    .mode_fixup = omap_encoder_mode_fixup,
    .mode_set = omap_encoder_mode_set,
    .prepare = omap_encoder_prepare,
    .commit = omap_encoder_commit,
};

struct omap_overlay_manager *omap_encoder_get_manager(
        struct drm_encoder *encoder)
{
    struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
    return omap_encoder->mgr;
}

/* initialize encoder */
struct drm_encoder *omap_encoder_init(struct drm_device *dev,
        struct omap_overlay_manager *mgr)
{
    struct drm_encoder *encoder = NULL;
    struct omap_encoder *omap_encoder;
    struct omap_overlay_manager_info info;
    int ret;

    DBG("%s", mgr->name);

    omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
    if (!omap_encoder) {
        dev_err(dev->dev, "could not allocate encoder\n");
        goto fail;
    }

    omap_encoder->mgr = mgr;
    encoder = &omap_encoder->base;

    drm_encoder_init(dev, encoder, &omap_encoder_funcs,
             DRM_MODE_ENCODER_TMDS);
    drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);

    mgr->get_manager_info(mgr, &info);

    /* TODO: fix hard-coded setup.. */
    info.default_color = 0x00000000;
    info.trans_key = 0x00000000;
    info.trans_key_type = OMAP_DSS_COLOR_KEY_GFX_DST;
    info.trans_enabled = false;

    ret = mgr->set_manager_info(mgr, &info);
    if (ret) {
        dev_err(dev->dev, "could not set manager info\n");
        goto fail;
    }

    ret = mgr->apply(mgr);
    if (ret) {
        dev_err(dev->dev, "could not apply\n");
        goto fail;
    }

    return encoder;

fail:
    if (encoder) {
        omap_encoder_destroy(encoder);
    }

    return NULL;
}