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/*
* drivers/staging/omapdrm/omap_encoder.c
*
* Copyright (C) 2011 Texas Instruments
* Author: Rob Clark <rob@ti.com>
*
* 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"
#include <linux/list.h>
/*
* encoder funcs
*/
#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
/* The encoder and connector both map to same dssdev.. the encoder
* handles the 'active' parts, ie. anything the modifies the state
* of the hw, and the connector handles the 'read-only' parts, like
* detecting connection and reading edid.
*/
struct omap_encoder {
struct drm_encoder base;
struct omap_dss_device *dssdev;
};
static void omap_encoder_destroy(struct drm_encoder *encoder)
{
struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
drm_encoder_cleanup(encoder);
kfree(omap_encoder);
}
static const struct drm_encoder_funcs omap_encoder_funcs = {
.destroy = omap_encoder_destroy,
};
/*
* The CRTC drm_crtc_helper_set_mode() doesn't really give us the right
* order.. the easiest way to work around this for now is to make all
* the encoder-helper's no-op's and have the omap_crtc code take care
* of the sequencing and call us in the right points.
*
* Eventually to handle connecting CRTCs to different encoders properly,
* either the CRTC helpers need to change or we need to replace
* drm_crtc_helper_set_mode(), but lets wait until atomic-modeset for
* that.
*/
static void omap_encoder_dpms(struct drm_encoder *encoder, int mode)
{
}
static bool omap_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
return true;
}
static void omap_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
}
static void omap_encoder_prepare(struct drm_encoder *encoder)
{
}
static void omap_encoder_commit(struct drm_encoder *encoder)
{
}
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,
};
/*
* Instead of relying on the helpers for modeset, the omap_crtc code
* calls these functions in the proper sequence.
*/
int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled)
{
struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
struct omap_dss_device *dssdev = omap_encoder->dssdev;
struct omap_dss_driver *dssdrv = dssdev->driver;
if (enabled) {
return dssdrv->enable(dssdev);
} else {
dssdrv->disable(dssdev);
return 0;
}
}
int omap_encoder_update(struct drm_encoder *encoder,
struct omap_overlay_manager *mgr,
struct omap_video_timings *timings)
{
struct drm_device *dev = encoder->dev;
struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
struct omap_dss_device *dssdev = omap_encoder->dssdev;
struct omap_dss_driver *dssdrv = dssdev->driver;
int ret;
dssdev->output->manager = mgr;
ret = dssdrv->check_timings(dssdev, timings);
if (ret) {
dev_err(dev->dev, "could not set timings: %d\n", ret);
return ret;
}
dssdrv->set_timings(dssdev, timings);
return 0;
}
/* initialize encoder */
struct drm_encoder *omap_encoder_init(struct drm_device *dev,
struct omap_dss_device *dssdev)
{
struct drm_encoder *encoder = NULL;
struct omap_encoder *omap_encoder;
omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
if (!omap_encoder) {
dev_err(dev->dev, "could not allocate encoder\n");
goto fail;
}
omap_encoder->dssdev = dssdev;
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);
return encoder;
fail:
if (encoder)
omap_encoder_destroy(encoder);
return NULL;
}
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