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/*
* rcar_du_lvds.c -- R-Car Display Unit LVDS Encoder
*
* Copyright (C) 2013 Renesas Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include "rcar_du_drv.h"
#include "rcar_du_kms.h"
#include "rcar_du_lvds.h"
#include "rcar_du_lvdscon.h"
static void rcar_du_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
{
}
static bool rcar_du_lvds_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
const struct drm_display_mode *panel_mode;
struct drm_device *dev = encoder->dev;
struct drm_connector *connector;
bool found = false;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->encoder == encoder) {
found = true;
break;
}
}
if (!found) {
dev_dbg(dev->dev, "mode_fixup: no connector found\n");
return false;
}
if (list_empty(&connector->modes)) {
dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
return false;
}
panel_mode = list_first_entry(&connector->modes,
struct drm_display_mode, head);
/* We're not allowed to modify the resolution. */
if (mode->hdisplay != panel_mode->hdisplay ||
mode->vdisplay != panel_mode->vdisplay)
return false;
/* The flat panel mode is fixed, just copy it to the adjusted mode. */
drm_mode_copy(adjusted_mode, panel_mode);
return true;
}
static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
.dpms = rcar_du_lvds_encoder_dpms,
.mode_fixup = rcar_du_lvds_encoder_mode_fixup,
.prepare = rcar_du_encoder_mode_prepare,
.commit = rcar_du_encoder_mode_commit,
.mode_set = rcar_du_encoder_mode_set,
};
static const struct drm_encoder_funcs encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
int rcar_du_lvds_init(struct rcar_du_device *rcdu,
const struct rcar_du_encoder_lvds_data *data,
unsigned int output)
{
struct rcar_du_encoder *renc;
int ret;
renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
if (renc == NULL)
return -ENOMEM;
renc->output = output;
ret = drm_encoder_init(rcdu->ddev, &renc->encoder, &encoder_funcs,
DRM_MODE_ENCODER_LVDS);
if (ret < 0)
return ret;
drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
return rcar_du_lvds_connector_init(rcdu, renc, &data->panel);
}
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