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/*
* R-Car Display Unit HDMI Encoder
*
* Copyright (C) 2014 Renesas Electronics 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 <linux/slab.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
#include "rcar_du_hdmienc.h"
#include "rcar_du_lvdsenc.h"
struct rcar_du_hdmienc {
struct rcar_du_encoder *renc;
bool enabled;
};
#define to_rcar_hdmienc(e) (to_rcar_encoder(e)->hdmi)
static void rcar_du_hdmienc_disable(struct drm_encoder *encoder)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
if (hdmienc->renc->lvds)
rcar_du_lvdsenc_enable(hdmienc->renc->lvds, encoder->crtc,
false);
hdmienc->enabled = false;
}
static void rcar_du_hdmienc_enable(struct drm_encoder *encoder)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
if (hdmienc->renc->lvds)
rcar_du_lvdsenc_enable(hdmienc->renc->lvds, encoder->crtc,
true);
hdmienc->enabled = true;
}
static int rcar_du_hdmienc_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
if (hdmienc->renc->lvds)
rcar_du_lvdsenc_atomic_check(hdmienc->renc->lvds,
adjusted_mode);
return 0;
}
static void rcar_du_hdmienc_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
rcar_du_crtc_route_output(encoder->crtc, hdmienc->renc->output);
}
static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
.mode_set = rcar_du_hdmienc_mode_set,
.disable = rcar_du_hdmienc_disable,
.enable = rcar_du_hdmienc_enable,
.atomic_check = rcar_du_hdmienc_atomic_check,
};
static void rcar_du_hdmienc_cleanup(struct drm_encoder *encoder)
{
struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);
if (hdmienc->enabled)
rcar_du_hdmienc_disable(encoder);
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs encoder_funcs = {
.destroy = rcar_du_hdmienc_cleanup,
};
int rcar_du_hdmienc_init(struct rcar_du_device *rcdu,
struct rcar_du_encoder *renc, struct device_node *np)
{
struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
struct drm_bridge *bridge;
struct rcar_du_hdmienc *hdmienc;
int ret;
hdmienc = devm_kzalloc(rcdu->dev, sizeof(*hdmienc), GFP_KERNEL);
if (hdmienc == NULL)
return -ENOMEM;
/* Locate the DRM bridge from the HDMI encoder DT node. */
bridge = of_drm_find_bridge(np);
if (!bridge)
return -EPROBE_DEFER;
ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
if (ret < 0)
return ret;
drm_encoder_helper_add(encoder, &encoder_helper_funcs);
renc->hdmi = hdmienc;
hdmienc->renc = renc;
/* Link the bridge to the encoder. */
ret = drm_bridge_attach(encoder, bridge, NULL);
if (ret) {
drm_encoder_cleanup(encoder);
return ret;
}
return 0;
}
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