a6cc417d3e
On the D3 and E3 SoCs the LVDS PLL clock output provides the dot clock to the DU channels, even when the LVDS outputs are not in use. Enable and disable the LVDS clock output when enabling or disabling a CRTC connected to the DPAD0 output. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* rcar_du_encoder.c -- R-Car Display Unit Encoder
|
|
*
|
|
* Copyright (C) 2013-2014 Renesas Electronics Corporation
|
|
*
|
|
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
|
|
#include <drm/drm_crtc.h>
|
|
#include <drm/drm_modeset_helper_vtables.h>
|
|
#include <drm/drm_panel.h>
|
|
|
|
#include "rcar_du_drv.h"
|
|
#include "rcar_du_encoder.h"
|
|
#include "rcar_du_kms.h"
|
|
|
|
/* -----------------------------------------------------------------------------
|
|
* Encoder
|
|
*/
|
|
|
|
static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
|
|
};
|
|
|
|
static const struct drm_encoder_funcs encoder_funcs = {
|
|
.destroy = drm_encoder_cleanup,
|
|
};
|
|
|
|
int rcar_du_encoder_init(struct rcar_du_device *rcdu,
|
|
enum rcar_du_output output,
|
|
struct device_node *enc_node)
|
|
{
|
|
struct rcar_du_encoder *renc;
|
|
struct drm_encoder *encoder;
|
|
struct drm_bridge *bridge = NULL;
|
|
int ret;
|
|
|
|
renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
|
|
if (renc == NULL)
|
|
return -ENOMEM;
|
|
|
|
rcdu->encoders[output] = renc;
|
|
renc->output = output;
|
|
encoder = rcar_encoder_to_drm_encoder(renc);
|
|
|
|
dev_dbg(rcdu->dev, "initializing encoder %pOF for output %u\n",
|
|
enc_node, output);
|
|
|
|
/* Locate the DRM bridge from the encoder DT node. */
|
|
bridge = of_drm_find_bridge(enc_node);
|
|
if (!bridge) {
|
|
ret = -EPROBE_DEFER;
|
|
goto done;
|
|
}
|
|
|
|
ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,
|
|
DRM_MODE_ENCODER_NONE, NULL);
|
|
if (ret < 0)
|
|
goto done;
|
|
|
|
drm_encoder_helper_add(encoder, &encoder_helper_funcs);
|
|
|
|
/*
|
|
* Attach the bridge to the encoder. The bridge will create the
|
|
* connector.
|
|
*/
|
|
ret = drm_bridge_attach(encoder, bridge, NULL);
|
|
if (ret) {
|
|
drm_encoder_cleanup(encoder);
|
|
return ret;
|
|
}
|
|
|
|
done:
|
|
if (ret < 0) {
|
|
if (encoder->name)
|
|
encoder->funcs->destroy(encoder);
|
|
devm_kfree(rcdu->dev, renc);
|
|
}
|
|
|
|
return ret;
|
|
}
|