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Commit 5c602531 authored by Laurent Pinchart's avatar Laurent Pinchart
Browse files

drm: rcar-du: Replace manual bridge implementation with DRM bridge 



The rcar-du driver contains a manual implementation of HDMI and VGA
bridges. Use DRM bridges to replace it.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
parent e947eccb

drivers/gpu/drm/rcar-du/Kconfig

+0 −6
Original line number Diff line number Diff line
@@ -11,12 +11,6 @@ config DRM_RCAR_DU 
	  Choose this option if you have an R-Car chipset.

	  If M is selected the module will be called rcar-du-drm.



config DRM_RCAR_HDMI

	bool "R-Car DU HDMI Encoder Support"

	depends on DRM_RCAR_DU

	help

	  Enable support for external HDMI encoders.



config DRM_RCAR_LVDS

	bool "R-Car DU LVDS Encoder Support"

	depends on DRM_RCAR_DU

drivers/gpu/drm/rcar-du/Makefile

+1 −4
Original line number Diff line number Diff line
@@ -4,10 +4,7 @@ rcar-du-drm-y := rcar_du_crtc.o \ 
		 rcar_du_group.o \

		 rcar_du_kms.o \

		 rcar_du_lvdscon.o \

		 rcar_du_plane.o \

		 rcar_du_vgacon.o



rcar-du-drm-$(CONFIG_DRM_RCAR_HDMI)	+= rcar_du_hdmienc.o

		 rcar_du_plane.o



rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS)	+= rcar_du_lvdsenc.o

drivers/gpu/drm/rcar-du/rcar_du_encoder.c

+59 −45
Original line number Diff line number Diff line
@@ -20,11 +20,9 @@ 


#include "rcar_du_drv.h"

#include "rcar_du_encoder.h"

#include "rcar_du_hdmienc.h"

#include "rcar_du_kms.h"

#include "rcar_du_lvdscon.h"

#include "rcar_du_lvdsenc.h"

#include "rcar_du_vgacon.h"



/* -----------------------------------------------------------------------------

 * Encoder
@@ -63,13 +61,15 @@ static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder, 
	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);

	struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;

	const struct drm_display_mode *mode = &crtc_state->mode;

	const struct drm_display_mode *panel_mode;

	struct drm_connector *connector = conn_state->connector;

	struct drm_device *dev = encoder->dev;



	/* DAC encoders have currently no restriction on the mode. */

	if (encoder->encoder_type == DRM_MODE_ENCODER_DAC)

		return 0;

	/*

	 * Only panel-related encoder types require validation here, everything

	 * else is handled by the bridge drivers.

	 */

	if (encoder->encoder_type == DRM_MODE_ENCODER_LVDS) {

		const struct drm_display_mode *panel_mode;



		if (list_empty(&connector->modes)) {

			dev_dbg(dev->dev, "encoder: empty modes list\n");
@@ -84,8 +84,12 @@ static int rcar_du_encoder_atomic_check(struct drm_encoder *encoder, 
		    mode->vdisplay != panel_mode->vdisplay)

			return -EINVAL;



	/* The flat panel mode is fixed, just copy it to the adjusted mode. */

		/*

		 * The flat panel mode is fixed, just copy it to the adjusted

		 * mode.

		 */

		drm_mode_copy(adjusted_mode, panel_mode);

	}



	if (renc->lvds)

		rcar_du_lvdsenc_atomic_check(renc->lvds, adjusted_mode);
@@ -159,6 +163,7 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu, 
{

	struct rcar_du_encoder *renc;

	struct drm_encoder *encoder;

	struct drm_bridge *bridge = NULL;

	unsigned int encoder_type;

	int ret;
@@ -182,6 +187,15 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu, 
		break;

	}



	if (enc_node) {

		/* Locate the DRM bridge from the encoder DT node. */

		bridge = of_drm_find_bridge(enc_node);

		if (!bridge) {

			ret = -EPROBE_DEFER;

			goto done;

		}

	}



	switch (type) {

	case RCAR_DU_ENCODER_VGA:

		encoder_type = DRM_MODE_ENCODER_DAC;
@@ -199,36 +213,36 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu, 
		break;

	}



	if (type == RCAR_DU_ENCODER_HDMI) {

		ret = rcar_du_hdmienc_init(rcdu, renc, enc_node);

		if (ret < 0)

			goto done;

	} else {

	ret = drm_encoder_init(rcdu->ddev, encoder, &encoder_funcs,

			       encoder_type, NULL);

	if (ret < 0)

		goto done;



	drm_encoder_helper_add(encoder, &encoder_helper_funcs);

	}



	switch (encoder_type) {

	case DRM_MODE_ENCODER_LVDS:

	if (bridge) {

		/*

		 * 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;

		}

	} else {

		/* There's no bridge, create the connector manually. */

		switch (output) {

		case RCAR_DU_OUTPUT_LVDS0:

		case RCAR_DU_OUTPUT_LVDS1:

			ret = rcar_du_lvds_connector_init(rcdu, renc, con_node);

			break;



	case DRM_MODE_ENCODER_DAC:

		ret = rcar_du_vga_connector_init(rcdu, renc);

		break;



	case DRM_MODE_ENCODER_TMDS:

		/* connector managed by the bridge driver */

		break;



		default:

			ret = -EINVAL;

			break;

		}

	}



done:

	if (ret < 0) {

drivers/gpu/drm/rcar-du/rcar_du_encoder.h

+0 −2
Original line number Diff line number Diff line
@@ -19,7 +19,6 @@ 


struct drm_panel;

struct rcar_du_device;

struct rcar_du_hdmienc;

struct rcar_du_lvdsenc;



enum rcar_du_encoder_type {
@@ -34,7 +33,6 @@ struct rcar_du_encoder { 
	struct drm_encoder base;

	enum rcar_du_output output;

	struct rcar_du_connector *connector;

	struct rcar_du_hdmienc *hdmi;

	struct rcar_du_lvdsenc *lvds;

};

drivers/gpu/drm/rcar-du/rcar_du_hdmienc.c

deleted100644 → 0
+0 −134
Original line number Diff line number Diff line 
/*

 * 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_crtc_state *crtc_state,

				     struct drm_connector_state *conn_state)

{

	struct rcar_du_hdmienc *hdmienc = to_rcar_hdmienc(encoder);



	rcar_du_crtc_route_output(crtc_state->crtc, hdmienc->renc->output);

}



static const struct drm_encoder_helper_funcs encoder_helper_funcs = {

	.atomic_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;

}