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Commit 637e6194 authored by Laurent Pinchart's avatar Laurent Pinchart
Browse files

drm: rcar-du: Add HDMI encoder and connector support 



SoCs that integrate the DU have no internal HDMI encoder, support
external encoders only.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
parent 69746b41

drivers/gpu/drm/rcar-du/Kconfig

+9 −2
Original line number Diff line number Diff line
@@ -11,10 +11,17 @@ 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

	depends on OF

	help

	  Enable support for external HDMI encoders.



config DRM_RCAR_LVDS

	bool "R-Car DU LVDS Encoder Support"

	depends on DRM_RCAR_DU

	depends on ARCH_R8A7790 || ARCH_R8A7791 || COMPILE_TEST

	help

	  Enable support the R-Car Display Unit embedded LVDS encoders

	  (currently only on R8A7790).
 
	  Enable support for the R-Car Display Unit embedded LVDS encoders

	  (currently only on R8A7790 and R8A7791).

drivers/gpu/drm/rcar-du/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -7,6 +7,8 @@ rcar-du-drm-y := rcar_du_crtc.o \ 
		 rcar_du_plane.o \

		 rcar_du_vgacon.o



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

					   rcar_du_hdmienc.o

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



obj-$(CONFIG_DRM_RCAR_DU)		+= rcar-du-drm.o

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

+25 −5
Original line number Diff line number Diff line
@@ -19,6 +19,8 @@ 


#include "rcar_du_drv.h"

#include "rcar_du_encoder.h"

#include "rcar_du_hdmicon.h"

#include "rcar_du_hdmienc.h"

#include "rcar_du_kms.h"

#include "rcar_du_lvdscon.h"

#include "rcar_du_lvdsenc.h"
@@ -177,6 +179,9 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu, 
	case RCAR_DU_ENCODER_LVDS:

		encoder_type = DRM_MODE_ENCODER_LVDS;

		break;

	case RCAR_DU_ENCODER_HDMI:

		encoder_type = DRM_MODE_ENCODER_TMDS;

		break;

	case RCAR_DU_ENCODER_NONE:

	default:

		/* No external encoder, use the internal encoder type. */
@@ -184,12 +189,24 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu, 
		break;

	}



	if (type == RCAR_DU_ENCODER_HDMI) {

		if (renc->lvds) {

			dev_err(rcdu->dev,

				"Chaining LVDS and HDMI encoders not supported\n");

			return -EINVAL;

		}



		ret = rcar_du_hdmienc_init(rcdu, renc, enc_node);

		if (ret < 0)

			return ret;

	} else {

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

				       encoder_type);

		if (ret < 0)

			return ret;



		drm_encoder_helper_add(encoder, &encoder_helper_funcs);

	}



	switch (encoder_type) {

	case DRM_MODE_ENCODER_LVDS:
@@ -198,6 +215,9 @@ int rcar_du_encoder_init(struct rcar_du_device *rcdu, 
	case DRM_MODE_ENCODER_DAC:

		return rcar_du_vga_connector_init(rcdu, renc);



	case DRM_MODE_ENCODER_TMDS:

		return rcar_du_hdmi_connector_init(rcdu, renc);



	default:

		return -EINVAL;

	}

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

+3 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <drm/drm_encoder_slave.h>



struct rcar_du_device;

struct rcar_du_hdmienc;

struct rcar_du_lvdsenc;



enum rcar_du_encoder_type {
@@ -25,11 +26,13 @@ enum rcar_du_encoder_type { 
	RCAR_DU_ENCODER_NONE,

	RCAR_DU_ENCODER_VGA,

	RCAR_DU_ENCODER_LVDS,

	RCAR_DU_ENCODER_HDMI,

};



struct rcar_du_encoder {

	struct drm_encoder_slave slave;

	enum rcar_du_output output;

	struct rcar_du_hdmienc *hdmi;

	struct rcar_du_lvdsenc *lvds;

};

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

0 → 100644
+118 −0
Original line number Diff line number Diff line 
/*

 * R-Car Display Unit HDMI Connector

 *

 * 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 <drm/drmP.h>

#include <drm/drm_crtc.h>

#include <drm/drm_crtc_helper.h>

#include <drm/drm_encoder_slave.h>



#include "rcar_du_drv.h"

#include "rcar_du_encoder.h"

#include "rcar_du_hdmicon.h"

#include "rcar_du_kms.h"



#define to_slave_funcs(e)	(to_rcar_encoder(e)->slave.slave_funcs)



static int rcar_du_hdmi_connector_get_modes(struct drm_connector *connector)

{

	struct drm_encoder *encoder = connector->encoder;

	struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);



	if (sfuncs->get_modes == NULL)

		return 0;



	return sfuncs->get_modes(encoder, connector);

}



static int rcar_du_hdmi_connector_mode_valid(struct drm_connector *connector,

					     struct drm_display_mode *mode)

{

	struct drm_encoder *encoder = connector->encoder;

	struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);



	if (sfuncs->mode_valid == NULL)

		return MODE_OK;



	return sfuncs->mode_valid(encoder, mode);

}



static const struct drm_connector_helper_funcs connector_helper_funcs = {

	.get_modes = rcar_du_hdmi_connector_get_modes,

	.mode_valid = rcar_du_hdmi_connector_mode_valid,

	.best_encoder = rcar_du_connector_best_encoder,

};



static void rcar_du_hdmi_connector_destroy(struct drm_connector *connector)

{

	drm_connector_unregister(connector);

	drm_connector_cleanup(connector);

}



static enum drm_connector_status

rcar_du_hdmi_connector_detect(struct drm_connector *connector, bool force)

{

	struct drm_encoder *encoder = connector->encoder;

	struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);



	if (sfuncs->detect == NULL)

		return connector_status_unknown;



	return sfuncs->detect(encoder, connector);

}



static const struct drm_connector_funcs connector_funcs = {

	.dpms = drm_helper_connector_dpms,

	.detect = rcar_du_hdmi_connector_detect,

	.fill_modes = drm_helper_probe_single_connector_modes,

	.destroy = rcar_du_hdmi_connector_destroy,

};



int rcar_du_hdmi_connector_init(struct rcar_du_device *rcdu,

				struct rcar_du_encoder *renc)

{

	struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);

	struct rcar_du_connector *rcon;

	struct drm_connector *connector;

	int ret;



	rcon = devm_kzalloc(rcdu->dev, sizeof(*rcon), GFP_KERNEL);

	if (rcon == NULL)

		return -ENOMEM;



	connector = &rcon->connector;

	connector->display_info.width_mm = 0;

	connector->display_info.height_mm = 0;



	ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,

				 DRM_MODE_CONNECTOR_HDMIA);

	if (ret < 0)

		return ret;



	drm_connector_helper_add(connector, &connector_helper_funcs);

	ret = drm_connector_register(connector);

	if (ret < 0)

		return ret;



	drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);

	drm_object_property_set_value(&connector->base,

		rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);



	ret = drm_mode_connector_attach_encoder(connector, encoder);

	if (ret < 0)

		return ret;



	connector->encoder = encoder;

	rcon->encoder = renc;



	return 0;

}