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Commit d8408326 authored by Seung-Woo Kim's avatar Seung-Woo Kim Committed by Inki Dae
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drm/exynos: added hdmi display support 

This patch is hdmi display support for exynos drm driver.

There is already v4l2 based exynos hdmi driver in drivers/media/video/s5p-tv
and some low level code is already in s5p-tv and even headers for register
define are almost same. but in this patch, we decide not to consider separated
common code with s5p-tv.

Exynos HDMI is composed of 5 blocks, mixer, vp, hdmi, hdmiphy and ddc.

1. mixer. The piece of hardware responsible for mixing and blending multiple
data inputs before passing it to an output device.  The mixer is capable of
handling up to three image layers. One is the output of VP.  Other two are
images in RGB format.  The blending factor, and layers' priority are controlled
by mixer's registers. The output is passed to HDMI.

2. vp (video processor). It is used for processing of NV12/NV21 data.  An image
stored in RAM is accessed by DMA. The output in YCbCr444 format is send to
mixer.

3. hdmi. The piece of HW responsible for generation of HDMI packets. It takes
pixel data from mixer and transforms it into data frames. The output is send
to HDMIPHY interface.

4. hdmiphy. Physical interface for HDMI. Its duties are sending HDMI packets to
HDMI connector. Basically, it contains a PLL that produces source clock for
mixer, vp and hdmi.

5. ddc (display data channel). It is dedicated i2c channel to exchange display
information as edid with display monitor.

With plane support, exynos hdmi driver fully supports two mixer layes and vp
layer. Also vp layer supports multi buffer plane pixel formats having non
contigus memory spaces.

In exynos drm driver, common drm_hdmi driver to interface with drm framework
has opertion pointers for mixer and hdmi. this drm_hdmi driver is registered as
sub driver of exynos_drm. hdmi has hdmiphy and ddc i2c clients and controls
them. mixer controls all overlay layers in both mixer and vp.

Vblank interrupts for hdmi are handled by mixer internally because drm
framework cannot support multiple irq id. And pipe number is used to check
which display device irq happens.

History
v2: this version
 - drm plane feature support to handle overlay layers.
 - multi buffer plane pixel format support for vp layer.
 - vp layer support

RFCv1: original
 - at https://lkml.org/lkml/2011/11/4/164



Signed-off-by: default avatarSeung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
Signed-off-by: default avatarJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
parent c32b06ef

drivers/gpu/drm/exynos/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -18,3 +18,10 @@ config DRM_EXYNOS_FIMD 
	help

	  Choose this option if you want to use Exynos FIMD for DRM.

	  If M is selected, the module will be called exynos_drm_fimd



config DRM_EXYNOS_HDMI

	tristate "Exynos DRM HDMI"

	depends on DRM_EXYNOS

	help

	  Choose this option if you want to use Exynos HDMI for DRM.

	  If M is selected, the module will be called exynos_drm_hdmi

drivers/gpu/drm/exynos/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -10,3 +10,5 @@ exynosdrm-y := exynos_drm_drv.o exynos_drm_encoder.o exynos_drm_connector.o \ 


obj-$(CONFIG_DRM_EXYNOS) += exynosdrm.o

obj-$(CONFIG_DRM_EXYNOS_FIMD) += exynos_drm_fimd.o

obj-$(CONFIG_DRM_EXYNOS_HDMI) += exynos_hdmi.o exynos_mixer.o exynos_ddc.o \

				 exynos_hdmiphy.o exynos_drm_hdmi.o

drivers/gpu/drm/exynos/exynos_ddc.c

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+58 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2011 Samsung Electronics Co.Ltd

 * Authors:

 *	Seung-Woo Kim <sw0312.kim@samsung.com>

 *	Inki Dae <inki.dae@samsung.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 "drmP.h"



#include <linux/kernel.h>

#include <linux/i2c.h>

#include <linux/module.h>





#include "exynos_drm_drv.h"

#include "exynos_hdmi.h"



static int s5p_ddc_probe(struct i2c_client *client,

			const struct i2c_device_id *dev_id)

{

	hdmi_attach_ddc_client(client);



	dev_info(&client->adapter->dev, "attached s5p_ddc "

		"into i2c adapter successfully\n");



	return 0;

}



static int s5p_ddc_remove(struct i2c_client *client)

{

	dev_info(&client->adapter->dev, "detached s5p_ddc "

		"from i2c adapter successfully\n");



	return 0;

}



static struct i2c_device_id ddc_idtable[] = {

	{"s5p_ddc", 0},

	{ },

};



struct i2c_driver ddc_driver = {

	.driver = {

		.name = "s5p_ddc",

		.owner = THIS_MODULE,

	},

	.id_table	= ddc_idtable,

	.probe		= s5p_ddc_probe,

	.remove		= __devexit_p(s5p_ddc_remove),

	.command		= NULL,

};

EXPORT_SYMBOL(ddc_driver);

drivers/gpu/drm/exynos/exynos_drm_hdmi.c

0 → 100644
+439 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2011 Samsung Electronics Co.Ltd

 * Authors:

 *	Inki Dae <inki.dae@samsung.com>

 *	Seung-Woo Kim <sw0312.kim@samsung.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 "drmP.h"



#include <linux/kernel.h>

#include <linux/wait.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>



#include <drm/exynos_drm.h>



#include "exynos_drm_drv.h"

#include "exynos_drm_hdmi.h"



#define to_context(dev)		platform_get_drvdata(to_platform_device(dev))

#define to_subdrv(dev)		to_context(dev)

#define get_ctx_from_subdrv(subdrv)	container_of(subdrv,\

					struct drm_hdmi_context, subdrv);



/* these callback points shoud be set by specific drivers. */

static struct exynos_hdmi_display_ops *hdmi_display_ops;

static struct exynos_hdmi_manager_ops *hdmi_manager_ops;

static struct exynos_hdmi_overlay_ops *hdmi_overlay_ops;



struct drm_hdmi_context {

	struct exynos_drm_subdrv	subdrv;

	struct exynos_drm_hdmi_context	*hdmi_ctx;

	struct exynos_drm_hdmi_context	*mixer_ctx;

	struct work_struct		work;

};



void exynos_drm_display_ops_register(struct exynos_hdmi_display_ops

					*display_ops)

{

	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (display_ops)

		hdmi_display_ops = display_ops;

}

EXPORT_SYMBOL(exynos_drm_display_ops_register);



void exynos_drm_manager_ops_register(struct exynos_hdmi_manager_ops

					*manager_ops)

{

	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (manager_ops)

		hdmi_manager_ops = manager_ops;

}

EXPORT_SYMBOL(exynos_drm_manager_ops_register);



void exynos_drm_overlay_ops_register(struct exynos_hdmi_overlay_ops

					*overlay_ops)

{

	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (overlay_ops)

		hdmi_overlay_ops = overlay_ops;

}

EXPORT_SYMBOL(exynos_drm_overlay_ops_register);



static bool drm_hdmi_is_connected(struct device *dev)

{

	struct drm_hdmi_context *ctx = to_context(dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_display_ops && hdmi_display_ops->is_connected)

		return hdmi_display_ops->is_connected(ctx->hdmi_ctx->ctx);



	return false;

}



static int drm_hdmi_get_edid(struct device *dev,

		struct drm_connector *connector, u8 *edid, int len)

{

	struct drm_hdmi_context *ctx = to_context(dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_display_ops && hdmi_display_ops->get_edid)

		return hdmi_display_ops->get_edid(ctx->hdmi_ctx->ctx,

				connector, edid, len);



	return 0;

}



static int drm_hdmi_check_timing(struct device *dev, void *timing)

{

	struct drm_hdmi_context *ctx = to_context(dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_display_ops && hdmi_display_ops->check_timing)

		return hdmi_display_ops->check_timing(ctx->hdmi_ctx->ctx,

				timing);



	return 0;

}



static int drm_hdmi_power_on(struct device *dev, int mode)

{

	struct drm_hdmi_context *ctx = to_context(dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_display_ops && hdmi_display_ops->power_on)

		return hdmi_display_ops->power_on(ctx->hdmi_ctx->ctx, mode);



	return 0;

}



static struct exynos_drm_display_ops drm_hdmi_display_ops = {

	.type = EXYNOS_DISPLAY_TYPE_HDMI,

	.is_connected = drm_hdmi_is_connected,

	.get_edid = drm_hdmi_get_edid,

	.check_timing = drm_hdmi_check_timing,

	.power_on = drm_hdmi_power_on,

};



static int drm_hdmi_enable_vblank(struct device *subdrv_dev)

{

	struct drm_hdmi_context *ctx = to_context(subdrv_dev);

	struct exynos_drm_subdrv *subdrv = &ctx->subdrv;

	struct exynos_drm_manager *manager = &subdrv->manager;



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_overlay_ops && hdmi_overlay_ops->enable_vblank)

		return hdmi_overlay_ops->enable_vblank(ctx->mixer_ctx->ctx,

							manager->pipe);



	return 0;

}



static void drm_hdmi_disable_vblank(struct device *subdrv_dev)

{

	struct drm_hdmi_context *ctx = to_context(subdrv_dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_overlay_ops && hdmi_overlay_ops->disable_vblank)

		return hdmi_overlay_ops->disable_vblank(ctx->mixer_ctx->ctx);

}



static void drm_hdmi_mode_set(struct device *subdrv_dev, void *mode)

{

	struct drm_hdmi_context *ctx = to_context(subdrv_dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_manager_ops && hdmi_manager_ops->mode_set)

		hdmi_manager_ops->mode_set(ctx->hdmi_ctx->ctx, mode);

}



static void drm_hdmi_commit(struct device *subdrv_dev)

{

	struct drm_hdmi_context *ctx = to_context(subdrv_dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_manager_ops && hdmi_manager_ops->commit)

		hdmi_manager_ops->commit(ctx->hdmi_ctx->ctx);

}



static void drm_hdmi_dpms(struct device *subdrv_dev, int mode)

{

	struct drm_hdmi_context *ctx = to_context(subdrv_dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	switch (mode) {

	case DRM_MODE_DPMS_ON:

		break;

	case DRM_MODE_DPMS_STANDBY:

	case DRM_MODE_DPMS_SUSPEND:

	case DRM_MODE_DPMS_OFF:

		if (hdmi_manager_ops && hdmi_manager_ops->disable)

			hdmi_manager_ops->disable(ctx->hdmi_ctx->ctx);

		break;

	default:

		DRM_DEBUG_KMS("unkown dps mode: %d\n", mode);

		break;

	}

}



static struct exynos_drm_manager_ops drm_hdmi_manager_ops = {

	.dpms = drm_hdmi_dpms,

	.enable_vblank = drm_hdmi_enable_vblank,

	.disable_vblank = drm_hdmi_disable_vblank,

	.mode_set = drm_hdmi_mode_set,

	.commit = drm_hdmi_commit,

};



static void drm_mixer_mode_set(struct device *subdrv_dev,

		struct exynos_drm_overlay *overlay)

{

	struct drm_hdmi_context *ctx = to_context(subdrv_dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_overlay_ops && hdmi_overlay_ops->win_mode_set)

		hdmi_overlay_ops->win_mode_set(ctx->mixer_ctx->ctx, overlay);

}



static void drm_mixer_commit(struct device *subdrv_dev, int zpos)

{

	struct drm_hdmi_context *ctx = to_context(subdrv_dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_overlay_ops && hdmi_overlay_ops->win_commit)

		hdmi_overlay_ops->win_commit(ctx->mixer_ctx->ctx, zpos);

}



static void drm_mixer_disable(struct device *subdrv_dev, int zpos)

{

	struct drm_hdmi_context *ctx = to_context(subdrv_dev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	if (hdmi_overlay_ops && hdmi_overlay_ops->win_disable)

		hdmi_overlay_ops->win_disable(ctx->mixer_ctx->ctx, zpos);

}



static struct exynos_drm_overlay_ops drm_hdmi_overlay_ops = {

	.mode_set = drm_mixer_mode_set,

	.commit = drm_mixer_commit,

	.disable = drm_mixer_disable,

};





static int hdmi_subdrv_probe(struct drm_device *drm_dev,

		struct device *dev)

{

	struct exynos_drm_subdrv *subdrv = to_subdrv(dev);

	struct drm_hdmi_context *ctx;

	struct platform_device *pdev = to_platform_device(dev);

	struct exynos_drm_common_hdmi_pd *pd;

	int ret;



	DRM_DEBUG_KMS("%s\n", __FILE__);



	pd = pdev->dev.platform_data;



	if (!pd) {

		DRM_DEBUG_KMS("platform data is null.\n");

		return -EFAULT;

	}



	if (!pd->hdmi_dev) {

		DRM_DEBUG_KMS("hdmi device is null.\n");

		return -EFAULT;

	}



	if (!pd->mixer_dev) {

		DRM_DEBUG_KMS("mixer device is null.\n");

		return -EFAULT;

	}



	ret = platform_driver_register(&hdmi_driver);

	if (ret) {

		DRM_DEBUG_KMS("failed to register hdmi driver.\n");

		return ret;

	}



	ret = platform_driver_register(&mixer_driver);

	if (ret) {

		DRM_DEBUG_KMS("failed to register mixer driver.\n");

		goto err_hdmidrv;

	}



	ctx = get_ctx_from_subdrv(subdrv);



	ctx->hdmi_ctx = (struct exynos_drm_hdmi_context *)

				to_context(pd->hdmi_dev);

	if (!ctx->hdmi_ctx) {

		DRM_DEBUG_KMS("hdmi context is null.\n");

		ret = -EFAULT;

		goto err_mixerdrv;

	}



	ctx->hdmi_ctx->drm_dev = drm_dev;



	ctx->mixer_ctx = (struct exynos_drm_hdmi_context *)

				to_context(pd->mixer_dev);

	if (!ctx->mixer_ctx) {

		DRM_DEBUG_KMS("mixer context is null.\n");

		ret = -EFAULT;

		goto err_mixerdrv;

	}



	ctx->mixer_ctx->drm_dev = drm_dev;



	return 0;



err_mixerdrv:

	platform_driver_unregister(&mixer_driver);

err_hdmidrv:

	platform_driver_unregister(&hdmi_driver);

	return ret;

}



static void hdmi_subdrv_remove(struct drm_device *drm_dev)

{

	DRM_DEBUG_KMS("%s\n", __FILE__);



	platform_driver_unregister(&hdmi_driver);

	platform_driver_unregister(&mixer_driver);

}



static void exynos_drm_hdmi_late_probe(struct work_struct *work)

{

	struct drm_hdmi_context *ctx = container_of(work,

				struct drm_hdmi_context, work);



	/*

	 * this function calls subdrv->probe() so this must be called

	 * after probe context.

	 *

	 * PS. subdrv->probe() will call platform_driver_register() to probe

	 * hdmi and mixer driver.

	 */

	exynos_drm_subdrv_register(&ctx->subdrv);

}



static int __devinit exynos_drm_hdmi_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct exynos_drm_subdrv *subdrv;

	struct drm_hdmi_context *ctx;



	DRM_DEBUG_KMS("%s\n", __FILE__);



	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);

	if (!ctx) {

		DRM_LOG_KMS("failed to alloc common hdmi context.\n");

		return -ENOMEM;

	}



	subdrv = &ctx->subdrv;



	subdrv->probe = hdmi_subdrv_probe;

	subdrv->remove = hdmi_subdrv_remove;

	subdrv->manager.pipe = -1;

	subdrv->manager.ops = &drm_hdmi_manager_ops;

	subdrv->manager.overlay_ops = &drm_hdmi_overlay_ops;

	subdrv->manager.display_ops = &drm_hdmi_display_ops;

	subdrv->manager.dev = dev;



	platform_set_drvdata(pdev, subdrv);



	INIT_WORK(&ctx->work, exynos_drm_hdmi_late_probe);



	schedule_work(&ctx->work);



	return 0;

}



static int hdmi_runtime_suspend(struct device *dev)

{

	DRM_DEBUG_KMS("%s\n", __FILE__);



	return 0;

}



static int hdmi_runtime_resume(struct device *dev)

{

	DRM_DEBUG_KMS("%s\n", __FILE__);



	return 0;

}



static const struct dev_pm_ops hdmi_pm_ops = {

	.runtime_suspend = hdmi_runtime_suspend,

	.runtime_resume	 = hdmi_runtime_resume,

};



static int __devexit exynos_drm_hdmi_remove(struct platform_device *pdev)

{

	struct drm_hdmi_context *ctx = platform_get_drvdata(pdev);



	DRM_DEBUG_KMS("%s\n", __FILE__);



	exynos_drm_subdrv_unregister(&ctx->subdrv);

	kfree(ctx);



	return 0;

}



static struct platform_driver exynos_drm_common_hdmi_driver = {

	.probe		= exynos_drm_hdmi_probe,

	.remove		= __devexit_p(exynos_drm_hdmi_remove),

	.driver		= {

		.name	= "exynos-drm-hdmi",

		.owner	= THIS_MODULE,

		.pm = &hdmi_pm_ops,

	},

};



static int __init exynos_drm_hdmi_init(void)

{

	int ret;



	DRM_DEBUG_KMS("%s\n", __FILE__);



	ret = platform_driver_register(&exynos_drm_common_hdmi_driver);

	if (ret) {

		DRM_DEBUG_KMS("failed to register hdmi common driver.\n");

		return ret;

	}



	return ret;

}



static void __exit exynos_drm_hdmi_exit(void)

{

	platform_driver_unregister(&exynos_drm_common_hdmi_driver);

}



module_init(exynos_drm_hdmi_init);

module_exit(exynos_drm_hdmi_exit);



MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");

MODULE_AUTHOR("Seung-Woo Kim, <sw0312.kim@samsung.com>");

MODULE_DESCRIPTION("Samsung SoC DRM HDMI Driver");

MODULE_LICENSE("GPL");

drivers/gpu/drm/exynos/exynos_drm_hdmi.h

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+73 −0
Original line number Diff line number Diff line 
/* exynos_drm_hdmi.h

 *

 * Copyright (c) 2011 Samsung Electronics Co., Ltd.

 * Authoer: Inki Dae <inki.dae@samsung.com>

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice (including the next

 * paragraph) shall be included in all copies or substantial portions of the

 * Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 */



#ifndef _EXYNOS_DRM_HDMI_H_

#define _EXYNOS_DRM_HDMI_H_



/*

 * exynos hdmi common context structure.

 *

 * @drm_dev: pointer to drm_device.

 * @ctx: pointer to the context of specific device driver.

 *	this context should be hdmi_context or mixer_context.

 */

struct exynos_drm_hdmi_context {

	struct drm_device	*drm_dev;

	void			*ctx;

};



struct exynos_hdmi_display_ops {

	bool (*is_connected)(void *ctx);

	int (*get_edid)(void *ctx, struct drm_connector *connector,

			u8 *edid, int len);

	int (*check_timing)(void *ctx, void *timing);

	int (*power_on)(void *ctx, int mode);

};



struct exynos_hdmi_manager_ops {

	void (*mode_set)(void *ctx, void *mode);

	void (*commit)(void *ctx);

	void (*disable)(void *ctx);

};



struct exynos_hdmi_overlay_ops {

	int (*enable_vblank)(void *ctx, int pipe);

	void (*disable_vblank)(void *ctx);

	void (*win_mode_set)(void *ctx, struct exynos_drm_overlay *overlay);

	void (*win_commit)(void *ctx, int zpos);

	void (*win_disable)(void *ctx, int zpos);

};



extern struct platform_driver hdmi_driver;

extern struct platform_driver mixer_driver;



void exynos_drm_display_ops_register(struct exynos_hdmi_display_ops

					*display_ops);

void exynos_drm_manager_ops_register(struct exynos_hdmi_manager_ops

					*manager_ops);

void exynos_drm_overlay_ops_register(struct exynos_hdmi_overlay_ops

					*overlay_ops);



#endif