drivers/gpu/drm/exynos/exynos_drm_fb.c - kernel/mindspeed - Git at Google

 /* exynos_drm_fb.c
  *
  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
  * Authors:
  *	Inki Dae <inki.dae@samsung.com>
  *	Joonyoung Shim <jy0922.shim@samsung.com>
  *	Seung-Woo Kim <sw0312.kim@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.
  */

 #include "drmP.h"
 #include "drm_crtc.h"
 #include "drm_crtc_helper.h"
 #include "drm_fb_helper.h"

 #include "exynos_drm_drv.h"
 #include "exynos_drm_fb.h"
 #include "exynos_drm_buf.h"
 #include "exynos_drm_gem.h"

 #define to_exynos_fb(x)	container_of(x, struct exynos_drm_fb, fb)

 /*
  * exynos specific framebuffer structure.
  *
  * @fb: drm framebuffer obejct.
  * @exynos_gem_obj: exynos specific gem object containing a gem object.
  * @buffer: pointer to exynos_drm_gem_buffer object.
  *	- contain the memory information to memory region allocated
  *	at default framebuffer creation.
  */
 struct exynos_drm_fb {
 	struct drm_framebuffer		fb;
 	struct exynos_drm_gem_obj	*exynos_gem_obj;
 	struct exynos_drm_gem_buf	*buffer;
 };

 static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
 {
 	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);

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

 	drm_framebuffer_cleanup(fb);

 	/*
 	 * default framebuffer has no gem object so
 	 * a buffer of the default framebuffer should be released at here.
 	 */
 	if (!exynos_fb->exynos_gem_obj && exynos_fb->buffer)
 		exynos_drm_buf_destroy(fb->dev, exynos_fb->buffer);

 	kfree(exynos_fb);
 	exynos_fb = NULL;
 }

 static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
 					struct drm_file *file_priv,
 					unsigned int *handle)
 {
 	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);

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

 	return drm_gem_handle_create(file_priv,
 			&exynos_fb->exynos_gem_obj->base, handle);
 }

 static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
 				struct drm_file *file_priv, unsigned flags,
 				unsigned color, struct drm_clip_rect *clips,
 				unsigned num_clips)
 {
 	DRM_DEBUG_KMS("%s\n", __FILE__);

 	/* TODO */

 	return 0;
 }

 static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
 	.destroy	= exynos_drm_fb_destroy,
 	.create_handle	= exynos_drm_fb_create_handle,
 	.dirty		= exynos_drm_fb_dirty,
 };

 static struct drm_framebuffer *
 exynos_drm_fb_init(struct drm_file *file_priv, struct drm_device *dev,
 		    struct drm_mode_fb_cmd *mode_cmd)
 {
 	struct exynos_drm_fb *exynos_fb;
 	struct drm_framebuffer *fb;
 	struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
 	struct drm_gem_object *obj;
 	unsigned int size;
 	int ret;

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

 	mode_cmd->pitch = max(mode_cmd->pitch,
 			mode_cmd->width * (mode_cmd->bpp >> 3));

 	DRM_LOG_KMS("drm fb create(%dx%d)\n",
 			mode_cmd->width, mode_cmd->height);

 	exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
 	if (!exynos_fb) {
 		DRM_ERROR("failed to allocate exynos drm framebuffer.\n");
 		return ERR_PTR(-ENOMEM);
 	}

 	fb = &exynos_fb->fb;
 	ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
 	if (ret) {
 		DRM_ERROR("failed to initialize framebuffer.\n");
 		goto err_init;
 	}

 	DRM_LOG_KMS("create: fb id: %d\n", fb->base.id);

 	size = mode_cmd->pitch * mode_cmd->height;

 	/*
 	 * mode_cmd->handle could be NULL at booting time or
 	 * with user request. if NULL, a new buffer or a gem object
 	 * would be allocated.
 	 */
 	if (!mode_cmd->handle) {
 		if (!file_priv) {
 			struct exynos_drm_gem_buf *buffer;

 			/*
 			 * in case that file_priv is NULL, it allocates
 			 * only buffer and this buffer would be used
 			 * for default framebuffer.
 			 */
 			buffer = exynos_drm_buf_create(dev, size);
 			if (IS_ERR(buffer)) {
 				ret = PTR_ERR(buffer);
 				goto err_buffer;
 			}

 			exynos_fb->buffer = buffer;

 			DRM_LOG_KMS("default: dma_addr = 0x%lx, size = 0x%x\n",
 					(unsigned long)buffer->dma_addr, size);

 			goto out;
 		} else {
 			exynos_gem_obj = exynos_drm_gem_create(dev, file_priv,
 							&mode_cmd->handle,
 							size);
 			if (IS_ERR(exynos_gem_obj)) {
 				ret = PTR_ERR(exynos_gem_obj);
 				goto err_buffer;
 			}
 		}
 	} else {
 		obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
 		if (!obj) {
 			DRM_ERROR("failed to lookup gem object.\n");
 			goto err_buffer;
 		}

 		exynos_gem_obj = to_exynos_gem_obj(obj);

 		drm_gem_object_unreference_unlocked(obj);
 	}

 	/*
 	 * if got a exynos_gem_obj from either a handle or
 	 * a new creation then exynos_fb->exynos_gem_obj is NULL
 	 * so that default framebuffer has no its own gem object,
 	 * only its own buffer object.
 	 */
 	exynos_fb->buffer = exynos_gem_obj->buffer;

 	DRM_LOG_KMS("dma_addr = 0x%lx, size = 0x%x, gem object = 0x%x\n",
 			(unsigned long)exynos_fb->buffer->dma_addr, size,
 			(unsigned int)&exynos_gem_obj->base);

 out:
 	exynos_fb->exynos_gem_obj = exynos_gem_obj;

 	drm_helper_mode_fill_fb_struct(fb, mode_cmd);

 	return fb;

 err_buffer:
 	drm_framebuffer_cleanup(fb);

 err_init:
 	kfree(exynos_fb);

 	return ERR_PTR(ret);
 }

 struct drm_framebuffer *exynos_drm_fb_create(struct drm_device *dev,
 					      struct drm_file *file_priv,
 					      struct drm_mode_fb_cmd *mode_cmd)
 {
 	DRM_DEBUG_KMS("%s\n", __FILE__);

 	return exynos_drm_fb_init(file_priv, dev, mode_cmd);
 }

 struct exynos_drm_gem_buf *exynos_drm_fb_get_buf(struct drm_framebuffer *fb)
 {
 	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
 	struct exynos_drm_gem_buf *buffer;

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

 	buffer = exynos_fb->buffer;
 	if (!buffer)
 		return NULL;

 	DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n",
 			(unsigned long)buffer->kvaddr,
 			(unsigned long)buffer->dma_addr);

 	return buffer;
 }

 static void exynos_drm_output_poll_changed(struct drm_device *dev)
 {
 	struct exynos_drm_private *private = dev->dev_private;
 	struct drm_fb_helper *fb_helper = private->fb_helper;

 	if (fb_helper)
 		drm_fb_helper_hotplug_event(fb_helper);
 }

 static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
 	.fb_create = exynos_drm_fb_create,
 	.output_poll_changed = exynos_drm_output_poll_changed,
 };

 void exynos_drm_mode_config_init(struct drm_device *dev)
 {
 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;

 	/*
 	 * set max width and height as default value(4096x4096).
 	 * this value would be used to check framebuffer size limitation
 	 * at drm_mode_addfb().
 	 */
 	dev->mode_config.max_width = 4096;
 	dev->mode_config.max_height = 4096;

 	dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
 }

 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
 MODULE_DESCRIPTION("Samsung SoC DRM FB Driver");
 MODULE_LICENSE("GPL");
	/* exynos_drm_fb.c
	*
	* Copyright (c) 2011 Samsung Electronics Co., Ltd.
	* Authors:
	* Inki Dae <inki.dae@samsung.com>
	* Joonyoung Shim <jy0922.shim@samsung.com>
	* Seung-Woo Kim <sw0312.kim@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.
	*/

	#include "drmP.h"
	#include "drm_crtc.h"
	#include "drm_crtc_helper.h"
	#include "drm_fb_helper.h"

	#include "exynos_drm_drv.h"
	#include "exynos_drm_fb.h"
	#include "exynos_drm_buf.h"
	#include "exynos_drm_gem.h"

	#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)

	/*
	* exynos specific framebuffer structure.
	*
	* @fb: drm framebuffer obejct.
	* @exynos_gem_obj: exynos specific gem object containing a gem object.
	* @buffer: pointer to exynos_drm_gem_buffer object.
	* - contain the memory information to memory region allocated
	* at default framebuffer creation.
	*/
	struct exynos_drm_fb {
	struct drm_framebuffer fb;
	struct exynos_drm_gem_obj *exynos_gem_obj;
	struct exynos_drm_gem_buf *buffer;
	};

	static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
	{
	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);

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

	drm_framebuffer_cleanup(fb);

	/*
	* default framebuffer has no gem object so
	* a buffer of the default framebuffer should be released at here.
	*/
	if (!exynos_fb->exynos_gem_obj && exynos_fb->buffer)
	exynos_drm_buf_destroy(fb->dev, exynos_fb->buffer);

	kfree(exynos_fb);
	exynos_fb = NULL;
	}

	static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
	struct drm_file *file_priv,
	unsigned int *handle)
	{
	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);

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

	return drm_gem_handle_create(file_priv,
	&exynos_fb->exynos_gem_obj->base, handle);
	}

	static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
	struct drm_file *file_priv, unsigned flags,
	unsigned color, struct drm_clip_rect *clips,
	unsigned num_clips)
	{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* TODO */

	return 0;
	}

	static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
	.destroy = exynos_drm_fb_destroy,
	.create_handle = exynos_drm_fb_create_handle,
	.dirty = exynos_drm_fb_dirty,
	};

	static struct drm_framebuffer *
	exynos_drm_fb_init(struct drm_file file_priv, struct drm_device dev,
	struct drm_mode_fb_cmd *mode_cmd)
	{
	struct exynos_drm_fb *exynos_fb;
	struct drm_framebuffer *fb;
	struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
	struct drm_gem_object *obj;
	unsigned int size;
	int ret;

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

	mode_cmd->pitch = max(mode_cmd->pitch,
	mode_cmd->width * (mode_cmd->bpp >> 3));

	DRM_LOG_KMS("drm fb create(%dx%d)\n",
	mode_cmd->width, mode_cmd->height);

	exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
	if (!exynos_fb) {
	DRM_ERROR("failed to allocate exynos drm framebuffer.\n");
	return ERR_PTR(-ENOMEM);
	}

	fb = &exynos_fb->fb;
	ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
	if (ret) {
	DRM_ERROR("failed to initialize framebuffer.\n");
	goto err_init;
	}

	DRM_LOG_KMS("create: fb id: %d\n", fb->base.id);

	size = mode_cmd->pitch * mode_cmd->height;

	/*
	* mode_cmd->handle could be NULL at booting time or
	* with user request. if NULL, a new buffer or a gem object
	* would be allocated.
	*/
	if (!mode_cmd->handle) {
	if (!file_priv) {
	struct exynos_drm_gem_buf *buffer;

	/*
	* in case that file_priv is NULL, it allocates
	* only buffer and this buffer would be used
	* for default framebuffer.
	*/
	buffer = exynos_drm_buf_create(dev, size);
	if (IS_ERR(buffer)) {
	ret = PTR_ERR(buffer);
	goto err_buffer;
	}

	exynos_fb->buffer = buffer;

	DRM_LOG_KMS("default: dma_addr = 0x%lx, size = 0x%x\n",
	(unsigned long)buffer->dma_addr, size);

	goto out;
	} else {
	exynos_gem_obj = exynos_drm_gem_create(dev, file_priv,
	&mode_cmd->handle,
	size);
	if (IS_ERR(exynos_gem_obj)) {
	ret = PTR_ERR(exynos_gem_obj);
	goto err_buffer;
	}
	}
	} else {
	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
	if (!obj) {
	DRM_ERROR("failed to lookup gem object.\n");
	goto err_buffer;
	}

	exynos_gem_obj = to_exynos_gem_obj(obj);

	drm_gem_object_unreference_unlocked(obj);
	}

	/*
	* if got a exynos_gem_obj from either a handle or
	* a new creation then exynos_fb->exynos_gem_obj is NULL
	* so that default framebuffer has no its own gem object,
	* only its own buffer object.
	*/
	exynos_fb->buffer = exynos_gem_obj->buffer;

	DRM_LOG_KMS("dma_addr = 0x%lx, size = 0x%x, gem object = 0x%x\n",
	(unsigned long)exynos_fb->buffer->dma_addr, size,
	(unsigned int)&exynos_gem_obj->base);

	out:
	exynos_fb->exynos_gem_obj = exynos_gem_obj;

	drm_helper_mode_fill_fb_struct(fb, mode_cmd);

	return fb;

	err_buffer:
	drm_framebuffer_cleanup(fb);

	err_init:
	kfree(exynos_fb);

	return ERR_PTR(ret);
	}

	struct drm_framebuffer exynos_drm_fb_create(struct drm_device dev,
	struct drm_file *file_priv,
	struct drm_mode_fb_cmd *mode_cmd)
	{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	return exynos_drm_fb_init(file_priv, dev, mode_cmd);
	}

	struct exynos_drm_gem_buf exynos_drm_fb_get_buf(struct drm_framebuffer fb)
	{
	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
	struct exynos_drm_gem_buf *buffer;

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

	buffer = exynos_fb->buffer;
	if (!buffer)
	return NULL;

	DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n",
	(unsigned long)buffer->kvaddr,
	(unsigned long)buffer->dma_addr);

	return buffer;
	}

	static void exynos_drm_output_poll_changed(struct drm_device *dev)
	{
	struct exynos_drm_private *private = dev->dev_private;
	struct drm_fb_helper *fb_helper = private->fb_helper;

	if (fb_helper)
	drm_fb_helper_hotplug_event(fb_helper);
	}

	static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
	.fb_create = exynos_drm_fb_create,
	.output_poll_changed = exynos_drm_output_poll_changed,
	};

	void exynos_drm_mode_config_init(struct drm_device *dev)
	{
	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;

	/*
	* set max width and height as default value(4096x4096).
	* this value would be used to check framebuffer size limitation
	* at drm_mode_addfb().
	*/
	dev->mode_config.max_width = 4096;
	dev->mode_config.max_height = 4096;

	dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
	}

	MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
	MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
	MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
	MODULE_DESCRIPTION("Samsung SoC DRM FB Driver");
	MODULE_LICENSE("GPL");