[mirror_ubuntu-artful-kernel.git] / drivers / gpu / drm / exynos / exynos_drm_fb.c

/* 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 "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.
 * @entry: pointer to exynos drm buffer entry object.
 *	- containing only the information to physically continuous 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_buf_entry	*entry;
};

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->entry)
		exynos_drm_buf_destroy(fb->dev, exynos_fb->entry);

	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_buf_entry *entry;

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

			exynos_fb->entry = entry;

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

			goto out;
		} else {
			exynos_gem_obj = exynos_drm_gem_create(file_priv, dev,
							size,
							&mode_cmd->handle);
			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->entry = exynos_gem_obj->entry;

	DRM_LOG_KMS("paddr = 0x%lx, size = 0x%x, gem object = 0x%x\n",
			(unsigned long)exynos_fb->entry->paddr, 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_buf_entry *exynos_drm_fb_get_buf(struct drm_framebuffer *fb)
{
	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
	struct exynos_drm_buf_entry *entry;

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

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

	DRM_DEBUG_KMS("vaddr = 0x%lx, paddr = 0x%lx\n",
			(unsigned long)entry->vaddr,
			(unsigned long)entry->paddr);

	return entry;
}

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

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");
Commit	Line	Data
1c248b7d ID	1	/* exynos_drm_fb.c
	2	*
	3	* Copyright (c) 2011 Samsung Electronics Co., Ltd.
	4	* Authors:
	5	* Inki Dae <inki.dae@samsung.com>
	6	* Joonyoung Shim <jy0922.shim@samsung.com>
	7	* Seung-Woo Kim <sw0312.kim@samsung.com>
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a
	10	* copy of this software and associated documentation files (the "Software"),
	11	* to deal in the Software without restriction, including without limitation
	12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	13	* and/or sell copies of the Software, and to permit persons to whom the
	14	* Software is furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice (including the next
	17	* paragraph) shall be included in all copies or substantial portions of the
	18	* Software.
	19	*
	20	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	21	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	23	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	24	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	25	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	26	* OTHER DEALINGS IN THE SOFTWARE.
	27	*/
	28
	29	#include "drmP.h"
	30	#include "drm_crtc.h"
	31	#include "drm_crtc_helper.h"
	32
	33	#include "exynos_drm_fb.h"
	34	#include "exynos_drm_buf.h"
	35	#include "exynos_drm_gem.h"
	36
	37	#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
	38
	39	/*
	40	* exynos specific framebuffer structure.
	41	*
	42	* @fb: drm framebuffer obejct.
	43	* @exynos_gem_obj: exynos specific gem object containing a gem object.
	44	* @entry: pointer to exynos drm buffer entry object.
	45	* - containing only the information to physically continuous memory
	46	* region allocated at default framebuffer creation.
	47	*/
	48	struct exynos_drm_fb {
	49	struct drm_framebuffer fb;
	50	struct exynos_drm_gem_obj *exynos_gem_obj;
	51	struct exynos_drm_buf_entry *entry;
	52	};
	53
	54	static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
	55	{
	56	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
	57
	58	DRM_DEBUG_KMS("%s\n", __FILE__);
	59
	60	drm_framebuffer_cleanup(fb);
	61
	62	/*
	63	* default framebuffer has no gem object so
	64	* a buffer of the default framebuffer should be released at here.
65	*/
66	if (!exynos_fb->exynos_gem_obj && exynos_fb->entry)
67	exynos_drm_buf_destroy(fb->dev, exynos_fb->entry);
68
69	kfree(exynos_fb);
70	exynos_fb = NULL;
71	}
72
73	static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
74	struct drm_file *file_priv,
75	unsigned int *handle)
76	{
77	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
78
79	DRM_DEBUG_KMS("%s\n", __FILE__);
80
81	return drm_gem_handle_create(file_priv,
82	&exynos_fb->exynos_gem_obj->base, handle);
83	}
84
85	static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
86	struct drm_file *file_priv, unsigned flags,
87	unsigned color, struct drm_clip_rect *clips,
88	unsigned num_clips)
89	{
90	DRM_DEBUG_KMS("%s\n", __FILE__);
91
92	/* TODO */
93
94	return 0;
95	}
96
97	static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
98	.destroy = exynos_drm_fb_destroy,
99	.create_handle = exynos_drm_fb_create_handle,
100	.dirty = exynos_drm_fb_dirty,
101	};
102
103	static struct drm_framebuffer *
104	exynos_drm_fb_init(struct drm_file file_priv, struct drm_device dev,
105	struct drm_mode_fb_cmd *mode_cmd)
106	{
107	struct exynos_drm_fb *exynos_fb;
108	struct drm_framebuffer *fb;
109	struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
110	struct drm_gem_object *obj;
111	unsigned int size;
112	int ret;
113
114	DRM_DEBUG_KMS("%s\n", __FILE__);
115
116	mode_cmd->pitch = max(mode_cmd->pitch,
117	mode_cmd->width * (mode_cmd->bpp >> 3));
118
119	DRM_LOG_KMS("drm fb create(%dx%d)\n",
120	mode_cmd->width, mode_cmd->height);
121
122	exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
123	if (!exynos_fb) {
124	DRM_ERROR("failed to allocate exynos drm framebuffer.\n");
125	return ERR_PTR(-ENOMEM);
126	}
127
128	fb = &exynos_fb->fb;
129	ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
130	if (ret) {
131	DRM_ERROR("failed to initialize framebuffer.\n");
132	goto err_init;
133	}
134
135	DRM_LOG_KMS("create: fb id: %d\n", fb->base.id);
136
137	size = mode_cmd->pitch * mode_cmd->height;
138
139	/*
140	* mode_cmd->handle could be NULL at booting time or
141	* with user request. if NULL, a new buffer or a gem object
142	* would be allocated.
143	*/
144	if (!mode_cmd->handle) {
145	if (!file_priv) {
146	struct exynos_drm_buf_entry *entry;
147
148	/*
149	* in case that file_priv is NULL, it allocates
150	* only buffer and this buffer would be used
151	* for default framebuffer.
152	*/
153	entry = exynos_drm_buf_create(dev, size);
154	if (IS_ERR(entry)) {
155	ret = PTR_ERR(entry);
156	goto err_buffer;
157	}
158
159	exynos_fb->entry = entry;
160
161	DRM_LOG_KMS("default fb: paddr = 0x%lx, size = 0x%x\n",
162	(unsigned long)entry->paddr, size);
163
164	goto out;
165	} else {
166	exynos_gem_obj = exynos_drm_gem_create(file_priv, dev,
167	size,
168	&mode_cmd->handle);
169	if (IS_ERR(exynos_gem_obj)) {
170	ret = PTR_ERR(exynos_gem_obj);
171	goto err_buffer;
172	}
173	}
174	} else {
175	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
176	if (!obj) {
177	DRM_ERROR("failed to lookup gem object.\n");
178	goto err_buffer;
179	}
180
181	exynos_gem_obj = to_exynos_gem_obj(obj);
182
183	drm_gem_object_unreference_unlocked(obj);
184	}
185
186	/*
187	* if got a exynos_gem_obj from either a handle or
188	* a new creation then exynos_fb->exynos_gem_obj is NULL
189	* so that default framebuffer has no its own gem object,
190	* only its own buffer object.
191	*/
192	exynos_fb->entry = exynos_gem_obj->entry;
193
194	DRM_LOG_KMS("paddr = 0x%lx, size = 0x%x, gem object = 0x%x\n",
195	(unsigned long)exynos_fb->entry->paddr, size,
196	(unsigned int)&exynos_gem_obj->base);
197
198	out:
199	exynos_fb->exynos_gem_obj = exynos_gem_obj;
200
201	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
202
203	return fb;
204
205	err_buffer:
206	drm_framebuffer_cleanup(fb);
207
208	err_init:
209	kfree(exynos_fb);
210
211	return ERR_PTR(ret);
212	}
213
214	struct drm_framebuffer exynos_drm_fb_create(struct drm_device dev,
215	struct drm_file *file_priv,
216	struct drm_mode_fb_cmd *mode_cmd)
217	{
218	DRM_DEBUG_KMS("%s\n", __FILE__);
219
220	return exynos_drm_fb_init(file_priv, dev, mode_cmd);
221	}
222
19c8b834	223	struct exynos_drm_buf_entry exynos_drm_fb_get_buf(struct drm_framebuffer fb)
1c248b7d ID	224	{
	225	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
	226	struct exynos_drm_buf_entry *entry;
1c248b7d ID	227
	228	DRM_DEBUG_KMS("%s\n", __FILE__);
	229
1c248b7d	230	entry = exynos_fb->entry;
19c8b834 ID	231	if (!entry)
19c8b834 ID	232	return NULL;
1c248b7d	233
19c8b834 ID	234	DRM_DEBUG_KMS("vaddr = 0x%lx, paddr = 0x%lx\n",
	235	(unsigned long)entry->vaddr,
	236	(unsigned long)entry->paddr);
1c248b7d	237
19c8b834	238	return entry;
1c248b7d ID	239	}
	240
	241	static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
	242	.fb_create = exynos_drm_fb_create,
	243	};
	244
	245	void exynos_drm_mode_config_init(struct drm_device *dev)
	246	{
	247	dev->mode_config.min_width = 0;
	248	dev->mode_config.min_height = 0;
	249
	250	/*
	251	* set max width and height as default value(4096x4096).
	252	* this value would be used to check framebuffer size limitation
	253	* at drm_mode_addfb().
	254	*/
	255	dev->mode_config.max_width = 4096;
	256	dev->mode_config.max_height = 4096;
	257
	258	dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
	259	}
	260
	261	MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
	262	MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
	263	MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
	264	MODULE_DESCRIPTION("Samsung SoC DRM FB Driver");
	265	MODULE_LICENSE("GPL");