[mirror_ubuntu-bionic-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 "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.
 * @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(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->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 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");
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"
7db3eba6	32	#include "drm_fb_helper.h"
1c248b7d	33
7db3eba6	34	#include "exynos_drm_drv.h"
1c248b7d ID	35	#include "exynos_drm_fb.h"
	36	#include "exynos_drm_buf.h"
	37	#include "exynos_drm_gem.h"
	38
	39	#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
	40
	41	/*
	42	* exynos specific framebuffer structure.
	43	*
	44	* @fb: drm framebuffer obejct.
	45	* @exynos_gem_obj: exynos specific gem object containing a gem object.
	46	* @entry: pointer to exynos drm buffer entry object.
	47	* - containing only the information to physically continuous memory
	48	* region allocated at default framebuffer creation.
	49	*/
	50	struct exynos_drm_fb {
	51	struct drm_framebuffer fb;
	52	struct exynos_drm_gem_obj *exynos_gem_obj;
	53	struct exynos_drm_buf_entry *entry;
	54	};
	55
	56	static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
	57	{
	58	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
	59
	60	DRM_DEBUG_KMS("%s\n", __FILE__);
	61
	62	drm_framebuffer_cleanup(fb);
	63
	64	/*
	65	* default framebuffer has no gem object so
	66	* a buffer of the default framebuffer should be released at here.
	67	*/
	68	if (!exynos_fb->exynos_gem_obj && exynos_fb->entry)
	69	exynos_drm_buf_destroy(fb->dev, exynos_fb->entry);
	70
	71	kfree(exynos_fb);
	72	exynos_fb = NULL;
	73	}
	74
	75	static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
	76	struct drm_file *file_priv,
	77	unsigned int *handle)
	78	{
	79	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
	80
	81	DRM_DEBUG_KMS("%s\n", __FILE__);
	82
	83	return drm_gem_handle_create(file_priv,
	84	&exynos_fb->exynos_gem_obj->base, handle);
	85	}
	86
	87	static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
	88	struct drm_file *file_priv, unsigned flags,
	89	unsigned color, struct drm_clip_rect *clips,
	90	unsigned num_clips)
	91	{
	92	DRM_DEBUG_KMS("%s\n", __FILE__);
	93
	94	/* TODO */
	95
	96	return 0;
	97	}
	98
99	static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
100	.destroy = exynos_drm_fb_destroy,
101	.create_handle = exynos_drm_fb_create_handle,
102	.dirty = exynos_drm_fb_dirty,
103	};
104
105	static struct drm_framebuffer *
106	exynos_drm_fb_init(struct drm_file file_priv, struct drm_device dev,
107	struct drm_mode_fb_cmd *mode_cmd)
108	{
109	struct exynos_drm_fb *exynos_fb;
110	struct drm_framebuffer *fb;
111	struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
112	struct drm_gem_object *obj;
113	unsigned int size;
114	int ret;
115
116	DRM_DEBUG_KMS("%s\n", __FILE__);
117
118	mode_cmd->pitch = max(mode_cmd->pitch,
119	mode_cmd->width * (mode_cmd->bpp >> 3));
120
121	DRM_LOG_KMS("drm fb create(%dx%d)\n",
122	mode_cmd->width, mode_cmd->height);
123
124	exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
125	if (!exynos_fb) {
126	DRM_ERROR("failed to allocate exynos drm framebuffer.\n");
127	return ERR_PTR(-ENOMEM);
128	}
129
130	fb = &exynos_fb->fb;
131	ret = drm_framebuffer_init(dev, fb, &exynos_drm_fb_funcs);
132	if (ret) {
133	DRM_ERROR("failed to initialize framebuffer.\n");
134	goto err_init;
135	}
136
137	DRM_LOG_KMS("create: fb id: %d\n", fb->base.id);
138
139	size = mode_cmd->pitch * mode_cmd->height;
140
141	/*
142	* mode_cmd->handle could be NULL at booting time or
143	* with user request. if NULL, a new buffer or a gem object
144	* would be allocated.
145	*/
146	if (!mode_cmd->handle) {
147	if (!file_priv) {
148	struct exynos_drm_buf_entry *entry;
149
150	/*
151	* in case that file_priv is NULL, it allocates
152	* only buffer and this buffer would be used
153	* for default framebuffer.
154	*/
155	entry = exynos_drm_buf_create(dev, size);
156	if (IS_ERR(entry)) {
157	ret = PTR_ERR(entry);
158	goto err_buffer;
159	}
160
161	exynos_fb->entry = entry;
162
163	DRM_LOG_KMS("default fb: paddr = 0x%lx, size = 0x%x\n",
164	(unsigned long)entry->paddr, size);
165
166	goto out;
167	} else {
f088d5a9 ID	168	exynos_gem_obj = exynos_drm_gem_create(dev, file_priv,
	169	&mode_cmd->handle,
	170	size);
1c248b7d ID	171	if (IS_ERR(exynos_gem_obj)) {
	172	ret = PTR_ERR(exynos_gem_obj);
	173	goto err_buffer;
	174	}
	175	}
	176	} else {
	177	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
	178	if (!obj) {
	179	DRM_ERROR("failed to lookup gem object.\n");
	180	goto err_buffer;
	181	}
	182
	183	exynos_gem_obj = to_exynos_gem_obj(obj);
	184
	185	drm_gem_object_unreference_unlocked(obj);
	186	}
	187
	188	/*
	189	* if got a exynos_gem_obj from either a handle or
	190	* a new creation then exynos_fb->exynos_gem_obj is NULL
	191	* so that default framebuffer has no its own gem object,
	192	* only its own buffer object.
	193	*/
	194	exynos_fb->entry = exynos_gem_obj->entry;
	195
	196	DRM_LOG_KMS("paddr = 0x%lx, size = 0x%x, gem object = 0x%x\n",
	197	(unsigned long)exynos_fb->entry->paddr, size,
	198	(unsigned int)&exynos_gem_obj->base);
	199
	200	out:
	201	exynos_fb->exynos_gem_obj = exynos_gem_obj;
	202
	203	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
	204
	205	return fb;
	206
	207	err_buffer:
	208	drm_framebuffer_cleanup(fb);
	209
	210	err_init:
	211	kfree(exynos_fb);
	212
	213	return ERR_PTR(ret);
	214	}
	215
	216	struct drm_framebuffer exynos_drm_fb_create(struct drm_device dev,
	217	struct drm_file *file_priv,
	218	struct drm_mode_fb_cmd *mode_cmd)
	219	{
	220	DRM_DEBUG_KMS("%s\n", __FILE__);
	221
	222	return exynos_drm_fb_init(file_priv, dev, mode_cmd);
	223	}
	224
19c8b834	225	struct exynos_drm_buf_entry exynos_drm_fb_get_buf(struct drm_framebuffer fb)
1c248b7d ID	226	{
	227	struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
	228	struct exynos_drm_buf_entry *entry;
1c248b7d ID	229
	230	DRM_DEBUG_KMS("%s\n", __FILE__);
	231
1c248b7d	232	entry = exynos_fb->entry;
19c8b834 ID	233	if (!entry)
19c8b834 ID	234	return NULL;
1c248b7d	235
19c8b834 ID	236	DRM_DEBUG_KMS("vaddr = 0x%lx, paddr = 0x%lx\n",
	237	(unsigned long)entry->vaddr,
	238	(unsigned long)entry->paddr);
1c248b7d	239
19c8b834	240	return entry;
1c248b7d ID	241	}
1c248b7d ID	242
7db3eba6 SWK	243	static void exynos_drm_output_poll_changed(struct drm_device *dev)
	244	{
	245	struct exynos_drm_private *private = dev->dev_private;
	246	struct drm_fb_helper *fb_helper = private->fb_helper;
	247
	248	if (fb_helper)
	249	drm_fb_helper_hotplug_event(fb_helper);
	250	}
	251
1c248b7d ID	252	static struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
1c248b7d ID	253	.fb_create = exynos_drm_fb_create,
7db3eba6	254	.output_poll_changed = exynos_drm_output_poll_changed,
1c248b7d ID	255	};
	256
	257	void exynos_drm_mode_config_init(struct drm_device *dev)
	258	{
	259	dev->mode_config.min_width = 0;
	260	dev->mode_config.min_height = 0;
	261
	262	/*
	263	* set max width and height as default value(4096x4096).
	264	* this value would be used to check framebuffer size limitation
	265	* at drm_mode_addfb().
	266	*/
	267	dev->mode_config.max_width = 4096;
	268	dev->mode_config.max_height = 4096;
	269
	270	dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
	271	}
	272
	273	MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
	274	MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
	275	MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
	276	MODULE_DESCRIPTION("Samsung SoC DRM FB Driver");
	277	MODULE_LICENSE("GPL");