summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/exynos/exynos_drm_fb.c
blob: 5bf4a1ac7f828cd26509857e5ed9b024f094f831 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
/* 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");