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Inki Dae1c248b72011-10-04 19:19:01 +09001/* 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 *
Inki Daed81aecb2012-12-18 02:30:17 +09009 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
Inki Dae1c248b72011-10-04 19:19:01 +090013 */
14
David Howells760285e2012-10-02 18:01:07 +010015#include <drm/drmP.h>
16#include <drm/drm_crtc.h>
17#include <drm/drm_crtc_helper.h>
18#include <drm/drm_fb_helper.h>
Inki Dae0519f9a2012-10-20 07:53:42 -070019#include <uapi/drm/exynos_drm.h>
Inki Dae1c248b72011-10-04 19:19:01 +090020
Seung-Woo Kim7db3eba2011-10-18 16:58:05 +090021#include "exynos_drm_drv.h"
Inki Dae1c248b72011-10-04 19:19:01 +090022#include "exynos_drm_fb.h"
Inki Dae1c248b72011-10-04 19:19:01 +090023#include "exynos_drm_gem.h"
Inki Dae0519f9a2012-10-20 07:53:42 -070024#include "exynos_drm_iommu.h"
Inki Dae1daa8922012-11-22 17:41:23 +090025#include "exynos_drm_encoder.h"
Inki Dae1c248b72011-10-04 19:19:01 +090026
27#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
28
29/*
30 * exynos specific framebuffer structure.
31 *
32 * @fb: drm framebuffer obejct.
Inki Dae01ed8122012-08-20 20:05:56 +090033 * @buf_cnt: a buffer count to drm framebuffer.
Seung-Woo Kim229d3532011-12-15 14:36:22 +090034 * @exynos_gem_obj: array of exynos specific gem object containing a gem object.
Inki Dae1c248b72011-10-04 19:19:01 +090035 */
36struct exynos_drm_fb {
37 struct drm_framebuffer fb;
Inki Dae01ed8122012-08-20 20:05:56 +090038 unsigned int buf_cnt;
Seung-Woo Kim229d3532011-12-15 14:36:22 +090039 struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER];
Inki Dae1c248b72011-10-04 19:19:01 +090040};
41
Inki Dae0519f9a2012-10-20 07:53:42 -070042static int check_fb_gem_memory_type(struct drm_device *drm_dev,
43 struct exynos_drm_gem_obj *exynos_gem_obj)
44{
45 unsigned int flags;
46
47 /*
48 * if exynos drm driver supports iommu then framebuffer can use
49 * all the buffer types.
50 */
51 if (is_drm_iommu_supported(drm_dev))
52 return 0;
53
54 flags = exynos_gem_obj->flags;
55
56 /*
57 * without iommu support, not support physically non-continuous memory
58 * for framebuffer.
59 */
60 if (IS_NONCONTIG_BUFFER(flags)) {
61 DRM_ERROR("cannot use this gem memory type for fb.\n");
62 return -EINVAL;
63 }
64
65 return 0;
66}
67
Inki Dae1c248b72011-10-04 19:19:01 +090068static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
69{
70 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
Laurent Pinchart07b68352012-05-16 17:08:56 +020071 unsigned int i;
Inki Dae1c248b72011-10-04 19:19:01 +090072
73 DRM_DEBUG_KMS("%s\n", __FILE__);
74
Inki Dae1daa8922012-11-22 17:41:23 +090075 /* make sure that overlay data are updated before relesing fb. */
76 exynos_drm_encoder_complete_scanout(fb);
77
Inki Dae1c248b72011-10-04 19:19:01 +090078 drm_framebuffer_cleanup(fb);
79
Laurent Pinchart07b68352012-05-16 17:08:56 +020080 for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) {
81 struct drm_gem_object *obj;
82
83 if (exynos_fb->exynos_gem_obj[i] == NULL)
84 continue;
85
86 obj = &exynos_fb->exynos_gem_obj[i]->base;
87 drm_gem_object_unreference_unlocked(obj);
88 }
89
Inki Dae1c248b72011-10-04 19:19:01 +090090 kfree(exynos_fb);
91 exynos_fb = NULL;
92}
93
94static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
95 struct drm_file *file_priv,
96 unsigned int *handle)
97{
98 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
99
100 DRM_DEBUG_KMS("%s\n", __FILE__);
101
Inki Daeb9ede272013-01-29 17:51:09 +0900102 /* This fb should have only one gem object. */
103 if (WARN_ON(exynos_fb->buf_cnt != 1))
104 return -EINVAL;
105
Inki Dae1c248b72011-10-04 19:19:01 +0900106 return drm_gem_handle_create(file_priv,
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900107 &exynos_fb->exynos_gem_obj[0]->base, handle);
Inki Dae1c248b72011-10-04 19:19:01 +0900108}
109
110static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
111 struct drm_file *file_priv, unsigned flags,
112 unsigned color, struct drm_clip_rect *clips,
113 unsigned num_clips)
114{
115 DRM_DEBUG_KMS("%s\n", __FILE__);
116
117 /* TODO */
118
119 return 0;
120}
121
122static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
123 .destroy = exynos_drm_fb_destroy,
124 .create_handle = exynos_drm_fb_create_handle,
125 .dirty = exynos_drm_fb_dirty,
126};
127
Inki Dae01ed8122012-08-20 20:05:56 +0900128void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb,
129 unsigned int cnt)
130{
131 struct exynos_drm_fb *exynos_fb;
132
133 exynos_fb = to_exynos_fb(fb);
134
135 exynos_fb->buf_cnt = cnt;
136}
137
138unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb)
139{
140 struct exynos_drm_fb *exynos_fb;
141
142 exynos_fb = to_exynos_fb(fb);
143
144 return exynos_fb->buf_cnt;
145}
146
Joonyoung Shime1533c02011-12-13 14:46:57 +0900147struct drm_framebuffer *
148exynos_drm_framebuffer_init(struct drm_device *dev,
149 struct drm_mode_fb_cmd2 *mode_cmd,
150 struct drm_gem_object *obj)
Inki Dae1c248b72011-10-04 19:19:01 +0900151{
152 struct exynos_drm_fb *exynos_fb;
Inki Dae0519f9a2012-10-20 07:53:42 -0700153 struct exynos_drm_gem_obj *exynos_gem_obj;
Inki Dae1c248b72011-10-04 19:19:01 +0900154 int ret;
155
Inki Dae0519f9a2012-10-20 07:53:42 -0700156 exynos_gem_obj = to_exynos_gem_obj(obj);
157
158 ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
159 if (ret < 0) {
160 DRM_ERROR("cannot use this gem memory type for fb.\n");
161 return ERR_PTR(-EINVAL);
162 }
163
Inki Dae1c248b72011-10-04 19:19:01 +0900164 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
165 if (!exynos_fb) {
Joonyoung Shime1533c02011-12-13 14:46:57 +0900166 DRM_ERROR("failed to allocate exynos drm framebuffer\n");
Inki Dae1c248b72011-10-04 19:19:01 +0900167 return ERR_PTR(-ENOMEM);
168 }
169
Daniel Vetterf2c00952012-12-14 13:39:03 +0900170 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
Inki Dae0519f9a2012-10-20 07:53:42 -0700171 exynos_fb->exynos_gem_obj[0] = exynos_gem_obj;
172
Joonyoung Shime1533c02011-12-13 14:46:57 +0900173 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
Inki Dae1c248b72011-10-04 19:19:01 +0900174 if (ret) {
Joonyoung Shime1533c02011-12-13 14:46:57 +0900175 DRM_ERROR("failed to initialize framebuffer\n");
176 return ERR_PTR(ret);
Inki Dae1c248b72011-10-04 19:19:01 +0900177 }
178
Joonyoung Shime1533c02011-12-13 14:46:57 +0900179 return &exynos_fb->fb;
Inki Dae1c248b72011-10-04 19:19:01 +0900180}
181
Inki Dae01ed8122012-08-20 20:05:56 +0900182static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2 *mode_cmd)
183{
184 unsigned int cnt = 0;
185
186 if (mode_cmd->pixel_format != DRM_FORMAT_NV12)
187 return drm_format_num_planes(mode_cmd->pixel_format);
188
189 while (cnt != MAX_FB_BUFFER) {
190 if (!mode_cmd->handles[cnt])
191 break;
192 cnt++;
193 }
194
195 /*
196 * check if NV12 or NV12M.
197 *
198 * NV12
199 * handles[0] = base1, offsets[0] = 0
200 * handles[1] = base1, offsets[1] = Y_size
201 *
202 * NV12M
203 * handles[0] = base1, offsets[0] = 0
204 * handles[1] = base2, offsets[1] = 0
205 */
206 if (cnt == 2) {
207 /*
208 * in case of NV12 format, offsets[1] is not 0 and
209 * handles[0] is same as handles[1].
210 */
211 if (mode_cmd->offsets[1] &&
212 mode_cmd->handles[0] == mode_cmd->handles[1])
213 cnt = 1;
214 }
215
216 return cnt;
217}
218
Joonyoung Shime1533c02011-12-13 14:46:57 +0900219static struct drm_framebuffer *
220exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
221 struct drm_mode_fb_cmd2 *mode_cmd)
Inki Dae1c248b72011-10-04 19:19:01 +0900222{
Joonyoung Shime1533c02011-12-13 14:46:57 +0900223 struct drm_gem_object *obj;
YoungJun Cho979c0c72013-02-12 21:23:54 +0900224 struct exynos_drm_gem_obj *exynos_gem_obj;
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900225 struct exynos_drm_fb *exynos_fb;
Daniel Vetterf2c00952012-12-14 13:39:03 +0900226 int i, ret;
Joonyoung Shime1533c02011-12-13 14:46:57 +0900227
Inki Dae1c248b72011-10-04 19:19:01 +0900228 DRM_DEBUG_KMS("%s\n", __FILE__);
229
Daniel Vetterf2c00952012-12-14 13:39:03 +0900230 exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
231 if (!exynos_fb) {
232 DRM_ERROR("failed to allocate exynos drm framebuffer\n");
233 return ERR_PTR(-ENOMEM);
Laurent Pinchart07b68352012-05-16 17:08:56 +0200234 }
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900235
YoungJun Cho979c0c72013-02-12 21:23:54 +0900236 obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
237 if (!obj) {
238 DRM_ERROR("failed to lookup gem object\n");
239 ret = -ENOENT;
240 goto err_free;
241 }
242
Daniel Vetterf2c00952012-12-14 13:39:03 +0900243 drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
244 exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
Inki Dae01ed8122012-08-20 20:05:56 +0900245 exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd);
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900246
Inki Dae01ed8122012-08-20 20:05:56 +0900247 DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt);
248
249 for (i = 1; i < exynos_fb->buf_cnt; i++) {
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900250 obj = drm_gem_object_lookup(dev, file_priv,
251 mode_cmd->handles[i]);
252 if (!obj) {
253 DRM_ERROR("failed to lookup gem object\n");
YoungJun Cho979c0c72013-02-12 21:23:54 +0900254 ret = -ENOENT;
255 exynos_fb->buf_cnt = i;
256 goto err_unreference;
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900257 }
258
Inki Dae0519f9a2012-10-20 07:53:42 -0700259 exynos_gem_obj = to_exynos_gem_obj(obj);
YoungJun Cho979c0c72013-02-12 21:23:54 +0900260 exynos_fb->exynos_gem_obj[i] = exynos_gem_obj;
Inki Dae0519f9a2012-10-20 07:53:42 -0700261
262 ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
263 if (ret < 0) {
264 DRM_ERROR("cannot use this gem memory type for fb.\n");
YoungJun Cho979c0c72013-02-12 21:23:54 +0900265 goto err_unreference;
Inki Dae0519f9a2012-10-20 07:53:42 -0700266 }
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900267 }
268
Daniel Vetterf2c00952012-12-14 13:39:03 +0900269 ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
270 if (ret) {
YoungJun Cho979c0c72013-02-12 21:23:54 +0900271 DRM_ERROR("failed to init framebuffer.\n");
272 goto err_unreference;
Daniel Vetterf2c00952012-12-14 13:39:03 +0900273 }
274
275 return &exynos_fb->fb;
YoungJun Cho979c0c72013-02-12 21:23:54 +0900276
277err_unreference:
278 for (i = 0; i < exynos_fb->buf_cnt; i++) {
279 struct drm_gem_object *obj;
280
281 obj = &exynos_fb->exynos_gem_obj[i]->base;
282 if (obj)
283 drm_gem_object_unreference_unlocked(obj);
284 }
285err_free:
286 kfree(exynos_fb);
287 return ERR_PTR(ret);
Inki Dae1c248b72011-10-04 19:19:01 +0900288}
289
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900290struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb,
291 int index)
Inki Dae1c248b72011-10-04 19:19:01 +0900292{
293 struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
Inki Dae2c871122011-11-12 15:23:32 +0900294 struct exynos_drm_gem_buf *buffer;
Inki Dae1c248b72011-10-04 19:19:01 +0900295
296 DRM_DEBUG_KMS("%s\n", __FILE__);
297
Seung-Woo Kim229d3532011-12-15 14:36:22 +0900298 if (index >= MAX_FB_BUFFER)
299 return NULL;
300
301 buffer = exynos_fb->exynos_gem_obj[index]->buffer;
Inki Dae2c871122011-11-12 15:23:32 +0900302 if (!buffer)
Inki Dae19c8b832011-10-14 13:29:46 +0900303 return NULL;
Inki Dae1c248b72011-10-04 19:19:01 +0900304
Inki Dae4744ad22012-12-07 17:51:27 +0900305 DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr);
Inki Dae1c248b72011-10-04 19:19:01 +0900306
Inki Dae2c871122011-11-12 15:23:32 +0900307 return buffer;
Inki Dae1c248b72011-10-04 19:19:01 +0900308}
309
Seung-Woo Kim7db3eba2011-10-18 16:58:05 +0900310static void exynos_drm_output_poll_changed(struct drm_device *dev)
311{
312 struct exynos_drm_private *private = dev->dev_private;
313 struct drm_fb_helper *fb_helper = private->fb_helper;
314
315 if (fb_helper)
316 drm_fb_helper_hotplug_event(fb_helper);
317}
318
Laurent Pincharte6ecefa2012-05-17 13:27:23 +0200319static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
Joonyoung Shime1533c02011-12-13 14:46:57 +0900320 .fb_create = exynos_user_fb_create,
Seung-Woo Kim7db3eba2011-10-18 16:58:05 +0900321 .output_poll_changed = exynos_drm_output_poll_changed,
Inki Dae1c248b72011-10-04 19:19:01 +0900322};
323
324void exynos_drm_mode_config_init(struct drm_device *dev)
325{
326 dev->mode_config.min_width = 0;
327 dev->mode_config.min_height = 0;
328
329 /*
330 * set max width and height as default value(4096x4096).
331 * this value would be used to check framebuffer size limitation
332 * at drm_mode_addfb().
333 */
334 dev->mode_config.max_width = 4096;
335 dev->mode_config.max_height = 4096;
336
337 dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
338}