1 /*
2 * drivers/staging/omapdrm/omap_fb.c
3 *
4 * Copyright (C) 2011 Texas Instruments
5 * Author: Rob Clark <rob@ti.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "omap_drv.h"
21
22 #include "drm_crtc.h"
23 #include "drm_crtc_helper.h"
24
25 /*
26 * framebuffer funcs
27 */
28
29 /* per-format info: */
30 struct format {
31 enum omap_color_mode dss_format;
32 uint32_t pixel_format;
33 struct {
34 int stride_bpp; /* this times width is stride */
35 int sub_y; /* sub-sample in y dimension */
36 } planes[4];
37 bool yuv;
38 };
39
40 static const struct format formats[] = {
41 /* 16bpp [A]RGB: */
42 { OMAP_DSS_COLOR_RGB16, DRM_FORMAT_RGB565, {{2, 1}}, false }, /* RGB16-565 */
43 { OMAP_DSS_COLOR_RGB12U, DRM_FORMAT_RGBX4444, {{2, 1}}, false }, /* RGB12x-4444 */
44 { OMAP_DSS_COLOR_RGBX16, DRM_FORMAT_XRGB4444, {{2, 1}}, false }, /* xRGB12-4444 */
45 { OMAP_DSS_COLOR_RGBA16, DRM_FORMAT_RGBA4444, {{2, 1}}, false }, /* RGBA12-4444 */
46 { OMAP_DSS_COLOR_ARGB16, DRM_FORMAT_ARGB4444, {{2, 1}}, false }, /* ARGB16-4444 */
47 { OMAP_DSS_COLOR_XRGB16_1555, DRM_FORMAT_XRGB1555, {{2, 1}}, false }, /* xRGB15-1555 */
48 { OMAP_DSS_COLOR_ARGB16_1555, DRM_FORMAT_ARGB1555, {{2, 1}}, false }, /* ARGB16-1555 */
49 /* 24bpp RGB: */
50 { OMAP_DSS_COLOR_RGB24P, DRM_FORMAT_RGB888, {{3, 1}}, false }, /* RGB24-888 */
51 /* 32bpp [A]RGB: */
52 { OMAP_DSS_COLOR_RGBX32, DRM_FORMAT_RGBX8888, {{4, 1}}, false }, /* RGBx24-8888 */
53 { OMAP_DSS_COLOR_RGB24U, DRM_FORMAT_XRGB8888, {{4, 1}}, false }, /* xRGB24-8888 */
54 { OMAP_DSS_COLOR_RGBA32, DRM_FORMAT_RGBA8888, {{4, 1}}, false }, /* RGBA32-8888 */
55 { OMAP_DSS_COLOR_ARGB32, DRM_FORMAT_ARGB8888, {{4, 1}}, false }, /* ARGB32-8888 */
56 /* YUV: */
57 { OMAP_DSS_COLOR_NV12, DRM_FORMAT_NV12, {{1, 1}, {1, 2}}, true },
58 { OMAP_DSS_COLOR_YUV2, DRM_FORMAT_YUYV, {{2, 1}}, true },
59 { OMAP_DSS_COLOR_UYVY, DRM_FORMAT_UYVY, {{2, 1}}, true },
60 };
61
62 /* per-plane info for the fb: */
63 struct plane {
64 struct drm_gem_object *bo;
65 uint32_t pitch;
66 uint32_t offset;
67 dma_addr_t paddr;
68 };
69
70 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
71
72 struct omap_framebuffer {
73 struct drm_framebuffer base;
74 const struct format *format;
75 struct plane planes[4];
76 };
77
omap_framebuffer_create_handle(struct drm_framebuffer * fb,struct drm_file * file_priv,unsigned int * handle)78 static int omap_framebuffer_create_handle(struct drm_framebuffer *fb,
79 struct drm_file *file_priv,
80 unsigned int *handle)
81 {
82 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
83 return drm_gem_handle_create(file_priv,
84 omap_fb->planes[0].bo, handle);
85 }
86
omap_framebuffer_destroy(struct drm_framebuffer * fb)87 static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
88 {
89 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
90 int i, n = drm_format_num_planes(omap_fb->format->pixel_format);
91
92 DBG("destroy: FB ID: %d (%p)", fb->base.id, fb);
93
94 drm_framebuffer_cleanup(fb);
95
96 for (i = 0; i < n; i++) {
97 struct plane *plane = &omap_fb->planes[i];
98 if (plane->bo)
99 drm_gem_object_unreference_unlocked(plane->bo);
100 }
101
102 kfree(omap_fb);
103 }
104
omap_framebuffer_dirty(struct drm_framebuffer * fb,struct drm_file * file_priv,unsigned flags,unsigned color,struct drm_clip_rect * clips,unsigned num_clips)105 static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
106 struct drm_file *file_priv, unsigned flags, unsigned color,
107 struct drm_clip_rect *clips, unsigned num_clips)
108 {
109 int i;
110
111 for (i = 0; i < num_clips; i++) {
112 omap_framebuffer_flush(fb, clips[i].x1, clips[i].y1,
113 clips[i].x2 - clips[i].x1,
114 clips[i].y2 - clips[i].y1);
115 }
116
117 return 0;
118 }
119
120 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
121 .create_handle = omap_framebuffer_create_handle,
122 .destroy = omap_framebuffer_destroy,
123 .dirty = omap_framebuffer_dirty,
124 };
125
126 /* pins buffer in preparation for scanout */
omap_framebuffer_pin(struct drm_framebuffer * fb)127 int omap_framebuffer_pin(struct drm_framebuffer *fb)
128 {
129 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
130 int ret, i, n = drm_format_num_planes(omap_fb->format->pixel_format);
131
132 for (i = 0; i < n; i++) {
133 struct plane *plane = &omap_fb->planes[i];
134 ret = omap_gem_get_paddr(plane->bo, &plane->paddr, true);
135 if (ret)
136 goto fail;
137 }
138
139 return 0;
140
141 fail:
142 while (--i > 0) {
143 struct plane *plane = &omap_fb->planes[i];
144 omap_gem_put_paddr(plane->bo);
145 }
146 return ret;
147 }
148
149 /* releases buffer when done with scanout */
omap_framebuffer_unpin(struct drm_framebuffer * fb)150 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
151 {
152 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
153 int i, n = drm_format_num_planes(omap_fb->format->pixel_format);
154
155 for (i = 0; i < n; i++) {
156 struct plane *plane = &omap_fb->planes[i];
157 omap_gem_put_paddr(plane->bo);
158 }
159 }
160
161 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
162 */
omap_framebuffer_update_scanout(struct drm_framebuffer * fb,int x,int y,struct omap_overlay_info * info)163 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, int x, int y,
164 struct omap_overlay_info *info)
165 {
166 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
167 const struct format *format = omap_fb->format;
168 struct plane *plane = &omap_fb->planes[0];
169 unsigned int offset;
170
171 offset = plane->offset +
172 (x * format->planes[0].stride_bpp) +
173 (y * plane->pitch / format->planes[0].sub_y);
174
175 info->color_mode = format->dss_format;
176 info->paddr = plane->paddr + offset;
177 info->screen_width = plane->pitch / format->planes[0].stride_bpp;
178
179 if (format->dss_format == OMAP_DSS_COLOR_NV12) {
180 plane = &omap_fb->planes[1];
181 offset = plane->offset +
182 (x * format->planes[1].stride_bpp) +
183 (y * plane->pitch / format->planes[1].sub_y);
184 info->p_uv_addr = plane->paddr + offset;
185 } else {
186 info->p_uv_addr = 0;
187 }
188 }
189
omap_framebuffer_bo(struct drm_framebuffer * fb,int p)190 struct drm_gem_object *omap_framebuffer_bo(struct drm_framebuffer *fb, int p)
191 {
192 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
193 if (p >= drm_format_num_planes(omap_fb->format->pixel_format))
194 return NULL;
195 return omap_fb->planes[p].bo;
196 }
197
198 /* iterate thru all the connectors, returning ones that are attached
199 * to the same fb..
200 */
omap_framebuffer_get_next_connector(struct drm_framebuffer * fb,struct drm_connector * from)201 struct drm_connector *omap_framebuffer_get_next_connector(
202 struct drm_framebuffer *fb, struct drm_connector *from)
203 {
204 struct drm_device *dev = fb->dev;
205 struct list_head *connector_list = &dev->mode_config.connector_list;
206 struct drm_connector *connector = from;
207
208 if (!from) {
209 return list_first_entry(connector_list, typeof(*from), head);
210 }
211
212 list_for_each_entry_from(connector, connector_list, head) {
213 if (connector != from) {
214 struct drm_encoder *encoder = connector->encoder;
215 struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
216 if (crtc && crtc->fb == fb) {
217 return connector;
218 }
219 }
220 }
221
222 return NULL;
223 }
224
225 /* flush an area of the framebuffer (in case of manual update display that
226 * is not automatically flushed)
227 */
omap_framebuffer_flush(struct drm_framebuffer * fb,int x,int y,int w,int h)228 void omap_framebuffer_flush(struct drm_framebuffer *fb,
229 int x, int y, int w, int h)
230 {
231 struct drm_connector *connector = NULL;
232
233 VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
234
235 while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
236 /* only consider connectors that are part of a chain */
237 if (connector->encoder && connector->encoder->crtc) {
238 /* TODO: maybe this should propagate thru the crtc who
239 * could do the coordinate translation..
240 */
241 struct drm_crtc *crtc = connector->encoder->crtc;
242 int cx = max(0, x - crtc->x);
243 int cy = max(0, y - crtc->y);
244 int cw = w + (x - crtc->x) - cx;
245 int ch = h + (y - crtc->y) - cy;
246
247 omap_connector_flush(connector, cx, cy, cw, ch);
248 }
249 }
250 }
251
omap_framebuffer_create(struct drm_device * dev,struct drm_file * file,struct drm_mode_fb_cmd2 * mode_cmd)252 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
253 struct drm_file *file, struct drm_mode_fb_cmd2 *mode_cmd)
254 {
255 struct drm_gem_object *bos[4];
256 struct drm_framebuffer *fb;
257 int ret;
258
259 ret = objects_lookup(dev, file, mode_cmd->pixel_format,
260 bos, mode_cmd->handles);
261 if (ret)
262 return ERR_PTR(ret);
263
264 fb = omap_framebuffer_init(dev, mode_cmd, bos);
265 if (IS_ERR(fb)) {
266 int i, n = drm_format_num_planes(mode_cmd->pixel_format);
267 for (i = 0; i < n; i++)
268 drm_gem_object_unreference_unlocked(bos[i]);
269 return fb;
270 }
271 return fb;
272 }
273
omap_framebuffer_init(struct drm_device * dev,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** bos)274 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
275 struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
276 {
277 struct omap_framebuffer *omap_fb;
278 struct drm_framebuffer *fb = NULL;
279 const struct format *format = NULL;
280 int ret, i, n = drm_format_num_planes(mode_cmd->pixel_format);
281
282 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
283 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
284 (char *)&mode_cmd->pixel_format);
285
286 for (i = 0; i < ARRAY_SIZE(formats); i++) {
287 if (formats[i].pixel_format == mode_cmd->pixel_format) {
288 format = &formats[i];
289 break;
290 }
291 }
292
293 if (!format) {
294 dev_err(dev->dev, "unsupported pixel format: %4.4s\n",
295 (char *)&mode_cmd->pixel_format);
296 ret = -EINVAL;
297 goto fail;
298 }
299
300 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
301 if (!omap_fb) {
302 dev_err(dev->dev, "could not allocate fb\n");
303 ret = -ENOMEM;
304 goto fail;
305 }
306
307 fb = &omap_fb->base;
308 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
309 if (ret) {
310 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
311 goto fail;
312 }
313
314 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
315
316 omap_fb->format = format;
317
318 for (i = 0; i < n; i++) {
319 struct plane *plane = &omap_fb->planes[i];
320 int size, pitch = mode_cmd->pitches[i];
321
322 if (pitch < (mode_cmd->width * format->planes[i].stride_bpp)) {
323 dev_err(dev->dev, "provided buffer pitch is too small! %d < %d\n",
324 pitch, mode_cmd->width * format->planes[i].stride_bpp);
325 ret = -EINVAL;
326 goto fail;
327 }
328
329 size = pitch * mode_cmd->height / format->planes[i].sub_y;
330
331 if (size > (bos[i]->size - mode_cmd->offsets[i])) {
332 dev_err(dev->dev, "provided buffer object is too small! %d < %d\n",
333 bos[i]->size - mode_cmd->offsets[i], size);
334 ret = -EINVAL;
335 goto fail;
336 }
337
338 plane->bo = bos[i];
339 plane->offset = mode_cmd->offsets[i];
340 plane->pitch = mode_cmd->pitches[i];
341 plane->paddr = pitch;
342 }
343
344 drm_helper_mode_fill_fb_struct(fb, mode_cmd);
345
346 return fb;
347
348 fail:
349 if (fb) {
350 omap_framebuffer_destroy(fb);
351 }
352 return ERR_PTR(ret);
353 }
354