1 /*
2 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
3 * Author: Rob Clark <rob@ti.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 as published by
7 * the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #include <linux/seq_file.h>
19
20 #include <drm/drm_crtc.h>
21 #include <drm/drm_crtc_helper.h>
22 #include <drm/drm_gem_framebuffer_helper.h>
23
24 #include "omap_dmm_tiler.h"
25 #include "omap_drv.h"
26
27 /*
28 * framebuffer funcs
29 */
30
31 static const u32 formats[] = {
32 /* 16bpp [A]RGB: */
33 DRM_FORMAT_RGB565, /* RGB16-565 */
34 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
35 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
36 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
37 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
38 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
39 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
40 /* 24bpp RGB: */
41 DRM_FORMAT_RGB888, /* RGB24-888 */
42 /* 32bpp [A]RGB: */
43 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
44 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
45 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
46 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
47 /* YUV: */
48 DRM_FORMAT_NV12,
49 DRM_FORMAT_YUYV,
50 DRM_FORMAT_UYVY,
51 };
52
53 /* per-plane info for the fb: */
54 struct plane {
55 dma_addr_t dma_addr;
56 };
57
58 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
59
60 struct omap_framebuffer {
61 struct drm_framebuffer base;
62 int pin_count;
63 const struct drm_format_info *format;
64 struct plane planes[2];
65 /* lock for pinning (pin_count and planes.dma_addr) */
66 struct mutex lock;
67 };
68
69 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
70 .create_handle = drm_gem_fb_create_handle,
71 .destroy = drm_gem_fb_destroy,
72 };
73
get_linear_addr(struct drm_framebuffer * fb,const struct drm_format_info * format,int n,int x,int y)74 static u32 get_linear_addr(struct drm_framebuffer *fb,
75 const struct drm_format_info *format, int n, int x, int y)
76 {
77 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
78 struct plane *plane = &omap_fb->planes[n];
79 u32 offset;
80
81 offset = fb->offsets[n]
82 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
83 + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub));
84
85 return plane->dma_addr + offset;
86 }
87
omap_framebuffer_supports_rotation(struct drm_framebuffer * fb)88 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
89 {
90 return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED;
91 }
92
93 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
drm_rotation_to_tiler(unsigned int drm_rot)94 static u32 drm_rotation_to_tiler(unsigned int drm_rot)
95 {
96 u32 orient;
97
98 switch (drm_rot & DRM_MODE_ROTATE_MASK) {
99 default:
100 case DRM_MODE_ROTATE_0:
101 orient = 0;
102 break;
103 case DRM_MODE_ROTATE_90:
104 orient = MASK_XY_FLIP | MASK_X_INVERT;
105 break;
106 case DRM_MODE_ROTATE_180:
107 orient = MASK_X_INVERT | MASK_Y_INVERT;
108 break;
109 case DRM_MODE_ROTATE_270:
110 orient = MASK_XY_FLIP | MASK_Y_INVERT;
111 break;
112 }
113
114 if (drm_rot & DRM_MODE_REFLECT_X)
115 orient ^= MASK_X_INVERT;
116
117 if (drm_rot & DRM_MODE_REFLECT_Y)
118 orient ^= MASK_Y_INVERT;
119
120 return orient;
121 }
122
123 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
124 */
omap_framebuffer_update_scanout(struct drm_framebuffer * fb,struct drm_plane_state * state,struct omap_overlay_info * info)125 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
126 struct drm_plane_state *state, struct omap_overlay_info *info)
127 {
128 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
129 const struct drm_format_info *format = omap_fb->format;
130 struct plane *plane = &omap_fb->planes[0];
131 u32 x, y, orient = 0;
132
133 info->fourcc = fb->format->format;
134
135 info->pos_x = state->crtc_x;
136 info->pos_y = state->crtc_y;
137 info->out_width = state->crtc_w;
138 info->out_height = state->crtc_h;
139 info->width = state->src_w >> 16;
140 info->height = state->src_h >> 16;
141
142 /* DSS driver wants the w & h in rotated orientation */
143 if (drm_rotation_90_or_270(state->rotation))
144 swap(info->width, info->height);
145
146 x = state->src_x >> 16;
147 y = state->src_y >> 16;
148
149 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED) {
150 u32 w = state->src_w >> 16;
151 u32 h = state->src_h >> 16;
152
153 orient = drm_rotation_to_tiler(state->rotation);
154
155 /*
156 * omap_gem_rotated_paddr() wants the x & y in tiler units.
157 * Usually tiler unit size is the same as the pixel size, except
158 * for YUV422 formats, for which the tiler unit size is 32 bits
159 * and pixel size is 16 bits.
160 */
161 if (fb->format->format == DRM_FORMAT_UYVY ||
162 fb->format->format == DRM_FORMAT_YUYV) {
163 x /= 2;
164 w /= 2;
165 }
166
167 /* adjust x,y offset for invert: */
168 if (orient & MASK_Y_INVERT)
169 y += h - 1;
170 if (orient & MASK_X_INVERT)
171 x += w - 1;
172
173 /* Note: x and y are in TILER units, not pixels */
174 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y,
175 &info->paddr);
176 info->rotation_type = OMAP_DSS_ROT_TILER;
177 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
178 /* Note: stride in TILER units, not pixels */
179 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient);
180 } else {
181 switch (state->rotation & DRM_MODE_ROTATE_MASK) {
182 case 0:
183 case DRM_MODE_ROTATE_0:
184 /* OK */
185 break;
186
187 default:
188 dev_warn(fb->dev->dev,
189 "rotation '%d' ignored for non-tiled fb\n",
190 state->rotation);
191 break;
192 }
193
194 info->paddr = get_linear_addr(fb, format, 0, x, y);
195 info->rotation_type = OMAP_DSS_ROT_NONE;
196 info->rotation = DRM_MODE_ROTATE_0;
197 info->screen_width = fb->pitches[0];
198 }
199
200 /* convert to pixels: */
201 info->screen_width /= format->cpp[0];
202
203 if (fb->format->format == DRM_FORMAT_NV12) {
204 plane = &omap_fb->planes[1];
205
206 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
207 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED));
208 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2,
209 &info->p_uv_addr);
210 } else {
211 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y);
212 }
213 } else {
214 info->p_uv_addr = 0;
215 }
216 }
217
218 /* pin, prepare for scanout: */
omap_framebuffer_pin(struct drm_framebuffer * fb)219 int omap_framebuffer_pin(struct drm_framebuffer *fb)
220 {
221 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
222 int ret, i, n = fb->format->num_planes;
223
224 mutex_lock(&omap_fb->lock);
225
226 if (omap_fb->pin_count > 0) {
227 omap_fb->pin_count++;
228 mutex_unlock(&omap_fb->lock);
229 return 0;
230 }
231
232 for (i = 0; i < n; i++) {
233 struct plane *plane = &omap_fb->planes[i];
234 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr);
235 if (ret)
236 goto fail;
237 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE);
238 }
239
240 omap_fb->pin_count++;
241
242 mutex_unlock(&omap_fb->lock);
243
244 return 0;
245
246 fail:
247 for (i--; i >= 0; i--) {
248 struct plane *plane = &omap_fb->planes[i];
249 omap_gem_unpin(fb->obj[i]);
250 plane->dma_addr = 0;
251 }
252
253 mutex_unlock(&omap_fb->lock);
254
255 return ret;
256 }
257
258 /* unpin, no longer being scanned out: */
omap_framebuffer_unpin(struct drm_framebuffer * fb)259 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
260 {
261 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
262 int i, n = fb->format->num_planes;
263
264 mutex_lock(&omap_fb->lock);
265
266 omap_fb->pin_count--;
267
268 if (omap_fb->pin_count > 0) {
269 mutex_unlock(&omap_fb->lock);
270 return;
271 }
272
273 for (i = 0; i < n; i++) {
274 struct plane *plane = &omap_fb->planes[i];
275 omap_gem_unpin(fb->obj[i]);
276 plane->dma_addr = 0;
277 }
278
279 mutex_unlock(&omap_fb->lock);
280 }
281
282 #ifdef CONFIG_DEBUG_FS
omap_framebuffer_describe(struct drm_framebuffer * fb,struct seq_file * m)283 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
284 {
285 int i, n = fb->format->num_planes;
286
287 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
288 (char *)&fb->format->format);
289
290 for (i = 0; i < n; i++) {
291 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
292 i, fb->offsets[n], fb->pitches[i]);
293 omap_gem_describe(fb->obj[i], m);
294 }
295 }
296 #endif
297
omap_framebuffer_create(struct drm_device * dev,struct drm_file * file,const struct drm_mode_fb_cmd2 * mode_cmd)298 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
299 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
300 {
301 unsigned int num_planes = drm_format_num_planes(mode_cmd->pixel_format);
302 struct drm_gem_object *bos[4];
303 struct drm_framebuffer *fb;
304 int i;
305
306 for (i = 0; i < num_planes; i++) {
307 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
308 if (!bos[i]) {
309 fb = ERR_PTR(-ENOENT);
310 goto error;
311 }
312 }
313
314 fb = omap_framebuffer_init(dev, mode_cmd, bos);
315 if (IS_ERR(fb))
316 goto error;
317
318 return fb;
319
320 error:
321 while (--i >= 0)
322 drm_gem_object_unreference_unlocked(bos[i]);
323
324 return fb;
325 }
326
omap_framebuffer_init(struct drm_device * dev,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** bos)327 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
328 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
329 {
330 const struct drm_format_info *format = NULL;
331 struct omap_framebuffer *omap_fb = NULL;
332 struct drm_framebuffer *fb = NULL;
333 unsigned int pitch = mode_cmd->pitches[0];
334 int ret, i;
335
336 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
337 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
338 (char *)&mode_cmd->pixel_format);
339
340 format = drm_format_info(mode_cmd->pixel_format);
341
342 for (i = 0; i < ARRAY_SIZE(formats); i++) {
343 if (formats[i] == mode_cmd->pixel_format)
344 break;
345 }
346
347 if (!format || i == ARRAY_SIZE(formats)) {
348 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
349 (char *)&mode_cmd->pixel_format);
350 ret = -EINVAL;
351 goto fail;
352 }
353
354 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
355 if (!omap_fb) {
356 ret = -ENOMEM;
357 goto fail;
358 }
359
360 fb = &omap_fb->base;
361 omap_fb->format = format;
362 mutex_init(&omap_fb->lock);
363
364 /*
365 * The code below assumes that no format use more than two planes, and
366 * that the two planes of multiplane formats need the same number of
367 * bytes per pixel.
368 */
369 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
370 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
371 ret = -EINVAL;
372 goto fail;
373 }
374
375 if (pitch % format->cpp[0]) {
376 dev_dbg(dev->dev,
377 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
378 pitch, format->cpp[0]);
379 ret = -EINVAL;
380 goto fail;
381 }
382
383 for (i = 0; i < format->num_planes; i++) {
384 struct plane *plane = &omap_fb->planes[i];
385 unsigned int vsub = i == 0 ? 1 : format->vsub;
386 unsigned int size;
387
388 size = pitch * mode_cmd->height / vsub;
389
390 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
391 dev_dbg(dev->dev,
392 "provided buffer object is too small! %zu < %d\n",
393 bos[i]->size - mode_cmd->offsets[i], size);
394 ret = -EINVAL;
395 goto fail;
396 }
397
398 fb->obj[i] = bos[i];
399 plane->dma_addr = 0;
400 }
401
402 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
403
404 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
405 if (ret) {
406 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
407 goto fail;
408 }
409
410 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
411
412 return fb;
413
414 fail:
415 kfree(omap_fb);
416
417 return ERR_PTR(ret);
418 }
419
