1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
4 * Author: Rob Clark <rob@ti.com>
5 */
6
7 #include <linux/dma-mapping.h>
8
9 #include <drm/drm_blend.h>
10 #include <drm/drm_modeset_helper.h>
11 #include <drm/drm_fourcc.h>
12 #include <drm/drm_framebuffer.h>
13 #include <drm/drm_gem_framebuffer_helper.h>
14
15 #include "omap_dmm_tiler.h"
16 #include "omap_drv.h"
17
18 /*
19 * framebuffer funcs
20 */
21
22 static const u32 formats[] = {
23 /* 16bpp [A]RGB: */
24 DRM_FORMAT_RGB565, /* RGB16-565 */
25 DRM_FORMAT_RGBX4444, /* RGB12x-4444 */
26 DRM_FORMAT_XRGB4444, /* xRGB12-4444 */
27 DRM_FORMAT_RGBA4444, /* RGBA12-4444 */
28 DRM_FORMAT_ARGB4444, /* ARGB16-4444 */
29 DRM_FORMAT_XRGB1555, /* xRGB15-1555 */
30 DRM_FORMAT_ARGB1555, /* ARGB16-1555 */
31 /* 24bpp RGB: */
32 DRM_FORMAT_RGB888, /* RGB24-888 */
33 /* 32bpp [A]RGB: */
34 DRM_FORMAT_RGBX8888, /* RGBx24-8888 */
35 DRM_FORMAT_XRGB8888, /* xRGB24-8888 */
36 DRM_FORMAT_RGBA8888, /* RGBA32-8888 */
37 DRM_FORMAT_ARGB8888, /* ARGB32-8888 */
38 /* YUV: */
39 DRM_FORMAT_NV12,
40 DRM_FORMAT_YUYV,
41 DRM_FORMAT_UYVY,
42 };
43
44 /* per-plane info for the fb: */
45 struct plane {
46 dma_addr_t dma_addr;
47 };
48
49 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
50
51 struct omap_framebuffer {
52 struct drm_framebuffer base;
53 int pin_count;
54 const struct drm_format_info *format;
55 struct plane planes[2];
56 /* lock for pinning (pin_count and planes.dma_addr) */
57 struct mutex lock;
58 };
59
omap_framebuffer_dirty(struct drm_framebuffer * fb,struct drm_file * file_priv,unsigned flags,unsigned color,struct drm_clip_rect * clips,unsigned num_clips)60 static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
61 struct drm_file *file_priv,
62 unsigned flags, unsigned color,
63 struct drm_clip_rect *clips,
64 unsigned num_clips)
65 {
66 struct drm_crtc *crtc;
67
68 drm_modeset_lock_all(fb->dev);
69
70 drm_for_each_crtc(crtc, fb->dev)
71 omap_crtc_flush(crtc);
72
73 drm_modeset_unlock_all(fb->dev);
74
75 return 0;
76 }
77
78 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
79 .create_handle = drm_gem_fb_create_handle,
80 .dirty = omap_framebuffer_dirty,
81 .destroy = drm_gem_fb_destroy,
82 };
83
get_linear_addr(struct drm_framebuffer * fb,const struct drm_format_info * format,int n,int x,int y)84 static u32 get_linear_addr(struct drm_framebuffer *fb,
85 const struct drm_format_info *format, int n, int x, int y)
86 {
87 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
88 struct plane *plane = &omap_fb->planes[n];
89 u32 offset;
90
91 offset = fb->offsets[n]
92 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub))
93 + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub));
94
95 return plane->dma_addr + offset;
96 }
97
omap_framebuffer_supports_rotation(struct drm_framebuffer * fb)98 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb)
99 {
100 return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK;
101 }
102
103 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */
drm_rotation_to_tiler(unsigned int drm_rot)104 static u32 drm_rotation_to_tiler(unsigned int drm_rot)
105 {
106 u32 orient;
107
108 switch (drm_rot & DRM_MODE_ROTATE_MASK) {
109 default:
110 case DRM_MODE_ROTATE_0:
111 orient = 0;
112 break;
113 case DRM_MODE_ROTATE_90:
114 orient = MASK_XY_FLIP | MASK_X_INVERT;
115 break;
116 case DRM_MODE_ROTATE_180:
117 orient = MASK_X_INVERT | MASK_Y_INVERT;
118 break;
119 case DRM_MODE_ROTATE_270:
120 orient = MASK_XY_FLIP | MASK_Y_INVERT;
121 break;
122 }
123
124 if (drm_rot & DRM_MODE_REFLECT_X)
125 orient ^= MASK_X_INVERT;
126
127 if (drm_rot & DRM_MODE_REFLECT_Y)
128 orient ^= MASK_Y_INVERT;
129
130 return orient;
131 }
132
133 /* update ovl info for scanout, handles cases of multi-planar fb's, etc.
134 */
omap_framebuffer_update_scanout(struct drm_framebuffer * fb,struct drm_plane_state * state,struct omap_overlay_info * info,struct omap_overlay_info * r_info)135 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
136 struct drm_plane_state *state,
137 struct omap_overlay_info *info,
138 struct omap_overlay_info *r_info)
139 {
140 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
141 const struct drm_format_info *format = omap_fb->format;
142 u32 x, y, orient = 0;
143
144 info->fourcc = fb->format->format;
145
146 info->pos_x = state->crtc_x;
147 info->pos_y = state->crtc_y;
148 info->out_width = state->crtc_w;
149 info->out_height = state->crtc_h;
150 info->width = state->src_w >> 16;
151 info->height = state->src_h >> 16;
152
153 /* DSS driver wants the w & h in rotated orientation */
154 if (drm_rotation_90_or_270(state->rotation))
155 swap(info->width, info->height);
156
157 x = state->src_x >> 16;
158 y = state->src_y >> 16;
159
160 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED_MASK) {
161 u32 w = state->src_w >> 16;
162 u32 h = state->src_h >> 16;
163
164 orient = drm_rotation_to_tiler(state->rotation);
165
166 /*
167 * omap_gem_rotated_paddr() wants the x & y in tiler units.
168 * Usually tiler unit size is the same as the pixel size, except
169 * for YUV422 formats, for which the tiler unit size is 32 bits
170 * and pixel size is 16 bits.
171 */
172 if (fb->format->format == DRM_FORMAT_UYVY ||
173 fb->format->format == DRM_FORMAT_YUYV) {
174 x /= 2;
175 w /= 2;
176 }
177
178 /* adjust x,y offset for invert: */
179 if (orient & MASK_Y_INVERT)
180 y += h - 1;
181 if (orient & MASK_X_INVERT)
182 x += w - 1;
183
184 /* Note: x and y are in TILER units, not pixels */
185 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y,
186 &info->paddr);
187 info->rotation_type = OMAP_DSS_ROT_TILER;
188 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
189 /* Note: stride in TILER units, not pixels */
190 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient);
191 } else {
192 switch (state->rotation & DRM_MODE_ROTATE_MASK) {
193 case 0:
194 case DRM_MODE_ROTATE_0:
195 /* OK */
196 break;
197
198 default:
199 dev_warn(fb->dev->dev,
200 "rotation '%d' ignored for non-tiled fb\n",
201 state->rotation);
202 break;
203 }
204
205 info->paddr = get_linear_addr(fb, format, 0, x, y);
206 info->rotation_type = OMAP_DSS_ROT_NONE;
207 info->rotation = DRM_MODE_ROTATE_0;
208 info->screen_width = fb->pitches[0];
209 }
210
211 /* convert to pixels: */
212 info->screen_width /= format->cpp[0];
213
214 if (fb->format->format == DRM_FORMAT_NV12) {
215 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
216 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED_MASK));
217 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2,
218 &info->p_uv_addr);
219 } else {
220 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y);
221 }
222 } else {
223 info->p_uv_addr = 0;
224 }
225
226 if (r_info) {
227 info->width /= 2;
228 info->out_width /= 2;
229
230 *r_info = *info;
231
232 if (fb->format->is_yuv) {
233 if (info->width & 1) {
234 info->width++;
235 r_info->width--;
236 }
237
238 if (info->out_width & 1) {
239 info->out_width++;
240 r_info->out_width--;
241 }
242 }
243
244 r_info->pos_x = info->pos_x + info->out_width;
245
246 r_info->paddr = get_linear_addr(fb, format, 0,
247 x + info->width, y);
248 if (fb->format->format == DRM_FORMAT_NV12) {
249 r_info->p_uv_addr =
250 get_linear_addr(fb, format, 1,
251 x + info->width, y);
252 }
253 }
254 }
255
256 /* pin, prepare for scanout: */
omap_framebuffer_pin(struct drm_framebuffer * fb)257 int omap_framebuffer_pin(struct drm_framebuffer *fb)
258 {
259 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
260 int ret, i, n = fb->format->num_planes;
261
262 mutex_lock(&omap_fb->lock);
263
264 if (omap_fb->pin_count > 0) {
265 omap_fb->pin_count++;
266 mutex_unlock(&omap_fb->lock);
267 return 0;
268 }
269
270 for (i = 0; i < n; i++) {
271 struct plane *plane = &omap_fb->planes[i];
272 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr);
273 if (ret)
274 goto fail;
275 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE);
276 }
277
278 omap_fb->pin_count++;
279
280 mutex_unlock(&omap_fb->lock);
281
282 return 0;
283
284 fail:
285 for (i--; i >= 0; i--) {
286 struct plane *plane = &omap_fb->planes[i];
287 omap_gem_unpin(fb->obj[i]);
288 plane->dma_addr = 0;
289 }
290
291 mutex_unlock(&omap_fb->lock);
292
293 return ret;
294 }
295
296 /* unpin, no longer being scanned out: */
omap_framebuffer_unpin(struct drm_framebuffer * fb)297 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
298 {
299 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
300 int i, n = fb->format->num_planes;
301
302 mutex_lock(&omap_fb->lock);
303
304 omap_fb->pin_count--;
305
306 if (omap_fb->pin_count > 0) {
307 mutex_unlock(&omap_fb->lock);
308 return;
309 }
310
311 for (i = 0; i < n; i++) {
312 struct plane *plane = &omap_fb->planes[i];
313 omap_gem_unpin(fb->obj[i]);
314 plane->dma_addr = 0;
315 }
316
317 mutex_unlock(&omap_fb->lock);
318 }
319
320 #ifdef CONFIG_DEBUG_FS
omap_framebuffer_describe(struct drm_framebuffer * fb,struct seq_file * m)321 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
322 {
323 int i, n = fb->format->num_planes;
324
325 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
326 (char *)&fb->format->format);
327
328 for (i = 0; i < n; i++) {
329 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
330 i, fb->offsets[n], fb->pitches[i]);
331 omap_gem_describe(fb->obj[i], m);
332 }
333 }
334 #endif
335
omap_framebuffer_create(struct drm_device * dev,struct drm_file * file,const struct drm_mode_fb_cmd2 * mode_cmd)336 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
337 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
338 {
339 const struct drm_format_info *info = drm_get_format_info(dev,
340 mode_cmd);
341 unsigned int num_planes = info->num_planes;
342 struct drm_gem_object *bos[4];
343 struct drm_framebuffer *fb;
344 int i;
345
346 for (i = 0; i < num_planes; i++) {
347 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
348 if (!bos[i]) {
349 fb = ERR_PTR(-ENOENT);
350 goto error;
351 }
352 }
353
354 fb = omap_framebuffer_init(dev, mode_cmd, bos);
355 if (IS_ERR(fb))
356 goto error;
357
358 return fb;
359
360 error:
361 while (--i >= 0)
362 drm_gem_object_put(bos[i]);
363
364 return fb;
365 }
366
omap_framebuffer_init(struct drm_device * dev,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** bos)367 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
368 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
369 {
370 const struct drm_format_info *format = NULL;
371 struct omap_framebuffer *omap_fb = NULL;
372 struct drm_framebuffer *fb = NULL;
373 unsigned int pitch = mode_cmd->pitches[0];
374 int ret, i;
375
376 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
377 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
378 (char *)&mode_cmd->pixel_format);
379
380 format = drm_get_format_info(dev, mode_cmd);
381
382 for (i = 0; i < ARRAY_SIZE(formats); i++) {
383 if (formats[i] == mode_cmd->pixel_format)
384 break;
385 }
386
387 if (!format || i == ARRAY_SIZE(formats)) {
388 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
389 (char *)&mode_cmd->pixel_format);
390 ret = -EINVAL;
391 goto fail;
392 }
393
394 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
395 if (!omap_fb) {
396 ret = -ENOMEM;
397 goto fail;
398 }
399
400 fb = &omap_fb->base;
401 omap_fb->format = format;
402 mutex_init(&omap_fb->lock);
403
404 /*
405 * The code below assumes that no format use more than two planes, and
406 * that the two planes of multiplane formats need the same number of
407 * bytes per pixel.
408 */
409 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
410 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
411 ret = -EINVAL;
412 goto fail;
413 }
414
415 if (pitch % format->cpp[0]) {
416 dev_dbg(dev->dev,
417 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
418 pitch, format->cpp[0]);
419 ret = -EINVAL;
420 goto fail;
421 }
422
423 for (i = 0; i < format->num_planes; i++) {
424 struct plane *plane = &omap_fb->planes[i];
425 unsigned int vsub = i == 0 ? 1 : format->vsub;
426 unsigned int size;
427
428 size = pitch * mode_cmd->height / vsub;
429
430 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
431 dev_dbg(dev->dev,
432 "provided buffer object is too small! %zu < %d\n",
433 bos[i]->size - mode_cmd->offsets[i], size);
434 ret = -EINVAL;
435 goto fail;
436 }
437
438 fb->obj[i] = bos[i];
439 plane->dma_addr = 0;
440 }
441
442 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
443
444 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
445 if (ret) {
446 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
447 goto fail;
448 }
449
450 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
451
452 return fb;
453
454 fail:
455 kfree(omap_fb);
456
457 return ERR_PTR(ret);
458 }
459