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