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