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;
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 struct plane *plane = &omap_fb->planes[0];
139 u32 x, y, orient = 0;
140
141 info->fourcc = fb->format->format;
142
143 info->pos_x = state->crtc_x;
144 info->pos_y = state->crtc_y;
145 info->out_width = state->crtc_w;
146 info->out_height = state->crtc_h;
147 info->width = state->src_w >> 16;
148 info->height = state->src_h >> 16;
149
150 /* DSS driver wants the w & h in rotated orientation */
151 if (drm_rotation_90_or_270(state->rotation))
152 swap(info->width, info->height);
153
154 x = state->src_x >> 16;
155 y = state->src_y >> 16;
156
157 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED) {
158 u32 w = state->src_w >> 16;
159 u32 h = state->src_h >> 16;
160
161 orient = drm_rotation_to_tiler(state->rotation);
162
163 /*
164 * omap_gem_rotated_paddr() wants the x & y in tiler units.
165 * Usually tiler unit size is the same as the pixel size, except
166 * for YUV422 formats, for which the tiler unit size is 32 bits
167 * and pixel size is 16 bits.
168 */
169 if (fb->format->format == DRM_FORMAT_UYVY ||
170 fb->format->format == DRM_FORMAT_YUYV) {
171 x /= 2;
172 w /= 2;
173 }
174
175 /* adjust x,y offset for invert: */
176 if (orient & MASK_Y_INVERT)
177 y += h - 1;
178 if (orient & MASK_X_INVERT)
179 x += w - 1;
180
181 /* Note: x and y are in TILER units, not pixels */
182 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y,
183 &info->paddr);
184 info->rotation_type = OMAP_DSS_ROT_TILER;
185 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0;
186 /* Note: stride in TILER units, not pixels */
187 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient);
188 } else {
189 switch (state->rotation & DRM_MODE_ROTATE_MASK) {
190 case 0:
191 case DRM_MODE_ROTATE_0:
192 /* OK */
193 break;
194
195 default:
196 dev_warn(fb->dev->dev,
197 "rotation '%d' ignored for non-tiled fb\n",
198 state->rotation);
199 break;
200 }
201
202 info->paddr = get_linear_addr(fb, format, 0, x, y);
203 info->rotation_type = OMAP_DSS_ROT_NONE;
204 info->rotation = DRM_MODE_ROTATE_0;
205 info->screen_width = fb->pitches[0];
206 }
207
208 /* convert to pixels: */
209 info->screen_width /= format->cpp[0];
210
211 if (fb->format->format == DRM_FORMAT_NV12) {
212 plane = &omap_fb->planes[1];
213
214 if (info->rotation_type == OMAP_DSS_ROT_TILER) {
215 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED));
216 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2,
217 &info->p_uv_addr);
218 } else {
219 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y);
220 }
221 } else {
222 info->p_uv_addr = 0;
223 }
224 }
225
226 /* pin, prepare for scanout: */
omap_framebuffer_pin(struct drm_framebuffer * fb)227 int omap_framebuffer_pin(struct drm_framebuffer *fb)
228 {
229 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
230 int ret, i, n = fb->format->num_planes;
231
232 mutex_lock(&omap_fb->lock);
233
234 if (omap_fb->pin_count > 0) {
235 omap_fb->pin_count++;
236 mutex_unlock(&omap_fb->lock);
237 return 0;
238 }
239
240 for (i = 0; i < n; i++) {
241 struct plane *plane = &omap_fb->planes[i];
242 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr);
243 if (ret)
244 goto fail;
245 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE);
246 }
247
248 omap_fb->pin_count++;
249
250 mutex_unlock(&omap_fb->lock);
251
252 return 0;
253
254 fail:
255 for (i--; i >= 0; i--) {
256 struct plane *plane = &omap_fb->planes[i];
257 omap_gem_unpin(fb->obj[i]);
258 plane->dma_addr = 0;
259 }
260
261 mutex_unlock(&omap_fb->lock);
262
263 return ret;
264 }
265
266 /* unpin, no longer being scanned out: */
omap_framebuffer_unpin(struct drm_framebuffer * fb)267 void omap_framebuffer_unpin(struct drm_framebuffer *fb)
268 {
269 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb);
270 int i, n = fb->format->num_planes;
271
272 mutex_lock(&omap_fb->lock);
273
274 omap_fb->pin_count--;
275
276 if (omap_fb->pin_count > 0) {
277 mutex_unlock(&omap_fb->lock);
278 return;
279 }
280
281 for (i = 0; i < n; i++) {
282 struct plane *plane = &omap_fb->planes[i];
283 omap_gem_unpin(fb->obj[i]);
284 plane->dma_addr = 0;
285 }
286
287 mutex_unlock(&omap_fb->lock);
288 }
289
290 #ifdef CONFIG_DEBUG_FS
omap_framebuffer_describe(struct drm_framebuffer * fb,struct seq_file * m)291 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
292 {
293 int i, n = fb->format->num_planes;
294
295 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
296 (char *)&fb->format->format);
297
298 for (i = 0; i < n; i++) {
299 seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
300 i, fb->offsets[n], fb->pitches[i]);
301 omap_gem_describe(fb->obj[i], m);
302 }
303 }
304 #endif
305
omap_framebuffer_create(struct drm_device * dev,struct drm_file * file,const struct drm_mode_fb_cmd2 * mode_cmd)306 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev,
307 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd)
308 {
309 const struct drm_format_info *info = drm_get_format_info(dev,
310 mode_cmd);
311 unsigned int num_planes = info->num_planes;
312 struct drm_gem_object *bos[4];
313 struct drm_framebuffer *fb;
314 int i;
315
316 for (i = 0; i < num_planes; i++) {
317 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
318 if (!bos[i]) {
319 fb = ERR_PTR(-ENOENT);
320 goto error;
321 }
322 }
323
324 fb = omap_framebuffer_init(dev, mode_cmd, bos);
325 if (IS_ERR(fb))
326 goto error;
327
328 return fb;
329
330 error:
331 while (--i >= 0)
332 drm_gem_object_put_unlocked(bos[i]);
333
334 return fb;
335 }
336
omap_framebuffer_init(struct drm_device * dev,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** bos)337 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
338 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
339 {
340 const struct drm_format_info *format = NULL;
341 struct omap_framebuffer *omap_fb = NULL;
342 struct drm_framebuffer *fb = NULL;
343 unsigned int pitch = mode_cmd->pitches[0];
344 int ret, i;
345
346 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
347 dev, mode_cmd, mode_cmd->width, mode_cmd->height,
348 (char *)&mode_cmd->pixel_format);
349
350 format = drm_get_format_info(dev, mode_cmd);
351
352 for (i = 0; i < ARRAY_SIZE(formats); i++) {
353 if (formats[i] == mode_cmd->pixel_format)
354 break;
355 }
356
357 if (!format || i == ARRAY_SIZE(formats)) {
358 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
359 (char *)&mode_cmd->pixel_format);
360 ret = -EINVAL;
361 goto fail;
362 }
363
364 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
365 if (!omap_fb) {
366 ret = -ENOMEM;
367 goto fail;
368 }
369
370 fb = &omap_fb->base;
371 omap_fb->format = format;
372 mutex_init(&omap_fb->lock);
373
374 /*
375 * The code below assumes that no format use more than two planes, and
376 * that the two planes of multiplane formats need the same number of
377 * bytes per pixel.
378 */
379 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
380 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
381 ret = -EINVAL;
382 goto fail;
383 }
384
385 if (pitch % format->cpp[0]) {
386 dev_dbg(dev->dev,
387 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
388 pitch, format->cpp[0]);
389 ret = -EINVAL;
390 goto fail;
391 }
392
393 for (i = 0; i < format->num_planes; i++) {
394 struct plane *plane = &omap_fb->planes[i];
395 unsigned int vsub = i == 0 ? 1 : format->vsub;
396 unsigned int size;
397
398 size = pitch * mode_cmd->height / vsub;
399
400 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
401 dev_dbg(dev->dev,
402 "provided buffer object is too small! %zu < %d\n",
403 bos[i]->size - mode_cmd->offsets[i], size);
404 ret = -EINVAL;
405 goto fail;
406 }
407
408 fb->obj[i] = bos[i];
409 plane->dma_addr = 0;
410 }
411
412 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
413
414 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
415 if (ret) {
416 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
417 goto fail;
418 }
419
420 DBG("create: FB ID: %d (%p)", fb->base.id, fb);
421
422 return fb;
423
424 fail:
425 kfree(omap_fb);
426
427 return ERR_PTR(ret);
428 }
429
