]> Git Repo - linux.git/blob - drivers/gpu/drm/omapdrm/omap_fb.c
Merge tag 'drm-intel-next-2019-05-24' of git://anongit.freedesktop.org/drm/drm-intel...
[linux.git] / drivers / gpu / drm / omapdrm / omap_fb.c
1 /*
2  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
3  * Author: Rob Clark <[email protected]>
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_modeset_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
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
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 */
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  */
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: */
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: */
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
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
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         const struct drm_format_info *info = drm_get_format_info(dev,
302                                                                  mode_cmd);
303         unsigned int num_planes = info->num_planes;
304         struct drm_gem_object *bos[4];
305         struct drm_framebuffer *fb;
306         int i;
307
308         for (i = 0; i < num_planes; i++) {
309                 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]);
310                 if (!bos[i]) {
311                         fb = ERR_PTR(-ENOENT);
312                         goto error;
313                 }
314         }
315
316         fb = omap_framebuffer_init(dev, mode_cmd, bos);
317         if (IS_ERR(fb))
318                 goto error;
319
320         return fb;
321
322 error:
323         while (--i >= 0)
324                 drm_gem_object_put_unlocked(bos[i]);
325
326         return fb;
327 }
328
329 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev,
330                 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos)
331 {
332         const struct drm_format_info *format = NULL;
333         struct omap_framebuffer *omap_fb = NULL;
334         struct drm_framebuffer *fb = NULL;
335         unsigned int pitch = mode_cmd->pitches[0];
336         int ret, i;
337
338         DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)",
339                         dev, mode_cmd, mode_cmd->width, mode_cmd->height,
340                         (char *)&mode_cmd->pixel_format);
341
342         format = drm_get_format_info(dev, mode_cmd);
343
344         for (i = 0; i < ARRAY_SIZE(formats); i++) {
345                 if (formats[i] == mode_cmd->pixel_format)
346                         break;
347         }
348
349         if (!format || i == ARRAY_SIZE(formats)) {
350                 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n",
351                         (char *)&mode_cmd->pixel_format);
352                 ret = -EINVAL;
353                 goto fail;
354         }
355
356         omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL);
357         if (!omap_fb) {
358                 ret = -ENOMEM;
359                 goto fail;
360         }
361
362         fb = &omap_fb->base;
363         omap_fb->format = format;
364         mutex_init(&omap_fb->lock);
365
366         /*
367          * The code below assumes that no format use more than two planes, and
368          * that the two planes of multiplane formats need the same number of
369          * bytes per pixel.
370          */
371         if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) {
372                 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n");
373                 ret = -EINVAL;
374                 goto fail;
375         }
376
377         if (pitch % format->cpp[0]) {
378                 dev_dbg(dev->dev,
379                         "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n",
380                         pitch, format->cpp[0]);
381                 ret = -EINVAL;
382                 goto fail;
383         }
384
385         for (i = 0; i < format->num_planes; i++) {
386                 struct plane *plane = &omap_fb->planes[i];
387                 unsigned int vsub = i == 0 ? 1 : format->vsub;
388                 unsigned int size;
389
390                 size = pitch * mode_cmd->height / vsub;
391
392                 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) {
393                         dev_dbg(dev->dev,
394                                 "provided buffer object is too small! %zu < %d\n",
395                                 bos[i]->size - mode_cmd->offsets[i], size);
396                         ret = -EINVAL;
397                         goto fail;
398                 }
399
400                 fb->obj[i]    = bos[i];
401                 plane->dma_addr  = 0;
402         }
403
404         drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
405
406         ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs);
407         if (ret) {
408                 dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
409                 goto fail;
410         }
411
412         DBG("create: FB ID: %d (%p)", fb->base.id, fb);
413
414         return fb;
415
416 fail:
417         kfree(omap_fb);
418
419         return ERR_PTR(ret);
420 }
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