drivers/gpu/drm/omapdrm/omap_fb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
   4  * Author: Rob Clark <[email protected]>
   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
  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
  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
  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 */
 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  */
 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: */
 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: */
 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
 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
 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
 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 }