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 #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
  23 static 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: */
  46 struct plane {
  47         dma_addr_t dma_addr;
  48 };
  49
  50 #define to_omap_framebuffer(x) container_of(x, struct omap_framebuffer, base)
  51
  52 struct 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
  61 static 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
  79 static 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
  85 static 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
  99 bool 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 */
 105 static 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  */
 136 void 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: */
 258 int 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
 285 fail:
 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: */
 298 void 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
 322 void 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
 337 struct 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
 361 error:
 362         while (--i >= 0)
 363                 drm_gem_object_put(bos[i]);
 364
 365         return fb;
 366 }
 367
 368 struct 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
 455 fail:
 456         kfree(omap_fb);
 457
 458         return ERR_PTR(ret);
 459 }