1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ 4 * Author: Rob Clark <rob@ti.com> 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_format_info *info, 339 const struct drm_mode_fb_cmd2 *mode_cmd) 340 { 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, info, 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_format_info *info, 369 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 370 { 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 for (i = 0; i < ARRAY_SIZE(formats); i++) { 381 if (formats[i] == mode_cmd->pixel_format) 382 break; 383 } 384 385 if (i == ARRAY_SIZE(formats)) { 386 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n", 387 (char *)&mode_cmd->pixel_format); 388 ret = -EINVAL; 389 goto fail; 390 } 391 392 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 393 if (!omap_fb) { 394 ret = -ENOMEM; 395 goto fail; 396 } 397 398 fb = &omap_fb->base; 399 omap_fb->format = info; 400 mutex_init(&omap_fb->lock); 401 402 /* 403 * The code below assumes that no format use more than two planes, and 404 * that the two planes of multiplane formats need the same number of 405 * bytes per pixel. 406 */ 407 if (info->num_planes == 2 && pitch != mode_cmd->pitches[1]) { 408 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n"); 409 ret = -EINVAL; 410 goto fail; 411 } 412 413 if (pitch % info->cpp[0]) { 414 dev_dbg(dev->dev, 415 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n", 416 pitch, info->cpp[0]); 417 ret = -EINVAL; 418 goto fail; 419 } 420 421 for (i = 0; i < info->num_planes; i++) { 422 struct plane *plane = &omap_fb->planes[i]; 423 unsigned int vsub = i == 0 ? 1 : info->vsub; 424 unsigned int size; 425 426 size = pitch * mode_cmd->height / vsub; 427 428 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) { 429 dev_dbg(dev->dev, 430 "provided buffer object is too small! %zu < %d\n", 431 bos[i]->size - mode_cmd->offsets[i], size); 432 ret = -EINVAL; 433 goto fail; 434 } 435 436 fb->obj[i] = bos[i]; 437 plane->dma_addr = 0; 438 } 439 440 drm_helper_mode_fill_fb_struct(dev, fb, info, mode_cmd); 441 442 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 443 if (ret) { 444 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 445 goto fail; 446 } 447 448 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 449 450 return fb; 451 452 fail: 453 kfree(omap_fb); 454 455 return ERR_PTR(ret); 456 } 457