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/seq_file.h> 8 9 #include <drm/drm_crtc.h> 10 #include <drm/drm_modeset_helper.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 58 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = { 59 .create_handle = drm_gem_fb_create_handle, 60 .destroy = drm_gem_fb_destroy, 61 }; 62 63 static u32 get_linear_addr(struct drm_framebuffer *fb, 64 const struct drm_format_info *format, int n, int x, int y) 65 { 66 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 67 struct plane *plane = &omap_fb->planes[n]; 68 u32 offset; 69 70 offset = fb->offsets[n] 71 + (x * format->cpp[n] / (n == 0 ? 1 : format->hsub)) 72 + (y * fb->pitches[n] / (n == 0 ? 1 : format->vsub)); 73 74 return plane->dma_addr + offset; 75 } 76 77 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb) 78 { 79 return omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED; 80 } 81 82 /* Note: DRM rotates counter-clockwise, TILER & DSS rotates clockwise */ 83 static u32 drm_rotation_to_tiler(unsigned int drm_rot) 84 { 85 u32 orient; 86 87 switch (drm_rot & DRM_MODE_ROTATE_MASK) { 88 default: 89 case DRM_MODE_ROTATE_0: 90 orient = 0; 91 break; 92 case DRM_MODE_ROTATE_90: 93 orient = MASK_XY_FLIP | MASK_X_INVERT; 94 break; 95 case DRM_MODE_ROTATE_180: 96 orient = MASK_X_INVERT | MASK_Y_INVERT; 97 break; 98 case DRM_MODE_ROTATE_270: 99 orient = MASK_XY_FLIP | MASK_Y_INVERT; 100 break; 101 } 102 103 if (drm_rot & DRM_MODE_REFLECT_X) 104 orient ^= MASK_X_INVERT; 105 106 if (drm_rot & DRM_MODE_REFLECT_Y) 107 orient ^= MASK_Y_INVERT; 108 109 return orient; 110 } 111 112 /* update ovl info for scanout, handles cases of multi-planar fb's, etc. 113 */ 114 void omap_framebuffer_update_scanout(struct drm_framebuffer *fb, 115 struct drm_plane_state *state, struct omap_overlay_info *info) 116 { 117 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 118 const struct drm_format_info *format = omap_fb->format; 119 struct plane *plane = &omap_fb->planes[0]; 120 u32 x, y, orient = 0; 121 122 info->fourcc = fb->format->format; 123 124 info->pos_x = state->crtc_x; 125 info->pos_y = state->crtc_y; 126 info->out_width = state->crtc_w; 127 info->out_height = state->crtc_h; 128 info->width = state->src_w >> 16; 129 info->height = state->src_h >> 16; 130 131 /* DSS driver wants the w & h in rotated orientation */ 132 if (drm_rotation_90_or_270(state->rotation)) 133 swap(info->width, info->height); 134 135 x = state->src_x >> 16; 136 y = state->src_y >> 16; 137 138 if (omap_gem_flags(fb->obj[0]) & OMAP_BO_TILED) { 139 u32 w = state->src_w >> 16; 140 u32 h = state->src_h >> 16; 141 142 orient = drm_rotation_to_tiler(state->rotation); 143 144 /* 145 * omap_gem_rotated_paddr() wants the x & y in tiler units. 146 * Usually tiler unit size is the same as the pixel size, except 147 * for YUV422 formats, for which the tiler unit size is 32 bits 148 * and pixel size is 16 bits. 149 */ 150 if (fb->format->format == DRM_FORMAT_UYVY || 151 fb->format->format == DRM_FORMAT_YUYV) { 152 x /= 2; 153 w /= 2; 154 } 155 156 /* adjust x,y offset for invert: */ 157 if (orient & MASK_Y_INVERT) 158 y += h - 1; 159 if (orient & MASK_X_INVERT) 160 x += w - 1; 161 162 /* Note: x and y are in TILER units, not pixels */ 163 omap_gem_rotated_dma_addr(fb->obj[0], orient, x, y, 164 &info->paddr); 165 info->rotation_type = OMAP_DSS_ROT_TILER; 166 info->rotation = state->rotation ?: DRM_MODE_ROTATE_0; 167 /* Note: stride in TILER units, not pixels */ 168 info->screen_width = omap_gem_tiled_stride(fb->obj[0], orient); 169 } else { 170 switch (state->rotation & DRM_MODE_ROTATE_MASK) { 171 case 0: 172 case DRM_MODE_ROTATE_0: 173 /* OK */ 174 break; 175 176 default: 177 dev_warn(fb->dev->dev, 178 "rotation '%d' ignored for non-tiled fb\n", 179 state->rotation); 180 break; 181 } 182 183 info->paddr = get_linear_addr(fb, format, 0, x, y); 184 info->rotation_type = OMAP_DSS_ROT_NONE; 185 info->rotation = DRM_MODE_ROTATE_0; 186 info->screen_width = fb->pitches[0]; 187 } 188 189 /* convert to pixels: */ 190 info->screen_width /= format->cpp[0]; 191 192 if (fb->format->format == DRM_FORMAT_NV12) { 193 plane = &omap_fb->planes[1]; 194 195 if (info->rotation_type == OMAP_DSS_ROT_TILER) { 196 WARN_ON(!(omap_gem_flags(fb->obj[1]) & OMAP_BO_TILED)); 197 omap_gem_rotated_dma_addr(fb->obj[1], orient, x/2, y/2, 198 &info->p_uv_addr); 199 } else { 200 info->p_uv_addr = get_linear_addr(fb, format, 1, x, y); 201 } 202 } else { 203 info->p_uv_addr = 0; 204 } 205 } 206 207 /* pin, prepare for scanout: */ 208 int omap_framebuffer_pin(struct drm_framebuffer *fb) 209 { 210 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 211 int ret, i, n = fb->format->num_planes; 212 213 mutex_lock(&omap_fb->lock); 214 215 if (omap_fb->pin_count > 0) { 216 omap_fb->pin_count++; 217 mutex_unlock(&omap_fb->lock); 218 return 0; 219 } 220 221 for (i = 0; i < n; i++) { 222 struct plane *plane = &omap_fb->planes[i]; 223 ret = omap_gem_pin(fb->obj[i], &plane->dma_addr); 224 if (ret) 225 goto fail; 226 omap_gem_dma_sync_buffer(fb->obj[i], DMA_TO_DEVICE); 227 } 228 229 omap_fb->pin_count++; 230 231 mutex_unlock(&omap_fb->lock); 232 233 return 0; 234 235 fail: 236 for (i--; i >= 0; i--) { 237 struct plane *plane = &omap_fb->planes[i]; 238 omap_gem_unpin(fb->obj[i]); 239 plane->dma_addr = 0; 240 } 241 242 mutex_unlock(&omap_fb->lock); 243 244 return ret; 245 } 246 247 /* unpin, no longer being scanned out: */ 248 void omap_framebuffer_unpin(struct drm_framebuffer *fb) 249 { 250 struct omap_framebuffer *omap_fb = to_omap_framebuffer(fb); 251 int i, n = fb->format->num_planes; 252 253 mutex_lock(&omap_fb->lock); 254 255 omap_fb->pin_count--; 256 257 if (omap_fb->pin_count > 0) { 258 mutex_unlock(&omap_fb->lock); 259 return; 260 } 261 262 for (i = 0; i < n; i++) { 263 struct plane *plane = &omap_fb->planes[i]; 264 omap_gem_unpin(fb->obj[i]); 265 plane->dma_addr = 0; 266 } 267 268 mutex_unlock(&omap_fb->lock); 269 } 270 271 #ifdef CONFIG_DEBUG_FS 272 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m) 273 { 274 int i, n = fb->format->num_planes; 275 276 seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, 277 (char *)&fb->format->format); 278 279 for (i = 0; i < n; i++) { 280 seq_printf(m, " %d: offset=%d pitch=%d, obj: ", 281 i, fb->offsets[n], fb->pitches[i]); 282 omap_gem_describe(fb->obj[i], m); 283 } 284 } 285 #endif 286 287 struct drm_framebuffer *omap_framebuffer_create(struct drm_device *dev, 288 struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd) 289 { 290 unsigned int num_planes = drm_format_num_planes(mode_cmd->pixel_format); 291 struct drm_gem_object *bos[4]; 292 struct drm_framebuffer *fb; 293 int i; 294 295 for (i = 0; i < num_planes; i++) { 296 bos[i] = drm_gem_object_lookup(file, mode_cmd->handles[i]); 297 if (!bos[i]) { 298 fb = ERR_PTR(-ENOENT); 299 goto error; 300 } 301 } 302 303 fb = omap_framebuffer_init(dev, mode_cmd, bos); 304 if (IS_ERR(fb)) 305 goto error; 306 307 return fb; 308 309 error: 310 while (--i >= 0) 311 drm_gem_object_put_unlocked(bos[i]); 312 313 return fb; 314 } 315 316 struct drm_framebuffer *omap_framebuffer_init(struct drm_device *dev, 317 const struct drm_mode_fb_cmd2 *mode_cmd, struct drm_gem_object **bos) 318 { 319 const struct drm_format_info *format = NULL; 320 struct omap_framebuffer *omap_fb = NULL; 321 struct drm_framebuffer *fb = NULL; 322 unsigned int pitch = mode_cmd->pitches[0]; 323 int ret, i; 324 325 DBG("create framebuffer: dev=%p, mode_cmd=%p (%dx%d@%4.4s)", 326 dev, mode_cmd, mode_cmd->width, mode_cmd->height, 327 (char *)&mode_cmd->pixel_format); 328 329 format = drm_format_info(mode_cmd->pixel_format); 330 331 for (i = 0; i < ARRAY_SIZE(formats); i++) { 332 if (formats[i] == mode_cmd->pixel_format) 333 break; 334 } 335 336 if (!format || i == ARRAY_SIZE(formats)) { 337 dev_dbg(dev->dev, "unsupported pixel format: %4.4s\n", 338 (char *)&mode_cmd->pixel_format); 339 ret = -EINVAL; 340 goto fail; 341 } 342 343 omap_fb = kzalloc(sizeof(*omap_fb), GFP_KERNEL); 344 if (!omap_fb) { 345 ret = -ENOMEM; 346 goto fail; 347 } 348 349 fb = &omap_fb->base; 350 omap_fb->format = format; 351 mutex_init(&omap_fb->lock); 352 353 /* 354 * The code below assumes that no format use more than two planes, and 355 * that the two planes of multiplane formats need the same number of 356 * bytes per pixel. 357 */ 358 if (format->num_planes == 2 && pitch != mode_cmd->pitches[1]) { 359 dev_dbg(dev->dev, "pitches differ between planes 0 and 1\n"); 360 ret = -EINVAL; 361 goto fail; 362 } 363 364 if (pitch % format->cpp[0]) { 365 dev_dbg(dev->dev, 366 "buffer pitch (%u bytes) is not a multiple of pixel size (%u bytes)\n", 367 pitch, format->cpp[0]); 368 ret = -EINVAL; 369 goto fail; 370 } 371 372 for (i = 0; i < format->num_planes; i++) { 373 struct plane *plane = &omap_fb->planes[i]; 374 unsigned int vsub = i == 0 ? 1 : format->vsub; 375 unsigned int size; 376 377 size = pitch * mode_cmd->height / vsub; 378 379 if (size > omap_gem_mmap_size(bos[i]) - mode_cmd->offsets[i]) { 380 dev_dbg(dev->dev, 381 "provided buffer object is too small! %zu < %d\n", 382 bos[i]->size - mode_cmd->offsets[i], size); 383 ret = -EINVAL; 384 goto fail; 385 } 386 387 fb->obj[i] = bos[i]; 388 plane->dma_addr = 0; 389 } 390 391 drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd); 392 393 ret = drm_framebuffer_init(dev, fb, &omap_framebuffer_funcs); 394 if (ret) { 395 dev_err(dev->dev, "framebuffer init failed: %d\n", ret); 396 goto fail; 397 } 398 399 DBG("create: FB ID: %d (%p)", fb->base.id, fb); 400 401 return fb; 402 403 fail: 404 kfree(omap_fb); 405 406 return ERR_PTR(ret); 407 } 408