1 /* 2 * Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com> 3 * 4 * Permission to use, copy, modify, distribute, and sell this software and its 5 * documentation for any purpose is hereby granted without fee, provided that 6 * the above copyright notice appear in all copies and that both that copyright 7 * notice and this permission notice appear in supporting documentation, and 8 * that the name of the copyright holders not be used in advertising or 9 * publicity pertaining to distribution of the software without specific, 10 * written prior permission. The copyright holders make no representations 11 * about the suitability of this software for any purpose. It is provided "as 12 * is" without express or implied warranty. 13 * 14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 20 * OF THIS SOFTWARE. 21 */ 22 #ifndef __DRM_FOURCC_H__ 23 #define __DRM_FOURCC_H__ 24 25 #include <linux/types.h> 26 #include <uapi/drm/drm_fourcc.h> 27 28 /* 29 * DRM formats are little endian. Define host endian variants for the 30 * most common formats here, to reduce the #ifdefs needed in drivers. 31 * 32 * Note that the DRM_FORMAT_BIG_ENDIAN flag should only be used in 33 * case the format can't be specified otherwise, so we don't end up 34 * with two values describing the same format. 35 */ 36 #ifdef __BIG_ENDIAN 37 # define DRM_FORMAT_HOST_XRGB1555 (DRM_FORMAT_XRGB1555 | \ 38 DRM_FORMAT_BIG_ENDIAN) 39 # define DRM_FORMAT_HOST_RGB565 (DRM_FORMAT_RGB565 | \ 40 DRM_FORMAT_BIG_ENDIAN) 41 # define DRM_FORMAT_HOST_XRGB8888 DRM_FORMAT_BGRX8888 42 # define DRM_FORMAT_HOST_ARGB8888 DRM_FORMAT_BGRA8888 43 #else 44 # define DRM_FORMAT_HOST_XRGB1555 DRM_FORMAT_XRGB1555 45 # define DRM_FORMAT_HOST_RGB565 DRM_FORMAT_RGB565 46 # define DRM_FORMAT_HOST_XRGB8888 DRM_FORMAT_XRGB8888 47 # define DRM_FORMAT_HOST_ARGB8888 DRM_FORMAT_ARGB8888 48 #endif 49 50 struct drm_device; 51 struct drm_mode_fb_cmd2; 52 53 /** 54 * struct drm_format_info - information about a DRM format 55 */ 56 struct drm_format_info { 57 /** @format: 4CC format identifier (DRM_FORMAT_*) */ 58 u32 format; 59 60 /** 61 * @depth: 62 * 63 * Color depth (number of bits per pixel excluding padding bits), 64 * valid for a subset of RGB formats only. This is a legacy field, do 65 * not use in new code and set to 0 for new formats. 66 */ 67 u8 depth; 68 69 /** @num_planes: Number of color planes (1 to 3) */ 70 u8 num_planes; 71 72 union { 73 /** 74 * @cpp: 75 * 76 * Number of bytes per pixel (per plane), this is aliased with 77 * @char_per_block. It is deprecated in favour of using the 78 * triplet @char_per_block, @block_w, @block_h for better 79 * describing the pixel format. 80 */ 81 u8 cpp[3]; 82 83 /** 84 * @char_per_block: 85 * 86 * Number of bytes per block (per plane), where blocks are 87 * defined as a rectangle of pixels which are stored next to 88 * each other in a byte aligned memory region. Together with 89 * @block_w and @block_h this is used to properly describe tiles 90 * in tiled formats or to describe groups of pixels in packed 91 * formats for which the memory needed for a single pixel is not 92 * byte aligned. 93 * 94 * @cpp has been kept for historical reasons because there are 95 * a lot of places in drivers where it's used. In drm core for 96 * generic code paths the preferred way is to use 97 * @char_per_block, drm_format_info_block_width() and 98 * drm_format_info_block_height() which allows handling both 99 * block and non-block formats in the same way. 100 * 101 * For formats that are intended to be used only with non-linear 102 * modifiers both @cpp and @char_per_block must be 0 in the 103 * generic format table. Drivers could supply accurate 104 * information from their drm_mode_config.get_format_info hook 105 * if they want the core to be validating the pitch. 106 */ 107 u8 char_per_block[3]; 108 }; 109 110 /** 111 * @block_w: 112 * 113 * Block width in pixels, this is intended to be accessed through 114 * drm_format_info_block_width() 115 */ 116 u8 block_w[3]; 117 118 /** 119 * @block_h: 120 * 121 * Block height in pixels, this is intended to be accessed through 122 * drm_format_info_block_height() 123 */ 124 u8 block_h[3]; 125 126 /** @hsub: Horizontal chroma subsampling factor */ 127 u8 hsub; 128 /** @vsub: Vertical chroma subsampling factor */ 129 u8 vsub; 130 131 /** @has_alpha: Does the format embeds an alpha component? */ 132 bool has_alpha; 133 134 /** @is_yuv: Is it a YUV format? */ 135 bool is_yuv; 136 }; 137 138 /** 139 * struct drm_format_name_buf - name of a DRM format 140 * @str: string buffer containing the format name 141 */ 142 struct drm_format_name_buf { 143 char str[32]; 144 }; 145 146 /** 147 * drm_format_info_is_yuv_packed - check that the format info matches a YUV 148 * format with data laid in a single plane 149 * @info: format info 150 * 151 * Returns: 152 * A boolean indicating whether the format info matches a packed YUV format. 153 */ 154 static inline bool 155 drm_format_info_is_yuv_packed(const struct drm_format_info *info) 156 { 157 return info->is_yuv && info->num_planes == 1; 158 } 159 160 /** 161 * drm_format_info_is_yuv_semiplanar - check that the format info matches a YUV 162 * format with data laid in two planes (luminance and chrominance) 163 * @info: format info 164 * 165 * Returns: 166 * A boolean indicating whether the format info matches a semiplanar YUV format. 167 */ 168 static inline bool 169 drm_format_info_is_yuv_semiplanar(const struct drm_format_info *info) 170 { 171 return info->is_yuv && info->num_planes == 2; 172 } 173 174 /** 175 * drm_format_info_is_yuv_planar - check that the format info matches a YUV 176 * format with data laid in three planes (one for each YUV component) 177 * @info: format info 178 * 179 * Returns: 180 * A boolean indicating whether the format info matches a planar YUV format. 181 */ 182 static inline bool 183 drm_format_info_is_yuv_planar(const struct drm_format_info *info) 184 { 185 return info->is_yuv && info->num_planes == 3; 186 } 187 188 /** 189 * drm_format_info_is_yuv_sampling_410 - check that the format info matches a 190 * YUV format with 4:1:0 sub-sampling 191 * @info: format info 192 * 193 * Returns: 194 * A boolean indicating whether the format info matches a YUV format with 4:1:0 195 * sub-sampling. 196 */ 197 static inline bool 198 drm_format_info_is_yuv_sampling_410(const struct drm_format_info *info) 199 { 200 return info->is_yuv && info->hsub == 4 && info->vsub == 4; 201 } 202 203 /** 204 * drm_format_info_is_yuv_sampling_411 - check that the format info matches a 205 * YUV format with 4:1:1 sub-sampling 206 * @info: format info 207 * 208 * Returns: 209 * A boolean indicating whether the format info matches a YUV format with 4:1:1 210 * sub-sampling. 211 */ 212 static inline bool 213 drm_format_info_is_yuv_sampling_411(const struct drm_format_info *info) 214 { 215 return info->is_yuv && info->hsub == 4 && info->vsub == 1; 216 } 217 218 /** 219 * drm_format_info_is_yuv_sampling_420 - check that the format info matches a 220 * YUV format with 4:2:0 sub-sampling 221 * @info: format info 222 * 223 * Returns: 224 * A boolean indicating whether the format info matches a YUV format with 4:2:0 225 * sub-sampling. 226 */ 227 static inline bool 228 drm_format_info_is_yuv_sampling_420(const struct drm_format_info *info) 229 { 230 return info->is_yuv && info->hsub == 2 && info->vsub == 2; 231 } 232 233 /** 234 * drm_format_info_is_yuv_sampling_422 - check that the format info matches a 235 * YUV format with 4:2:2 sub-sampling 236 * @info: format info 237 * 238 * Returns: 239 * A boolean indicating whether the format info matches a YUV format with 4:2:2 240 * sub-sampling. 241 */ 242 static inline bool 243 drm_format_info_is_yuv_sampling_422(const struct drm_format_info *info) 244 { 245 return info->is_yuv && info->hsub == 2 && info->vsub == 1; 246 } 247 248 /** 249 * drm_format_info_is_yuv_sampling_444 - check that the format info matches a 250 * YUV format with 4:4:4 sub-sampling 251 * @info: format info 252 * 253 * Returns: 254 * A boolean indicating whether the format info matches a YUV format with 4:4:4 255 * sub-sampling. 256 */ 257 static inline bool 258 drm_format_info_is_yuv_sampling_444(const struct drm_format_info *info) 259 { 260 return info->is_yuv && info->hsub == 1 && info->vsub == 1; 261 } 262 263 /** 264 * drm_format_info_plane_width - width of the plane given the first plane 265 * @info: pixel format info 266 * @width: width of the first plane 267 * @plane: plane index 268 * 269 * Returns: 270 * The width of @plane, given that the width of the first plane is @width. 271 */ 272 static inline 273 int drm_format_info_plane_width(const struct drm_format_info *info, int width, 274 int plane) 275 { 276 if (!info || plane >= info->num_planes) 277 return 0; 278 279 if (plane == 0) 280 return width; 281 282 return width / info->hsub; 283 } 284 285 /** 286 * drm_format_info_plane_height - height of the plane given the first plane 287 * @info: pixel format info 288 * @height: height of the first plane 289 * @plane: plane index 290 * 291 * Returns: 292 * The height of @plane, given that the height of the first plane is @height. 293 */ 294 static inline 295 int drm_format_info_plane_height(const struct drm_format_info *info, int height, 296 int plane) 297 { 298 if (!info || plane >= info->num_planes) 299 return 0; 300 301 if (plane == 0) 302 return height; 303 304 return height / info->vsub; 305 } 306 307 const struct drm_format_info *__drm_format_info(u32 format); 308 const struct drm_format_info *drm_format_info(u32 format); 309 const struct drm_format_info * 310 drm_get_format_info(struct drm_device *dev, 311 const struct drm_mode_fb_cmd2 *mode_cmd); 312 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth); 313 uint32_t drm_driver_legacy_fb_format(struct drm_device *dev, 314 uint32_t bpp, uint32_t depth); 315 unsigned int drm_format_info_block_width(const struct drm_format_info *info, 316 int plane); 317 unsigned int drm_format_info_block_height(const struct drm_format_info *info, 318 int plane); 319 uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, 320 int plane, unsigned int buffer_width); 321 const char *drm_get_format_name(uint32_t format, struct drm_format_name_buf *buf); 322 323 #endif /* __DRM_FOURCC_H__ */ 324