1 /* 2 * Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com> 3 * 4 * DRM core format related functions 5 * 6 * Permission to use, copy, modify, distribute, and sell this software and its 7 * documentation for any purpose is hereby granted without fee, provided that 8 * the above copyright notice appear in all copies and that both that copyright 9 * notice and this permission notice appear in supporting documentation, and 10 * that the name of the copyright holders not be used in advertising or 11 * publicity pertaining to distribution of the software without specific, 12 * written prior permission. The copyright holders make no representations 13 * about the suitability of this software for any purpose. It is provided "as 14 * is" without express or implied warranty. 15 * 16 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 17 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 18 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 19 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 20 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 21 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 22 * OF THIS SOFTWARE. 23 */ 24 25 #include <linux/bug.h> 26 #include <linux/ctype.h> 27 #include <linux/export.h> 28 #include <linux/kernel.h> 29 30 #include <drm/drm_device.h> 31 #include <drm/drm_fourcc.h> 32 33 /** 34 * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description 35 * @bpp: bits per pixels 36 * @depth: bit depth per pixel 37 * 38 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 39 * Useful in fbdev emulation code, since that deals in those values. 40 */ 41 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) 42 { 43 uint32_t fmt = DRM_FORMAT_INVALID; 44 45 switch (bpp) { 46 case 8: 47 if (depth == 8) 48 fmt = DRM_FORMAT_C8; 49 break; 50 51 case 16: 52 switch (depth) { 53 case 15: 54 fmt = DRM_FORMAT_XRGB1555; 55 break; 56 case 16: 57 fmt = DRM_FORMAT_RGB565; 58 break; 59 default: 60 break; 61 } 62 break; 63 64 case 24: 65 if (depth == 24) 66 fmt = DRM_FORMAT_RGB888; 67 break; 68 69 case 32: 70 switch (depth) { 71 case 24: 72 fmt = DRM_FORMAT_XRGB8888; 73 break; 74 case 30: 75 fmt = DRM_FORMAT_XRGB2101010; 76 break; 77 case 32: 78 fmt = DRM_FORMAT_ARGB8888; 79 break; 80 default: 81 break; 82 } 83 break; 84 85 default: 86 break; 87 } 88 89 return fmt; 90 } 91 EXPORT_SYMBOL(drm_mode_legacy_fb_format); 92 93 /** 94 * drm_driver_legacy_fb_format - compute drm fourcc code from legacy description 95 * @dev: DRM device 96 * @bpp: bits per pixels 97 * @depth: bit depth per pixel 98 * 99 * Computes a drm fourcc pixel format code for the given @bpp/@depth values. 100 * Unlike drm_mode_legacy_fb_format() this looks at the drivers mode_config, 101 * and depending on the &drm_mode_config.quirk_addfb_prefer_host_byte_order flag 102 * it returns little endian byte order or host byte order framebuffer formats. 103 */ 104 uint32_t drm_driver_legacy_fb_format(struct drm_device *dev, 105 uint32_t bpp, uint32_t depth) 106 { 107 uint32_t fmt = drm_mode_legacy_fb_format(bpp, depth); 108 109 if (dev->mode_config.quirk_addfb_prefer_host_byte_order) { 110 if (fmt == DRM_FORMAT_XRGB8888) 111 fmt = DRM_FORMAT_HOST_XRGB8888; 112 if (fmt == DRM_FORMAT_ARGB8888) 113 fmt = DRM_FORMAT_HOST_ARGB8888; 114 if (fmt == DRM_FORMAT_RGB565) 115 fmt = DRM_FORMAT_HOST_RGB565; 116 if (fmt == DRM_FORMAT_XRGB1555) 117 fmt = DRM_FORMAT_HOST_XRGB1555; 118 } 119 120 if (dev->mode_config.quirk_addfb_prefer_xbgr_30bpp && 121 fmt == DRM_FORMAT_XRGB2101010) 122 fmt = DRM_FORMAT_XBGR2101010; 123 124 return fmt; 125 } 126 EXPORT_SYMBOL(drm_driver_legacy_fb_format); 127 128 /* 129 * Internal function to query information for a given format. See 130 * drm_format_info() for the public API. 131 */ 132 const struct drm_format_info *__drm_format_info(u32 format) 133 { 134 static const struct drm_format_info formats[] = { 135 { .format = DRM_FORMAT_C8, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 }, 136 { .format = DRM_FORMAT_RGB332, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 }, 137 { .format = DRM_FORMAT_BGR233, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 }, 138 { .format = DRM_FORMAT_XRGB4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 139 { .format = DRM_FORMAT_XBGR4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 140 { .format = DRM_FORMAT_RGBX4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 141 { .format = DRM_FORMAT_BGRX4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 142 { .format = DRM_FORMAT_ARGB4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 143 { .format = DRM_FORMAT_ABGR4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 144 { .format = DRM_FORMAT_RGBA4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 145 { .format = DRM_FORMAT_BGRA4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 146 { .format = DRM_FORMAT_XRGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 147 { .format = DRM_FORMAT_XBGR1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 148 { .format = DRM_FORMAT_RGBX5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 149 { .format = DRM_FORMAT_BGRX5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 150 { .format = DRM_FORMAT_ARGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 151 { .format = DRM_FORMAT_ABGR1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 152 { .format = DRM_FORMAT_RGBA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 153 { .format = DRM_FORMAT_BGRA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 154 { .format = DRM_FORMAT_RGB565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 155 { .format = DRM_FORMAT_BGR565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 156 { .format = DRM_FORMAT_RGB888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 }, 157 { .format = DRM_FORMAT_BGR888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 }, 158 { .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 159 { .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 160 { .format = DRM_FORMAT_RGBX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 161 { .format = DRM_FORMAT_BGRX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 162 { .format = DRM_FORMAT_RGB565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 163 { .format = DRM_FORMAT_BGR565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 164 { .format = DRM_FORMAT_XRGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 165 { .format = DRM_FORMAT_XBGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 166 { .format = DRM_FORMAT_RGBX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 167 { .format = DRM_FORMAT_BGRX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 168 { .format = DRM_FORMAT_ARGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 169 { .format = DRM_FORMAT_ABGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 170 { .format = DRM_FORMAT_RGBA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 171 { .format = DRM_FORMAT_BGRA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 172 { .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 173 { .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 174 { .format = DRM_FORMAT_RGBA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 175 { .format = DRM_FORMAT_BGRA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 176 { .format = DRM_FORMAT_XRGB16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 }, 177 { .format = DRM_FORMAT_XBGR16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 }, 178 { .format = DRM_FORMAT_ARGB16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 179 { .format = DRM_FORMAT_ABGR16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 180 { .format = DRM_FORMAT_AXBXGXRX106106106106, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 181 { .format = DRM_FORMAT_RGB888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 182 { .format = DRM_FORMAT_BGR888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 183 { .format = DRM_FORMAT_XRGB8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 184 { .format = DRM_FORMAT_XBGR8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 185 { .format = DRM_FORMAT_RGBX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 186 { .format = DRM_FORMAT_BGRX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 187 { .format = DRM_FORMAT_YUV410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4, .is_yuv = true }, 188 { .format = DRM_FORMAT_YVU410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4, .is_yuv = true }, 189 { .format = DRM_FORMAT_YUV411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1, .is_yuv = true }, 190 { .format = DRM_FORMAT_YVU411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1, .is_yuv = true }, 191 { .format = DRM_FORMAT_YUV420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2, .is_yuv = true }, 192 { .format = DRM_FORMAT_YVU420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2, .is_yuv = true }, 193 { .format = DRM_FORMAT_YUV422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 194 { .format = DRM_FORMAT_YVU422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 195 { .format = DRM_FORMAT_YUV444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 196 { .format = DRM_FORMAT_YVU444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 197 { .format = DRM_FORMAT_NV12, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true }, 198 { .format = DRM_FORMAT_NV21, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true }, 199 { .format = DRM_FORMAT_NV16, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 200 { .format = DRM_FORMAT_NV61, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 201 { .format = DRM_FORMAT_NV24, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 202 { .format = DRM_FORMAT_NV42, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 203 { .format = DRM_FORMAT_YUYV, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 204 { .format = DRM_FORMAT_YVYU, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 205 { .format = DRM_FORMAT_UYVY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 206 { .format = DRM_FORMAT_VYUY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 207 { .format = DRM_FORMAT_XYUV8888, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 208 { .format = DRM_FORMAT_VUY888, .depth = 0, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 209 { .format = DRM_FORMAT_AYUV, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, 210 { .format = DRM_FORMAT_Y210, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 211 { .format = DRM_FORMAT_Y212, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 212 { .format = DRM_FORMAT_Y216, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 213 { .format = DRM_FORMAT_Y410, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, 214 { .format = DRM_FORMAT_Y412, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, 215 { .format = DRM_FORMAT_Y416, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, 216 { .format = DRM_FORMAT_XVYU2101010, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 217 { .format = DRM_FORMAT_XVYU12_16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 218 { .format = DRM_FORMAT_XVYU16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 219 { .format = DRM_FORMAT_Y0L0, .depth = 0, .num_planes = 1, 220 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, 221 .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true }, 222 { .format = DRM_FORMAT_X0L0, .depth = 0, .num_planes = 1, 223 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, 224 .hsub = 2, .vsub = 2, .is_yuv = true }, 225 { .format = DRM_FORMAT_Y0L2, .depth = 0, .num_planes = 1, 226 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, 227 .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true }, 228 { .format = DRM_FORMAT_X0L2, .depth = 0, .num_planes = 1, 229 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, 230 .hsub = 2, .vsub = 2, .is_yuv = true }, 231 { .format = DRM_FORMAT_P010, .depth = 0, .num_planes = 2, 232 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, 233 .hsub = 2, .vsub = 2, .is_yuv = true}, 234 { .format = DRM_FORMAT_P012, .depth = 0, .num_planes = 2, 235 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, 236 .hsub = 2, .vsub = 2, .is_yuv = true}, 237 { .format = DRM_FORMAT_P016, .depth = 0, .num_planes = 2, 238 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, 239 .hsub = 2, .vsub = 2, .is_yuv = true}, 240 { .format = DRM_FORMAT_P210, .depth = 0, 241 .num_planes = 2, .char_per_block = { 2, 4, 0 }, 242 .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2, 243 .vsub = 1, .is_yuv = true }, 244 { .format = DRM_FORMAT_VUY101010, .depth = 0, 245 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 1, .vsub = 1, 246 .is_yuv = true }, 247 { .format = DRM_FORMAT_YUV420_8BIT, .depth = 0, 248 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 2, .vsub = 2, 249 .is_yuv = true }, 250 { .format = DRM_FORMAT_YUV420_10BIT, .depth = 0, 251 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 2, .vsub = 2, 252 .is_yuv = true }, 253 { .format = DRM_FORMAT_NV15, .depth = 0, 254 .num_planes = 2, .char_per_block = { 5, 5, 0 }, 255 .block_w = { 4, 2, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2, 256 .vsub = 2, .is_yuv = true }, 257 { .format = DRM_FORMAT_Q410, .depth = 0, 258 .num_planes = 3, .char_per_block = { 2, 2, 2 }, 259 .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0, 260 .vsub = 0, .is_yuv = true }, 261 { .format = DRM_FORMAT_Q401, .depth = 0, 262 .num_planes = 3, .char_per_block = { 2, 2, 2 }, 263 .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0, 264 .vsub = 0, .is_yuv = true }, 265 }; 266 267 unsigned int i; 268 269 for (i = 0; i < ARRAY_SIZE(formats); ++i) { 270 if (formats[i].format == format) 271 return &formats[i]; 272 } 273 274 return NULL; 275 } 276 277 /** 278 * drm_format_info - query information for a given format 279 * @format: pixel format (DRM_FORMAT_*) 280 * 281 * The caller should only pass a supported pixel format to this function. 282 * Unsupported pixel formats will generate a warning in the kernel log. 283 * 284 * Returns: 285 * The instance of struct drm_format_info that describes the pixel format, or 286 * NULL if the format is unsupported. 287 */ 288 const struct drm_format_info *drm_format_info(u32 format) 289 { 290 const struct drm_format_info *info; 291 292 info = __drm_format_info(format); 293 WARN_ON(!info); 294 return info; 295 } 296 EXPORT_SYMBOL(drm_format_info); 297 298 /** 299 * drm_get_format_info - query information for a given framebuffer configuration 300 * @dev: DRM device 301 * @mode_cmd: metadata from the userspace fb creation request 302 * 303 * Returns: 304 * The instance of struct drm_format_info that describes the pixel format, or 305 * NULL if the format is unsupported. 306 */ 307 const struct drm_format_info * 308 drm_get_format_info(struct drm_device *dev, 309 const struct drm_mode_fb_cmd2 *mode_cmd) 310 { 311 const struct drm_format_info *info = NULL; 312 313 if (dev->mode_config.funcs->get_format_info) 314 info = dev->mode_config.funcs->get_format_info(mode_cmd); 315 316 if (!info) 317 info = drm_format_info(mode_cmd->pixel_format); 318 319 return info; 320 } 321 EXPORT_SYMBOL(drm_get_format_info); 322 323 /** 324 * drm_format_info_block_width - width in pixels of block. 325 * @info: pixel format info 326 * @plane: plane index 327 * 328 * Returns: 329 * The width in pixels of a block, depending on the plane index. 330 */ 331 unsigned int drm_format_info_block_width(const struct drm_format_info *info, 332 int plane) 333 { 334 if (!info || plane < 0 || plane >= info->num_planes) 335 return 0; 336 337 if (!info->block_w[plane]) 338 return 1; 339 return info->block_w[plane]; 340 } 341 EXPORT_SYMBOL(drm_format_info_block_width); 342 343 /** 344 * drm_format_info_block_height - height in pixels of a block 345 * @info: pixel format info 346 * @plane: plane index 347 * 348 * Returns: 349 * The height in pixels of a block, depending on the plane index. 350 */ 351 unsigned int drm_format_info_block_height(const struct drm_format_info *info, 352 int plane) 353 { 354 if (!info || plane < 0 || plane >= info->num_planes) 355 return 0; 356 357 if (!info->block_h[plane]) 358 return 1; 359 return info->block_h[plane]; 360 } 361 EXPORT_SYMBOL(drm_format_info_block_height); 362 363 /** 364 * drm_format_info_min_pitch - computes the minimum required pitch in bytes 365 * @info: pixel format info 366 * @plane: plane index 367 * @buffer_width: buffer width in pixels 368 * 369 * Returns: 370 * The minimum required pitch in bytes for a buffer by taking into consideration 371 * the pixel format information and the buffer width. 372 */ 373 uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, 374 int plane, unsigned int buffer_width) 375 { 376 if (!info || plane < 0 || plane >= info->num_planes) 377 return 0; 378 379 return DIV_ROUND_UP_ULL((u64)buffer_width * info->char_per_block[plane], 380 drm_format_info_block_width(info, plane) * 381 drm_format_info_block_height(info, plane)); 382 } 383 EXPORT_SYMBOL(drm_format_info_min_pitch); 384