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_R8, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 }, 137 { .format = DRM_FORMAT_RGB332, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 }, 138 { .format = DRM_FORMAT_BGR233, .depth = 8, .num_planes = 1, .cpp = { 1, 0, 0 }, .hsub = 1, .vsub = 1 }, 139 { .format = DRM_FORMAT_XRGB4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 140 { .format = DRM_FORMAT_XBGR4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 141 { .format = DRM_FORMAT_RGBX4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 142 { .format = DRM_FORMAT_BGRX4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 143 { .format = DRM_FORMAT_ARGB4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 144 { .format = DRM_FORMAT_ABGR4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 145 { .format = DRM_FORMAT_RGBA4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 146 { .format = DRM_FORMAT_BGRA4444, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 147 { .format = DRM_FORMAT_XRGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 148 { .format = DRM_FORMAT_XBGR1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 149 { .format = DRM_FORMAT_RGBX5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 150 { .format = DRM_FORMAT_BGRX5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 151 { .format = DRM_FORMAT_ARGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 152 { .format = DRM_FORMAT_ABGR1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 153 { .format = DRM_FORMAT_RGBA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 154 { .format = DRM_FORMAT_BGRA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 155 { .format = DRM_FORMAT_RGB565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 156 { .format = DRM_FORMAT_BGR565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, 157 { .format = DRM_FORMAT_RGB888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 }, 158 { .format = DRM_FORMAT_BGR888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 }, 159 { .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 160 { .format = DRM_FORMAT_XBGR8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 161 { .format = DRM_FORMAT_RGBX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 162 { .format = DRM_FORMAT_BGRX8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 163 { .format = DRM_FORMAT_RGB565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 164 { .format = DRM_FORMAT_BGR565_A8, .depth = 24, .num_planes = 2, .cpp = { 2, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 165 { .format = DRM_FORMAT_XRGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 166 { .format = DRM_FORMAT_XBGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 167 { .format = DRM_FORMAT_RGBX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 168 { .format = DRM_FORMAT_BGRX1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, 169 { .format = DRM_FORMAT_ARGB2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 170 { .format = DRM_FORMAT_ABGR2101010, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 171 { .format = DRM_FORMAT_RGBA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 172 { .format = DRM_FORMAT_BGRA1010102, .depth = 30, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 173 { .format = DRM_FORMAT_ARGB8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 174 { .format = DRM_FORMAT_ABGR8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 175 { .format = DRM_FORMAT_RGBA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 176 { .format = DRM_FORMAT_BGRA8888, .depth = 32, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 177 { .format = DRM_FORMAT_XRGB16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 }, 178 { .format = DRM_FORMAT_XBGR16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 }, 179 { .format = DRM_FORMAT_ARGB16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 180 { .format = DRM_FORMAT_ABGR16161616F, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 181 { .format = DRM_FORMAT_AXBXGXRX106106106106, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 182 { .format = DRM_FORMAT_XRGB16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 }, 183 { .format = DRM_FORMAT_XBGR16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1 }, 184 { .format = DRM_FORMAT_ARGB16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 185 { .format = DRM_FORMAT_ABGR16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 186 { .format = DRM_FORMAT_RGB888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 187 { .format = DRM_FORMAT_BGR888_A8, .depth = 32, .num_planes = 2, .cpp = { 3, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 188 { .format = DRM_FORMAT_XRGB8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 189 { .format = DRM_FORMAT_XBGR8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 190 { .format = DRM_FORMAT_RGBX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 191 { .format = DRM_FORMAT_BGRX8888_A8, .depth = 32, .num_planes = 2, .cpp = { 4, 1, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, 192 { .format = DRM_FORMAT_YUV410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4, .is_yuv = true }, 193 { .format = DRM_FORMAT_YVU410, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 4, .is_yuv = true }, 194 { .format = DRM_FORMAT_YUV411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1, .is_yuv = true }, 195 { .format = DRM_FORMAT_YVU411, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 4, .vsub = 1, .is_yuv = true }, 196 { .format = DRM_FORMAT_YUV420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2, .is_yuv = true }, 197 { .format = DRM_FORMAT_YVU420, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 2, .is_yuv = true }, 198 { .format = DRM_FORMAT_YUV422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 199 { .format = DRM_FORMAT_YVU422, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 200 { .format = DRM_FORMAT_YUV444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 201 { .format = DRM_FORMAT_YVU444, .depth = 0, .num_planes = 3, .cpp = { 1, 1, 1 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 202 { .format = DRM_FORMAT_NV12, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true }, 203 { .format = DRM_FORMAT_NV21, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 2, .is_yuv = true }, 204 { .format = DRM_FORMAT_NV16, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 205 { .format = DRM_FORMAT_NV61, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 206 { .format = DRM_FORMAT_NV24, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 207 { .format = DRM_FORMAT_NV42, .depth = 0, .num_planes = 2, .cpp = { 1, 2, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 208 { .format = DRM_FORMAT_YUYV, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 209 { .format = DRM_FORMAT_YVYU, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 210 { .format = DRM_FORMAT_UYVY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 211 { .format = DRM_FORMAT_VYUY, .depth = 0, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 212 { .format = DRM_FORMAT_XYUV8888, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 213 { .format = DRM_FORMAT_VUY888, .depth = 0, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 214 { .format = DRM_FORMAT_AYUV, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, 215 { .format = DRM_FORMAT_Y210, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 216 { .format = DRM_FORMAT_Y212, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 217 { .format = DRM_FORMAT_Y216, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 2, .vsub = 1, .is_yuv = true }, 218 { .format = DRM_FORMAT_Y410, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, 219 { .format = DRM_FORMAT_Y412, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, 220 { .format = DRM_FORMAT_Y416, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true, .is_yuv = true }, 221 { .format = DRM_FORMAT_XVYU2101010, .depth = 0, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 222 { .format = DRM_FORMAT_XVYU12_16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 223 { .format = DRM_FORMAT_XVYU16161616, .depth = 0, .num_planes = 1, .cpp = { 8, 0, 0 }, .hsub = 1, .vsub = 1, .is_yuv = true }, 224 { .format = DRM_FORMAT_Y0L0, .depth = 0, .num_planes = 1, 225 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, 226 .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true }, 227 { .format = DRM_FORMAT_X0L0, .depth = 0, .num_planes = 1, 228 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, 229 .hsub = 2, .vsub = 2, .is_yuv = true }, 230 { .format = DRM_FORMAT_Y0L2, .depth = 0, .num_planes = 1, 231 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, 232 .hsub = 2, .vsub = 2, .has_alpha = true, .is_yuv = true }, 233 { .format = DRM_FORMAT_X0L2, .depth = 0, .num_planes = 1, 234 .char_per_block = { 8, 0, 0 }, .block_w = { 2, 0, 0 }, .block_h = { 2, 0, 0 }, 235 .hsub = 2, .vsub = 2, .is_yuv = true }, 236 { .format = DRM_FORMAT_P010, .depth = 0, .num_planes = 2, 237 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, 238 .hsub = 2, .vsub = 2, .is_yuv = true}, 239 { .format = DRM_FORMAT_P012, .depth = 0, .num_planes = 2, 240 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, 241 .hsub = 2, .vsub = 2, .is_yuv = true}, 242 { .format = DRM_FORMAT_P016, .depth = 0, .num_planes = 2, 243 .char_per_block = { 2, 4, 0 }, .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, 244 .hsub = 2, .vsub = 2, .is_yuv = true}, 245 { .format = DRM_FORMAT_P210, .depth = 0, 246 .num_planes = 2, .char_per_block = { 2, 4, 0 }, 247 .block_w = { 1, 1, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2, 248 .vsub = 1, .is_yuv = true }, 249 { .format = DRM_FORMAT_VUY101010, .depth = 0, 250 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 1, .vsub = 1, 251 .is_yuv = true }, 252 { .format = DRM_FORMAT_YUV420_8BIT, .depth = 0, 253 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 2, .vsub = 2, 254 .is_yuv = true }, 255 { .format = DRM_FORMAT_YUV420_10BIT, .depth = 0, 256 .num_planes = 1, .cpp = { 0, 0, 0 }, .hsub = 2, .vsub = 2, 257 .is_yuv = true }, 258 { .format = DRM_FORMAT_NV15, .depth = 0, 259 .num_planes = 2, .char_per_block = { 5, 5, 0 }, 260 .block_w = { 4, 2, 0 }, .block_h = { 1, 1, 0 }, .hsub = 2, 261 .vsub = 2, .is_yuv = true }, 262 { .format = DRM_FORMAT_Q410, .depth = 0, 263 .num_planes = 3, .char_per_block = { 2, 2, 2 }, 264 .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0, 265 .vsub = 0, .is_yuv = true }, 266 { .format = DRM_FORMAT_Q401, .depth = 0, 267 .num_planes = 3, .char_per_block = { 2, 2, 2 }, 268 .block_w = { 1, 1, 1 }, .block_h = { 1, 1, 1 }, .hsub = 0, 269 .vsub = 0, .is_yuv = true }, 270 }; 271 272 unsigned int i; 273 274 for (i = 0; i < ARRAY_SIZE(formats); ++i) { 275 if (formats[i].format == format) 276 return &formats[i]; 277 } 278 279 return NULL; 280 } 281 282 /** 283 * drm_format_info - query information for a given format 284 * @format: pixel format (DRM_FORMAT_*) 285 * 286 * The caller should only pass a supported pixel format to this function. 287 * Unsupported pixel formats will generate a warning in the kernel log. 288 * 289 * Returns: 290 * The instance of struct drm_format_info that describes the pixel format, or 291 * NULL if the format is unsupported. 292 */ 293 const struct drm_format_info *drm_format_info(u32 format) 294 { 295 const struct drm_format_info *info; 296 297 info = __drm_format_info(format); 298 WARN_ON(!info); 299 return info; 300 } 301 EXPORT_SYMBOL(drm_format_info); 302 303 /** 304 * drm_get_format_info - query information for a given framebuffer configuration 305 * @dev: DRM device 306 * @mode_cmd: metadata from the userspace fb creation request 307 * 308 * Returns: 309 * The instance of struct drm_format_info that describes the pixel format, or 310 * NULL if the format is unsupported. 311 */ 312 const struct drm_format_info * 313 drm_get_format_info(struct drm_device *dev, 314 const struct drm_mode_fb_cmd2 *mode_cmd) 315 { 316 const struct drm_format_info *info = NULL; 317 318 if (dev->mode_config.funcs->get_format_info) 319 info = dev->mode_config.funcs->get_format_info(mode_cmd); 320 321 if (!info) 322 info = drm_format_info(mode_cmd->pixel_format); 323 324 return info; 325 } 326 EXPORT_SYMBOL(drm_get_format_info); 327 328 /** 329 * drm_format_info_block_width - width in pixels of block. 330 * @info: pixel format info 331 * @plane: plane index 332 * 333 * Returns: 334 * The width in pixels of a block, depending on the plane index. 335 */ 336 unsigned int drm_format_info_block_width(const struct drm_format_info *info, 337 int plane) 338 { 339 if (!info || plane < 0 || plane >= info->num_planes) 340 return 0; 341 342 if (!info->block_w[plane]) 343 return 1; 344 return info->block_w[plane]; 345 } 346 EXPORT_SYMBOL(drm_format_info_block_width); 347 348 /** 349 * drm_format_info_block_height - height in pixels of a block 350 * @info: pixel format info 351 * @plane: plane index 352 * 353 * Returns: 354 * The height in pixels of a block, depending on the plane index. 355 */ 356 unsigned int drm_format_info_block_height(const struct drm_format_info *info, 357 int plane) 358 { 359 if (!info || plane < 0 || plane >= info->num_planes) 360 return 0; 361 362 if (!info->block_h[plane]) 363 return 1; 364 return info->block_h[plane]; 365 } 366 EXPORT_SYMBOL(drm_format_info_block_height); 367 368 /** 369 * drm_format_info_min_pitch - computes the minimum required pitch in bytes 370 * @info: pixel format info 371 * @plane: plane index 372 * @buffer_width: buffer width in pixels 373 * 374 * Returns: 375 * The minimum required pitch in bytes for a buffer by taking into consideration 376 * the pixel format information and the buffer width. 377 */ 378 uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, 379 int plane, unsigned int buffer_width) 380 { 381 if (!info || plane < 0 || plane >= info->num_planes) 382 return 0; 383 384 return DIV_ROUND_UP_ULL((u64)buffer_width * info->char_per_block[plane], 385 drm_format_info_block_width(info, plane) * 386 drm_format_info_block_height(info, plane)); 387 } 388 EXPORT_SYMBOL(drm_format_info_min_pitch); 389