2 * Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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.
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
22 #ifndef __DRM_FOURCC_H__
23 #define __DRM_FOURCC_H__
25 #include <linux/types.h>
26 #include <uapi/drm/drm_fourcc.h>
29 * DRM_FORMAT_MAX_PLANES - maximum number of planes a DRM format can have
31 #define DRM_FORMAT_MAX_PLANES 4u
34 * DRM formats are little endian. Define host endian variants for the
35 * most common formats here, to reduce the #ifdefs needed in drivers.
37 * Note that the DRM_FORMAT_BIG_ENDIAN flag should only be used in
38 * case the format can't be specified otherwise, so we don't end up
39 * with two values describing the same format.
42 # define DRM_FORMAT_HOST_XRGB1555 (DRM_FORMAT_XRGB1555 | \
43 DRM_FORMAT_BIG_ENDIAN)
44 # define DRM_FORMAT_HOST_RGB565 (DRM_FORMAT_RGB565 | \
45 DRM_FORMAT_BIG_ENDIAN)
46 # define DRM_FORMAT_HOST_XRGB8888 DRM_FORMAT_BGRX8888
47 # define DRM_FORMAT_HOST_ARGB8888 DRM_FORMAT_BGRA8888
49 # define DRM_FORMAT_HOST_XRGB1555 DRM_FORMAT_XRGB1555
50 # define DRM_FORMAT_HOST_RGB565 DRM_FORMAT_RGB565
51 # define DRM_FORMAT_HOST_XRGB8888 DRM_FORMAT_XRGB8888
52 # define DRM_FORMAT_HOST_ARGB8888 DRM_FORMAT_ARGB8888
56 struct drm_mode_fb_cmd2;
59 * struct drm_format_info - information about a DRM format
61 struct drm_format_info {
62 /** @format: 4CC format identifier (DRM_FORMAT_*) */
68 * Color depth (number of bits per pixel excluding padding bits),
69 * valid for a subset of RGB formats only. This is a legacy field, do
70 * not use in new code and set to 0 for new formats.
74 /** @num_planes: Number of color planes (1 to 3) */
81 * Number of bytes per pixel (per plane), this is aliased with
82 * @char_per_block. It is deprecated in favour of using the
83 * triplet @char_per_block, @block_w, @block_h for better
84 * describing the pixel format.
86 u8 cpp[DRM_FORMAT_MAX_PLANES];
91 * Number of bytes per block (per plane), where blocks are
92 * defined as a rectangle of pixels which are stored next to
93 * each other in a byte aligned memory region. Together with
94 * @block_w and @block_h this is used to properly describe tiles
95 * in tiled formats or to describe groups of pixels in packed
96 * formats for which the memory needed for a single pixel is not
99 * @cpp has been kept for historical reasons because there are
100 * a lot of places in drivers where it's used. In drm core for
101 * generic code paths the preferred way is to use
102 * @char_per_block, drm_format_info_block_width() and
103 * drm_format_info_block_height() which allows handling both
104 * block and non-block formats in the same way.
106 * For formats that are intended to be used only with non-linear
107 * modifiers both @cpp and @char_per_block must be 0 in the
108 * generic format table. Drivers could supply accurate
109 * information from their drm_mode_config.get_format_info hook
110 * if they want the core to be validating the pitch.
112 u8 char_per_block[DRM_FORMAT_MAX_PLANES];
118 * Block width in pixels, this is intended to be accessed through
119 * drm_format_info_block_width()
121 u8 block_w[DRM_FORMAT_MAX_PLANES];
126 * Block height in pixels, this is intended to be accessed through
127 * drm_format_info_block_height()
129 u8 block_h[DRM_FORMAT_MAX_PLANES];
131 /** @hsub: Horizontal chroma subsampling factor */
133 /** @vsub: Vertical chroma subsampling factor */
136 /** @has_alpha: Does the format embeds an alpha component? */
139 /** @is_yuv: Is it a YUV format? */
142 /** @is_color_indexed: Is it a color-indexed format? */
143 bool is_color_indexed;
147 * drm_format_info_is_yuv_packed - check that the format info matches a YUV
148 * format with data laid in a single plane
152 * A boolean indicating whether the format info matches a packed YUV format.
155 drm_format_info_is_yuv_packed(const struct drm_format_info *info)
157 return info->is_yuv && info->num_planes == 1;
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)
166 * A boolean indicating whether the format info matches a semiplanar YUV format.
169 drm_format_info_is_yuv_semiplanar(const struct drm_format_info *info)
171 return info->is_yuv && info->num_planes == 2;
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)
180 * A boolean indicating whether the format info matches a planar YUV format.
183 drm_format_info_is_yuv_planar(const struct drm_format_info *info)
185 return info->is_yuv && info->num_planes == 3;
189 * drm_format_info_is_yuv_sampling_410 - check that the format info matches a
190 * YUV format with 4:1:0 sub-sampling
194 * A boolean indicating whether the format info matches a YUV format with 4:1:0
198 drm_format_info_is_yuv_sampling_410(const struct drm_format_info *info)
200 return info->is_yuv && info->hsub == 4 && info->vsub == 4;
204 * drm_format_info_is_yuv_sampling_411 - check that the format info matches a
205 * YUV format with 4:1:1 sub-sampling
209 * A boolean indicating whether the format info matches a YUV format with 4:1:1
213 drm_format_info_is_yuv_sampling_411(const struct drm_format_info *info)
215 return info->is_yuv && info->hsub == 4 && info->vsub == 1;
219 * drm_format_info_is_yuv_sampling_420 - check that the format info matches a
220 * YUV format with 4:2:0 sub-sampling
224 * A boolean indicating whether the format info matches a YUV format with 4:2:0
228 drm_format_info_is_yuv_sampling_420(const struct drm_format_info *info)
230 return info->is_yuv && info->hsub == 2 && info->vsub == 2;
234 * drm_format_info_is_yuv_sampling_422 - check that the format info matches a
235 * YUV format with 4:2:2 sub-sampling
239 * A boolean indicating whether the format info matches a YUV format with 4:2:2
243 drm_format_info_is_yuv_sampling_422(const struct drm_format_info *info)
245 return info->is_yuv && info->hsub == 2 && info->vsub == 1;
249 * drm_format_info_is_yuv_sampling_444 - check that the format info matches a
250 * YUV format with 4:4:4 sub-sampling
254 * A boolean indicating whether the format info matches a YUV format with 4:4:4
258 drm_format_info_is_yuv_sampling_444(const struct drm_format_info *info)
260 return info->is_yuv && info->hsub == 1 && info->vsub == 1;
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
270 * The width of @plane, given that the width of the first plane is @width.
273 int drm_format_info_plane_width(const struct drm_format_info *info, int width,
276 if (!info || plane >= info->num_planes)
282 return width / info->hsub;
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
292 * The height of @plane, given that the height of the first plane is @height.
295 int drm_format_info_plane_height(const struct drm_format_info *info, int height,
298 if (!info || plane >= info->num_planes)
304 return height / info->vsub;
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,
317 unsigned int drm_format_info_block_height(const struct drm_format_info *info,
319 unsigned int drm_format_info_bpp(const struct drm_format_info *info, int plane);
320 uint64_t drm_format_info_min_pitch(const struct drm_format_info *info,
321 int plane, unsigned int buffer_width);
323 #endif /* __DRM_FOURCC_H__ */