include/drm/drm_fourcc.h

   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 struct drm_device;
  29 struct drm_mode_fb_cmd2;
  30
  31 /**
  32  * struct drm_format_info - information about a DRM format
  33  * @format: 4CC format identifier (DRM_FORMAT_*)
  34  * @depth: Color depth (number of bits per pixel excluding padding bits),
  35  *      valid for a subset of RGB formats only. This is a legacy field, do not
  36  *      use in new code and set to 0 for new formats.
  37  * @num_planes: Number of color planes (1 to 3)
  38  * @cpp: Number of bytes per pixel (per plane)
  39  * @hsub: Horizontal chroma subsampling factor
  40  * @vsub: Vertical chroma subsampling factor
  41  */
  42 struct drm_format_info {
  43         u32 format;
  44         u8 depth;
  45         u8 num_planes;
  46         u8 cpp[3];
  47         u8 hsub;
  48         u8 vsub;
  49 };
  50
  51 /**
  52  * struct drm_format_name_buf - name of a DRM format
  53  * @str: string buffer containing the format name
  54  */
  55 struct drm_format_name_buf {
  56         char str[32];
  57 };
  58
  59 const struct drm_format_info *__drm_format_info(u32 format);
  60 const struct drm_format_info *drm_format_info(u32 format);
  61 const struct drm_format_info *
  62 drm_get_format_info(struct drm_device *dev,
  63                     const struct drm_mode_fb_cmd2 *mode_cmd);
  64 uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth);
  65 int drm_format_num_planes(uint32_t format);
  66 int drm_format_plane_cpp(uint32_t format, int plane);
  67 int drm_format_horz_chroma_subsampling(uint32_t format);
  68 int drm_format_vert_chroma_subsampling(uint32_t format);
  69 int drm_format_plane_width(int width, uint32_t format, int plane);
  70 int drm_format_plane_height(int height, uint32_t format, int plane);
  71 const char *drm_get_format_name(uint32_t format, struct drm_format_name_buf *buf);
  72
  73 #endif /* __DRM_FOURCC_H__ */