100 lines
3.9 KiB
C
100 lines
3.9 KiB
C
/*
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* Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#ifndef __DRM_FOURCC_H__
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#define __DRM_FOURCC_H__
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#include <linux/types.h>
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#include <uapi/drm/drm_fourcc.h>
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/*
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* DRM formats are little endian. Define host endian variants for the
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* most common formats here, to reduce the #ifdefs needed in drivers.
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*
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* Note that the DRM_FORMAT_BIG_ENDIAN flag should only be used in
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* case the format can't be specified otherwise, so we don't end up
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* with two values describing the same format.
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*/
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#ifdef __BIG_ENDIAN
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# define DRM_FORMAT_HOST_XRGB1555 (DRM_FORMAT_XRGB1555 | \
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DRM_FORMAT_BIG_ENDIAN)
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# define DRM_FORMAT_HOST_RGB565 (DRM_FORMAT_RGB565 | \
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DRM_FORMAT_BIG_ENDIAN)
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# define DRM_FORMAT_HOST_XRGB8888 DRM_FORMAT_BGRX8888
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# define DRM_FORMAT_HOST_ARGB8888 DRM_FORMAT_BGRA8888
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#else
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# define DRM_FORMAT_HOST_XRGB1555 DRM_FORMAT_XRGB1555
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# define DRM_FORMAT_HOST_RGB565 DRM_FORMAT_RGB565
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# define DRM_FORMAT_HOST_XRGB8888 DRM_FORMAT_XRGB8888
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# define DRM_FORMAT_HOST_ARGB8888 DRM_FORMAT_ARGB8888
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#endif
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struct drm_device;
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struct drm_mode_fb_cmd2;
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/**
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* struct drm_format_info - information about a DRM format
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* @format: 4CC format identifier (DRM_FORMAT_*)
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* @depth: Color depth (number of bits per pixel excluding padding bits),
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* valid for a subset of RGB formats only. This is a legacy field, do not
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* use in new code and set to 0 for new formats.
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* @num_planes: Number of color planes (1 to 3)
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* @cpp: Number of bytes per pixel (per plane)
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* @hsub: Horizontal chroma subsampling factor
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* @vsub: Vertical chroma subsampling factor
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* @has_alpha: Does the format embeds an alpha component?
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* @is_yuv: Is it a YUV format?
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*/
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struct drm_format_info {
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u32 format;
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u8 depth;
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u8 num_planes;
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u8 cpp[3];
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u8 hsub;
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u8 vsub;
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bool has_alpha;
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bool is_yuv;
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};
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/**
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* struct drm_format_name_buf - name of a DRM format
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* @str: string buffer containing the format name
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*/
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struct drm_format_name_buf {
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char str[32];
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};
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const struct drm_format_info *__drm_format_info(u32 format);
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const struct drm_format_info *drm_format_info(u32 format);
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const struct drm_format_info *
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drm_get_format_info(struct drm_device *dev,
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const struct drm_mode_fb_cmd2 *mode_cmd);
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uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth);
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int drm_format_num_planes(uint32_t format);
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int drm_format_plane_cpp(uint32_t format, int plane);
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int drm_format_horz_chroma_subsampling(uint32_t format);
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int drm_format_vert_chroma_subsampling(uint32_t format);
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int drm_format_plane_width(int width, uint32_t format, int plane);
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int drm_format_plane_height(int height, uint32_t format, int plane);
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const char *drm_get_format_name(uint32_t format, struct drm_format_name_buf *buf);
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#endif /* __DRM_FOURCC_H__ */
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