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24c478ead0
So far, the drm_format_plane_cpp function was operating on the format's fourcc and was doing a lookup to retrieve the drm_format_info structure and return the cpp. However, this is inefficient since in most cases, we will have the drm_format_info pointer already available so we shouldn't have to perform a new lookup. Some drm_fourcc functions also already operate on the drm_format_info pointer for that reason, so the API is quite inconsistent there. Let's follow the latter pattern and remove the extra lookup while being a bit more consistent. In order to be extra consistent, also rename that function to drm_format_info_plane_cpp and to a static function in the header to match the current policy. Reviewed-by: Emil Velikov <emil.velikov@collabora.com> Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/32aa13e53dbc98a90207fd290aa8e79f785fb11e.1558002671.git-series.maxime.ripard@bootlin.com
298 lines
9.3 KiB
C
298 lines
9.3 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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*/
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struct drm_format_info {
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/** @format: 4CC format identifier (DRM_FORMAT_*) */
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u32 format;
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/**
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* @depth:
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*
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* 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
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* not use in new code and set to 0 for new formats.
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*/
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u8 depth;
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/** @num_planes: Number of color planes (1 to 3) */
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u8 num_planes;
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union {
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/**
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* @cpp:
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*
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* Number of bytes per pixel (per plane), this is aliased with
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* @char_per_block. It is deprecated in favour of using the
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* triplet @char_per_block, @block_w, @block_h for better
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* describing the pixel format.
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*/
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u8 cpp[3];
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/**
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* @char_per_block:
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*
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* Number of bytes per block (per plane), where blocks are
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* defined as a rectangle of pixels which are stored next to
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* each other in a byte aligned memory region. Together with
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* @block_w and @block_h this is used to properly describe tiles
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* in tiled formats or to describe groups of pixels in packed
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* formats for which the memory needed for a single pixel is not
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* byte aligned.
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*
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* @cpp has been kept for historical reasons because there are
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* a lot of places in drivers where it's used. In drm core for
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* generic code paths the preferred way is to use
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* @char_per_block, drm_format_info_block_width() and
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* drm_format_info_block_height() which allows handling both
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* block and non-block formats in the same way.
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*
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* For formats that are intended to be used only with non-linear
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* modifiers both @cpp and @char_per_block must be 0 in the
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* generic format table. Drivers could supply accurate
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* information from their drm_mode_config.get_format_info hook
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* if they want the core to be validating the pitch.
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*/
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u8 char_per_block[3];
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};
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/**
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* @block_w:
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*
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* Block width in pixels, this is intended to be accessed through
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* drm_format_info_block_width()
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*/
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u8 block_w[3];
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/**
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* @block_h:
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*
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* Block height in pixels, this is intended to be accessed through
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* drm_format_info_block_height()
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*/
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u8 block_h[3];
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/** @hsub: Horizontal chroma subsampling factor */
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u8 hsub;
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/** @vsub: Vertical chroma subsampling factor */
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u8 vsub;
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/** @has_alpha: Does the format embeds an alpha component? */
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bool has_alpha;
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/** @is_yuv: Is it a YUV format? */
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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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/**
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* drm_format_info_is_yuv_packed - check that the format info matches a YUV
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* format with data laid in a single plane
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a packed YUV format.
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*/
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static inline bool
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drm_format_info_is_yuv_packed(const struct drm_format_info *info)
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{
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return info->is_yuv && info->num_planes == 1;
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}
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/**
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* drm_format_info_is_yuv_semiplanar - check that the format info matches a YUV
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* format with data laid in two planes (luminance and chrominance)
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a semiplanar YUV format.
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*/
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static inline bool
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drm_format_info_is_yuv_semiplanar(const struct drm_format_info *info)
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{
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return info->is_yuv && info->num_planes == 2;
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}
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/**
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* drm_format_info_is_yuv_planar - check that the format info matches a YUV
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* format with data laid in three planes (one for each YUV component)
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a planar YUV format.
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*/
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static inline bool
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drm_format_info_is_yuv_planar(const struct drm_format_info *info)
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{
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return info->is_yuv && info->num_planes == 3;
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}
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/**
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* drm_format_info_is_yuv_sampling_410 - check that the format info matches a
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* YUV format with 4:1:0 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:1:0
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_410(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 4 && info->vsub == 4;
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}
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/**
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* drm_format_info_is_yuv_sampling_411 - check that the format info matches a
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* YUV format with 4:1:1 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:1:1
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_411(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 4 && info->vsub == 1;
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}
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/**
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* drm_format_info_is_yuv_sampling_420 - check that the format info matches a
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* YUV format with 4:2:0 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:2:0
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_420(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 2 && info->vsub == 2;
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}
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/**
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* drm_format_info_is_yuv_sampling_422 - check that the format info matches a
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* YUV format with 4:2:2 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:2:2
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_422(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 2 && info->vsub == 1;
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}
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/**
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* drm_format_info_is_yuv_sampling_444 - check that the format info matches a
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* YUV format with 4:4:4 sub-sampling
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* @info: format info
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*
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* Returns:
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* A boolean indicating whether the format info matches a YUV format with 4:4:4
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* sub-sampling.
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*/
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static inline bool
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drm_format_info_is_yuv_sampling_444(const struct drm_format_info *info)
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{
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return info->is_yuv && info->hsub == 1 && info->vsub == 1;
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}
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/**
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* drm_format_info_plane_cpp - determine the bytes per pixel value
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* @format: pixel format info
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* @plane: plane index
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*
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* Returns:
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* The bytes per pixel value for the specified plane.
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*/
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static inline
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int drm_format_info_plane_cpp(const struct drm_format_info *info, int plane)
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{
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if (!info || plane >= info->num_planes)
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return 0;
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return info->cpp[plane];
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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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uint32_t drm_driver_legacy_fb_format(struct drm_device *dev,
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uint32_t bpp, uint32_t depth);
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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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unsigned int drm_format_info_block_width(const struct drm_format_info *info,
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int plane);
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unsigned int drm_format_info_block_height(const struct drm_format_info *info,
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int plane);
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uint64_t drm_format_info_min_pitch(const struct drm_format_info *info,
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int plane, unsigned int buffer_width);
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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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