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drm: Move format-related helpers to drm_fourcc.c 

The drm_crtc.c file is a mess, making the ABI documentation confusing
since all functions are in the same bag. Split the format-related
helpers to a new drm_fourcc.c file.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465466048-2020-1-git-send-email-laurent.pinchart@ideasonboard.com
This commit is contained in:
Laurent Pinchart 2016-06-09 12:54:08 +03:00 committed by Daniel Vetter
parent 081e9c0f8b
commit ae4df11a0f
7 changed files with 364 additions and 299 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Documentation/DocBook/gpu.tmpl
View File

@ -1017,6 +1017,11 @@ int max_width, max_height;</synopsis>
<function>drm_framebuffer_unregister_private</function>.
</para>
</sect2>
<sect2>
<title>DRM Format Handling</title>
!Iinclude/drm/drm_fourcc.h
!Edrivers/gpu/drm/drm_fourcc.c
</sect2>
<sect2>
<title>Dumb Buffer Objects</title>
<para>

2
drivers/gpu/drm/Makefile
View File

@ -8,7 +8,7 @@ drm-y := drm_auth.o drm_bufs.o drm_cache.o \
drm_lock.o drm_memory.o drm_drv.o drm_vm.o \
drm_scatter.o drm_pci.o \
drm_platform.o drm_sysfs.o drm_hashtab.o drm_mm.o \
drm_crtc.o drm_modes.o drm_edid.o \
drm_crtc.o drm_fourcc.o drm_modes.o drm_edid.o \
drm_info.o drm_debugfs.o drm_encoder_slave.o \
drm_trace_points.o drm_global.o drm_prime.o \
drm_rect.o drm_vma_manager.o drm_flip_work.o \

289
drivers/gpu/drm/drm_crtc.c
View File

@ -239,37 +239,6 @@ const char *drm_get_subpixel_order_name(enum subpixel_order order)
}
EXPORT_SYMBOL(drm_get_subpixel_order_name);
static char printable_char(int c)
{
return isascii(c) && isprint(c) ? c : '?';
}
/**
* drm_get_format_name - return a string for drm fourcc format
* @format: format to compute name of
*
* Note that the buffer used by this function is globally shared and owned by
* the function itself.
*
* FIXME: This isn't really multithreading safe.
*/
const char *drm_get_format_name(uint32_t format)
{
static char buf[32];
snprintf(buf, sizeof(buf),
"%c%c%c%c %s-endian (0x%08x)",
printable_char(format & 0xff),
printable_char((format >> 8) & 0xff),
printable_char((format >> 16) & 0xff),
printable_char((format >> 24) & 0x7f),
format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
format);
return buf;
}
EXPORT_SYMBOL(drm_get_format_name);
/*
* Internal function to assign a slot in the object idr and optionally
* register the object into the idr.
@ -5502,264 +5471,6 @@ int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
return dev->driver->dumb_destroy(file_priv, dev, args->handle);
}
/**
* drm_fb_get_bpp_depth - get the bpp/depth values for format
* @format: pixel format (DRM_FORMAT_*)
* @depth: storage for the depth value
* @bpp: storage for the bpp value
*
* This only supports RGB formats here for compat with code that doesn't use
* pixel formats directly yet.
*/
void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
int *bpp)
{
switch (format) {
case DRM_FORMAT_C8:
case DRM_FORMAT_RGB332:
case DRM_FORMAT_BGR233:
*depth = 8;
*bpp = 8;
break;
case DRM_FORMAT_XRGB1555:
case DRM_FORMAT_XBGR1555:
case DRM_FORMAT_RGBX5551:
case DRM_FORMAT_BGRX5551:
case DRM_FORMAT_ARGB1555:
case DRM_FORMAT_ABGR1555:
case DRM_FORMAT_RGBA5551:
case DRM_FORMAT_BGRA5551:
*depth = 15;
*bpp = 16;
break;
case DRM_FORMAT_RGB565:
case DRM_FORMAT_BGR565:
*depth = 16;
*bpp = 16;
break;
case DRM_FORMAT_RGB888:
case DRM_FORMAT_BGR888:
*depth = 24;
*bpp = 24;
break;
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_RGBX8888:
case DRM_FORMAT_BGRX8888:
*depth = 24;
*bpp = 32;
break;
case DRM_FORMAT_XRGB2101010:
case DRM_FORMAT_XBGR2101010:
case DRM_FORMAT_RGBX1010102:
case DRM_FORMAT_BGRX1010102:
case DRM_FORMAT_ARGB2101010:
case DRM_FORMAT_ABGR2101010:
case DRM_FORMAT_RGBA1010102:
case DRM_FORMAT_BGRA1010102:
*depth = 30;
*bpp = 32;
break;
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_ABGR8888:
case DRM_FORMAT_RGBA8888:
case DRM_FORMAT_BGRA8888:
*depth = 32;
*bpp = 32;
break;
default:
DRM_DEBUG_KMS("unsupported pixel format %s\n",
drm_get_format_name(format));
*depth = 0;
*bpp = 0;
break;
}
}
EXPORT_SYMBOL(drm_fb_get_bpp_depth);
/**
* drm_format_num_planes - get the number of planes for format
* @format: pixel format (DRM_FORMAT_*)
*
* Returns:
* The number of planes used by the specified pixel format.
*/
int drm_format_num_planes(uint32_t format)
{
switch (format) {
case DRM_FORMAT_YUV410:
case DRM_FORMAT_YVU410:
case DRM_FORMAT_YUV411:
case DRM_FORMAT_YVU411:
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
case DRM_FORMAT_YUV422:
case DRM_FORMAT_YVU422:
case DRM_FORMAT_YUV444:
case DRM_FORMAT_YVU444:
return 3;
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
case DRM_FORMAT_NV16:
case DRM_FORMAT_NV61:
case DRM_FORMAT_NV24:
case DRM_FORMAT_NV42:
return 2;
default:
return 1;
}
}
EXPORT_SYMBOL(drm_format_num_planes);
/**
* drm_format_plane_cpp - determine the bytes per pixel value
* @format: pixel format (DRM_FORMAT_*)
* @plane: plane index
*
* Returns:
* The bytes per pixel value for the specified plane.
*/
int drm_format_plane_cpp(uint32_t format, int plane)
{
unsigned int depth;
int bpp;
if (plane >= drm_format_num_planes(format))
return 0;
switch (format) {
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
case DRM_FORMAT_UYVY:
case DRM_FORMAT_VYUY:
return 2;
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
case DRM_FORMAT_NV16:
case DRM_FORMAT_NV61:
case DRM_FORMAT_NV24:
case DRM_FORMAT_NV42:
return plane ? 2 : 1;
case DRM_FORMAT_YUV410:
case DRM_FORMAT_YVU410:
case DRM_FORMAT_YUV411:
case DRM_FORMAT_YVU411:
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
case DRM_FORMAT_YUV422:
case DRM_FORMAT_YVU422:
case DRM_FORMAT_YUV444:
case DRM_FORMAT_YVU444:
return 1;
default:
drm_fb_get_bpp_depth(format, &depth, &bpp);
return bpp >> 3;
}
}
EXPORT_SYMBOL(drm_format_plane_cpp);
/**
* drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
* @format: pixel format (DRM_FORMAT_*)
*
* Returns:
* The horizontal chroma subsampling factor for the
* specified pixel format.
*/
int drm_format_horz_chroma_subsampling(uint32_t format)
{
switch (format) {
case DRM_FORMAT_YUV411:
case DRM_FORMAT_YVU411:
case DRM_FORMAT_YUV410:
case DRM_FORMAT_YVU410:
return 4;
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
case DRM_FORMAT_UYVY:
case DRM_FORMAT_VYUY:
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
case DRM_FORMAT_NV16:
case DRM_FORMAT_NV61:
case DRM_FORMAT_YUV422:
case DRM_FORMAT_YVU422:
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
return 2;
default:
return 1;
}
}
EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
/**
* drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
* @format: pixel format (DRM_FORMAT_*)
*
* Returns:
* The vertical chroma subsampling factor for the
* specified pixel format.
*/
int drm_format_vert_chroma_subsampling(uint32_t format)
{
switch (format) {
case DRM_FORMAT_YUV410:
case DRM_FORMAT_YVU410:
return 4;
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
return 2;
default:
return 1;
}
}
EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
/**
* drm_format_plane_width - width of the plane given the first plane
* @width: width of the first plane
* @format: pixel format
* @plane: plane index
*
* Returns:
* The width of @plane, given that the width of the first plane is @width.
*/
int drm_format_plane_width(int width, uint32_t format, int plane)
{
if (plane >= drm_format_num_planes(format))
return 0;
if (plane == 0)
return width;
return width / drm_format_horz_chroma_subsampling(format);
}
EXPORT_SYMBOL(drm_format_plane_width);
/**
* drm_format_plane_height - height of the plane given the first plane
* @height: height of the first plane
* @format: pixel format
* @plane: plane index
*
* Returns:
* The height of @plane, given that the height of the first plane is @height.
*/
int drm_format_plane_height(int height, uint32_t format, int plane)
{
if (plane >= drm_format_num_planes(format))
return 0;
if (plane == 0)
return height;
return height / drm_format_vert_chroma_subsampling(format);
}
EXPORT_SYMBOL(drm_format_plane_height);
/**
* drm_rotation_simplify() - Try to simplify the rotation
* @rotation: Rotation to be simplified

320
drivers/gpu/drm/drm_fourcc.c Normal file
View File

@ -0,0 +1,320 @@
/*
* Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* DRM core format related functions
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <linux/bug.h>
#include <linux/ctype.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <drm/drmP.h>
#include <drm/drm_fourcc.h>
static char printable_char(int c)
{
return isascii(c) && isprint(c) ? c : '?';
}
/**
* drm_get_format_name - return a string for drm fourcc format
* @format: format to compute name of
*
* Note that the buffer used by this function is globally shared and owned by
* the function itself.
*
* FIXME: This isn't really multithreading safe.
*/
const char *drm_get_format_name(uint32_t format)
{
static char buf[32];
snprintf(buf, sizeof(buf),
"%c%c%c%c %s-endian (0x%08x)",
printable_char(format & 0xff),
printable_char((format >> 8) & 0xff),
printable_char((format >> 16) & 0xff),
printable_char((format >> 24) & 0x7f),
format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
format);
return buf;
}
EXPORT_SYMBOL(drm_get_format_name);
/**
* drm_fb_get_bpp_depth - get the bpp/depth values for format
* @format: pixel format (DRM_FORMAT_*)
* @depth: storage for the depth value
* @bpp: storage for the bpp value
*
* This only supports RGB formats here for compat with code that doesn't use
* pixel formats directly yet.
*/
void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
int *bpp)
{
switch (format) {
case DRM_FORMAT_C8:
case DRM_FORMAT_RGB332:
case DRM_FORMAT_BGR233:
*depth = 8;
*bpp = 8;
break;
case DRM_FORMAT_XRGB1555:
case DRM_FORMAT_XBGR1555:
case DRM_FORMAT_RGBX5551:
case DRM_FORMAT_BGRX5551:
case DRM_FORMAT_ARGB1555:
case DRM_FORMAT_ABGR1555:
case DRM_FORMAT_RGBA5551:
case DRM_FORMAT_BGRA5551:
*depth = 15;
*bpp = 16;
break;
case DRM_FORMAT_RGB565:
case DRM_FORMAT_BGR565:
*depth = 16;
*bpp = 16;
break;
case DRM_FORMAT_RGB888:
case DRM_FORMAT_BGR888:
*depth = 24;
*bpp = 24;
break;
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_RGBX8888:
case DRM_FORMAT_BGRX8888:
*depth = 24;
*bpp = 32;
break;
case DRM_FORMAT_XRGB2101010:
case DRM_FORMAT_XBGR2101010:
case DRM_FORMAT_RGBX1010102:
case DRM_FORMAT_BGRX1010102:
case DRM_FORMAT_ARGB2101010:
case DRM_FORMAT_ABGR2101010:
case DRM_FORMAT_RGBA1010102:
case DRM_FORMAT_BGRA1010102:
*depth = 30;
*bpp = 32;
break;
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_ABGR8888:
case DRM_FORMAT_RGBA8888:
case DRM_FORMAT_BGRA8888:
*depth = 32;
*bpp = 32;
break;
default:
DRM_DEBUG_KMS("unsupported pixel format %s\n",
drm_get_format_name(format));
*depth = 0;
*bpp = 0;
break;
}
}
EXPORT_SYMBOL(drm_fb_get_bpp_depth);
/**
* drm_format_num_planes - get the number of planes for format
* @format: pixel format (DRM_FORMAT_*)
*
* Returns:
* The number of planes used by the specified pixel format.
*/
int drm_format_num_planes(uint32_t format)
{
switch (format) {
case DRM_FORMAT_YUV410:
case DRM_FORMAT_YVU410:
case DRM_FORMAT_YUV411:
case DRM_FORMAT_YVU411:
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
case DRM_FORMAT_YUV422:
case DRM_FORMAT_YVU422:
case DRM_FORMAT_YUV444:
case DRM_FORMAT_YVU444:
return 3;
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
case DRM_FORMAT_NV16:
case DRM_FORMAT_NV61:
case DRM_FORMAT_NV24:
case DRM_FORMAT_NV42:
return 2;
default:
return 1;
}
}
EXPORT_SYMBOL(drm_format_num_planes);
/**
* drm_format_plane_cpp - determine the bytes per pixel value
* @format: pixel format (DRM_FORMAT_*)
* @plane: plane index
*
* Returns:
* The bytes per pixel value for the specified plane.
*/
int drm_format_plane_cpp(uint32_t format, int plane)
{
unsigned int depth;
int bpp;
if (plane >= drm_format_num_planes(format))
return 0;
switch (format) {
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
case DRM_FORMAT_UYVY:
case DRM_FORMAT_VYUY:
return 2;
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
case DRM_FORMAT_NV16:
case DRM_FORMAT_NV61:
case DRM_FORMAT_NV24:
case DRM_FORMAT_NV42:
return plane ? 2 : 1;
case DRM_FORMAT_YUV410:
case DRM_FORMAT_YVU410:
case DRM_FORMAT_YUV411:
case DRM_FORMAT_YVU411:
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
case DRM_FORMAT_YUV422:
case DRM_FORMAT_YVU422:
case DRM_FORMAT_YUV444:
case DRM_FORMAT_YVU444:
return 1;
default:
drm_fb_get_bpp_depth(format, &depth, &bpp);
return bpp >> 3;
}
}
EXPORT_SYMBOL(drm_format_plane_cpp);
/**
* drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
* @format: pixel format (DRM_FORMAT_*)
*
* Returns:
* The horizontal chroma subsampling factor for the
* specified pixel format.
*/
int drm_format_horz_chroma_subsampling(uint32_t format)
{
switch (format) {
case DRM_FORMAT_YUV411:
case DRM_FORMAT_YVU411:
case DRM_FORMAT_YUV410:
case DRM_FORMAT_YVU410:
return 4;
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
case DRM_FORMAT_UYVY:
case DRM_FORMAT_VYUY:
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
case DRM_FORMAT_NV16:
case DRM_FORMAT_NV61:
case DRM_FORMAT_YUV422:
case DRM_FORMAT_YVU422:
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
return 2;
default:
return 1;
}
}
EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
/**
* drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
* @format: pixel format (DRM_FORMAT_*)
*
* Returns:
* The vertical chroma subsampling factor for the
* specified pixel format.
*/
int drm_format_vert_chroma_subsampling(uint32_t format)
{
switch (format) {
case DRM_FORMAT_YUV410:
case DRM_FORMAT_YVU410:
return 4;
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
return 2;
default:
return 1;
}
}
EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
/**
* drm_format_plane_width - width of the plane given the first plane
* @width: width of the first plane
* @format: pixel format
* @plane: plane index
*
* Returns:
* The width of @plane, given that the width of the first plane is @width.
*/
int drm_format_plane_width(int width, uint32_t format, int plane)
{
if (plane >= drm_format_num_planes(format))
return 0;
if (plane == 0)
return width;
return width / drm_format_horz_chroma_subsampling(format);
}
EXPORT_SYMBOL(drm_format_plane_width);
/**
* drm_format_plane_height - height of the plane given the first plane
* @height: height of the first plane
* @format: pixel format
* @plane: plane index
*
* Returns:
* The height of @plane, given that the height of the first plane is @height.
*/
int drm_format_plane_height(int height, uint32_t format, int plane)
{
if (plane >= drm_format_num_planes(format))
return 0;
if (plane == 0)
return height;
return height / drm_format_vert_chroma_subsampling(format);
}
EXPORT_SYMBOL(drm_format_plane_height);

1
include/drm/drmP.h
View File

@ -68,6 +68,7 @@
#include <drm/drm_agpsupport.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_global.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_mem_util.h>

9
include/drm/drm_crtc.h
View File

@ -2645,15 +2645,6 @@ extern int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
extern int drm_mode_atomic_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv);
extern void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
int *bpp);
extern int drm_format_num_planes(uint32_t format);
extern int drm_format_plane_cpp(uint32_t format, int plane);
extern int drm_format_horz_chroma_subsampling(uint32_t format);
extern int drm_format_vert_chroma_subsampling(uint32_t format);
extern int drm_format_plane_width(int width, uint32_t format, int plane);
extern int drm_format_plane_height(int height, uint32_t format, int plane);
extern const char *drm_get_format_name(uint32_t format);
extern struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
unsigned int supported_rotations);
extern unsigned int drm_rotation_simplify(unsigned int rotation,

37
include/drm/drm_fourcc.h Normal file
View File

@ -0,0 +1,37 @@
/*
* Copyright (c) 2016 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef __DRM_FOURCC_H__
#define __DRM_FOURCC_H__
#include <linux/types.h>
#include <uapi/drm/drm_fourcc.h>
void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, int *bpp);
int drm_format_num_planes(uint32_t format);
int drm_format_plane_cpp(uint32_t format, int plane);
int drm_format_horz_chroma_subsampling(uint32_t format);
int drm_format_vert_chroma_subsampling(uint32_t format);
int drm_format_plane_width(int width, uint32_t format, int plane);
int drm_format_plane_height(int height, uint32_t format, int plane);
const char *drm_get_format_name(uint32_t format);
#endif /* __DRM_FOURCC_H__ */