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drm: Print pretty names for pixel formats 

Rather than just printing the pixel format as a hex number, decode the
fourcc into human readable form, and also decode the LE vs. BE flag.

Keep printing the raw hex number too in case it contains non-printable
characters.

Some examples what the new drm_get_format_name() produces:
DRM_FORMAT_XRGB8888: "XR24 little-endian (0x34325258)"
DRM_FORMAT_YUYV: "YUYV little-endian (0x56595559)"
DRM_FORMAT_RGB565|DRM_FORMAT_BIG_ENDIAN: "RG16 big-endian (0xb6314752)"
Unprintable characters: "D??? big-endian (0xff7f0244)"

v2: Fix patch author

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Ville Syrjälä 2013-06-10 11:15:10 +03:00 committed by Dave Airlie
parent ca793f75d9
commit 6ba6d03e69
2 changed files with 28 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/gpu/drm/drm_crtc.c
View File

@ -29,6 +29,7 @@
* Dave Airlie <airlied@linux.ie>
* Jesse Barnes <jesse.barnes@intel.com>
*/
#include <linux/ctype.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/export.h>
@ -252,6 +253,28 @@ char *drm_get_connector_status_name(enum drm_connector_status status)
}
EXPORT_SYMBOL(drm_get_connector_status_name);
static char printable_char(int c)
{
return isascii(c) && isprint(c) ? c : '?';
}
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_mode_object_get - allocate a new modeset identifier
* @dev: DRM device
@ -1834,7 +1857,8 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
if (fb->pixel_format == plane->format_types[i])
break;
if (i == plane->format_count) {
DRM_DEBUG_KMS("Invalid pixel format 0x%08x\n", fb->pixel_format);
DRM_DEBUG_KMS("Invalid pixel format %s\n",
drm_get_format_name(fb->pixel_format));
ret = -EINVAL;
goto out;
}
@ -2312,7 +2336,8 @@ static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
ret = format_check(r);
if (ret) {
DRM_DEBUG_KMS("bad framebuffer format 0x%08x\n", r->pixel_format);
DRM_DEBUG_KMS("bad framebuffer format %s\n",
drm_get_format_name(r->pixel_format));
return ret;
}

1
include/drm/drm_crtc.h
View File

@ -1094,5 +1094,6 @@ 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 char *drm_get_format_name(uint32_t format);
#endif /* __DRM_CRTC_H__ */