diff options
author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-10-12 08:22:25 +0200 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-10-12 08:22:25 +0200 |
commit | c0c8b9ed1b0c14d91ff73624df6d918bb47c8a5e (patch) | |
tree | 7fb6f2c7c028cd4926b827d3b5937c49afefa63a /drivers/gpu/drm/drm_fourcc.c | |
parent | 5a920b85f2c6e3fd7d9dd9bb3f3345e9085e2360 (diff) | |
parent | 69405d3da98b48633b78a49403e4f9cdb7c6a0f5 (diff) | |
download | op-kernel-dev-c0c8b9ed1b0c14d91ff73624df6d918bb47c8a5e.zip op-kernel-dev-c0c8b9ed1b0c14d91ff73624df6d918bb47c8a5e.tar.gz |
Merge tag 'drm-for-v4.9' into drm-intel-next-queued
It's been over two months, git definitely lost it's marbles. Conflicts
resolved by picking our version, plus manually checking the diff with
the parent in drm-intel-next-queued to make sure git didn't do
anything stupid. It did, so I removed 2 occasions where it
double-inserted a bit of code. The diff is now just
- kernel-doc changes
- drm format/name changes
- display-info changes
so looks all reasonable.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'drivers/gpu/drm/drm_fourcc.c')
-rw-r--r-- | drivers/gpu/drm/drm_fourcc.c | 62 |
1 files changed, 53 insertions, 9 deletions
diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index 0645c85..29c56b4 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -36,19 +36,60 @@ static char printable_char(int c) } /** + * drm_mode_legacy_fb_format - compute drm fourcc code from legacy description + * @bpp: bits per pixels + * @depth: bit depth per pixel + * + * Computes a drm fourcc pixel format code for the given @bpp/@depth values. + * Useful in fbdev emulation code, since that deals in those values. + */ +uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) +{ + uint32_t fmt; + + switch (bpp) { + case 8: + fmt = DRM_FORMAT_C8; + break; + case 16: + if (depth == 15) + fmt = DRM_FORMAT_XRGB1555; + else + fmt = DRM_FORMAT_RGB565; + break; + case 24: + fmt = DRM_FORMAT_RGB888; + break; + case 32: + if (depth == 24) + fmt = DRM_FORMAT_XRGB8888; + else if (depth == 30) + fmt = DRM_FORMAT_XRGB2101010; + else + fmt = DRM_FORMAT_ARGB8888; + break; + default: + DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n"); + fmt = DRM_FORMAT_XRGB8888; + break; + } + + return fmt; +} +EXPORT_SYMBOL(drm_mode_legacy_fb_format); + +/** * 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. + * Note that the buffer returned by this function is owned by the caller + * and will need to be freed using kfree(). */ -const char *drm_get_format_name(uint32_t format) +char *drm_get_format_name(uint32_t format) { - static char buf[32]; + char *buf = kmalloc(32, GFP_KERNEL); - snprintf(buf, sizeof(buf), + snprintf(buf, 32, "%c%c%c%c %s-endian (0x%08x)", printable_char(format & 0xff), printable_char((format >> 8) & 0xff), @@ -73,6 +114,8 @@ EXPORT_SYMBOL(drm_get_format_name); void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, int *bpp) { + char *format_name; + switch (format) { case DRM_FORMAT_C8: case DRM_FORMAT_RGB332: @@ -127,8 +170,9 @@ void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth, *bpp = 32; break; default: - DRM_DEBUG_KMS("unsupported pixel format %s\n", - drm_get_format_name(format)); + format_name = drm_get_format_name(format); + DRM_DEBUG_KMS("unsupported pixel format %s\n", format_name); + kfree(format_name); *depth = 0; *bpp = 0; break; |