Return correct fourcc codes on bigendian. Drivers must be adapted to this change.
Signed-off-by: Gerd Hoffmann kraxel@redhat.com --- drivers/gpu/drm/drm_fourcc.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index adb3ff59a4..28401d3745 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -42,11 +42,34 @@ static char printable_char(int c) * * Computes a drm fourcc pixel format code for the given @bpp/@depth values. * Useful in fbdev emulation code, since that deals in those values. + * + * DRM_FORMAT_* are little endian, we'll pick cpu endian here, therefore we + * results differ depending on byte order. */ uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) { uint32_t fmt;
+#ifdef __BIG_ENDIAN + switch (bpp) { + case 8: + fmt = DRM_FORMAT_C8; + break; + case 24: + fmt = DRM_FORMAT_BGR888; + break; + case 32: + if (depth == 24) + fmt = DRM_FORMAT_BGRX8888; + else + fmt = DRM_FORMAT_BGRA8888; + break; + default: + DRM_ERROR("bad bpp, assuming b8g8r8x8 pixel format\n"); + fmt = DRM_FORMAT_BGRX8888; + break; + } +#else switch (bpp) { case 8: fmt = DRM_FORMAT_C8; @@ -73,6 +96,7 @@ uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth) fmt = DRM_FORMAT_XRGB8888; break; } +#endif
return fmt; }