Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> writes: > Add support for the monochrome light-on-dark buffer format (R1) to the > fb helper, so this format can be used for fbdev emulation and for the > text console. This avoids the overhead of using XR24 and the associated > conversions on display hardware that supports only a simple monochrome > format. > > R1 is very similar to C1 (monochrome indexed color), and shares the same > depth and bpp. As drm_mode_legacy_fb_format() returns a format based on > only depth and bpp, it cannot distinguish between R1 and C1. Hence > drm_fb_helper_find_format() is modified to try to fall back to R1 if C1 > is not supported. > > Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> > --- Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx> -- Best regards, Javier Martinez Canillas Core Platforms Red Hat
