From: Stu Hsieh Date: Thu, 9 Aug 2018 02:15:42 +0000 (+0800) Subject: drm/mediatek: add the comment about color format setting for OVL X-Git-Tag: android-x86-8.1-r1~322^2~2^2~7 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=55b53f6f7ccf0990ad83acf4fdb0436ff79fdfb6;p=android-x86%2Fkernel.git drm/mediatek: add the comment about color format setting for OVL This patch add the comment about color format setting for OVL Signed-off-by: Stu Hsieh Signed-off-by: CK Hu --- diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c index 978782a77629..0facd823c552 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c @@ -157,6 +157,11 @@ static void mtk_ovl_layer_off(struct mtk_ddp_comp *comp, unsigned int idx) static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt) { + /* The return value in switch "MEM_MODE_INPUT_FORMAT_XXX" + * is defined in mediatek HW data sheet. + * The alphabet order in XXX is no relation to data + * arrangement in memory. + */ switch (fmt) { default: case DRM_FORMAT_RGB565: