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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 <stu.hsieh@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
This commit is contained in:
Stu Hsieh 2018-08-09 10:15:42 +08:00 committed by CK Hu
parent b428391ed6
commit 55b53f6f7c
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/mediatek/mtk_disp_ovl.c
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@ -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: