[PATCH v13 04/12] drm/mediatek: add shadow register support

We need to acquire mutex before using the resources, and need to release it after finished. So we don't need to write registers in the blanking period. Signed-off-by: YT Shen Acked-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 75

[PATCH v13 04/12] drm/mediatek: add shadow register support

We need to acquire mutex before using the resources, and need to release it after finished. So we don't need to write registers in the blanking period. Signed-off-by: YT Shen Acked-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 75 -