Hi, Jason:
On Mon, 2022-09-12 at 09:30 +0800, Jason-JH.Lin wrote:
> Since the bootlaoder may set the RELAY_MODE to gamma be for the
> kerenl,
> we have to clear the RELAY_MODE bit to make sure that the gamma is
> enabled correctly.
>
> Fixes: b10023b03082 ("FROMGIT: drm/mediatek: Separate gamma module")
Fixes: 69a4237ab1d1 ("drm/mediatek: Separate gamma module")
and move this patch to the first patch of this series so this patch
could be picked to early stable branch.
Regards,
CK
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index d706f76fd30e..15fe2a4f98de 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -18,6 +18,7 @@
> #define DISP_GAMMA_EN 0x0000
> #define GAMMA_EN BIT(0)
> #define DISP_GAMMA_CFG 0x0020
> +#define RELAY_MODE BIT(0)
> #define GAMMA_LUT_EN BIT(1)
> #define GAMMA_DITHERING BIT(2)
> #define DISP_GAMMA_SIZE 0x0030
> @@ -99,6 +100,7 @@ void mtk_gamma_set_common(struct device *dev, void
> __iomem *regs, struct drm_crt
>
> if (state->gamma_lut) {
> reg = readl(regs + DISP_GAMMA_CFG);
> + reg = reg & ~RELAY_MODE;
> reg = reg | GAMMA_LUT_EN;
> writel(reg, regs + DISP_GAMMA_CFG);
> lut_base = regs + DISP_GAMMA_LUT;
