Hi, Yongqiang:
Yongqiang Niu 於 2021年1月7日 週四 上午11:12寫道：
>
> not all SoC has dither function in gamma module
> dd private data to control this function setting
'add' ?
>
> Signed-off-by: Yongqiang Niu
> ---
> drivers/gpu/drm/mediatek/mtk_disp_gamma.c | 12 +---
> 1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> index 8501821..4eab82a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
> @@ -24,7 +24,7 @@
> #define LUT_10BIT_MASK 0x03ff
>
> struct mtk_disp_gamma_data {
> - u32 reserved;
> + bool has_dither;
> };
>
> /**
> @@ -72,7 +72,8 @@ static void mtk_gamma_config(struct mtk_ddp_comp *comp,
> unsigned int w,
>
> mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_GAMMA_SIZE);
>
> - mtk_dither_set(comp, bpc, DISP_GAMMA_CFG, cmdq_pkt);
> + if (gamma->data && gamma->data->has_dither)
> + mtk_dither_set(comp, bpc, DISP_GAMMA_CFG, cmdq_pkt);
> }
>
> static void mtk_gamma_start(struct mtk_ddp_comp *comp)
> @@ -168,8 +169,13 @@ static int mtk_disp_gamma_remove(struct platform_device
> *pdev)
> return 0;
> }
>
> +static const struct mtk_disp_gamma_data mt8173_gamma_driver_data = {
> + .has_dither = true,
> +};
> +
> static const struct of_device_id mtk_disp_gamma_driver_dt_match[] = {
> - { .compatible = "mediatek,mt8173-disp-gamma"},
> + { .compatible = "mediatek,mt8173-disp-gamma",
> + .data = _gamma_driver_data},
> {},
> };
> MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
> --
> 1.8.1.1.dirty
> ___
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