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    Subject[PATCH v11 6/9] drm/mediatek: add has_dither private data for gamma
    Date
    From: Yongqiang Niu <yongqiang.niu@mediatek.com>

    Not all SoC has dither function in gamma module.
    Add private data to control this function setting.

    Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
    Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
    Reviewed-by: CK Hu <ck.hu@mediatek.com>
    ---
    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 a7e2e326b2183..22199ef11f65d 100644
    --- a/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
    +++ b/drivers/gpu/drm/mediatek/mtk_disp_gamma.c
    @@ -26,7 +26,7 @@
    #define LUT_10BIT_MASK 0x03ff

    struct mtk_disp_gamma_data {
    - u32 reserved;
    + bool has_dither;
    };

    /**
    @@ -92,7 +92,8 @@ void mtk_gamma_config(struct device *dev, unsigned int w,

    mtk_ddp_write(cmdq_pkt, h << 16 | w, &gamma->cmdq_reg, gamma->regs,
    DISP_GAMMA_SIZE);
    - mtk_dither_set_common(gamma->regs, &gamma->cmdq_reg, bpc, DISP_GAMMA_CFG, cmdq_pkt);
    + if (gamma->data && gamma->data->has_dither)
    + mtk_dither_set_common(gamma->regs, &gamma->cmdq_reg, bpc, DISP_GAMMA_CFG, cmdq_pkt);
    }

    void mtk_gamma_start(struct device *dev)
    @@ -172,8 +173,13 @@ 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 = &mt8173_gamma_driver_data},
    {},
    };
    MODULE_DEVICE_TABLE(of, mtk_disp_gamma_driver_dt_match);
    --
    2.30.0.280.ga3ce27912f-goog
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