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    Subject[PATCH v4, 18/33] drm/mediatek: add component DITHER
    Date
    From: Yongqiang Niu <yongqiang.niu@mediatek.com>

    This patch add component DITHER

    Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
    Reviewed-by: CK Hu <ck.hu@mediatek.com>
    ---
    drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 32 +++++++++++++++++++++++++++++
    drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 2 ++
    2 files changed, 34 insertions(+)

    diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
    index 1aa4224..bc92a1b 100644
    --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
    +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
    @@ -47,6 +47,12 @@
    #define CCORR_RELAY_MODE BIT(0)
    #define DISP_CCORR_SIZE 0x0030

    +#define DISP_DITHER_EN 0x0000
    +#define DITHER_EN BIT(0)
    +#define DISP_DITHER_CFG 0x0020
    +#define DITHER_RELAY_MODE BIT(0)
    +#define DISP_DITHER_SIZE 0x0030
    +
    #define DISP_GAMMA_EN 0x0000
    #define DISP_GAMMA_CFG 0x0020
    #define DISP_GAMMA_SIZE 0x0030
    @@ -155,6 +161,24 @@ static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
    writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
    }

    +static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
    + unsigned int h, unsigned int vrefresh,
    + unsigned int bpc)
    +{
    + writel(h << 16 | w, comp->regs + DISP_DITHER_SIZE);
    + writel(DITHER_RELAY_MODE, comp->regs + DISP_DITHER_CFG);
    +}
    +
    +static void mtk_dither_start(struct mtk_ddp_comp *comp)
    +{
    + writel(DITHER_EN, comp->regs + DISP_DITHER_EN);
    +}
    +
    +static void mtk_dither_stop(struct mtk_ddp_comp *comp)
    +{
    + writel_relaxed(0x0, comp->regs + DISP_DITHER_EN);
    +}
    +
    static void mtk_gamma_config(struct mtk_ddp_comp *comp, unsigned int w,
    unsigned int h, unsigned int vrefresh,
    unsigned int bpc)
    @@ -209,6 +233,12 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
    .stop = mtk_ccorr_stop,
    };

    +static const struct mtk_ddp_comp_funcs ddp_dither = {
    + .config = mtk_dither_config,
    + .start = mtk_dither_start,
    + .stop = mtk_dither_stop,
    +};
    +
    static const struct mtk_ddp_comp_funcs ddp_gamma = {
    .gamma_set = mtk_gamma_set,
    .config = mtk_gamma_config,
    @@ -234,6 +264,7 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
    [MTK_DISP_CCORR] = "ccorr",
    [MTK_DISP_AAL] = "aal",
    [MTK_DISP_GAMMA] = "gamma",
    + [MTK_DISP_DITHER] = "dither",
    [MTK_DISP_UFOE] = "ufoe",
    [MTK_DSI] = "dsi",
    [MTK_DPI] = "dpi",
    @@ -256,6 +287,7 @@ struct mtk_ddp_comp_match {
    [DDP_COMPONENT_CCORR] = { MTK_DISP_CCORR, 0, &ddp_ccorr },
    [DDP_COMPONENT_COLOR0] = { MTK_DISP_COLOR, 0, NULL },
    [DDP_COMPONENT_COLOR1] = { MTK_DISP_COLOR, 1, NULL },
    + [DDP_COMPONENT_DITHER] = { MTK_DISP_DITHER, 0, &ddp_dither },
    [DDP_COMPONENT_DPI0] = { MTK_DPI, 0, NULL },
    [DDP_COMPONENT_DPI1] = { MTK_DPI, 1, NULL },
    [DDP_COMPONENT_DSI0] = { MTK_DSI, 0, NULL },
    diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
    index 8ac9f62..a0ea8c9 100644
    --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
    +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
    @@ -30,6 +30,7 @@ enum mtk_ddp_comp_type {
    MTK_DISP_WDMA,
    MTK_DISP_COLOR,
    MTK_DISP_CCORR,
    + MTK_DISP_DITHER,
    MTK_DISP_AAL,
    MTK_DISP_GAMMA,
    MTK_DISP_UFOE,
    @@ -49,6 +50,7 @@ enum mtk_ddp_comp_id {
    DDP_COMPONENT_CCORR,
    DDP_COMPONENT_COLOR0,
    DDP_COMPONENT_COLOR1,
    + DDP_COMPONENT_DITHER,
    DDP_COMPONENT_DPI0,
    DDP_COMPONENT_DPI1,
    DDP_COMPONENT_DSI0,
    --
    1.8.1.1.dirty
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