[PATCH v6 3/4] drm/mediatek: add mt8183 dpi clock factor

Jitao Shi
2020-02-21T11:28:57Z

The factor depends on the divider of DPI in MT8183, therefore,
we should fix this factor to the right and new one.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 36e4dbd27d1b..e1a33254dfbe 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -675,6 +675,16 @@ static unsigned int mt2701_calculate_factor(int clock)
return 1;
}

+static unsigned int mt8183_calculate_factor(int clock)
+{
+ if (clock <= 27000)
+ return 8;
+ else if (clock <= 167000)
+ return 4;
+ else
+ return 2;
+}
+
static const struct mtk_dpi_conf mt8173_conf = {
.cal_factor = mt8173_calculate_factor,
.reg_h_fre_con = 0xe0,
@@ -686,6 +696,11 @@ static const struct mtk_dpi_conf mt2701_conf = {
.edge_sel_en = true,
};

+static const struct mtk_dpi_conf mt8183_conf = {
+ .cal_factor = mt8183_calculate_factor,
+ .reg_h_fre_con = 0xe0,
+};
+
static int mtk_dpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -782,6 +797,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
{ .compatible = "mediatek,mt8173-dpi",
.data = &mt8173_conf,
},
+ { .compatible = "mediatek,mt8183-dpi",
+ .data = &mt8183_conf,
+ },
{ },
};

--
2.21.0