From: Jitao Shi <jitao.shi@mediatek.com>
Date: Tue, 25 Feb 2020 09:40:56 +0000 (+0800)
Subject: drm/mediatek: add mt8183 dpi clock factor
X-Git-Tag: v5.7-rc1~136^2~6^2~1
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b472094402f19d940fa447fd2bdcbb1fdf1e38c0;p=thirdparty%2Fkernel%2Flinux.git

drm/mediatek: add mt8183 dpi clock factor

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>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
---

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 01fa8b8d763d1..087f5ce732e18 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -664,6 +664,16 @@ 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,
@@ -675,6 +685,11 @@ 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;
@@ -770,6 +785,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
 	{ .compatible = "mediatek,mt8173-dpi",
 	  .data = &mt8173_conf,
 	},
+	{ .compatible = "mediatek,mt8183-dpi",
+	  .data = &mt8183_conf,
+	},
 	{ },
 };