From: chunhui dai <chunhui.dai@mediatek.com>
Date: Wed, 3 Oct 2018 03:41:44 +0000 (+0800)
Subject: drm/mediatek: add clock factor for different IC
X-Git-Tag: v5.15~7648^2~8^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=55c78aa5c808ba7a95bf271a3486f0d14be519ce;p=platform%2Fkernel%2Flinux-starfive.git

drm/mediatek: add clock factor for different IC

different IC has different clock designed in HDMI, the factor for
calculate clock should be different. Usinng the data in of_node
to find this factor.

Signed-off-by: chunhui dai <chunhui.dai@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 0ce4b61..0dbe934 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -113,6 +113,7 @@ struct mtk_dpi_yc_limit {
 };
 
 struct mtk_dpi_conf {
+	unsigned int (*cal_factor)(int clock);
 	u32 reg_h_fre_con;
 	bool edge_sel_en;
 };
@@ -431,15 +432,7 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
 	unsigned int factor;
 
 	/* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */
-
-	if (mode->clock <= 27000)
-		factor = 3 << 4;
-	else if (mode->clock <= 84000)
-		factor = 3 << 3;
-	else if (mode->clock <= 167000)
-		factor = 3 << 2;
-	else
-		factor = 3 << 1;
+	factor = dpi->conf->cal_factor(mode->clock);
 	drm_display_mode_to_videomode(mode, &vm);
 	pll_rate = vm.pixelclock * factor;
 
@@ -653,7 +646,20 @@ static const struct component_ops mtk_dpi_component_ops = {
 	.unbind = mtk_dpi_unbind,
 };
 
+static unsigned int mt8173_calculate_factor(int clock)
+{
+	if (clock <= 27000)
+		return 3 << 4;
+	else if (clock <= 84000)
+		return 3 << 3;
+	else if (clock <= 167000)
+		return 3 << 2;
+	else
+		return 3 << 1;
+}
+
 static const struct mtk_dpi_conf mt8173_conf = {
+	.cal_factor = mt8173_calculate_factor,
 	.reg_h_fre_con = 0xe0,
 };