[PATCH v3 04/12] drm/mediatek: add clock factor for different IC

Bibby Hsieh bibby.hsieh at mediatek.com
Thu Sep 20 20:28:14 PDT 2018


From: chunhui dai <chunhui.dai at mediatek.com>

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 at mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 1e7369e0d91c..022ccec49cea 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -120,6 +120,7 @@ struct mtk_dpi_yc_limit {
 };
 
 struct mtk_dpi_conf {
+	unsigned int (*cal_factor)(int clock);
 	u32 reg_h_fre_con;
 	bool edge_sel_en;
 };
@@ -460,15 +461,7 @@ 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;
 
@@ -682,7 +675,20 @@ 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,
 };
 
-- 
2.12.5.2.gbdf23ab




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