drm/mediatek: no change parent rate in round_rate() for MT2701 hdmi phy

[sfrench/cifs-2.6.git] / drivers / gpu / drm / mediatek / mtk_mt8173_hdmi_phy.c

diff --git a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
index 37f9503d7643350b1897f40df9cdb69cf14e87f0..47f8a295168224b525959bafb8f0e631ee799b2b 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
+++ b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
@@ -199,6 +199,20 @@ static void mtk_hdmi_pll_unprepare(struct clk_hw *hw)
        usleep_range(100, 150);
 }
 
+static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+                                   unsigned long *parent_rate)
+{
+       struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
+
+       hdmi_phy->pll_rate = rate;
+       if (rate <= 74250000)
+               *parent_rate = rate;
+       else
+               *parent_rate = rate / 2;
+
+       return rate;
+}
+
 static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
                                 unsigned long parent_rate)
 {