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

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This is the third step to make MT2701 HDMI stable.
We should not change the rate of parent for hdmi phy when
doing round_rate for this clock. The parent clock of hdmi
phy must be the same as it. We change it when doing set_rate
only.

Signed-off-by: Wangyan Wang <wangyan.wang@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
This commit is contained in:
Wangyan Wang 2019-04-09 14:53:07 +08:00 committed by CK Hu
parent 8eeb3946fe
commit 9ee76098a1
4 changed files with 20 additions and 16 deletions
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14
drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
View file

@ -15,20 +15,6 @@ static const struct phy_ops mtk_hdmi_phy_dev_ops = {
.owner = THIS_MODULE,
};
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;
}
void mtk_hdmi_phy_clear_bits(struct mtk_hdmi_phy *hdmi_phy, u32 offset,
u32 bits)
{

2
drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
View file

@ -49,8 +49,6 @@ void mtk_hdmi_phy_set_bits(struct mtk_hdmi_phy *hdmi_phy, u32 offset,
void mtk_hdmi_phy_mask(struct mtk_hdmi_phy *hdmi_phy, u32 offset,
u32 val, u32 mask);
struct mtk_hdmi_phy *to_mtk_hdmi_phy(struct clk_hw *hw);
long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate);
extern struct platform_driver mtk_hdmi_phy_driver;
extern struct mtk_hdmi_phy_conf mtk_hdmi_phy_8173_conf;

6
drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
View file

@ -106,6 +106,12 @@ static void mtk_hdmi_pll_unprepare(struct clk_hw *hw)
usleep_range(80, 100);
}
static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
return rate;
}
static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{

14
drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
View file

@ -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)
{