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drm/msm/hdmi: 8996 PLL: Populate unprepare 

Without doing anything in unprepare, the HDMI driver isn't able to
switch modes successfully. Calling set_rate with a new rate results
in an un-locked PLL.

If we reset the PLL in unprepare, the PLL is able to lock with the
new rate.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Archit Taneja 2017-06-16 10:39:34 +05:30 committed by Rob Clark
parent ffe8f53f9c
commit b474cbbb2b
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c
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@ -670,6 +670,11 @@ static unsigned long hdmi_8996_pll_recalc_rate(struct clk_hw *hw,
static void hdmi_8996_pll_unprepare(struct clk_hw *hw)
{
struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw);
struct hdmi_phy *phy = pll_get_phy(pll);
hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x6);
usleep_range(100, 150);
}
static int hdmi_8996_pll_is_enabled(struct clk_hw *hw)