From b474cbbb2bfd8d38f8bc36165567fe153d89fc9a Mon Sep 17 00:00:00 2001 From: Archit Taneja Date: Fri, 16 Jun 2017 10:39:34 +0530 Subject: [PATCH] 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 Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c index 143eab4..1fb7645 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c @@ -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) -- 2.7.4