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drm/exynos/hdmi: add core reset code 

To ensure HDMI-PHY reprogramming will not affect
HDMI the latter should be reset.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Andrzej Hajda 2016-03-23 14:15:14 +01:00 committed by Inki Dae
parent 5dd45e2cd2
commit 69f88877c3
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/exynos/exynos_hdmi.c
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@ -1659,6 +1659,10 @@ static void hdmi_mode_apply(struct hdmi_context *hdata)
static void hdmiphy_conf_reset(struct hdmi_context *hdata)
{
hdmi_reg_writemask(hdata, HDMI_CORE_RSTOUT, 0, 1);
usleep_range(10000, 12000);
hdmi_reg_writemask(hdata, HDMI_CORE_RSTOUT, ~0, 1);
usleep_range(10000, 12000);
hdmi_reg_writemask(hdata, HDMI_PHY_RSTOUT, ~0, HDMI_PHY_SW_RSTOUT);
usleep_range(10000, 12000);
hdmi_reg_writemask(hdata, HDMI_PHY_RSTOUT, 0, HDMI_PHY_SW_RSTOUT);