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drm/rockchip: dw-dp: Check hpd status before power down link

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Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
Change-Id: I3a05b3520d71ef5f0429a2c33933db62f3a2fffc
This commit is contained in:
Wyon Bi
2021-11-27 11:02:35 +08:00
parent 4ef5723d99
commit e3093cade8
1 changed files with 14 additions and 13 deletions
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27
drivers/gpu/drm/rockchip/dw-dp.c
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@@ -419,6 +419,18 @@ static bool dw_dp_bandwidth_ok(struct dw_dp *dp,
return true;
}
static bool dw_dp_detect(struct dw_dp *dp)
{
u32 value;
if (dp->hpd_gpio)
return gpiod_get_value_cansleep(dp->hpd_gpio);
regmap_read(dp->regmap, DPTX_HPD_STATUS, &value);
return !!(value & HPD_STATUS);
}
static enum drm_connector_status
dw_dp_connector_detect(struct drm_connector *connector, bool force)
{
@@ -1707,7 +1719,8 @@ static bool dw_dp_needs_link_retrain(struct dw_dp *dp)
static void dw_dp_link_disable(struct dw_dp *dp)
{
dw_dp_link_power_down(dp);
if (dw_dp_detect(dp))
dw_dp_link_power_down(dp);
dw_dp_phy_xmit_enable(dp, 0);
@@ -1776,18 +1789,6 @@ static void dw_dp_bridge_atomic_disable(struct drm_bridge *bridge,
video->stream_on = false;
}
static bool dw_dp_detect(struct dw_dp *dp)
{
u32 value;
if (dp->hpd_gpio)
return gpiod_get_value_cansleep(dp->hpd_gpio);
regmap_read(dp->regmap, DPTX_HPD_STATUS, &value);
return !!(value & HPD_STATUS);
}
static enum drm_connector_status dw_dp_bridge_detect(struct drm_bridge *bridge)
{
struct dw_dp *dp = bridge_to_dp(bridge);