From: Lin Huang <hl@xxxxxxxxxxxxxx>
When panel is shut down, we should make sure edp can be disabled to avoid
undefined behavior.
Cc: Stéphane Marchesin <marcheu@xxxxxxxxxxxx>
Signed-off-by: Lin Huang <hl@xxxxxxxxxxxxxx>
Signed-off-by: zain wang <wzz@xxxxxxxxxxxxxx>
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx>
Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
---
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index c940a5bb80ac..fa4ef28e286f 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1161,6 +1161,12 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
pm_runtime_get_sync(dp->dev);
+ ret = clk_prepare_enable(dp->clock);
+ if (ret < 0) {
+ DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret);
+ goto out_dp_clk_pre;
+ }
+
if (dp->plat_data->power_on)
dp->plat_data->power_on(dp->plat_data);
@@ -1192,6 +1198,8 @@ static int analogix_dp_set_bridge(struct analogix_dp_device *dp)
phy_power_off(dp->phy);
if (dp->plat_data->power_off)
dp->plat_data->power_off(dp->plat_data);
+ clk_disable_unprepare(dp->clock);
+out_dp_clk_pre:
pm_runtime_put_sync(dp->dev);
return ret;
@@ -1235,10 +1243,13 @@ static void analogix_dp_bridge_disable(struct drm_bridge *bridge)
disable_irq(dp->irq);
phy_power_off(dp->phy);
+ analogix_dp_set_analog_power_down(dp, POWER_ALL, 1);
if (dp->plat_data->power_off)
dp->plat_data->power_off(dp->plat_data);
+ clk_disable_unprepare(dp->clock);
+
pm_runtime_put_sync(dp->dev);
ret = analogix_dp_prepare_panel(dp, false, true);
--
2.14.1
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