From: Lin Huang hl@rock-chips.com
When panel is shut down, we should make sure edp can be disabled to avoid undefined behavior.
Cc: Stéphane Marchesin marcheu@chromium.org Signed-off-by: Lin Huang hl@rock-chips.com Signed-off-by: zain wang wzz@rock-chips.com Signed-off-by: Sean Paul seanpaul@chromium.org Signed-off-by: Thierry Escande thierry.escande@collabora.com Reviewed-by: Andrzej Hajda a.hajda@samsung.com --- 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);