[v2,19/43] drm/bridge: analogix_dp: Ensure edp is disabled when shutting down the panel
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Message ID 20180126131710.7622-20-thierry.escande@collabora.com
State New
Headers show

Commit Message

Thierry Escande Jan. 26, 2018, 1:16 p.m. UTC
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: St├ęphane 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(+)

Patch
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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);