DP AUX transactions can consist of many short operations. There's no
need to power things up/down in short intervals.
I pick an arbitrary 100ms; for the systems I'm testing (Rockchip
RK3399), runtime-PM transitions only take a few microseconds.
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
---
Changes in v3:
- New in v3
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 16be279aed2c..d82a4ddf44e7 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1121,7 +1121,7 @@ static int analogix_dp_get_modes(struct drm_connector *connector)
pm_runtime_get_sync(dp->dev);
edid = drm_get_edid(connector, &dp->aux.ddc);
- pm_runtime_put(dp->dev);
+ pm_runtime_put_autosuspend(dp->dev);
if (edid) {
drm_connector_update_edid_property(&dp->connector,
edid);
@@ -1642,7 +1642,7 @@ static ssize_t analogix_dpaux_transfer(struct drm_dp_aux *aux,
ret = analogix_dp_transfer(dp, msg);
out:
- pm_runtime_put(dp->dev);
+ pm_runtime_put_autosuspend(dp->dev);
return ret;
}
@@ -1775,6 +1775,8 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
if (ret)
return ret;
+ pm_runtime_use_autosuspend(dp->dev);
+ pm_runtime_set_autosuspend_delay(dp->dev, 100);
pm_runtime_enable(dp->dev);
ret = analogix_dp_create_bridge(drm_dev, dp);
--
2.35.1.265.g69c8d7142f-goog
