Commit f28dd507 authored by Brian Norris's avatar Brian Norris Committed by Douglas Anderson
Browse files

drm/bridge: analogix_dp: Enable autosuspend 



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: default avatarBrian Norris <briannorris@chromium.org>
Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Signed-off-by: default avatarDouglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220301181107.v4.2.I48b18ab197c9b649d376cf8cfd934e59d338f86d@changeid
parent 8fb6c44f

drivers/gpu/drm/bridge/analogix/analogix_dp_core.c

+6 −3
Original line number Diff line number Diff line
@@ -1119,9 +1119,7 @@ static int analogix_dp_get_modes(struct drm_connector *connector) 
			return 0;

		}



		pm_runtime_get_sync(dp->dev);

		edid = drm_get_edid(connector, &dp->aux.ddc);

		pm_runtime_put(dp->dev);

		if (edid) {

			drm_connector_update_edid_property(&dp->connector,

							   edid);
@@ -1642,7 +1640,8 @@ 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_mark_last_busy(dp->dev);

	pm_runtime_put_autosuspend(dp->dev);



	return ret;

}
@@ -1775,6 +1774,8 @@ 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);
@@ -1786,6 +1787,7 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev) 
	return 0;



err_disable_pm_runtime:

	pm_runtime_dont_use_autosuspend(dp->dev);

	pm_runtime_disable(dp->dev);

	drm_dp_aux_unregister(&dp->aux);
@@ -1804,6 +1806,7 @@ void analogix_dp_unbind(struct analogix_dp_device *dp) 
	}



	drm_dp_aux_unregister(&dp->aux);

	pm_runtime_dont_use_autosuspend(dp->dev);

	pm_runtime_disable(dp->dev);

}

EXPORT_SYMBOL_GPL(analogix_dp_unbind);