@@ -2991,6 +2991,28 @@ static void it6505_bridge_atomic_disable(struct drm_bridge *bridge,
}
}
+static void it6505_bridge_atomic_pre_enable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_state)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "start");
+
+ pm_runtime_get_sync(dev);
+}
+
+static void it6505_bridge_atomic_post_disable(struct drm_bridge *bridge,
+ struct drm_bridge_state *old_state)
+{
+ struct it6505 *it6505 = bridge_to_it6505(bridge);
+ struct device *dev = &it6505->client->dev;
+
+ DRM_DEV_DEBUG_DRIVER(dev, "start");
+
+ pm_runtime_put_sync(dev);
+}
+
static enum drm_connector_status
it6505_bridge_detect(struct drm_bridge *bridge)
{
@@ -3025,6 +3047,8 @@ static const struct drm_bridge_funcs it6505_bridge_funcs = {
.mode_valid = it6505_bridge_mode_valid,
.atomic_enable = it6505_bridge_atomic_enable,
.atomic_disable = it6505_bridge_atomic_disable,
+ .atomic_pre_enable = it6505_bridge_atomic_pre_enable,
+ .atomic_post_disable = it6505_bridge_atomic_post_disable,
.detect = it6505_bridge_detect,
.get_edid = it6505_bridge_get_edid,
};
Add atomic_pre_enable and atomic_post_disable callback to make sure the bridge is not powered off until atomic_post_disable is called. This prevents a power leakage when it6505 is powered off, but the upstream DRM bridge is still sending display signals. Fixes: b5c84a9edcd4 ("drm/bridge: add it6505 driver") Signed-off-by: Pin-yen Lin <treapking@chromium.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- Changes in v3: - Collect review tag drivers/gpu/drm/bridge/ite-it6505.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)