From 439adf72726462a0245822d1434f908d451a46ad Mon Sep 17 00:00:00 2001 From: Pin-yen Lin Date: Tue, 4 Oct 2022 12:49:43 +0800 Subject: drm/bridge: it6505: Add pre_enable/post_disable callback 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 Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20221004044943.2407781-3-treapking@chromium.org --- drivers/gpu/drm/bridge/ite-it6505.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'drivers') diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index ae1105334ca5..a4302492cf8d 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -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, }; -- cgit v1.2.3