diff options
| author | Stefan Eichenberger <stefan.eichenberger@toradex.com> | 2022-11-23 12:53:44 +0100 |
|---|---|---|
| committer | Stefan Eichenberger <eichest@gmail.com> | 2022-11-30 09:35:02 +0100 |
| commit | 7a0fb5176950eae0f9e40822903b01c27d2fc3c9 (patch) | |
| tree | 2849048bccd8d6181cd14435895eeed970cea3ce /drivers | |
| parent | 5004d6988db33c786b4b60a56078b83740f46ec6 (diff) | |
drm/bridge: lt8912b: Add hot plug detection
Enable hot plug detection when it is available on the HDMI port.
Without this connecting to a different monitor with incompatible timing
before the 10 seconds poll period will lead to a broken display output.
Upstream-Status: Submitted [https://lore.kernel.org/all/20221128112320.25708-1-francesco@dolcini.it/]
Fixes: 30e2ae943c26 ("drm/bridge: Introduce LT8912B DSI to HDMI bridge")
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/bridge/lontium-lt8912b.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c index b109ad89f638..b26a052aa7bc 100644 --- a/drivers/gpu/drm/bridge/lontium-lt8912b.c +++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c @@ -526,14 +526,27 @@ static void lt8912_detach_dsi(struct lt8912 *lt) mipi_dsi_device_unregister(lt->dsi); } +static void lt8912_bridge_hpd_cb(void *data, enum drm_connector_status status) +{ + struct lt8912 *lt = data; + + if (lt->bridge.dev) + drm_helper_hpd_irq_event(lt->bridge.dev); +} + static int lt8912_bridge_connector_init(struct drm_bridge *bridge) { int ret; struct lt8912 *lt = bridge_to_lt8912(bridge); struct drm_connector *connector = <->connector; - connector->polled = DRM_CONNECTOR_POLL_CONNECT | - DRM_CONNECTOR_POLL_DISCONNECT; + if (lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD) { + drm_bridge_hpd_enable(lt->hdmi_port, lt8912_bridge_hpd_cb, lt); + connector->polled = DRM_CONNECTOR_POLL_HPD; + } else { + connector->polled = DRM_CONNECTOR_POLL_CONNECT | + DRM_CONNECTOR_POLL_DISCONNECT; + } ret = drm_connector_init(bridge->dev, connector, <8912_connector_funcs, @@ -592,6 +605,10 @@ static void lt8912_bridge_detach(struct drm_bridge *bridge) if (lt->is_attached) { lt8912_detach_dsi(lt); lt8912_hard_power_off(lt); + + if (lt->hdmi_port->ops & DRM_BRIDGE_OP_HPD) + drm_bridge_hpd_disable(lt->hdmi_port); + drm_connector_unregister(<->connector); drm_connector_cleanup(<->connector); } |