diff options
| author | Pin-yen Lin <treapking@chromium.org> | 2022-10-13 19:04:08 +0800 |
|---|---|---|
| committer | Robert Foss <robert.foss@linaro.org> | 2022-10-24 10:08:47 +0200 |
| commit | e577d4b13064c337b83fe7edecb3f34e87144821 (patch) | |
| tree | a62f1dc817686600c3880027979f9b0ea77003b7 /drivers/gpu/drm/bridge | |
| parent | 2556e1a83574f6248b70534c5d50e3ef9eaa4eb5 (diff) | |
| download | linux-e577d4b13064c337b83fe7edecb3f34e87144821.tar.bz2 | |
drm/bridge: it6505: Initialize AUX channel in it6505_i2c_probe
During device boot, the HPD interrupt could be triggered before the DRM
subsystem registers it6505 as a DRM bridge. In such cases, the driver
tries to access AUX channel and causes NULL pointer dereference.
Initializing the AUX channel earlier to prevent such error.
Fixes: b5c84a9edcd4 ("drm/bridge: add it6505 driver")
Signed-off-by: Pin-yen Lin <treapking@chromium.org>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20221013110411.1674359-2-treapking@chromium.org
Diffstat (limited to 'drivers/gpu/drm/bridge')
| -rw-r--r-- | drivers/gpu/drm/bridge/ite-it6505.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index 1fd09911fe8c..24460beb5905 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -2871,10 +2871,7 @@ static int it6505_bridge_attach(struct drm_bridge *bridge, } /* Register aux channel */ - it6505->aux.name = "DP-AUX"; - it6505->aux.dev = dev; it6505->aux.drm_dev = bridge->dev; - it6505->aux.transfer = it6505_aux_transfer; ret = drm_dp_aux_register(&it6505->aux); @@ -3354,6 +3351,11 @@ static int it6505_i2c_probe(struct i2c_client *client, debugfs_init(it6505); pm_runtime_enable(dev); + it6505->aux.name = "DP-AUX"; + it6505->aux.dev = dev; + it6505->aux.transfer = it6505_aux_transfer; + drm_dp_aux_init(&it6505->aux); + it6505->bridge.funcs = &it6505_bridge_funcs; it6505->bridge.type = DRM_MODE_CONNECTOR_DisplayPort; it6505->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | |