diff options
| author | Hsin-Yi Wang <hsinyi@chromium.org> | 2022-07-06 15:52:53 +0300 |
|---|---|---|
| committer | Robert Foss <robert.foss@linaro.org> | 2022-07-06 16:19:53 +0300 |
| commit | dfb02eb6bdf84697dbadd69a7df12db612ce4ed0 (patch) | |
| tree | 85ac66ba61ff4b18423cb9827d1647535d748265 /drivers/gpu/drm/bridge/analogix | |
| parent | aa1965973cc734bd61294b675ac9763cddcac0ed (diff) | |
| download | linux-dfb02eb6bdf84697dbadd69a7df12db612ce4ed0.tar.xz | |
drm/bridge: anx7625: Fix NULL pointer crash when using edp-panel
Move devm_of_dp_aux_populate_ep_devices() after pm runtime and i2c setup
to avoid NULL pointer crash.
edp-panel probe (generic_edp_panel_probe) calls pm_runtime_get_sync() to
read EDID. At this time, bridge should have pm runtime enabled and i2c
clients ready.
Fixes: adca62ec370c ("drm/bridge: anx7625: Support reading edid through aux channel")
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Xin Ji <xji@analogixsemi.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220706125254.2474095-4-hsinyi@chromium.org
Diffstat (limited to 'drivers/gpu/drm/bridge/analogix')
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/anx7625.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index fcf07a037c2c..aded20b9e25b 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -2590,14 +2590,6 @@ static int anx7625_i2c_probe(struct i2c_client *client, platform->aux.dev = dev; platform->aux.transfer = anx7625_aux_transfer; drm_dp_aux_init(&platform->aux); - devm_of_dp_aux_populate_ep_devices(&platform->aux); - - ret = anx7625_parse_dt(dev, pdata); - if (ret) { - if (ret != -EPROBE_DEFER) - DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret); - goto free_wq; - } if (anx7625_register_i2c_dummy_clients(platform, client) != 0) { ret = -ENOMEM; @@ -2613,6 +2605,15 @@ static int anx7625_i2c_probe(struct i2c_client *client, if (ret) goto free_wq; + devm_of_dp_aux_populate_ep_devices(&platform->aux); + + ret = anx7625_parse_dt(dev, pdata); + if (ret) { + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret); + goto free_wq; + } + if (!platform->pdata.low_power_mode) { anx7625_disable_pd_protocol(platform); pm_runtime_get_sync(dev); |