diff options
| author | Grazvydas Ignotas <notasas@gmail.com> | 2016-10-09 20:28:19 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-10-12 15:44:12 -0400 |
| commit | 40492f60794aaf32576cb42d9af86eed785a6e63 (patch) | |
| tree | e34852ace546e9ed191cc74273b1ee753f6bed35 | |
| parent | 69405d3da98b48633b78a49403e4f9cdb7c6a0f5 (diff) | |
drm/amdgpu: use .early_unregister hook to remove DP AUX i2c
When DisplayPort AUX channel i2c adapter is registered, drm_connector's
kdev member is used as a parent, so we get sysfs structure like:
/drm/card1/card1-DP-2/i2c-12
Because of that, there is a problem when drm core (and not the driver)
calls drm_connector_unregister(), it removes parent sysfs entries
('card1-DP-2' in our example) while the i2c adapter is still registered.
Later we get a WARN when we try to unregister the i2c adapter:
WARNING: CPU: 3 PID: 1374 at fs/sysfs/group.c:243 sysfs_remove_group+0x14c/0x150
sysfs group ffffffff82911e40 not found for kobject 'i2c-12'
To fix it, we can use the .early_unregister hook to unregister the i2c
adapter before drm_connector's sysfs is torn down.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c index 2e3a0543760d..e3281d4e3e41 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c @@ -765,7 +765,7 @@ amdgpu_connector_lvds_detect(struct drm_connector *connector, bool force) return ret; } -static void amdgpu_connector_destroy(struct drm_connector *connector) +static void amdgpu_connector_unregister(struct drm_connector *connector) { struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector); @@ -773,6 +773,12 @@ static void amdgpu_connector_destroy(struct drm_connector *connector) drm_dp_aux_unregister(&amdgpu_connector->ddc_bus->aux); amdgpu_connector->ddc_bus->has_aux = false; } +} + +static void amdgpu_connector_destroy(struct drm_connector *connector) +{ + struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector); + amdgpu_connector_free_edid(connector); kfree(amdgpu_connector->con_priv); drm_connector_unregister(connector); @@ -826,6 +832,7 @@ static const struct drm_connector_funcs amdgpu_connector_lvds_funcs = { .dpms = drm_helper_connector_dpms, .detect = amdgpu_connector_lvds_detect, .fill_modes = drm_helper_probe_single_connector_modes, + .early_unregister = amdgpu_connector_unregister, .destroy = amdgpu_connector_destroy, .set_property = amdgpu_connector_set_lcd_property, }; @@ -936,6 +943,7 @@ static const struct drm_connector_funcs amdgpu_connector_vga_funcs = { .dpms = drm_helper_connector_dpms, .detect = amdgpu_connector_vga_detect, .fill_modes = drm_helper_probe_single_connector_modes, + .early_unregister = amdgpu_connector_unregister, .destroy = amdgpu_connector_destroy, .set_property = amdgpu_connector_set_property, }; @@ -1203,6 +1211,7 @@ static const struct drm_connector_funcs amdgpu_connector_dvi_funcs = { .detect = amdgpu_connector_dvi_detect, .fill_modes = drm_helper_probe_single_connector_modes, .set_property = amdgpu_connector_set_property, + .early_unregister = amdgpu_connector_unregister, .destroy = amdgpu_connector_destroy, .force = amdgpu_connector_dvi_force, }; @@ -1493,6 +1502,7 @@ static const struct drm_connector_funcs amdgpu_connector_dp_funcs = { .detect = amdgpu_connector_dp_detect, .fill_modes = drm_helper_probe_single_connector_modes, .set_property = amdgpu_connector_set_property, + .early_unregister = amdgpu_connector_unregister, .destroy = amdgpu_connector_destroy, .force = amdgpu_connector_dvi_force, }; @@ -1502,6 +1512,7 @@ static const struct drm_connector_funcs amdgpu_connector_edp_funcs = { .detect = amdgpu_connector_dp_detect, .fill_modes = drm_helper_probe_single_connector_modes, .set_property = amdgpu_connector_set_lcd_property, + .early_unregister = amdgpu_connector_unregister, .destroy = amdgpu_connector_destroy, .force = amdgpu_connector_dvi_force, }; |