diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2015-08-22 01:07:38 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2015-08-22 01:07:38 +0300 |
| commit | a887adadb7b9ef9eb4ee48e4ad575aefcfd1db14 (patch) | |
| tree | 69d043ef13654bb4090e34becb3700917def76b5 /drivers/gpu/drm/amd | |
| parent | 924f92bf12bfbef3662619e3ed24a1cea7c1cbcd (diff) | |
| download | linux-a887adadb7b9ef9eb4ee48e4ad575aefcfd1db14.tar.xz | |
drm/amdgpu: Don't link train DisplayPort on HPD until we get the dpcd
This is a port of:
DRM - radeon: Don't link train DisplayPort on HPD until we get the dpcd
to amdgpu.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/amd')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c index 27df17a0e620..89c3dd62ba21 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c @@ -75,6 +75,11 @@ void amdgpu_connector_hotplug(struct drm_connector *connector) if (!amdgpu_display_hpd_sense(adev, amdgpu_connector->hpd.hpd)) { drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF); } else if (amdgpu_atombios_dp_needs_link_train(amdgpu_connector)) { + /* Don't try to start link training before we + * have the dpcd */ + if (!amdgpu_atombios_dp_get_dpcd(amdgpu_connector)) + return; + /* set it to OFF so that drm_helper_connector_dpms() * won't return immediately since the current state * is ON at this point. |