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drm/amd/display: Add dmub hpd sense callback

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[WHY]
HPD sense notification has been implemented in DMUB, which
can occur during low power states and need to be
notified from firmware to driver.

[HOW]
Define callback and register new HPD sense notification.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roman Li
2024-08-21 10:53:15 -04:00
committed by Alex Deucher
parent d18a56b247
commit 5a3d3e1134
2 changed files with 21 additions and 1 deletions
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20
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -807,6 +807,20 @@ static void dmub_hpd_callback(struct amdgpu_device *adev,
}
}
/**
* dmub_hpd_sense_callback - DMUB HPD sense processing callback.
* @adev: amdgpu_device pointer
* @notify: dmub notification structure
*
* HPD sense changes can occur during low power states and need to be
* notified from firmware to driver.
*/
static void dmub_hpd_sense_callback(struct amdgpu_device *adev,
struct dmub_notification *notify)
{
DRM_DEBUG_DRIVER("DMUB HPD SENSE callback.\n");
}
/**
* register_dmub_notify_callback - Sets callback for DMUB notify
* @adev: amdgpu_device pointer
@@ -3808,6 +3822,12 @@ static int register_hpd_handlers(struct amdgpu_device *adev)
DRM_ERROR("amdgpu: fail to register dmub hpd callback");
return -EINVAL;
}
if (!register_dmub_notify_callback(adev, DMUB_NOTIFICATION_HPD_SENSE_NOTIFY,
dmub_hpd_sense_callback, true)) {
DRM_ERROR("amdgpu: fail to register dmub hpd sense callback");
return -EINVAL;
}
}
list_for_each_entry(connector,