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drm/amd/display: Update CP property based on HW query

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[Why]
We need to use HW state to set content protection to ENABLED.
This way we know that the link is encrypted from the HW side

[How]
Create a workqueue that queries the HW every ~2seconds, and sets it to
ENABLED or DESIRED based on the result from the hardware

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Bhawanpreet Lakha
2019-06-10 16:06:05 -04:00
committed by Alex Deucher
parent 2a0f92700f
commit da3fd7ac0b
3 changed files with 73 additions and 15 deletions
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16
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@@ -5436,19 +5436,9 @@ static void update_content_protection(struct drm_connector_state *state, const s
{
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
if (state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED) {
hdcp_add_display(hdcp_w, aconnector->dc_link->link_index);
/*
* TODO: ENABLED should be verified using psp, it is planned later.
* Just set this to ENABLED for now
*/
state->content_protection = DRM_MODE_CONTENT_PROTECTION_ENABLED;
return;
}
if (state->content_protection == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
if (state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED)
hdcp_add_display(hdcp_w, aconnector->dc_link->link_index, aconnector);
else if (state->content_protection == DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
hdcp_remove_display(hdcp_w, aconnector->dc_link->link_index, aconnector->base.index);
}