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drm/amd/display: Refactor HDCP to handle multiple displays per link

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[Why]
We need to do this to support HDCP over MST

Currently we save a display per link, in a MST case we need to save
multiple displays per link.

[How]
We can create an array per link to cache the displays, but it
complicates the design. Instead we can use the module to cache the
displays.

Now we will always add all the displays to the module, but we use the
adjustment flag to disable hdcp on all of them before they are added.

When we want to enable hdcp we just query the display(cache), remove
it then add it back with different adjustments. Its the similar for
disable.

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
2019-08-28 15:10:03 -04:00
committed by Alex Deucher
parent 53e108aa99
commit b1abe5586f
3 changed files with 40 additions and 42 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@@ -5867,20 +5867,6 @@ static bool is_content_protection_different(struct drm_connector_state *state,
return false;
}
static void update_content_protection(struct drm_connector_state *state, const struct drm_connector *connector,
struct hdcp_workqueue *hdcp_w)
{
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
bool disable_type1 = state->hdcp_content_type == DRM_MODE_HDCP_CONTENT_TYPE0 ? true : false;
if (state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED) {
hdcp_reset_display(hdcp_w, aconnector->dc_link->link_index);
hdcp_add_display(hdcp_w, aconnector->dc_link->link_index, aconnector, disable_type1);
} else if (state->content_protection == DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
hdcp_remove_display(hdcp_w, aconnector->dc_link->link_index, aconnector->base.index);
}
}
#endif
static void remove_stream(struct amdgpu_device *adev,
struct amdgpu_crtc *acrtc,
@@ -6850,7 +6836,11 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
}
if (is_content_protection_different(new_con_state, old_con_state, connector, adev->dm.hdcp_workqueue))
update_content_protection(new_con_state, connector, adev->dm.hdcp_workqueue);
hdcp_update_display(
adev->dm.hdcp_workqueue, aconnector->dc_link->link_index, aconnector,
new_con_state->hdcp_content_type == DRM_MODE_HDCP_CONTENT_TYPE0 ? true : false,
new_con_state->content_protection == DRM_MODE_CONTENT_PROTECTION_DESIRED ? true
: false);
}
#endif