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

[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>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.h
index 098f7218f83a..71e121f037cb 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.h
@@ -54,9 +54,12 @@ struct hdcp_workqueue {
 	uint8_t max_link;
 };
 
-void hdcp_add_display(struct hdcp_workqueue *hdcp_work, unsigned int link_index, struct amdgpu_dm_connector *aconnector,
-		      bool disable_type1);
-void hdcp_remove_display(struct hdcp_workqueue *work, unsigned int link_index, unsigned int display_index);
+void hdcp_update_display(struct hdcp_workqueue *hdcp_work,
+			 unsigned int link_index,
+			 struct amdgpu_dm_connector *aconnector,
+			 bool disable_type1,
+			 bool enable_encryption);
+
 void hdcp_reset_display(struct hdcp_workqueue *work, unsigned int link_index);
 void hdcp_handle_cpirq(struct hdcp_workqueue *work, unsigned int link_index);
 void hdcp_destroy(struct hdcp_workqueue *work);