[PATCH 19/20] drm/amd/display: only enable HDCP for DCN+

[Bhawanpreet Lakha]

[Why]
We don't support HDCP for pre RAVEN asics

[How]
Check if we are RAVEN+. Use this to attach the content_protection
property, this way usermode can't try to enable HDCP on pre DCN asics.

Also we need to update the module on hpd so guard it aswell

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
Reviewed-by: Harry Wentland <harry.wentland at amd.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 20 +++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 879b70f2cb0d..a70c1f512dd2 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -733,14 +733,16 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 	amdgpu_dm_init_color_mod();
 
 #ifdef CONFIG_DRM_AMD_DC_HDCP
-	adev->dm.hdcp_workqueue = hdcp_create_workqueue(&adev->psp, &init_params.cp_psp, adev->dm.dc);
+	if (adev->asic_type >= CHIP_RAVEN) {
+		adev->dm.hdcp_workqueue = hdcp_create_workqueue(&adev->psp, &init_params.cp_psp, adev->dm.dc);
 
-	if (!adev->dm.hdcp_workqueue)
-		DRM_ERROR("amdgpu: failed to initialize hdcp_workqueue.\n");
-	else
-		DRM_DEBUG_DRIVER("amdgpu: hdcp_workqueue init done %p.\n", adev->dm.hdcp_workqueue);
+		if (!adev->dm.hdcp_workqueue)
+			DRM_ERROR("amdgpu: failed to initialize hdcp_workqueue.\n");
+		else
+			DRM_DEBUG_DRIVER("amdgpu: hdcp_workqueue init done %p.\n", adev->dm.hdcp_workqueue);
 
-	dc_init_callbacks(adev->dm.dc, &init_params);
+		dc_init_callbacks(adev->dm.dc, &init_params);
+	}
 #endif
 	if (amdgpu_dm_initialize_drm_device(adev)) {
 		DRM_ERROR(
@@ -1497,7 +1499,8 @@ static void handle_hpd_irq(void *param)
 	mutex_lock(&aconnector->hpd_lock);
 
 #ifdef CONFIG_DRM_AMD_DC_HDCP
-	hdcp_reset_display(adev->dm.hdcp_workqueue, aconnector->dc_link->link_index);
+	if (adev->asic_type >= CHIP_RAVEN)
+		hdcp_reset_display(adev->dm.hdcp_workqueue, aconnector->dc_link->link_index);
 #endif
 	if (aconnector->fake_enable)
 		aconnector->fake_enable = false;
@@ -5103,7 +5106,8 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
 		drm_object_attach_property(&aconnector->base.base,
 				adev->mode_info.freesync_capable_property, 0);
 #ifdef CONFIG_DRM_AMD_DC_HDCP
-		drm_connector_attach_content_protection_property(&aconnector->base, false);
+		if (adev->asic_type >= CHIP_RAVEN)
+			drm_connector_attach_content_protection_property(&aconnector->base, false);
 #endif
 	}
 }
-- 
2.17.1