drm/amd/display: Fix HW/SW state mismatch

[Why]
When we disable a connector we don't explicitly remove it from the module so the
display is still cached(SW) in the hdcp_module.

SST: no issues because we can only have 1 display per link

MST: We have x displays per link, now if we disable 1 we don't remove it from the
module so the module has x display cached(SW).

If we try to enable HDCP, psp verification will fail because we are reporting x
displays while the HW only has x-1 display enabled

[How]
Check the callback for when we disable stream and call remove display.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
index ae32933..0acd340 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_hdcp.c
@@ -135,6 +135,20 @@ void hdcp_update_display(struct hdcp_workqueue *hdcp_work,
        mutex_unlock(&hdcp_w->mutex);
 }
 
+static void hdcp_remove_display(struct hdcp_workqueue *hdcp_work,
+                        unsigned int link_index,
+                        struct amdgpu_dm_connector *aconnector)
+{
+       struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
+
+       mutex_lock(&hdcp_w->mutex);
+       hdcp_w->aconnector = aconnector;
+
+       mod_hdcp_remove_display(&hdcp_w->hdcp, aconnector->base.index, &hdcp_w->output);
+
+       process_output(hdcp_w);
+       mutex_unlock(&hdcp_w->mutex);
+}
 void hdcp_reset_display(struct hdcp_workqueue *hdcp_work, unsigned int link_index)
 {
        struct hdcp_workqueue *hdcp_w = &hdcp_work[link_index];
@@ -303,6 +317,11 @@ static void update_config(void *handle, struct cp_psp_stream_config *config)
        memset(link, 0, sizeof(*link));
 
        display->index = aconnector->base.index;
+
+       if (config->dpms_off) {
+               hdcp_remove_display(hdcp_work, link_index, aconnector);
+               return;
+       }
        display->state = MOD_HDCP_DISPLAY_ACTIVE;
 
        if (aconnector->dc_sink != NULL)