drm/amd/display: enable assr

[Why]
assr is content protection for eDP, in order to use it we need to call
psp ta (dtm)

[How]
We have a enable_assr callback, hook into this and call the correct psp
cmd id to enable assr.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-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 dcf84a6..a8ee42d 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
@@ -390,6 +390,42 @@ void hdcp_destroy(struct hdcp_workqueue *hdcp_work)
        kfree(hdcp_work);
 }
 
+
+static bool enable_assr(void *handle, struct dc_link *link)
+{
+
+       struct hdcp_workqueue *hdcp_work = handle;
+       struct mod_hdcp hdcp = hdcp_work->hdcp;
+       struct psp_context *psp = hdcp.config.psp.handle;
+       struct ta_dtm_shared_memory *dtm_cmd;
+       bool res = true;
+
+       if (!psp->dtm_context.dtm_initialized) {
+               DRM_INFO("Failed to enable ASSR, DTM TA is not initialized.");
+               return false;
+       }
+
+       dtm_cmd = (struct ta_dtm_shared_memory *)psp->dtm_context.dtm_shared_buf;
+
+       mutex_lock(&psp->dtm_context.mutex);
+       memset(dtm_cmd, 0, sizeof(struct ta_dtm_shared_memory));
+
+       dtm_cmd->cmd_id = TA_DTM_COMMAND__TOPOLOGY_ASSR_ENABLE;
+       dtm_cmd->dtm_in_message.topology_assr_enable.display_topology_dig_be_index = link->link_enc_hw_inst;
+       dtm_cmd->dtm_status = TA_DTM_STATUS__GENERIC_FAILURE;
+
+       psp_dtm_invoke(psp, dtm_cmd->cmd_id);
+
+       if (dtm_cmd->dtm_status != TA_DTM_STATUS__SUCCESS) {
+               DRM_INFO("Failed to enable ASSR");
+               res = false;
+       }
+
+       mutex_unlock(&psp->dtm_context.mutex);
+
+       return res;
+}
+
 static void update_config(void *handle, struct cp_psp_stream_config *config)
 {
        struct hdcp_workqueue *hdcp_work = handle;
@@ -599,6 +635,7 @@ struct hdcp_workqueue *hdcp_create_workqueue(struct amdgpu_device *adev, struct
        }
 
        cp_psp->funcs.update_stream_config = update_config;
+       cp_psp->funcs.enable_assr = enable_assr;
        cp_psp->handle = hdcp_work;
 
        /* File created at /sys/class/drm/card0/device/hdcp_srm*/

diff --git a/drivers/gpu/drm/amd/display/dc/dm_cp_psp.h b/drivers/gpu/drm/amd/display/dc/dm_cp_psp.h
index 968c46d..5da7677 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dm_cp_psp.h
+++ b/drivers/gpu/drm/amd/display/dc/dm_cp_psp.h
@@ -38,6 +38,7 @@ struct cp_psp_stream_config {
 };
 
 struct cp_psp_funcs {
+       bool (*enable_assr)(void *handle, struct dc_link *link);
        void (*update_stream_config)(void *handle, struct cp_psp_stream_config *config);
 };