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Commit 5a70dd3b authored by Christopher Braga's avatar Christopher Braga
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drm/msm/dp: update HDCP worker to wait for sink synchronization 



Prevent HDCP worker from operating when sink synchronization has not
been achieved to prevent HDCP authentication issues with some sinks.

Change-Id: Id7948f53c60c5417306f7615c00e8a0ff7cbdeca
Signed-off-by: default avatarChristopher Braga <cbraga@codeaurora.org>
parent 2bdc98a7

drivers/gpu/drm/msm/dp/dp_display.c

+9 −0
Original line number Diff line number Diff line
@@ -307,12 +307,21 @@ static void dp_display_hdcp_cb_work(struct work_struct *work) 
	void *data;

	int rc = 0;

	u32 hdcp_auth_state;

	u8 sink_status = 0;



	dp = container_of(dw, struct dp_display_private, hdcp_cb_work);



	if (!dp->power_on || !dp->is_connected || atomic_read(&dp->aborted))

		return;



	drm_dp_dpcd_readb(dp->aux->drm_aux, DP_SINK_STATUS, &sink_status);

	sink_status &= (DP_RECEIVE_PORT_0_STATUS | DP_RECEIVE_PORT_1_STATUS);

	if (sink_status < 1) {

		pr_debug("Sink not synchronized. Queuing again then exiting\n");

		queue_delayed_work(dp->wq, &dp->hdcp_cb_work, HZ);

		return;

	}



	status = &dp->link->hdcp_status;



	if (status->hdcp_state == HDCP_STATE_INACTIVE) {