Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 24b42cba authored by Ramalingam C's avatar Ramalingam C Committed by Sean Paul
Browse files

drm/i915: Start repeater auth on READY/CP_IRQ 



Second stage of HDCP authentication starts at CP_IRQ or at the
assertion of READY bit from Repeater.

Till then repeater will be authenticating with its downstream devices.
So authenticated device count, depth and ksv_list readable from
repeaters are valid only after assertion of READY/CP_IRQ.

This patch makes sure that READY is polled before reading any
topology information.

Signed-off-by: default avatarRamalingam C <ramalingam.c@intel.com>
Signed-off-by: default avatarSean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1516254488-4971-4-git-send-email-ramalingam.c@intel.com
parent 87eb3ec8

drivers/gpu/drm/i915/intel_hdcp.c

+6 −6
Original line number Diff line number Diff line
@@ -150,6 +150,12 @@ int intel_hdcp_auth_downstream(struct intel_digital_port *intel_dig_port, 


	dev_priv = intel_dig_port->base.base.dev->dev_private;



	ret = intel_hdcp_poll_ksv_fifo(intel_dig_port, shim);

	if (ret) {

		DRM_ERROR("KSV list failed to become ready (%d)\n", ret);

		return ret;

	}



	ret = shim->read_bstatus(intel_dig_port, bstatus);

	if (ret)

		return ret;
@@ -161,12 +167,6 @@ int intel_hdcp_auth_downstream(struct intel_digital_port *intel_dig_port, 
		return 0;

	}



	ret = intel_hdcp_poll_ksv_fifo(intel_dig_port, shim);

	if (ret) {

		DRM_ERROR("KSV list failed to become ready (%d)\n", ret);

		return ret;

	}



	ksv_fifo = kzalloc(num_downstream * DRM_HDCP_KSV_LEN, GFP_KERNEL);

	if (!ksv_fifo)

		return -ENOMEM;