Commit 958000cb authored by Harmanprit Tatla's avatar Harmanprit Tatla Committed by Alex Deucher
Browse files

drm/amd/display: Add CP_IRQ clear capability 



[Why]
Currently we do not clear the CP_IRQ bit upon receiving it.

[How]
Added a function to clear CP_IRQ bit.

Signed-off-by: default avatarHarmanprit Tatla <harmanprit.tatla@amd.com>
Acked-by: default avatarAurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 498563cf

drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c

+9 −0
Original line number Diff line number Diff line
@@ -470,6 +470,15 @@ enum mod_hdcp_status mod_hdcp_process_event(struct mod_hdcp *hdcp, 
		if (reset_status != MOD_HDCP_STATUS_SUCCESS)

			push_error_status(hdcp, reset_status);

	}



	/* Clear CP_IRQ status if needed */

	if (event_ctx.event == MOD_HDCP_EVENT_CPIRQ &&

			event_ctx.unexpected_event == 0) {

		status = mod_hdcp_clear_cp_irq_status(hdcp);

		if (status != MOD_HDCP_STATUS_SUCCESS)

			push_error_status(hdcp, status);

	}



	return status;

}

drivers/gpu/drm/amd/display/modules/hdcp/hdcp.h

+1 −0
Original line number Diff line number Diff line
@@ -386,6 +386,7 @@ enum mod_hdcp_status mod_hdcp_write_eks(struct mod_hdcp *hdcp); 
enum mod_hdcp_status mod_hdcp_write_repeater_auth_ack(struct mod_hdcp *hdcp);

enum mod_hdcp_status mod_hdcp_write_stream_manage(struct mod_hdcp *hdcp);

enum mod_hdcp_status mod_hdcp_write_content_type(struct mod_hdcp *hdcp);

enum mod_hdcp_status mod_hdcp_clear_cp_irq_status(struct mod_hdcp *hdcp);



/* hdcp version helpers */

static inline uint8_t is_dp_hdcp(struct mod_hdcp *hdcp)

drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c

+19 −0
Original line number Diff line number Diff line
@@ -645,3 +645,22 @@ enum mod_hdcp_status mod_hdcp_write_content_type(struct mod_hdcp *hdcp) 
		status = MOD_HDCP_STATUS_INVALID_OPERATION;

	return status;

}



enum mod_hdcp_status mod_hdcp_clear_cp_irq_status(struct mod_hdcp *hdcp)

{

	uint8_t clear_cp_irq_bit = 2;

	uint32_t size = 1;



	if (is_dp_hdcp(hdcp)) {

		if (hdcp->connection.link.dp.rev >= 0x14)

			return hdcp->config.ddc.funcs.write_dpcd(hdcp->config.ddc.handle,

					DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0, &clear_cp_irq_bit, size)

					? MOD_HDCP_STATUS_SUCCESS : MOD_HDCP_STATUS_DDC_FAILURE;

		else

			return hdcp->config.ddc.funcs.write_dpcd(hdcp->config.ddc.handle,

					DP_DEVICE_SERVICE_IRQ_VECTOR, &clear_cp_irq_bit, size)

					? MOD_HDCP_STATUS_SUCCESS : MOD_HDCP_STATUS_DDC_FAILURE;

	}



	return MOD_HDCP_STATUS_INVALID_OPERATION;

}