drm/msm: fix zero device count HDCP repeater test cases

Fix the handling of HDCP repeaters to mark part II
of the authentication as failure if they do not have
any devices connected to them.

Change-Id: I6b21ed2ce9a280f7e200404b05d111508a6d3dd8
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>

diff --git a/drivers/gpu/drm/msm/sde_hdcp_1x.c b/drivers/gpu/drm/msm/sde_hdcp_1x.c
index d08cf13..c2d29a0 100644 (file)
--- a/drivers/gpu/drm/msm/sde_hdcp_1x.c
+++ b/drivers/gpu/drm/msm/sde_hdcp_1x.c
@@ -1201,9 +1201,16 @@ static int sde_hdcp_1x_authentication_part2(struct sde_hdcp_1x *hdcp)
                if (rc)
                        goto error;
 
-               /* do not proceed further if no device connected */
-               if (!hdcp->current_tp.dev_count)
+               /*
+                * Do not proceed further if no device connected
+                * If no downstream devices are attached to the repeater
+                * then part II fails.
+                */
+
+               if (!hdcp->current_tp.dev_count) {
+                       rc = -EINVAL;
                        goto error;
+               }
 
                rc = sde_hdcp_1x_write_ksv_fifo(hdcp);
        } while (--v_retry && rc);