[PATCH v4 07/11] drm/bridge: it6505: fix HDCP encription not enable when R0 ready

[Hermes Wu]

From: Hermes Wu <Hermes.wu at ite.com.tw>

When starting HDCP authentication, HDCP encryption should be enabled on
the link when R0' is checked.

Change encryption enables time at R0' ready.
Hardware HDCP engine trigger changes repeater fail to restart flow.


Fixes: b5c84a9edcd4 ("drm/bridge: add it6505 driver")
Signed-off-by: Hermes Wu <Hermes.wu at ite.com.tw>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index d2ec3dfc57d6..82986f28f653 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -2091,15 +2091,12 @@ static void it6505_hdcp_wait_ksv_list(struct work_struct *work)
 	ksv_list_check = it6505_hdcp_part2_ksvlist_check(it6505);
 	DRM_DEV_DEBUG_DRIVER(dev, "ksv list ready, ksv list check %s",
 			     ksv_list_check ? "pass" : "fail");
-	if (ksv_list_check) {
-		it6505_set_bits(it6505, REG_HDCP_TRIGGER,
-				HDCP_TRIGGER_KSV_DONE, HDCP_TRIGGER_KSV_DONE);
+
+	if (ksv_list_check)
 		return;
-	}
+
 timeout:
-	it6505_set_bits(it6505, REG_HDCP_TRIGGER,
-			HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL,
-			HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL);
+	it6505_start_hdcp(it6505);
 }
 
 static void it6505_hdcp_work(struct work_struct *work)
@@ -2472,7 +2469,11 @@ static void it6505_irq_hdcp_ksv_check(struct it6505 *it6505)
 {
 	struct device *dev = it6505->dev;
 
-	DRM_DEV_DEBUG_DRIVER(dev, "HDCP event Interrupt");
+	DRM_DEV_DEBUG_DRIVER(dev, "HDCP repeater R0 event Interrupt");
+	/* 1B01 HDCP encription should start when R0 is ready*/
+	it6505_set_bits(it6505, REG_HDCP_TRIGGER,
+			HDCP_TRIGGER_KSV_DONE, HDCP_TRIGGER_KSV_DONE);
+
 	schedule_work(&it6505->hdcp_wait_ksv_list);
 }
 
-- 
2.34.1