linux-kernel - [PATCH v4 10/11] drm/bridge: it6505: fix HDCP CTS ksv wait timer

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Message-ID: <20240926075134.22394-1-Hermes.Wu@ite.com.tw>
Date: Thu, 26 Sep 2024 15:51:33 +0800
From: Hermes Wu <Hermes.Wu@....com.tw>
To: hermes wu <Hermes.wu@....com.tw>
CC: Kenneth Hung <Kenneth.hung@....com.tw>,
        Andrzej Hajda
	<andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert
 Foss <rfoss@...nel.org>,
        Laurent Pinchart
	<Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej
 Skrabec <jernej.skrabec@...il.com>,
        Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
        AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>,
        Hermes Wu <hermes.wu@....com.tw>, Allen Chen <allen.chen@....com.tw>,
        "open list:DRM DRIVERS"
	<dri-devel@...ts.freedesktop.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH v4 10/11] drm/bridge: it6505: fix HDCP CTS ksv wait timer

From: Hermes Wu <Hermes.wu@....com.tw>

When running the HDCP CTS test on UNIGRAF DPR-100.
HDCP must disabled after waiting KSV for 5s.
Consider system ksv work schedules. The original timer has a chance to expire.

Fixes: b5c84a9edcd4 ("drm/bridge: add it6505 driver")
Signed-off-by: Hermes Wu <Hermes.wu@....com.tw>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index e75bc1575aa8..22d9bec3faea 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -2093,7 +2093,8 @@ static void it6505_hdcp_wait_ksv_list(struct work_struct *work)
 	struct it6505 *it6505 = container_of(work, struct it6505,
 					     hdcp_wait_ksv_list);
 	struct device *dev = it6505->dev;
-	unsigned int timeout = 5000;
+	/* 1B-04 fail, wait to long to Stop encription(5s->3s). */
+	unsigned int timeout = 3000;
 	u8 bstatus = 0;
 	bool ksv_list_check;
 
-- 
2.34.1