linux-kernel - [PATCH] platform/x86: intel_scu_ipc: Increase virtual timeout from 3 to 5 seconds

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Date:   Wed, 10 Feb 2021 11:20:41 -0800
From:   Casey Bowman <casey.g.bowman@...el.com>
To:     mika.westerberg@...ux.intel.com
Cc:     dvhart@...radead.org, andy@...radead.org, azhar.shaikh@...el.com,
        casey.g.bowman@...el.com, lee.jones@...aro.org,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        heikki.krogerus@...ux.intel.com
Subject: [PATCH] platform/x86: intel_scu_ipc: Increase virtual timeout from 3 to 5 seconds

Increasing the virtual timeout time to account for scenarios
that may require more time, like DisplayPort Multi-Stream Transport
(DP MST), where the disconnect time can be extended longer than
usual.

The recommended timeout range is 5-10 seconds, of which
we will take the lower bound.

Signed-off-by: Casey Bowman <casey.g.bowman@...el.com>
Acked-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
---
 drivers/platform/x86/intel_scu_ipc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index d9cf7f7602b0..9171a46a9e3f 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -75,7 +75,7 @@ struct intel_scu_ipc_dev {
 #define IPC_READ_BUFFER		0x90
 
 /* Timeout in jiffies */
-#define IPC_TIMEOUT		(3 * HZ)
+#define IPC_TIMEOUT		(5 * HZ)
 
 static struct intel_scu_ipc_dev *ipcdev; /* Only one for now */
 static DEFINE_MUTEX(ipclock); /* lock used to prevent multiple call to SCU */
-- 
2.17.1