linux-kernel - [PATCH] platform/x86/intel/sdsi: Change mailbox timeout

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Date:   Wed, 12 Apr 2023 18:32:30 -0700
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     david.e.box@...ux.intel.com, hdegoede@...hat.com,
        markgross@...nel.org
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] platform/x86/intel/sdsi: Change mailbox timeout

On some platforms, it may take up to 400ms for the ready bit to be set in a
successful mailbox transaction. Set the timeout to 500ms to cover the worst
case.

Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
---
 drivers/platform/x86/intel/sdsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel/sdsi.c b/drivers/platform/x86/intel/sdsi.c
index 9e0ea2cdd704..556e7c6dbb05 100644
--- a/drivers/platform/x86/intel/sdsi.c
+++ b/drivers/platform/x86/intel/sdsi.c
@@ -49,7 +49,7 @@
 #define SDSI_MBOX_CMD_SUCCESS		0x40
 #define SDSI_MBOX_CMD_TIMEOUT		0x80
 
-#define MBOX_TIMEOUT_US			2000
+#define MBOX_TIMEOUT_US			500000
 #define MBOX_TIMEOUT_ACQUIRE_US		1000
 #define MBOX_POLLING_PERIOD_US		100
 #define MBOX_ACQUIRE_NUM_RETRIES	5

base-commit: 5b309e80f457ebb41770e0122766825a78cfc11b
-- 
2.34.1