Commit 2adaec46 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Andy Shevchenko
Browse files

platform/x86: ISST: Increase timeout 



Fix timeout issue on some Ice Lake servers, where mail box command is
timing out before the response,

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent f441d66a

drivers/platform/x86/intel_speed_select_if/isst_if_mbox_pci.c

+5 −6
Original line number Diff line number Diff line
@@ -21,13 +21,12 @@ 
#define PUNIT_MAILBOX_BUSY_BIT		31



/*

 * Commands has variable amount of processing time. Most of the commands will

 * be done in 0-3 tries, but some takes up to 50.

 * The real processing time was observed as 25us for the most of the commands

 * at 2GHz. It is possible to optimize this count taking samples on customer

 * systems.

 * The average time to complete some commands is about 40us. The current

 * count is enough to satisfy 40us. But when the firmware is very busy, this

 * causes timeout occasionally.  So increase to deal with some worst case

 * scenarios. Most of the command still complete in few us.

 */

#define OS_MAILBOX_RETRY_COUNT		50

#define OS_MAILBOX_RETRY_COUNT		100



struct isst_if_device {

	struct mutex mutex;