From: Kuhanh Murugasen Krishnan kuhanh.murugasen.krishnan@intel.com
[ Upstream commit 0f05886a40fdc55016ba4d9ae0a9c41f8312f15b ]
Increase the timeout for SDM (Secure device manager) data credits from 20ms to 40ms. Internal stress tests running at 500 loops failed with the current timeout of 20ms. At the start of a FPGA configuration, the CVP host driver reads the transmit credits from SDM. It then sends bitstream FPGA data to SDM based on the total credits. Each credit allows the CVP host driver to send 4kBytes of data. There are situations whereby, the SDM did not respond in time during testing.
Signed-off-by: Ang Tien Sung tien.sung.ang@intel.com Signed-off-by: Kuhanh Murugasen Krishnan kuhanh.murugasen.krishnan@intel.com Acked-by: Xu Yilun yilun.xu@intel.com Link: https://lore.kernel.org/r/20250212221249.2715929-1-tien.sung.ang@intel.com Signed-off-by: Xu Yilun yilun.xu@linux.intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/fpga/altera-cvp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c index 4e0edb60bfba6..d107ad73a188c 100644 --- a/drivers/fpga/altera-cvp.c +++ b/drivers/fpga/altera-cvp.c @@ -52,7 +52,7 @@ /* V2 Defines */ #define VSE_CVP_TX_CREDITS 0x49 /* 8bit */
-#define V2_CREDIT_TIMEOUT_US 20000 +#define V2_CREDIT_TIMEOUT_US 40000 #define V2_CHECK_CREDIT_US 10 #define V2_POLL_TIMEOUT_US 1000000 #define V2_USER_TIMEOUT_US 500000