linux-kernel - Re: [PATCH] fpga: altera-cvp: Increase credit timeout

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Message-ID: <Z8LXIOjrnmBTrQKs@yilunxu-OptiPlex-7050>
Date: Sat, 1 Mar 2025 17:45:04 +0800
From: Xu Yilun <yilun.xu@...ux.intel.com>
To: tien.sung.ang@...el.com
Cc: Moritz Fischer <mdf@...nel.org>, Wu Hao <hao.wu@...el.com>,
	Xu Yilun <yilun.xu@...el.com>, Tom Rix <trix@...hat.com>,
	linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
	kuhanh.murugasen.krishnan@...el.com,
	kuhanh.murugasen.krishnan@...era.com
Subject: Re: [PATCH] fpga: altera-cvp: Increase credit timeout

On Thu, Feb 13, 2025 at 06:12:49AM +0800, tien.sung.ang@...el.com wrote:
> From: Kuhanh Murugasen Krishnan <kuhanh.murugasen.krishnan@...el.com>
> 
> 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@...el.com>
> Signed-off-by: Kuhanh Murugasen Krishnan <kuhanh.murugasen.krishnan@...el.com>

Acked-by: Xu Yilun <yilun.xu@...el.com>

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