From: Vinod Koul <vkoul@kernel.org>
To: Baolin Wang <baolin.wang@linaro.org>
Cc: orsonzhai@gmail.com, zhang.lyra@gmail.com,
dan.j.williams@intel.com, linux-kernel@vger.kernel.org,
dmaengine@vger.kernel.org, eric.long@unisoc.com,
zhenfang.wang@unisoc.com
Subject: Re: [PATCH] dmaengine: sprd: Fix the link-list pointer register configuration issue
Date: Mon, 14 Oct 2019 10:33:13 +0530 [thread overview]
Message-ID: <20191014050313.GG27950@vkoul-mobl> (raw)
In-Reply-To: <eadfe9295499efa003e1c344e67e2890f9d1d780.1568267061.git.baolin.wang@linaro.org>
On 12-09-19, 13:47, Baolin Wang wrote:
> From: Zhenfang Wang <zhenfang.wang@unisoc.com>
>
> We will set the link-list pointer register point to next link-list
> configuration's physical address, which can load DMA configuration
> from the link-list node automatically.
>
> But the link-list node's physical address can be larger than 32bits,
> and now Spreadtrum DMA driver only supports 32bits physical address,
> which may cause loading a incorrect DMA configuration when starting
> the link-list transfer mode. According to the DMA datasheet, we can
> use SRC_BLK_STEP register (bit28 - bit31) to save the high bits of the
> link-list node's physical address to fix this issue.
Applied, thanks
--
~Vinod
prev parent reply other threads:[~2019-10-14 5:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-12 5:47 [PATCH] dmaengine: sprd: Fix the link-list pointer register configuration issue Baolin Wang
2019-10-14 5:03 ` Vinod Koul [this message]
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