linux-kernel - Re: [PATCH v2] dmaengine: apple-admac: Keep upper bits of REG_BUS

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Date:   Fri, 24 Nov 2023 19:03:20 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>,
        Martin Povišer <povik+lin@...ebit.org>
Cc:     Alyssa Rosenzweig <alyssa@...enzweig.io>, asahi@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] dmaengine: apple-admac: Keep upper bits of
 REG_BUS_WIDTH


On Sun, 29 Oct 2023 18:07:04 +0100, Martin Povišer wrote:
> For RX channels, REG_BUS_WIDTH seems to default to a value of 0xf00, and
> macOS preserves the upper bits when setting the configuration in the
> lower ones. If we reset the upper bits to 0, this causes framing errors
> on suspend/resume (the data stream "tears" and channels get swapped
> around). Keeping the upper bits untouched, like the macOS driver does,
> fixes this issue.
> 
> [...]

Applied, thanks!

[1/1] dmaengine: apple-admac: Keep upper bits of REG_BUS_WIDTH
      commit: 306f5df81fcc89b462fbeb9dbe26d9a8ad7c7582

Best regards,
-- 
~Vinod