From: Varadarajan Narayanan <varadarajan.narayanan@oss.qualcomm.com>
To: Vinod Koul <vkoul@kernel.org>
Cc: Frank Li <Frank.Li@kernel.org>,
Abhishek Sahu <absahu@codeaurora.org>,
mani@kernel.org, linux-arm-msm@vger.kernel.org,
dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
Md Sadre Alam <md.alam@oss.qualcomm.com>,
lakshmi.d@oss.qualcomm.com
Subject: Re: [PATCH v5] dma: qcom: bam_dma: Fix command element mask field for BAM v1.6.0+
Date: Thu, 4 Jun 2026 16:15:16 +0530 [thread overview]
Message-ID: <aiFXPPXtjCHj0Ged@hu-varada-blr.qualcomm.com> (raw)
In-Reply-To: <agyeh4PZwG0Mu6Wx@vaman>
On Tue, May 19, 2026 at 11:01:51PM +0530, Vinod Koul wrote:
> On 14-05-26, 12:09, Varadarajan Narayanan wrote:
> > From: Md Sadre Alam <md.alam@oss.qualcomm.com>
> >
> > BAM version 1.6.0 and later changed the behavior of the mask field in
> > command elements for read operations. In newer BAM versions, the mask
> > field for read commands contains the upper 4 bits of the destination
> > address to support 36-bit addressing, while for write commands it
> > continues to function as a traditional write mask.
>
> But this changes behaviour for all versions. What happens to folks on older
> versions, wont this break for them, if not what am I missing
Md Alam,
Can you please respond to Vinod's query.
-Varada
[ . . . ]
next prev parent reply other threads:[~2026-06-04 10:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-14 6:39 [PATCH v5] dma: qcom: bam_dma: Fix command element mask field for BAM v1.6.0+ Varadarajan Narayanan
2026-05-19 17:31 ` Vinod Koul
2026-06-04 10:45 ` Varadarajan Narayanan [this message]
2026-06-08 5:50 ` Md Sadre Alam
2026-06-08 6:03 ` Dmitry Baryshkov
2026-06-09 10:34 ` Md Sadre Alam
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