From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>,
Bryan O'Donoghue <bod@kernel.org>,
Vikash Garodia <vikash.garodia@oss.qualcomm.com>,
Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>,
Abhinav Kumar <abhinav.kumar@linux.dev>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Stefan Schmidt <stefan.schmidt@linaro.org>,
Hans Verkuil <hverkuil@kernel.org>
Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
iommu@lists.linux.dev, stable@vger.kernel.org
Subject: Re: [PATCH 06/11] media: iris: Fix VM count passed to firmware
Date: Tue, 14 Apr 2026 11:29:40 +0200 [thread overview]
Message-ID: <fe1e2ef2-dece-4864-a89b-a311b3ddbfcc@oss.qualcomm.com> (raw)
In-Reply-To: <20260414-glymur-v1-6-7d3d1cf57b16@oss.qualcomm.com>
On 4/14/26 7:00 AM, Vishnu Reddy wrote:
> On Glymur, firmware interprets the value written to CPU_CS_SCIACMDARG3 as
> the number of virtual machines (VMs) and internally adds 1 to it. Writing
> 1 causes firmware to treat it as 2 VMs. Since only one VM is required,
> remove this write to leave the register at its reset value of 0. This does
> not affect other platforms as only Glymur firmware uses this register,
> earlier platform firmwares ignore it.
Should we write a zero there, then?
Konrad
next prev parent reply other threads:[~2026-04-14 9:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-14 4:59 [PATCH 00/11] media: iris: Add support for glymur platform Vishnu Reddy
2026-04-14 5:00 ` [PATCH 06/11] media: iris: Fix VM count passed to firmware Vishnu Reddy
2026-04-14 6:33 ` Mukesh Ojha
2026-04-17 15:28 ` Vishnu Reddy
2026-04-14 9:29 ` Konrad Dybcio [this message]
2026-04-17 14:35 ` Vishnu Reddy
2026-04-14 15:20 ` Dmitry Baryshkov
2026-04-17 15:29 ` Vishnu Reddy
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