From: Vikash Garodia <vikash.garodia@oss.qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
Cc: Dikshita Agarwal <dikshita.agarwal@oss.qualcomm.com>,
Abhinav Kumar <abhinav.kumar@linux.dev>,
Bryan O'Donoghue <bod@kernel.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Hans Verkuil <hverkuil@kernel.org>,
Stefan Schmidt <stefan.schmidt@linaro.org>,
Stanimir Varbanov <stanimir.varbanov@linaro.org>,
linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH 2/2] media: venus: Fix iova allocation from restrict region
Date: Tue, 18 Aug 2026 13:25:58 +0530 [thread overview]
Message-ID: <8a9b417f-11cf-4dd8-af3f-494afa38b868@oss.qualcomm.com> (raw)
In-Reply-To: <hzu33hharafxhfdnr5tr23ti2tmtjhls3iwbvmtfllwcv232m5@nvxemt5ijf4n>
On 8/18/2026 12:34 PM, Dmitry Baryshkov wrote:
> On Wed, Aug 12, 2026 at 04:25:59PM +0530, Vishnu Reddy wrote:
>> The VPU issues DMA through several SMMU streams, and the hardware does
>> not give every stream the same addressable range. The non-pixel stream
>> cannot address the low 600MB of IOVA space, while the pixel stream can
>> address the full range:
>> +-----------------------------------------------------------+
>> | non-pixel stream addressable range (600 MB - 3.5 GB) |
>> | 0x25800000 - 0xe0000000 |
>> +-----------------------------------------------------------+
>> | pixel stream addressable range (0 - 3.5 GB) |
>> | 0x00000000 - 0xe0000000 |
>> +-----------------------------------------------------------+
> Does this split apply to all generations of Venus? We support MSM8916,
> for example. There has been work to enable MSM8974.
Yes, applicable for all VPUs
Regards,
Vikash
next prev parent reply other threads:[~2026-08-18 7:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-12 10:55 [PATCH 0/2] media: qcom: Fix iova allocation from restrict region Vishnu Reddy
2026-08-12 10:55 ` [PATCH 1/2] media: iris: " Vishnu Reddy
2026-08-14 14:41 ` Vikash Garodia
2026-08-18 6:49 ` Dmitry Baryshkov
2026-08-18 10:19 ` Bryan O'Donoghue
2026-08-12 10:55 ` [PATCH 2/2] media: venus: " Vishnu Reddy
2026-08-14 14:41 ` Vikash Garodia
2026-08-18 7:04 ` Dmitry Baryshkov
2026-08-18 7:55 ` Vikash Garodia [this message]
2026-08-18 8:20 ` Dmitry Baryshkov
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