From: Sergey Lebedev <lsa.uz@pm.me>
To: Benjamin Mugnier <benjamin.mugnier@foss.st.com>,
George Neacsu <geocausa@gmail.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>,
Sylvain Petinot <sylvain.petinot@foss.st.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Dan Scally <dan.scally@ideasonboard.com>,
Hans de Goede <hansg@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Peter Marshall <pm@petermarshall.ca>, Hao Yao <hao.yao@intel.com>,
linux-media@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/4] media: i2c: Add ST VD55G0 global shutter sensor driver
Date: Tue, 20 Oct 2026 14:26:49 +0000 [thread overview]
Message-ID: <20261020142641.24808-1-lsa.uz@pm.me> (raw)
In-Reply-To: <de8c6003-c7b5-40f0-beab-4c3370b98f09@foss.st.com>
Hi Benjamin,
On 20/10/2026 14:25, Benjamin Mugnier wrote:
> I guess there could be an issue on the receiver side ? Maybe your
> receiver is ignoring data types and completes the frame with ISL data,
> effectively filling up the DMA ?
Not on the Intel model: IPU7 drops them, as you expect. With 0x0329 at
1, the test-pattern frames match those at 0 with no shift, and the top
rows hold image data, not the embedded lines.
On the Snapdragon model it runs the other way: George's stream stops
with the status lines off and runs with them on, and on 16/10 his
vd55g1 build streamed with them off. So I agree the register itself
should not matter there; something else in v1 probably does, and George
can narrow it down on CAMSS better than I can. v2 leaves the register at
its default, which changes nothing on IPU7.
Sergey
next prev parent reply other threads:[~2026-10-20 14:26 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-19 16:27 [PATCH 0/4] media: Add the ST VD55G0 global shutter sensor Sergey Lebedev
2026-10-19 16:27 ` [PATCH 1/4] dt-bindings: media: i2c: Add ST VD55G0 camera sensor Sergey Lebedev
2026-10-20 8:27 ` Krzysztof Kozlowski
2026-10-20 9:08 ` Sergey Lebedev
2026-10-19 16:27 ` [PATCH 2/4] media: i2c: Add ST VD55G0 global shutter sensor driver Sergey Lebedev
2026-10-19 18:24 ` George Neacsu
2026-10-19 19:34 ` Sergey Lebedev
2026-10-20 6:44 ` George Neacsu
2026-10-20 8:52 ` Sergey Lebedev
2026-10-20 12:25 ` Benjamin Mugnier
2026-10-20 14:26 ` Sergey Lebedev [this message]
2026-10-20 18:10 ` George Neacsu
2026-10-20 18:14 ` Sergey Lebedev
2026-10-19 16:28 ` [PATCH 3/4] media: ipu-bridge: Add ST VD55G0 Sergey Lebedev
2026-10-19 16:28 ` [PATCH 4/4] media: ipu-bridge: Add the Surface Pro 11 infrared illuminator Sergey Lebedev
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