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Mon, 31 Aug 2026 06:37:07 -0700 (PDT) Message-ID: Date: Mon, 31 Aug 2026 16:37:05 +0300 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v15 00/22] media: i2c: add Maxim GMSL2/3 serializer and deserializer drivers To: Sakari Ailus , Tomi Valkeinen Cc: dumitru.ceclan@analog.com, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-staging@lists.linux.dev, linux-gpio@vger.kernel.org, =?UTF-8?Q?Niklas_S=C3=B6derlund?= , Martin Hecht , Andrian Suciu , Cosmin Tanislav , Vivekananda Dayananda , Cory Keitz , Mauro Carvalho Chehab , Laurent Pinchart , Julien Massot , Rob Herring , =?UTF-8?Q?Niklas_S=C3=B6derlund?= , Greg Kroah-Hartman References: <20260807-gmsl2-3_serdes-v15-0-7212e9e5156a@analog.com> Content-Language: en-US From: Ceclan Dumitru In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 8/27/26 11:45 AM, Sakari Ailus wrote: > Hei Tomi, > > On Wed, Aug 26, 2026 at 01:15:03PM +0300, Tomi Valkeinen wrote: >> Hi, >> >> On 07/08/2026 16:02, Dumitru Ceclan via B4 Relay wrote: [...] >> The deserializer TPG gives me no frames at all. I recall the clocking for >> the TPG was quite a challenge on at least some max96 serializers, so maybe >> it's related to that. >> >> The serializer TPG worked, although I think there's something funny with it: >> the initial frames (maybe just the first one) seem to be truncated a bit, >> there's black at the bottom. Another, a bit more unclear, is that sometimes >> ser tpg stops working. If I'm not mistaken, what I did was run cam0-tpg + >> cam1-tpg. Then I tried des tpg. Then cam0-tpg, but it gives me nothing. >> Streaming with cam0+cam1 video "resets" things and it all works again. I've >> seen this a few times, but there seems to be some randomness so I haven't >> been able to pinpoint it, but feels like there's some extra state that's >> left behind into the HW. >> >> All in all, the normal case (non-tpg) works ok for me: > > I'd indeed either fix the TPG before merging the set or postpone adding it > for this reason. :-) > With V16 TPG deserializer and first frame serializer issues were addressed. Also, we could not replicate ser_tpg not working with this revision. Thanks, Dumitru