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[80.193.62.245]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48dfd4c4fc4sm3698139f8f.15.2026.10.16.03.27.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Oct 2026 03:27:10 -0700 (PDT) From: George Neacsu To: Sergey Lebedev Cc: Benjamin Mugnier , Peter Marshall , Sylvain Petinot , Jizhou Tong , Sakari Ailus , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] media: i2c: vd55g1: fix VD55G0 streaming below 900 Mbps Date: Fri, 16 Oct 2026 11:27:09 +0100 Message-ID: <20261016102709.30467-1-geocausa@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261016070158.43624-1-lsa.uz@pm.me> References: <20261016-vd55g0-sp11-fix-v1-1-eb14bd80d8f8@gmail.com> <20261016070158.43624-1-lsa.uz@pm.me> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Sergey, On 16/10/2026 08:02, Sergey Lebedev wrote: > So here, writing 0 there does not stop the output by itself. vd55g1 > writes it at every stream start instead, which may be the difference. Thanks, you are right, and it is not the place either. I retested on the Snapdragon model with the line length change applied and 0x0329 handled three ways: ISL_ENABLE = 0 at every stream start (as in Peter's v2) 6/6 captures ISL_ENABLE = 0 once per power-on, after boot 2/2 never written 2/2 All at 840 Mbps on one lane, 644x604 Y10, with real images in every run, including a stream-start write on the first capture after loading the module. 0x0329 reads 0x01 after power-on here too and 0x00 once written. The failure I based the ISL change on came from a debug build where the line length was forced by a register write just before stream start rather than coming from the driver, so it was not a clean test. I will send a v2 with only the line length change. Thanks, George