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Thu, 01 Oct 2026 07:47:57 -0700 (PDT) From: Ruslan Koreev To: Qiling Zhu Cc: Ruslan Koreev , sakari.ailus@linux.intel.com, benjamin.mugnier@foss.st.com, sylvain.petinot@foss.st.com, dan.scally@ideasonboard.com, mchehab@kernel.org, hansg@kernel.org, ilpo.jarvinen@linux.intel.com, gregkh@linuxfoundation.org, linux-media@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, pm@petermarshall.ca Subject: Re: [PATCH 4/4] media: staging/ipu7: Add monochrome pixel formats Date: Thu, 1 Oct 2026 17:47:47 +0300 Message-ID: <20261001144747.1167917-1-koreev.r@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: References: <20260924171820.1179823-1-koreev.r@gmail.com> <20260924171820.1179823-5-koreev.r@gmail.com> <20260929092238.1765758-1-koreev.r@gmail.com> 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 Qiling, On Tue, Sep 29, 2026 at 09:25:39PM +0800, Qiling Zhu wrote: > Since you reported successful plain-V4L2 Y10/Y10P streaming on > next-20260924, could you share the exact media-ctl/v4l2-ctl commands > and any setup performed before STREAMON? I tested on next-20260924 with intel-ipu6 bound to 8086:b05d and v1 patches 1-3, with the vd55g1 changes reworked for v2. Before the plain V4L2 test, I ran the following with libcamera 0.7.2: cam -l timeout 30 cam -c '\_SB_.LNK1' -C5 -s width=804,height=704 That captured five frames at 804x704 R8. Afterwards, media-ctl -p showed Y8_1X8/804x704 on sensor pad 0 and CSI2 pads 0 and 1. The sensor link was enabled and immutable, and this capture link was enabled: "Intel IPU6 CSI2 2":1 -> "Intel IPU6 ISYS Capture 16":0 I did not enable any links manually. I have not repeated this sequence from a fresh boot using only media-ctl and v4l2-ctl, so the prior libcamera setup is relevant to reproducing my test. For each format, I ran these commands first: sudo media-ctl -V '"vd55g1 1-0010":0 [fmt:Y10_1X10/804x704]' sudo media-ctl -V '"Intel IPU6 CSI2 2":0 [fmt:Y10_1X10/804x704]' sudo media-ctl -V '"Intel IPU6 CSI2 2":1 [fmt:Y10_1X10/804x704]' Then, for Y10 (with the trailing space in the FourCC): sudo v4l2-ctl -d /dev/video16 --set-fmt-video \ 'width=804,height=704,pixelformat=Y10 ' sudo v4l2-ctl -d /dev/video16 --get-fmt-video sudo timeout 20 v4l2-ctl -d /dev/video16 --stream-mmap=4 \ --stream-count=5 --stream-to=/tmp/ir-Y10.raw I repeated the three media-ctl commands, then used: sudo v4l2-ctl -d /dev/video16 --set-fmt-video \ 'width=804,height=704,pixelformat=Y10P' sudo v4l2-ctl -d /dev/video16 --get-fmt-video sudo timeout 20 v4l2-ctl -d /dev/video16 --stream-mmap=4 \ --stream-count=5 --stream-to=/tmp/ir-Y10P.raw Both Y10 and Y10P captured five frames successfully and the images looked correct. I have not tested next-20260928, so I cannot yet explain the EPIPE. Could you capture media-ctl -p immediately before STREAMON and any IPU or vd55g1 messages from dmesg after it fails? Ruslan