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Tue, 29 Sep 2026 06:26:06 -0700 (PDT) Date: Tue, 29 Sep 2026 21:25:39 +0800 From: Qiling Zhu To: Ruslan Koreev Cc: 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 Message-ID: References: <20260929092238.1765758-1-koreev.r@gmail.com> Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260929092238.1765758-1-koreev.r@gmail.com> Hi Ruslan, On Tue, Sep 29, 2026 at 12:22:38PM +0300, Ruslan Koreev wrote: > I wasn't aware the ipu6 driver had grown IPU7 support, my base was > 7.3-rc5. Tested now on next-20260924 with the ipu6 driver and patches > 1-3, the vd55g1 one reworked as you suggested: the sensor probes, > ipu-bridge connects both cameras, libcamera streams Y8 804x704 at 58 fps > from the VD55G1, and Y10 and Y10P stream with plain V4L2. So this patch > is not needed there; I'll drop it in v2. > > Ruslan I tested patches 1-3 from v1 on another ThinkPad X1 Carbon Gen 14 (21V8A028CD, Panther Lake, IPU7 PCI 8086:b05d) using the ipu6 driver on next-20260928. I did not apply patch 4. Patches 1-3 applied cleanly without local changes. The VD55G1 probes successfully, TBE20A1 is discovered by ipu-bridge, and the media topology is established as: vd55g1 1-0010 -> Intel IPU6 CSI2 2 -> Intel IPU6 ISYS Capture 16 -> /dev/video16 The sensor reports Y10_1X10/804x704, and /dev/video16 enumerates GREY, Y10 and Y10P. Setting Y10 at 804x704 succeeds with: Bytes per Line : 1664 Size Image : 1173120 However, VIDIOC_STREAMON returns EPIPE for Y10, Y10P and GREY, and no frames are captured. 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'd like to reproduce the same sequence before looking for differences between the two linux-next snapshots. My test base before applying the series was: 6375e61c01e93e35ee7acd336a689ac1fae4b509 (next-20260928) Hardware: ThinkPad X1 Carbon Gen 14, 21V8A028CD Kernel: 7.3.0-rc5-next-20260928-x1c14ir Thanks, Qiling Zhu