From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Longerbeam Subject: Re: [PATCH v6 00/39] i.MX Media Driver Date: Thu, 30 Mar 2017 09:12:29 -0700 Message-ID: References: <1490661656-10318-1-git-send-email-steve_longerbeam@mentor.com> <20170330110249.GF7909@n2100.armlinux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20170330110249.GF7909@n2100.armlinux.org.uk> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: Russell King - ARM Linux Cc: mark.rutland@arm.com, andrew-ct.chen@mediatek.com, minghsiu.tsai@mediatek.com, sakari.ailus@linux.intel.com, nick@shmanahar.org, songjun.wu@microchip.com, hverkuil@xs4all.nl, Steve Longerbeam , pavel@ucw.cz, robert.jarzmik@free.fr, devel@driverdev.osuosl.org, markus.heiser@darmarIT.de, laurent.pinchart+renesas@ideasonboard.com, shuah@kernel.org, geert@linux-m68k.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, kernel@pengutronix.de, arnd@arndb.de, mchehab@kernel.org, bparrot@ti.com, robh+dt@kernel.org, horms+renesas@verge.net.au, tiffany.lin@mediatek.com, linux-arm-kernel@lists.infradead.org, niklas.soderlund+renesas@ragnatech.se, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, jean-christophe.trotin@st.com, p.zabel@pengutronix.de, fabio.estevam@nxp.com, shawnguo@kernel.org, sudipm.mukherjee@gmail.com List-Id: devicetree@vger.kernel.org On 03/30/2017 04:02 AM, Russell King - ARM Linux wrote: > This fails at step 1. The removal of the frame interval support now > means my setup script fails when trying to set the frame interval on > the camera: > > Enumerating pads and links > Setting up format SRGGB8_1X8 816x616 on pad imx219 0-0010/0 > Format set: SRGGB8_1X8 816x616 > Setting up frame interval 1/25 on pad imx219 0-0010/0 > Frame interval set: 1/25 > Setting up format SRGGB8_1X8 816x616 on pad imx6-mipi-csi2/0 > Format set: SRGGB8_1X8 816x616 > Setting up frame interval 1/25 on pad imx6-mipi-csi2/0 > Unable to set frame interval: Inappropriate ioctl for device (-25)Unable to setup formats: Inappropriate ioctl for device (25) > > This is because media-ctl tries to propagate it from the imx219 source > pad to the csi2 sink pad, and the csi2 now fails that ioctl. I assume you're using Philipp's frame interval patches to media-ctl. Can you make the frame interval propagation optional in those patches? I.e. don't error-out with a failure code if the ioctl returns ENOTTY. Steve > > This makes media-ctl return a failure code, which means that it's not > possible for a script to determine whether the failure was due to the > camera setup or something else. So, we have to assume that the > whole command failed. > > This is completely broken, and I'm even more convinced that those > arguing for this behaviour really have not thought it through well > enough before demanding that this code was removed. > > As far as I'm concerned, the end result is completely broken and > unusable. I'm going to be merging the frame interval support back > into my test tree, because that's the only sane thing to do. > > If v4l2 people want to object to having frame interval support present > for all subdevs, then _they_ need to make sure that the rest of their > software conforms to what they're telling people to do. >