From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailout-de.gmx.net ([213.165.64.23]:56341 "HELO mailout-de.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753530Ab2KGLWR (ORCPT ); Wed, 7 Nov 2012 06:22:17 -0500 Message-ID: <509A4473.3080506@gmx.net> Date: Wed, 07 Nov 2012 12:22:27 +0100 From: Andreas Nagel MIME-Version: 1.0 To: Sakari Ailus CC: linux-media@vger.kernel.org, laurent.pinchart@ideasonboard.com Subject: Re: OMAP3 ISP: VIDIOC_STREAMON and VIDIOC_QBUF calls fail References: <5097DF9F.6080603@gmx.net> <20121106215153.GE25623@valkosipuli.retiisi.org.uk> In-Reply-To: <20121106215153.GE25623@valkosipuli.retiisi.org.uk> Content-Type: multipart/mixed; boundary="------------040602080308000605060306" Sender: linux-media-owner@vger.kernel.org List-ID: This is a multi-part message in MIME format. --------------040602080308000605060306 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Sakari, thanks for helping. > My code sets up the ISP pipeline, configures the format on all the > subdevices pads and the actual video device. Works fine so far. > Then I passed user pointers (aquired with malloc) to the device > driver for the capture buffers. Before issuing VIDIOC_STREAMON, I > enqueue my buffers with VIDIOC_QBUF, which fails with errno = EIO. I > don't know, why this is happening or where to got from here. >> One possibility could be that mapping the buffer to ISP MMU fails for >> a reason or another. Do you set the length field in the buffer? Yes, the length was set when using userptr. >> >> And am I missing something else? > The formats on the pads at different ends of the links in the pipeline must > match. In most cases, they have to be exactly the same. > > Have you used the media-ctl test program here? > > > > media-ctl -p gives you (and us) lots of information that helps figuring out > what could go wrong here. All pads do indeed have the same format. I ran media-ctl, as you suggested. You can see the topology in the attached textfile. Kind regards, Andreas --------------040602080308000605060306 Content-Type: text/plain; charset=UTF-8; name="topology.txt" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="topology.txt" Opening media device /dev/media0 Enumerating entities Found 16 entities Enumerating pads and links Media controller API version 0.0.0 Media device information ------------------------ driver omap3isp model TI OMAP3 ISP serial bus info hw revision 0x0 driver version 0.0.0 Device topology - entity 1: OMAP3 ISP CCP2 (2 pads, 2 links) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev0 pad0: Sink <- "OMAP3 ISP CCP2 input":0 [] pad1: Source -> "OMAP3 ISP CCDC":0 [] - entity 2: OMAP3 ISP CCP2 input (1 pad, 1 link) type Node subtype V4L device node name /dev/video0 pad0: Source -> "OMAP3 ISP CCP2":0 [] - entity 3: OMAP3 ISP CSI2a (2 pads, 2 links) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev1 pad0: Sink pad1: Source -> "OMAP3 ISP CSI2a output":0 [] -> "OMAP3 ISP CCDC":0 [] - entity 4: OMAP3 ISP CSI2a output (1 pad, 1 link) type Node subtype V4L device node name /dev/video1 pad0: Sink <- "OMAP3 ISP CSI2a":1 [] - entity 5: OMAP3 ISP CCDC (3 pads, 9 links) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev2 pad0: Sink <- "OMAP3 ISP CCP2":1 [] <- "OMAP3 ISP CSI2a":1 [] <- "tvp514x 2-005d":0 [] pad1: Source -> "OMAP3 ISP CCDC output":0 [] -> "OMAP3 ISP resizer":0 [] pad2: Source -> "OMAP3 ISP preview":0 [] -> "OMAP3 ISP AEWB":0 [ENABLED,IMMUTABLE] -> "OMAP3 ISP AF":0 [ENABLED,IMMUTABLE] -> "OMAP3 ISP histogram":0 [ENABLED,IMMUTABLE] - entity 6: OMAP3 ISP CCDC output (1 pad, 1 link) type Node subtype V4L device node name /dev/video2 pad0: Sink <- "OMAP3 ISP CCDC":1 [] - entity 7: OMAP3 ISP preview (2 pads, 4 links) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev3 pad0: Sink <- "OMAP3 ISP CCDC":2 [] <- "OMAP3 ISP preview input":0 [] pad1: Source -> "OMAP3 ISP preview output":0 [] -> "OMAP3 ISP resizer":0 [] - entity 8: OMAP3 ISP preview input (1 pad, 1 link) type Node subtype V4L device node name /dev/video3 pad0: Source -> "OMAP3 ISP preview":0 [] - entity 9: OMAP3 ISP preview output (1 pad, 1 link) type Node subtype V4L device node name /dev/video4 pad0: Sink <- "OMAP3 ISP preview":1 [] - entity 10: OMAP3 ISP resizer (2 pads, 4 links) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev4 pad0: Sink <- "OMAP3 ISP CCDC":1 [] <- "OMAP3 ISP preview":1 [] <- "OMAP3 ISP resizer input":0 [] pad1: Source -> "OMAP3 ISP resizer output":0 [] - entity 11: OMAP3 ISP resizer input (1 pad, 1 link) type Node subtype V4L device node name /dev/video5 pad0: Source -> "OMAP3 ISP resizer":0 [] - entity 12: OMAP3 ISP resizer output (1 pad, 1 link) type Node subtype V4L device node name /dev/video6 pad0: Sink <- "OMAP3 ISP resizer":1 [] - entity 13: OMAP3 ISP AEWB (1 pad, 1 link) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev5 pad0: Sink <- "OMAP3 ISP CCDC":2 [ENABLED,IMMUTABLE] - entity 14: OMAP3 ISP AF (1 pad, 1 link) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev6 pad0: Sink <- "OMAP3 ISP CCDC":2 [ENABLED,IMMUTABLE] - entity 15: OMAP3 ISP histogram (1 pad, 1 link) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev7 pad0: Sink <- "OMAP3 ISP CCDC":2 [ENABLED,IMMUTABLE] - entity 17: tvp514x 2-005d (1 pad, 1 link) type V4L2 subdev subtype Unknown device node name /dev/v4l-subdev8 pad0: Source -> "OMAP3 ISP CCDC":0 [] --------------040602080308000605060306--