Hi Daniel, On 16.10.2017 18:01, Daniel Mack wrote: > Hi, > > On 28.08.2017 09:10, Todor Tomov wrote: >> On 25.08.2017 17:10, Daniel Mack wrote: >>> Could you explain how ISPIF, CSID and CSIPHY are related? >>> >>> I have a userspace test setup that works fine for USB webcams, but when >>> operating on any of the video devices exposed by this driver, the >>> lowlevel functions such as .s_power of the ISPIF, CSID, CSIPHY and the >>> sensor driver layers aren't called into. >> >> Have you activated the media controller links? The s_power is called >> when the subdev is part of a pipeline in which the video device node >> is opened. You can see example configurations for the Qualcomm CAMSS >> driver on: >> https://github.com/96boards/documentation/blob/master/ConsumerEdition/DragonBoard-410c/Guides/CameraModule.md >> This will probably answer most of your questions. > > It did in fact, yes. Thanks again for the pointer. > > I am however struggling getting a 4-lane OV13855 camera to work with > this camss driver, and I'd be happy to hear about similar setups that work. > > In short, here's what my setup looks like: > > 1. I wrote a driver for the OV13855 sensor, based on the one for OV13858 > but with updated register values. It announces > MEDIA_BUS_FMT_SBGGR10_1X10 as bus format which is what the sensor should > be sending, if I understand the specs correctly. > > > 2. The DTS snippet for the endpoint connection look like this: > > &blsp_i2c6 { > cam0: ov13855@16 { > /* ... */ > port { > cam0_ep: endpoint { > clock-lanes = <1>; > data-lanes = <0 2 3 4>; > remote-endpoint = <&csiphy0_ep>; > }; > }; > }; > }; > > &camss { > ports { > port@0 { > reg = <0>; > csiphy0_ep: endpoint { > clock-lanes = <1>; > data-lanes = <0 2 3 4>; > remote-endpoint = <&cam0_ep>; > }; > }; > }; > }; > > There are also no lane swaps or any intermediate components in hardware. > We've checked the electrical bits many times, and that end seems alright. > > > 3. The pads and links are set up like this: > > # media-ctl -d /dev/media0 -l > '"msm_csiphy0":1->"msm_csid0":0[1],"msm_csid0":1->"msm_ispif0":0[1],"msm_ispif0":1->"msm_vfe0_rdi0":0[1]' > > # media-ctl -d /dev/media0 -V '"ov13855 > 1-0010":0[fmt:SBGGR10_1X10/4224x3136 > field:none],"msm_csiphy0":0[fmt:SBGGR10_1X10/4224x3136 > field:none],"msm_csid0":0[fmt:SBGGR10_1X10/4224x3136 > field:none],"msm_ispif0":0[fmt:SBGGR10_1X10/4224x3136 > field:none],"msm_vfe0_rdi0":0[fmt:SBGGR10_1X10/4224x3136 field:none]' > > Both commands succeed. > > > 4. When streaming is started, the power consumption of the device goes > up, all necessary external clocks and voltages are provided and are > stable, and I can see a continuous stream of data on all 4 MIPI lanes > using an oscilloscope. > > > 5. Capturing frames with the following yavta command doesn't work > though. The task is mostly stuck in the buffer dequeing ioctl: > > # yavta -B capture-mplane -c10 -I -n 5 -f SBGGR10P -s 4224x3136 /dev/video0 > > vfe_isr() does fire sometimes with VFE_0_IRQ_STATUS_1_RDIn_SOF(0) set, > but very occasionally only, and the frames do not contain data. > > FWIW, an ov6540 is connected to port 1 of the camss, and this sensor > works fine. > > I'd be grateful for any pointer about what I could investigate on. >
Everything that you have described seems correct. As you say that frames do not contain any data, do VFE_0_IRQ_STATUS_0_IMAGE_MASTER_n_PING_PONG fire at all or not? Do you see any interrupts on the ISPIF? Which? Could you please share what hardware setup you have - mezzanine and camera module. -- Best regards, Todor Tomov
