Re: Re: Re: hooking Sony 47MPixel sensor to NXP imx8m-mini MIPI CSI2

[Petko Manolov <petko.manolov@konsulko.com>]

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On 22-07-06 08:18:20, Alexander Stein wrote:
> 
> Thanks! Indeed at a first glance it looks straight forward. I was trying to 
> get an imx327 running on a imx8mm, called TQMa8MxML. See [1] for some details. 
> The cover letter describes the config setup. The media-ctl commands might help 
> your setup. Note the settle times are an ugly bitch and are crucial to be set 
> on my board, but I'm not sure why they have to be that way. Patch 1-8 are 
> obsolete by now with the updates to drivers/media/platform/nxp/ 
> imx-mipi-csis.c. Patch 9 might help you configure the DT.

Right, media-ctl is it.  In fact the pipelines have been properly set up so i 
only had to change the format.  The attached media graph is below

Now, there are two problems i'm stumbling upon.  One is related to the capture 
device not actually supporting imx492 format(s), which are:

	MEDIA_BUS_FMT_SGBRG10_1X10
	MEDIA_BUS_FMT_SGBRG12_1X12

which i guess is why i am being greeted with (when using v4l2-ctl):

	imx7-csi 32e20000.csi: capture format not valid

When i manually force it to something that is actually supported, 
MEDIA_BUS_FMT_SGBRG16_1X16, i get:

	imx7-csi 32e20000.csi: pipeline start failed with -67

Since this isn't one of the usual error numbers i guess it comes from within the 
driver code.  I might be getting this error because the source is 12 bit while 
the sink is 16 and i am breaking something, dunno.

Shall i go ahead and add MEDIA_BUS_FMT_SGBRG12_1X12 to the capture driver or i 
am missing something here?


The other problem is when v4l2 tries to allocate buffer for even a single frame.  
This is 8192x5556 10/12bit bayer sensor and, maybe not surprisingly i get 
"buffer allocation failed".  Is it possible that i'm the first to step on this 
issue on imx8m-mini or in general?


thanks,
Petko

[-- Attachment #2: media-graph --]
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Media controller API version 5.19.0

Media device information
------------------------
driver          imx7-csi
model           imx-media
serial          
bus info        platform:32e20000.csi
hw revision     0x0
driver version  5.19.0

Device topology
- entity 1: csi (2 pads, 2 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
	pad0: Sink
		[fmt:SGBRG12_1X12/4096x2048 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
		<- "csis-32e30000.mipi-csi":1 [ENABLED,IMMUTABLE]
	pad1: Source
		[fmt:SGBRG12_1X12/4096x2048 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:full-range]
		-> "csi capture":0 [ENABLED,IMMUTABLE]

- entity 4: csi capture (1 pad, 1 link)
            type Node subtype V4L flags 0
            device node name /dev/video0
	pad0: Sink
		<- "csi":1 [ENABLED,IMMUTABLE]

- entity 10: csis-32e30000.mipi-csi (2 pads, 2 links)
             type V4L2 subdev subtype Unknown flags 0
             device node name /dev/v4l-subdev1
	pad0: Sink
		[fmt:SGBRG12_1X12/4096x2048 field:none]
		<- "imx492 1-0010":0 []
	pad1: Source
		[fmt:SGBRG12_1X12/4096x2048 field:none]
		-> "csi":0 [ENABLED,IMMUTABLE]

- entity 15: imx492 1-0010 (1 pad, 1 link)
             type V4L2 subdev subtype Sensor flags 0
             device node name /dev/v4l-subdev2
	pad0: Source
		[fmt:SGBRG12_1X12/4096x2048 field:none colorspace:raw xfer:none]
		-> "csis-32e30000.mipi-csi":0 []