Re: [PATCH v3 00/11] CSI2RX support on J721E

[Tomi Valkeinen]

On 08/07/2021 11:19, Jacopo Mondi wrote:
> Hi Tomi, Pratyush,
>
> On Thu, Jul 08, 2021 at 12:26:38AM +0530, Pratyush Yadav wrote:
> > Hi Tomi,
> >
> > Thanks for looking into the patches.
> >
> > On 01/07/21 10:56AM, Tomi Valkeinen wrote:
> > > Hi Pratyush,
> > >
> > > On 24/06/2021 22:21, Pratyush Yadav wrote:
> > > > Hi,
> > > >
> > > > This series adds support for CSI2 capture on J721E. It includes some
> > > > fixes to the Cadence CSI2RX driver, adds runtime PM support to OV5640
> > > > driver, and finally adds the TI CSI2RX wrapper driver.
> > > >
> > > > This series used to include the DPHY and DMA engine patches as well, but
> > > > they have been split off to facilitate easier merging. Patch 3 is
> > > > build-dependent on the DPHY series [0].
> > > >
> > > > The DMA engine patch [1] can go in any order since that is only a run
> > > > time dependency. Things probably won't work without it but it will still
> > > > build fine.
> > > >
> > > > Tested on TI's J721E with OV5640 sensor.
> > >
> > > I applied these (csi-2 rx, phy, dma-engine) to linux-media/master, and added dts changes to add the csi2-rx. When sending the series, can you also push the branch you use for testing, as the posted patches do not include everything needed?
> >
> > Please use https://github.com/prati0100/linux-next/ branch "capture"
> >
> > I will include the link in the cover letter from next version onwards.
> >
> > > Here are some notes from quick tests:
> > >
> > > Capture works, but the fps is ~28.98. I would expect it to be closer to 30. Are the clocks configured correctly?
> >
> > I see this as well. I figured this had something to do with the sensor.
>
> Tomi you might remember your patch to change the h/vtot values which I
> collected in a series which I never managed to bring to v1, as Hugues
> reported it was broken for JPEG capture.
>
> I'll leave it here just for reference, I admit I dropped the ball
> rather quickly there:
> https://patchwork.linuxtv.org/project/linux-media/cover/20201028225706.110078-1-jacopo+renesas@xxxxxxxxxx/
>
> I wish I could re-test but seems I've lost the powering cable of the
> device I used to test ov5640 :(

Yes, I'm still using my hack patch when working with OV5640. With that 
hack, on TI platforms with CAL IP, I get ~30fps. With this series on J7, 
I get the above mentioned 28.98.

It's possible my hack patch is wrong, and CAL driver is buggy, but 
together they make things right. I guess I should also try J7 without my 
hack patch.

If I recall right, I tested your changes but I couldn't get them to work 
on my HW.

I haven't worked on that since then, as I decided that debugging blind 
is pointless. We need someone to analyze the signals to see what OV5640 
is sending. Or some new understanding about the OV5640 HW.

 Tomi