Hi Adam,

On Fri, Nov 5, 2021 at 1:14 AM Adam Ford [off-list ref] wrote:

+Lucas Stach
I think I found the issue of the camera hanging. It appears to be
related to the disp-blk-ctrl virtual power domains.

In the NXP kernel, the dispmix power domain in ATF sets bits 16 and 17
of 32e2_8008 (GPR_MIPI_RESET_DIV), but the disp-blk-ctl driver only
configures 32e2_8000 (SFT_RSTN_CSR) and 32e2_8004 (CLK_EN_CSR).  As
soon as I set those extra bits, the hanging went away, and I got an
image and the image looked good.  I'll try to work on this tomorrow or
the weekend to submit a patch with a fixes tag to make sure the
IMX8MM_DISPBLK_PD_MIPI_CSI power domain properly configures the extra
register.

With this change, I didn't need to modify either the CSI-bridge driver
nor the mipi_csi driver, so when I get the blk-ctrl fix, I'll resubmit
this series on top of that with the corrections suggested as a proper
patch without the RFC.

That's great news! Thanks a lot for your good work.

Cheers

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