Re: [PATCH RFC 1/4] media: imx8mq-mipi-csi2: Make reset release SoC-specific

[Philipp Zabel]

On Do, 2026-06-25 at 20:06 -0400, Vincent Cloutier wrote:
> From: Vincent Cloutier <vincent@xxxxxxxxxxx>
> 
> The CSI-2 software reset helper currently asserts the reset control and
> then releases it again unconditionally.
> 
> That release step is required by the i.MX8QXP path, but it changes the
> reset sequence used by i.MX8MQ. On Librem 5r4, which is i.MX8MQ-based,
> the unconditional release step prevents the camera pipeline from producing
> frames after reset; captures time out waiting for EOF from the CSI bridge.
> 
> This series enables the Librem 5 rear camera on the second i.MX8MQ CSI-2
> receiver. Keep the i.MX8MQ path on the known-working assert-only software
> reset sequence while preserving the explicit release step for i.MX8QXP.
> 
> Make reset release opt-in through platform data.
> 
> Tested on Librem 5r4 with the existing HI846 front camera and the S5K3L6
> rear camera added by this series.

I think you are missing [1] ("reset: imx7: Correct polarity of MIPI CSI
resets on i.MX8MQ") instead.

[1] https://lore.kernel.org/all/20260619073115.3778313-1-robby.cai@xxxxxxxxxxx/


regards
Philipp