Re: [PATCH 2/2] drm: bridge: ti-sn65dsi83: Add error recovery mechanism

[Marek Vasut]

On 10/24/24 11:55 AM, Herve Codina wrote:
> In some cases observed during ESD tests, the TI SN65DSI83 cannot recover
> from errors by itself. A full restart of the bridge is needed in those
> cases to have the bridge output LVDS signals again.

I have seen the bridge being flaky sometimes, do you have any more 
details of what is going on when this irrecoverable error occurs ?

> The TI SN65DSI83 has some error detection capabilities. Introduce an
> error recovery mechanism based on this detection.
>
> The errors detected are signaled through an interrupt. On system where
> this interrupt is not available, the driver uses a polling monitoring
> fallback to check for errors. When an error is present, the recovery
> process is launched.
>
> Restarting the bridge needs to redo the initialization sequence. This
> initialization sequence has to be done with the DSI data lanes driven in
> LP11 state. In order to do that, the recovery process resets the entire
> pipeline.

+CC Michael regarding the LP11 part , I think there was some development 
to switch lanes into LP11 mode on request ?

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