Re: [PATCH 1/4] drm: Add I2C connector type

[Noralf Trønnes]

Den 02.02.2022 10.14, skrev Thomas Zimmermann:
> Hi Noralf,
> 
> since you're here, I'll just hijack the discussion to ask something only
> semi-related.
> 
> IIRC the gud driver doesn't update the display immediately during atomic
> commits. Instead, it instructs a helper thread to do the update. What's
> the rational behind this design? Is that something we should adopt for
> other drivers that operate over slow buses (USB, I2C, etc)? Would this
> be relevant for the ssd1307 driver?
> 

Async flushing is only necessary on multi display setups where there's
only one rendering loop for all the displays. I saw what tiny/gm12u320.c
did and Hans gave me the rationale. The SPI drivers run flushing inline.
Info on the gud wiki:
https://github.com/notro/gud/wiki/Linux-Host-Driver#asynchronous-flushing

Noralf.