On Tue, Sep 06, 2022 at 10:04:32PM +0200, Jernej Škrabec wrote:
> Dne ponedeljek, 29. avgust 2022 ob 15:11:50 CEST je Maxime Ripard napisal(a):
> > Our mode_set implementation can be merged into our atomic_enable
> > implementation to simplify things, so let's do this.
> 
> Are you sure this is a good thing in long term? What if user wants to change 
> mode? Unlikely, but why not.

It doesn't change anything feature-wise: whenever the mode is changed on
the CRTC, the encoder is going to be disabled and enabled.

It's disabled here:
https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/drm_atomic_helper.c#L1064

And enabled here:
https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/drm_atomic_helper.c#L1403

With drm_atomic_crtc_needs_modeset() being defined here:
https://elixir.bootlin.com/linux/latest/source/include/drm/drm_atomic.h#L1049

Maxime