Re: [PATCH v2 36/41] drm/sun4i: tv: Merge mode_set into atomic_enable
From: Maxime Ripard
Date: Wed Sep 07 2022 - 03:41:58 EST
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
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