linux-kernel - Re: Re: [PATCH v2 36/41] drm/sun4i: tv: Merge mode_set into atomic

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Message-ID: <4210281.ejJDZkT8p0@kista>
Date:   Wed, 07 Sep 2022 17:09:04 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Ben Skeggs <bskeggs@...hat.com>, David Airlie <airlied@...ux.ie>,
        Chen-Yu Tsai <wens@...e.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Lyude Paul <lyude@...hat.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Samuel Holland <samuel@...lland.org>,
        Karol Herbst <kherbst@...hat.com>,
        Noralf Trønnes <noralf@...nnes.org>,
        Emma Anholt <emma@...olt.net>, Daniel Vetter <daniel@...ll.ch>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        linux-arm-kernel@...ts.infradead.org,
        Phil Elwell <phil@...pberrypi.com>,
        intel-gfx@...ts.freedesktop.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        dri-devel@...ts.freedesktop.org, Dom Cobley <dom@...pberrypi.com>,
        linux-kernel@...r.kernel.org, nouveau@...ts.freedesktop.org,
        linux-sunxi@...ts.linux.dev,
        Mateusz Kwiatkowski <kfyatek+publicgit@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: Re: [PATCH v2 36/41] drm/sun4i: tv: Merge mode_set into atomic_enable

Dne sreda, 07. september 2022 ob 09:41:34 CEST je Maxime Ripard napisal(a):
> 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_he
> lper.c#L1064
> 
> And enabled here:
> https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/drm_atomic_he
> lper.c#L1403
> 
> With drm_atomic_crtc_needs_modeset() being defined here:
> https://elixir.bootlin.com/linux/latest/source/include/drm/drm_atomic.h#L104
> 9

Right.

Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej