linux-kernel - Re: [PATCH v2 32/41] drm/vc4: vec: Convert to the new TV mode property

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Message-ID: <20220908112312.hlb7mzneuxnethhr@houat>
Date:   Thu, 8 Sep 2022 13:23:12 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Noralf Trønnes <noralf@...nnes.org>
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>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Karol Herbst <kherbst@...hat.com>,
        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: [PATCH v2 32/41] drm/vc4: vec: Convert to the new TV mode
 property

Hi Noralf,

On Tue, Aug 30, 2022 at 09:01:08PM +0200, Noralf Trønnes wrote:
> > +static const struct drm_prop_enum_list tv_mode_names[] = {
> 
> Maybe call it legacy_tv_mode_enums?
> 
> > 
> > +	{ VC4_VEC_TV_MODE_NTSC, "NTSC", },
> > 
> > +	{ VC4_VEC_TV_MODE_NTSC_J, "NTSC-J", },
> > 
> > +	{ VC4_VEC_TV_MODE_PAL, "PAL", },
> > 
> > +	{ VC4_VEC_TV_MODE_PAL_M, "PAL-M", },
> 
> If you use DRM_MODE_TV_MODE_* here you don't need to translate the value
> using the switch statement in get/set property, you can use the value
> directly to get/set tv.mode.

I'm sorry, I'm not quite sure what you mean by that. If we expose the
DRM_MODE_TV_MODE_* properties there, won't that change the values the
userspace will need to use to set that property?

Maxime