[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240301-light-impressive-grasshopper-adabeb@houat>
Date: Fri, 1 Mar 2024 11:30:56 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Sebastian Wick <sebastian.wick@...hat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, Jonathan Corbet <corbet@....net>,
Sandy Huang <hjc@...k-chips.com>, Heiko Stübner <heiko@...ech.de>,
Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>, Hans Verkuil <hverkuil@...all.nl>,
Ville Syrjälä <ville.syrjala@...ux.intel.com>, dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
Dave Stevenson <dave.stevenson@...pberrypi.com>
Subject: Re: [PATCH v7 21/36] drm/connector: hdmi: Add Broadcast RGB property
On Thu, Feb 29, 2024 at 08:47:26PM +0100, Sebastian Wick wrote:
> > @@ -1708,6 +1731,39 @@ EXPORT_SYMBOL(drm_connector_attach_dp_subconnector_property);
> > /**
> > * DOC: HDMI connector properties
> > *
> > + * Broadcast RGB (HDMI specific)
> > + * Indicates the Quantization Range (Full vs Limited) used. The color
> > + * processing pipeline will be adjusted to match the value of the
> > + * property, and the Infoframes will be generated and sent accordingly.
> > + *
> > + * This property is only relevant if the HDMI output format is RGB. If
> > + * it's one of the YCbCr variant, it will be ignored and the output will
> > + * use a limited quantization range.
>
> Uh, maybe just say that the quantization range is selected automatically
> in case a YCbCr output format is in use. I'm not sure every YCbCr
> variant requires limited and even if it does, new formats could change
> this.
I documented what i915 is doing:
https://elixir.bootlin.com/linux/latest/source/drivers/gpu/drm/i915/display/intel_hdmi.c#L2143
Maxime
Powered by blists - more mailing lists