linux-kernel - Re: [PATCH v2 20/27] drm/rockchip: inno_hdmi: Correctly setup HDMI quantization range

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Message-ID: <rrtknir3vizvcyamp3kfy47r6uppn3wwevb6a5gln2k533t52z@otm6vum6pg43>
Date: Mon, 18 Dec 2023 10:05:07 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Alex Bee <knaerzche@...il.com>
Cc: Sandy Huang <hjc@...k-chips.com>, 
	Heiko Stübner <heiko@...ech.de>, Andy Yan <andyshrk@....com>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Thomas Zimmermann <tzimmermann@...e.de>, 
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, devicetree@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 20/27] drm/rockchip: inno_hdmi: Correctly setup HDMI
 quantization range

On Sat, Dec 16, 2023 at 05:26:31PM +0100, Alex Bee wrote:
> @@ -431,6 +452,9 @@ static int inno_hdmi_setup(struct inno_hdmi *hdmi,
>  	else
>  		inno_conn_state->colorimetry = HDMI_COLORIMETRY_ITU_709;
>  
> +	inno_conn_state->rgb_limited_range =
> +		drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_LIMITED;
> +
>  	/* Mute video and audio output */
>  	hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
>  		  v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1));

This needs to be done at atomic_check time: the expectation is that by
the time you commit the state, everything is prepared for it.

Maxime

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