linux-kernel - Re: [PATCH 00/14] Add initial support for the Rockchip RK3588 HDMI TX Controller

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Date: Tue, 4 Jun 2024 22:44:04 +0300
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>,
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
 Sandy Huang <hjc@...k-chips.com>, Heiko Stübner
 <heiko@...ech.de>, Andy Yan <andy.yan@...k-chips.com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Mark Yao <markyao0591@...il.com>,
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org,
 devicetree@...r.kernel.org, kernel@...labora.com,
 Alexandre ARNOUD <aarnoud@...com>, Luis de Arquer <ldearquer@...il.com>,
 Algea Cao <algea.cao@...k-chips.com>
Subject: Re: [PATCH 00/14] Add initial support for the Rockchip RK3588 HDMI TX
 Controller

On 6/1/24 7:32 PM, Dmitry Baryshkov wrote:
> On Sat, Jun 01, 2024 at 04:12:22PM +0300, Cristian Ciocaltea wrote:
>> The RK3588 SoC family integrates a Quad-Pixel (QP) variant of the
>> Synopsys DesignWare HDMI TX controller used in the previous SoCs.
>>
>> It is HDMI 2.1 compliant and supports the following features, among
>> others:
>>
>> * Fixed Rate Link (FRL)
>> * 4K@...Hz and 8K@...z video modes
>> * Variable Refresh Rate (VRR) including Quick Media Switching (QMS)
>> * Fast Vactive (FVA)
>> * SCDC I2C DDC access
>> * TMDS Scrambler enabling 2160p@...z with RGB/YCbCr4:4:4
>> * YCbCr4:2:0 enabling 2160p@...z at lower HDMI link speeds
>> * Multi-stream audio
>> * Enhanced Audio Return Channel (EARC)
> 
> It would be really nice if you can take a look at using the HDMI
> connector framework (landed few days ago) with adaptations for the
> drm_bridge / drm_bridge_connector ([1]). Your comments for the
> drm_bridge patches would be defeinitely appreciated.
> 
> [1] https://lore.kernel.org/dri-devel/20240531-bridge-hdmi-connector-v4-0-5110f7943622@linaro.org/

I will definitely check and try to use it, but I'd rather wait a bit
until this gets stabilized and focus instead on the mandatory changes
required to upstream this driver. That's mostly because my limited
availability and expertise on the matter, while trying to unblock other
work depending on this.

Thanks,
Cristian