linux-kernel - Re: [PATCH v2 0/2] drm/bridge: analogix_dp: Self-refresh state machine fixes

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Message-ID: <CA+ASDXNSThy7usMKkN22VBq2iyej7sCJ8CAmgnNvxDgZiMbukA@mail.gmail.com>
Date:   Thu, 10 Mar 2022 15:50:00 -0800
From:   Brian Norris <briannorris@...omium.org>
To:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Sean Paul <sean@...rly.run>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        Sean Paul <seanpaul@...omium.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Heiko Stuebner <heiko@...ech.de>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Liu Ying <victor.liu@....nxp.com>,
        Doug Anderson <dianders@...omium.org>
Subject: Re: [PATCH v2 0/2] drm/bridge: analogix_dp: Self-refresh state
 machine fixes

On Mon, Feb 28, 2022 at 12:25 PM Brian Norris <briannorris@...omium.org> wrote:
>
> Hi,
>
> I've been investigating several eDP issues on a Rockchip RK3399 system
> and have two proposed bugfixes. RK3399 has two CRTCs, either of which
> can be used for eDP output. For both fixes, we have bugs due to the
> relationship between the generalized "self refresh helpers" and the
> analogix-dp bridge driver which controls much of the PSR mechanics.
> These bugs are most visible when switching between CRTCs.
>
> I'm not a DRM expert, but I've been poking at a lot of Rockchip display
> drivers recently. I'd love some skeptical eyes, so feel free to ask
> questions if I haven't explained issues well, or the proposals look
> fishy.
>
> Regards,
> Brian

Ping for review? Sean, perhaps? (You already reviewed this on the
Chromium tracker.)

Brian