linux-kernel - Re: [PATCH 0/8] drm: bridge: dw_hdmi: Misc enable/disable, CEC and EDID cleanup

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Date: Fri, 21 Jun 2024 15:07:17 +0400
From: Christian Hewitt <christianshewitt@...il.com>
To: Jonas Karlman <jonas@...boo.se>
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
 Neil Armstrong <neil.armstrong@...aro.org>,
 Robert Foss <rfoss@...nel.org>,
 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>,
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
 Jernej Skrabec <jernej.skrabec@...il.com>,
 dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/8] drm: bridge: dw_hdmi: Misc enable/disable, CEC and
 EDID cleanup

> On 11 Jun 2024, at 7:50 PM, Jonas Karlman <jonas@...boo.se> wrote:
> 
> This series ensure poweron/poweroff and CEC phys addr invalidation is
> happening under drm mode_config mutex lock, and also ensure EDID is
> updated (when the dw-hdmi connector is used) after a hotplug pulse.
> 
> These changes has mainly been tested on Rockchip devices together with a
> forthcoming series that add HDMI 2.0 4K@...z support to RK3228, RK3328,
> RK3399 and RK3568.
> 
> Rockchip use the dw-hdmi connector so this should also be validated with
> a driver that use the bridge connector.

I’m not sure my level of kernel fiddling counts as proper validation
(Neil would be a more authoritative tester) but FWIW, I picked the
series to my 6.10-rc4 dev branch (for Amlogic devices supported by the
LibreELEC distro) and AFAICT everything is still working. Tested with
Amlogic GXBB, GXL and G12B boards.

Tested-by: Christian Hewitt <christianshewitt@...il.com>

> Jonas Karlman (8):
>  drm: bridge: dw_hdmi: Call poweron/poweroff from atomic enable/disable
>  drm: bridge: dw_hdmi: Use passed mode instead of stored previous_mode
>  drm: bridge: dw_hdmi: Fold poweron and setup functions
>  drm: bridge: dw_hdmi: Remove previous_mode and mode_set
>  drm: bridge: dw_hdmi: Invalidate CEC phys addr from connector detect
>  drm: bridge: dw_hdmi: Remove cec_notifier_mutex
>  drm: bridge: dw_hdmi: Update EDID during hotplug processing
>  drm: bridge: dw_hdmi: Use display_info is_hdmi and has_audio
> 
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 145 ++++++----------------
> 1 file changed, 39 insertions(+), 106 deletions(-)