linux-kernel - Re: [PATCH] drm/meson: Don't remove bridges which are created by other drivers

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Date: Mon, 19 Feb 2024 09:47:13 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: linux-amlogic@...ts.infradead.org, dri-devel@...ts.freedesktop.org, 
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc: maarten.lankhorst@...ux.intel.com, mripard@...nel.org, 
 tzimmermann@...e.de, airlied@...il.com, daniel@...ll.ch, 
 khilman@...libre.com, jbrunet@...libre.com, adrian.larumbe@...labora.com, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 stable@...r.kernel.org, Steve Morvai <stevemorvai@...mail.com>
Subject: Re: [PATCH] drm/meson: Don't remove bridges which are created by
 other drivers

Hi,

On Thu, 15 Feb 2024 23:04:42 +0100, Martin Blumenstingl wrote:
> Stop calling drm_bridge_remove() for bridges allocated/managed by other
> drivers in the remove paths of meson_encoder_{cvbs,dsi,hdmi}.
> drm_bridge_remove() unregisters the bridge so it cannot be used
> anymore. Doing so for bridges we don't own can lead to the video
> pipeline not being able to come up after -EPROBE_DEFER of the VPU
> because we're unregistering a bridge that's managed by another driver.
> The other driver doesn't know that we have unregistered it's bridge
> and on subsequent .probe() we're not able to find those bridges anymore
> (since nobody re-creates them).
> 
> [...]

Thanks, Applied to https://anongit.freedesktop.org/git/drm/drm-misc.git (drm-misc-fixes)

[1/1] drm/meson: Don't remove bridges which are created by other drivers
      https://cgit.freedesktop.org/drm/drm-misc/commit/?id=bd915ae73a2d78559b376ad2caf5e4ef51de2455

-- 
Neil