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Date: Fri, 26 Jan 2024 17:25:30 -0800
From: Greg KH <gregkh@linuxfoundation.org>
To: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org, sashal@kernel.org,
	Wayne Lin <wayne.lin@amd.com>,
	Daniel Wheeler <daniel.wheeler@amd.com>,
	Jerry Zuo <jerry.zuo@amd.com>,
	Rodrigo Siqueira <rodrigo.siqueira@amd.com>,
	Wade Wang <wade.wang@hp.com>
Subject: Re: [PATCH] drm/amd/display: pbn_div need be updated for hotplug
 event
Message-ID: <2024012623-snuff-veneering-db1b@gregkh>
References: <20240123204106.3602399-1-alexander.deucher@amd.com>
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In-Reply-To: <20240123204106.3602399-1-alexander.deucher@amd.com>

On Tue, Jan 23, 2024 at 03:41:06PM -0500, Alex Deucher wrote:
> From: Wayne Lin <wayne.lin@amd.com>
> 
> link_rate sometime will be changed when DP MST connector hotplug, so
> pbn_div also need be updated; otherwise, it will mismatch with
> link_rate, causes no output in external monitor.
> 
> This is a backport of
> commit 9cdef4f72037 ("drm/amd/display: pbn_div need be updated for hotplug event")
> to 6.1.  This fixes a display light up failure on some docking stations.
> 
> Cc: stable@vger.kernel.org
> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
> Reviewed-by: Jerry Zuo <jerry.zuo@amd.com>
> Acked-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
> Signed-off-by: Wade Wang <wade.wang@hp.com>
> Signed-off-by: Wayne Lin <wayne.lin@amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> (cherry picked from commit 9cdef4f720376ef0fb0febce1ed2377c19e531f9)
> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

Now queued up, thanks.

greg k-h