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Date: Tue, 8 Apr 2025 08:45:13 +0200
From: Greg KH <gregkh@linuxfoundation.org>
To: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org, sashal@kernel.org,
	Aurabindo Pillai <aurabindo.pillai@amd.com>,
	Sun peng Li <sunpeng.li@amd.com>,
	Zaeem Mohamed <zaeem.mohamed@amd.com>,
	Daniel Wheeler <daniel.wheeler@amd.com>
Subject: Re: [PATCH] drm/amd/display: Temporarily disable hostvm on DCN31
Message-ID: <2025040802-seltzer-pedigree-d053@gregkh>
References: <20250407234329.2347358-1-alexander.deucher@amd.com>
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In-Reply-To: <20250407234329.2347358-1-alexander.deucher@amd.com>

On Mon, Apr 07, 2025 at 07:43:29PM -0400, Alex Deucher wrote:
> From: Aurabindo Pillai <aurabindo.pillai@amd.com>
> 
> With HostVM enabled, DCN31 fails to pass validation for 3x4k60. Some Linux
> userspace does not downgrade one of the monitors to 4k30, and the result
> is that the monitor does not light up. Disable it until the bandwidth
> calculation failure is resolved.
> 
> Reviewed-by: Sun peng Li <sunpeng.li@amd.com>
> Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
> Signed-off-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> (cherry picked from commit ba93dddfc92084a1e28ea447ec4f8315f3d8d3fd)
> Cc: stable@vger.kernel.org
> ---
>  drivers/gpu/drm/amd/display/dc/resource/dcn31/dcn31_resource.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

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