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(-)
diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn31/dcn31_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn31/dcn31_resource.c index 911bd60d4fbc..3c42ba8566cf 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dcn31/dcn31_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dcn31/dcn31_resource.c @@ -890,7 +890,7 @@ static const struct dc_debug_options debug_defaults_drv = { .disable_z10 = true, .enable_legacy_fast_update = true, .enable_z9_disable_interface = true, /* Allow support for the PMFW interface for disable Z9*/ - .dml_hostvm_override = DML_HOSTVM_NO_OVERRIDE, + .dml_hostvm_override = DML_HOSTVM_OVERRIDE_FALSE, .using_dml2 = false, };
[ Sasha's backport helper bot ]
Hi,
Summary of potential issues: ⚠️ Found matching upstream commit but patch is missing proper reference to it
Found matching upstream commit: ba93dddfc92084a1e28ea447ec4f8315f3d8d3fd
WARNING: Author mismatch between patch and found commit: Backport author: Alex Deucheralexander.deucher@amd.com Commit author: Aurabindo Pillaiaurabindo.pillai@amd.com
Note: The patch differs from the upstream commit: --- 1: ba93dddfc9208 ! 1: 5e9fb61f1028c drm/amd/display: Temporarily disable hostvm on DCN31 @@ Commit message 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 ## @@ drivers/gpu/drm/amd/display/dc/resource/dcn31/dcn31_resource.c: static const struct dc_debug_options debug_defaults_drv = { ---
Results of testing on various branches:
| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.14.y | Success | Success | | stable/linux-6.13.y | Success | Success | | stable/linux-6.12.y | Success | Success | | stable/linux-6.6.y | Success | Success | | stable/linux-6.1.y | Success | Success | | stable/linux-5.15.y | Success | Success | | stable/linux-5.10.y | Success | Success | | stable/linux-5.4.y | Success | Success |
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(-)
What tree(s) is this for?
[Public]
-----Original Message----- From: Greg KH gregkh@linuxfoundation.org Sent: Tuesday, April 8, 2025 2:45 AM To: Deucher, Alexander Alexander.Deucher@amd.com Cc: stable@vger.kernel.org; sashal@kernel.org; Pillai, Aurabindo Aurabindo.Pillai@amd.com; Li, Sun peng (Leo) Sunpeng.Li@amd.com; Mohamed, Zaeem Zaeem.Mohamed@amd.com; Wheeler, Daniel Daniel.Wheeler@amd.com Subject: Re: [PATCH] drm/amd/display: Temporarily disable hostvm on DCN31
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(-)
What tree(s) is this for?
6.10 and newer.
Thanks,
Alex
linux-stable-mirror@lists.linaro.org
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Alex Deucher -
Deucher, Alexander
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Greg KH -
Sasha Levin