This is a note to let you know that I've just added the patch titled drm/amd/display: Avoid HDCP initialization in devices without output to the 5.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-amd-display-avoid-hdcp-initialization-in-devices-without-output.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From d661155bfca329851a27bb5120fab027db43bd23 Mon Sep 17 00:00:00 2001 From: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx> Date: Tue, 17 Nov 2020 15:25:48 -0500 Subject: drm/amd/display: Avoid HDCP initialization in devices without output From: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx> commit d661155bfca329851a27bb5120fab027db43bd23 upstream. The HDCP feature requires at least one connector attached to the device; however, some GPUs do not have a physical output, making the HDCP initialization irrelevant. This patch disables HDCP initialization when the graphic card does not have output. Acked-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -960,7 +960,7 @@ static int amdgpu_dm_init(struct amdgpu_ amdgpu_dm_init_color_mod(); #ifdef CONFIG_DRM_AMD_DC_HDCP - if (adev->asic_type >= CHIP_RAVEN) { + if (adev->dm.dc->caps.max_links > 0 && adev->asic_type >= CHIP_RAVEN) { adev->dm.hdcp_workqueue = hdcp_create_workqueue(adev, &init_params.cp_psp, adev->dm.dc); if (!adev->dm.hdcp_workqueue) Patches currently in stable-queue which might be from Rodrigo.Siqueira@xxxxxxx are queue-5.9/drm-amd-display-avoid-hdcp-initialization-in-devices-without-output.patch