[PATCH] drm/amd/display: Avoid HDCP initialization in devices without output

[Deucher, Alexander]

[AMD Official Use Only - Internal Distribution Only]

Acked-by: Alex Deucher <alexander.deucher at amd.com>
________________________________
From: Siqueira, Rodrigo <Rodrigo.Siqueira at amd.com>
Sent: Friday, November 20, 2020 8:59 AM
To: amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>
Cc: Wentland, Harry <Harry.Wentland at amd.com>; Deucher, Alexander <Alexander.Deucher at amd.com>
Subject: [PATCH] drm/amd/display: Avoid HDCP initialization in devices without output

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.

Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 1da4ad529309..e213246e3f04 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1109,7 +1109,7 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
         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)
--
2.29.2

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