[PATCH] drm/amd: Limit seamless boot by default to APUs

[Deucher, Alexander]

[AMD Official Use Only - General]

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
________________________________
From: Limonciello, Mario <Mario.Limonciello at amd.com>
Sent: Monday, September 25, 2023 9:44 PM
To: amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>
Cc: Limonciello, Mario <Mario.Limonciello at amd.com>; Deucher, Alexander <Alexander.Deucher at amd.com>; Xu, Feifei <Feifei.Xu at amd.com>
Subject: [PATCH] drm/amd: Limit seamless boot by default to APUs

A hang is reported on DCN 3.2 with seamless boot enabled.
As the benefits come from an eDP setup, limit it to only enabled
by default with APUs.

Suggested-by: Alexander.Deucher at amd.com
Reported-by: feifei.xu at amd.com
Closes: https://lore.kernel.org/amd-gfx/85b427f6-11ec-4249-bf6f-eadf9c375f88@amd.com/T/#m2887e919d7c01b2a4860d2261b366d22e070f309
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 22c0e035de81..5436d7a34014 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1380,6 +1380,9 @@ bool amdgpu_device_seamless_boot_supported(struct amdgpu_device *adev)
                 return false;
         }

+       if (!(adev->flags & AMD_IS_APU))
+               return false;
+
         if (adev->mman.keep_stolen_vga_memory)
                 return false;

--
2.34.1

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