From: kettenis <kettenis@openbsd.org>
Date: Sat, 17 Aug 2024 10:41:24 +0000 (+0000)
Subject: Skip the FADT check on OpenBSD.  Without it the GPU (and display) will
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=7dd51cb71d1726956195fd6fccc88dcf4f8a21d5;p=openbsd

Skip the FADT check on OpenBSD.  Without it the GPU (and display) will
remain on in suspend-to-idle on some machines.  There is a comment
warning that this is risky, but let's find out how risky thus really is.

ok deraadt@
---

diff --git a/sys/dev/pci/drm/amd/amdgpu/amdgpu_acpi.c b/sys/dev/pci/drm/amd/amdgpu/amdgpu_acpi.c
index e13a31e63a4..ddf9850f629 100644
--- a/sys/dev/pci/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/sys/dev/pci/drm/amd/amdgpu/amdgpu_acpi.c
@@ -1519,6 +1519,7 @@ bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
 	if (adev->asic_type < CHIP_RAVEN)
 		return false;
 
+#ifdef __linux__
 	/*
 	 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
 	 * risky to do any special firmware-related preparations for entering
@@ -1531,6 +1532,7 @@ bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
 			      "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
 		return false;
 	}
+#endif
 
 #if !IS_ENABLED(CONFIG_AMD_PMC)
 	dev_err_once(adev->dev,