drm/amdgpu: PCI I/O bar can be disabled (b64a18c5) · Commits · 戴 / test

PCI I/O bar can be disabled in VBIOS to save the resource. It is often disabled in large aperture VBIOS. Don't call it an error. Signed-off-by:

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -885,7 +885,7 @@ static int amdgpu_atombios_init(struct amdgpu_device *adev)
		atom_card_info->ioreg_read = cail_ioreg_read;
		atom_card_info->ioreg_write = cail_ioreg_write;
		} else {
		DRM_ERROR("Unable to find PCI I/O BAR; using MMIO for ATOM IIO\n");
		DRM_INFO("PCI I/O BAR is not found. Using MMIO to access ATOM BIOS\n");
		atom_card_info->ioreg_read = cail_reg_read;
		atom_card_info->ioreg_write = cail_reg_write;
		}
		@@ -1694,7 +1694,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
		}
		}
		if (adev->rio_mem == NULL)
		DRM_ERROR("Unable to find PCI I/O BAR\n");
		DRM_INFO("PCI I/O BAR is not found.\n");

		/* early init functions */
		r = amdgpu_early_init(adev);