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Commit 06a08570 authored by Matthew Garrett's avatar Matthew Garrett Committed by Bjorn Helgaas
Browse files

radeon: Attempt to use platform-provided ROM image 



Some platforms only provide their PCI ROM via a platform-specific interface.
Fall back to attempting that if all other sources fail.

Signed-off-by: default avatarMatthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 121cdf08

drivers/gpu/drm/radeon/radeon_bios.c

+26 −0
Original line number Diff line number Diff line
@@ -99,6 +99,29 @@ static bool radeon_read_bios(struct radeon_device *rdev) 
	return true;

}



static bool radeon_read_platform_bios(struct radeon_device *rdev)

{

	uint8_t __iomem *bios;

	size_t size;



	rdev->bios = NULL;



	bios = pci_platform_rom(rdev->pdev, &size);

	if (!bios) {

		return false;

	}



	if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) {

		return false;

	}

	rdev->bios = kmemdup(bios, size, GFP_KERNEL);

	if (rdev->bios == NULL) {

		return false;

	}



	return true;

}



#ifdef CONFIG_ACPI

/* ATRM is used to get the BIOS on the discrete cards in

 * dual-gpu systems.
@@ -620,6 +643,9 @@ bool radeon_get_bios(struct radeon_device *rdev) 
	if (r == false) {

		r = radeon_read_disabled_bios(rdev);

	}

	if (r == false) {

		r = radeon_read_platform_bios(rdev);

	}

	if (r == false || rdev->bios == NULL) {

		DRM_ERROR("Unable to locate a BIOS ROM\n");

		rdev->bios = NULL;