On Thu, Aug 16, 2012 at 1:54 PM, alexdeucher@gmail.com wrote:
From: David L equinox-freedesktopbugs@diac24.net
This is required for pure UEFI systems. The vbios is stored in ACPI rather than at the legacy vga location.
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=26891
Signed-off-by: Alex Deucher alexander.deucher@amd.com
Reviewed-by: Jerome Glisse jglisse@redhat.com
Cc: stable@vger.kernel.org
drivers/gpu/drm/radeon/radeon_bios.c | 59 ++++++++++++++++++++++++++++++++++ 1 files changed, 59 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c index 501f488..f06494a7 100644 --- a/drivers/gpu/drm/radeon/radeon_bios.c +++ b/drivers/gpu/drm/radeon/radeon_bios.c @@ -32,6 +32,9 @@
#include <linux/vga_switcheroo.h> #include <linux/slab.h> +#ifdef CONFIG_ACPI +#include <linux/acpi.h> +#endif /*
- BIOS.
*/ @@ -476,6 +479,58 @@ static bool radeon_read_disabled_bios(struct radeon_device *rdev) return legacy_read_disabled_bios(rdev); }
+#ifdef CONFIG_ACPI +static bool radeon_acpi_vfct_bios(struct radeon_device *rdev) +{
bool ret = false;struct acpi_table_header *hdr;/* acpi_get_table_with_size is not exported :( */acpi_size tbl_size = 0x7fffffff;UEFI_ACPI_VFCT *vfct;GOP_VBIOS_CONTENT *vbios;VFCT_IMAGE_HEADER *vhdr;if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr)))return false;if (tbl_size < sizeof(UEFI_ACPI_VFCT)) {DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n");goto out_unmap;}vfct = (UEFI_ACPI_VFCT *)hdr;if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) {DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n");goto out_unmap;}vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset);vhdr = &vbios->VbiosHeader;DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n",vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction,vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength);if (vhdr->PCIBus != rdev->pdev->bus->number ||vhdr->PCIDevice != PCI_SLOT(rdev->pdev->devfn) ||vhdr->PCIFunction != PCI_FUNC(rdev->pdev->devfn) ||vhdr->VendorID != rdev->pdev->vendor ||vhdr->DeviceID != rdev->pdev->device) {DRM_INFO("ACPI VFCT table is not for this card\n");goto out_unmap;};if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) {DRM_ERROR("ACPI VFCT image truncated\n");goto out_unmap;}rdev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL);ret = !!rdev->bios;+out_unmap:
/* uh, no idea what to do here... */return ret;+} +#endif
bool radeon_get_bios(struct radeon_device *rdev) { @@ -487,6 +542,10 @@ bool radeon_get_bios(struct radeon_device *rdev) r = igp_read_bios_from_vram(rdev); if (r == false) r = radeon_read_bios(rdev); +#ifdef CONFIG_ACPI
if (r == false)r = radeon_acpi_vfct_bios(rdev);+#endif if (r == false) { r = radeon_read_disabled_bios(rdev); } -- 1.7.7.5
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