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drm/nouveau/acpi: allow non-optimus setups to load vbios from acpi 

There appear to be a crop of new hardware where the vbios is not
available from PROM/PRAMIN, but there is a valid _ROM method in ACPI.
The data read from PCIROM almost invariably contains invalid
instructions (still has the x86 opcodes), which makes this a low-risk
way to try to obtain a valid vbios image.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76475
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: <stable@vger.kernel.org> # v2.6.35+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ilia Mirkin 2014-03-26 19:37:21 -04:00 committed by Ben Skeggs
parent 40189b0c65
commit a3d0b1218d
1 changed files with 0 additions and 3 deletions
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3
drivers/gpu/drm/nouveau/nouveau_acpi.c
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@ -389,9 +389,6 @@ bool nouveau_acpi_rom_supported(struct pci_dev *pdev)
acpi_status status;
acpi_handle dhandle, rom_handle;
if (!nouveau_dsm_priv.dsm_detected && !nouveau_dsm_priv.optimus_detected)
return false;
dhandle = ACPI_HANDLE(&pdev->dev);
if (!dhandle)
return false;