diff options
| author | Matthew Garrett | 2013-03-26 17:25:56 -0400 |
|---|---|---|
| committer | Bjorn Helgaas | 2013-04-01 14:10:44 -0600 |
| commit | 06a08570085b3b20c45f45dc66dc46851ecbcb5b (patch) | |
| tree | 7897a9f6b90d088cf6d3b240bd8c8b142f822d36 /drivers/gpu | |
| parent | 121cdf08cc854bda4892d2c755e32ef424772ac2 (diff) | |
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: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_bios.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c index b8015913d382..fa3c56fba294 100644 --- a/drivers/gpu/drm/radeon/radeon_bios.c +++ b/drivers/gpu/drm/radeon/radeon_bios.c @@ -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; |