diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_bios.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_bios.c | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c index 96e37a6e7ce4..34a9b9119518 100644 --- a/drivers/gpu/drm/radeon/radeon_bios.c +++ b/drivers/gpu/drm/radeon/radeon_bios.c @@ -33,12 +33,50 @@ /* * BIOS. */ + +/* If you boot an IGP board with a discrete card as the primary, + * the IGP rom is not accessible via the rom bar as the IGP rom is + * part of the system bios. On boot, the system bios puts a + * copy of the igp rom at the start of vram if a discrete card is + * present. + */ +static bool igp_read_bios_from_vram(struct radeon_device *rdev) +{ + uint8_t __iomem *bios; + resource_size_t vram_base; + resource_size_t size = 256 * 1024; /* ??? */ + + rdev->bios = NULL; + vram_base = drm_get_resource_start(rdev->ddev, 0); + bios = ioremap(vram_base, size); + if (!bios) { + DRM_ERROR("Unable to mmap vram\n"); + return false; + } + + if (size == 0 || bios[0] != 0x55 || bios[1] != 0xaa) { + iounmap(bios); + DRM_ERROR("bad rom signature\n"); + return false; + } + rdev->bios = kmalloc(size, GFP_KERNEL); + if (rdev->bios == NULL) { + iounmap(bios); + DRM_ERROR("kmalloc failed\n"); + return false; + } + memcpy(rdev->bios, bios, size); + iounmap(bios); + return true; +} + static bool radeon_read_bios(struct radeon_device *rdev) { uint8_t __iomem *bios; size_t size; rdev->bios = NULL; + /* XXX: some cards may return 0 for rom size? ddx has a workaround */ bios = pci_map_rom(rdev->pdev, &size); if (!bios) { return false; @@ -341,7 +379,9 @@ static bool legacy_read_disabled_bios(struct radeon_device *rdev) static bool radeon_read_disabled_bios(struct radeon_device *rdev) { - if (rdev->family >= CHIP_RV770) + if (rdev->flags & RADEON_IS_IGP) + return igp_read_bios_from_vram(rdev); + else if (rdev->family >= CHIP_RV770) return r700_read_disabled_bios(rdev); else if (rdev->family >= CHIP_R600) return r600_read_disabled_bios(rdev); @@ -356,7 +396,12 @@ bool radeon_get_bios(struct radeon_device *rdev) bool r; uint16_t tmp; - r = radeon_read_bios(rdev); + if (rdev->flags & RADEON_IS_IGP) { + r = igp_read_bios_from_vram(rdev); + if (r == false) + r = radeon_read_bios(rdev); + } else + r = radeon_read_bios(rdev); if (r == false) { r = radeon_read_disabled_bios(rdev); } |