diff options
| -rw-r--r-- | drivers/gpu/drm/bochs/bochs_hw.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c index e8b1dacc4911..460389702d31 100644 --- a/drivers/gpu/drm/bochs/bochs_hw.c +++ b/drivers/gpu/drm/bochs/bochs_hw.c @@ -51,7 +51,7 @@ int bochs_hw_init(struct drm_device *dev, uint32_t flags) { struct bochs_device *bochs = dev->dev_private; struct pci_dev *pdev = dev->pdev; - unsigned long addr, size, mem, ioaddr, iosize; + unsigned long addr, size, mem, ioaddr, iosize, qext_size; u16 id; if (pdev->resource[2].flags & IORESOURCE_MEM) { @@ -115,6 +115,24 @@ int bochs_hw_init(struct drm_device *dev, uint32_t flags) size / 1024, addr, bochs->ioports ? "ioports" : "mmio", ioaddr); + + if (bochs->mmio && pdev->revision >= 2) { + qext_size = readl(bochs->mmio + 0x600); + if (qext_size < 4 || qext_size > iosize) + goto noext; + DRM_DEBUG("Found qemu ext regs, size %ld\n", qext_size); + if (qext_size >= 8) { +#ifdef __BIG_ENDIAN + writel(0xbebebebe, bochs->mmio + 0x604); +#else + writel(0x1e1e1e1e, bochs->mmio + 0x604); +#endif + DRM_DEBUG(" qext endian: 0x%x\n", + readl(bochs->mmio + 0x604)); + } + } + +noext: return 0; } |