diff options
| -rw-r--r-- | drivers/video/fbdev/efifb.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c index 1e784adb89b1..3a010641f630 100644 --- a/drivers/video/fbdev/efifb.c +++ b/drivers/video/fbdev/efifb.c @@ -149,6 +149,10 @@ ATTRIBUTE_GROUPS(efifb); static bool pci_dev_disabled; /* FB base matches BAR of a disabled device */ +static struct pci_dev *efifb_pci_dev; /* dev with BAR covering the efifb */ +static struct resource *bar_resource; +static u64 bar_offset; + static int efifb_probe(struct platform_device *dev) { struct fb_info *info; @@ -203,6 +207,13 @@ static int efifb_probe(struct platform_device *dev) efifb_fix.smem_start |= ext_lfb_base; } + if (bar_resource && + bar_resource->start + bar_offset != efifb_fix.smem_start) { + dev_info(&efifb_pci_dev->dev, + "BAR has moved, updating efifb address\n"); + efifb_fix.smem_start = bar_resource->start + bar_offset; + } + efifb_defined.bits_per_pixel = screen_info.lfb_depth; efifb_defined.xres = screen_info.lfb_width; efifb_defined.yres = screen_info.lfb_height; @@ -370,15 +381,13 @@ static struct platform_driver efifb_driver = { builtin_platform_driver(efifb_driver); -#if defined(CONFIG_PCI) && !defined(CONFIG_X86) - -static bool pci_bar_found; /* did we find a BAR matching the efifb base? */ +#if defined(CONFIG_PCI) -static void claim_efifb_bar(struct pci_dev *dev, int idx) +static void record_efifb_bar_resource(struct pci_dev *dev, int idx, u64 offset) { u16 word; - pci_bar_found = true; + efifb_pci_dev = dev; pci_read_config_word(dev, PCI_COMMAND, &word); if (!(word & PCI_COMMAND_MEMORY)) { @@ -389,12 +398,8 @@ static void claim_efifb_bar(struct pci_dev *dev, int idx) return; } - if (pci_claim_resource(dev, idx)) { - pci_dev_disabled = true; - dev_err(&dev->dev, - "BAR %d: failed to claim resource for efifb!\n", idx); - return; - } + bar_resource = &dev->resource[idx]; + bar_offset = offset; dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx); } @@ -405,7 +410,7 @@ static void efifb_fixup_resources(struct pci_dev *dev) u64 size = screen_info.lfb_size; int i; - if (pci_bar_found || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) + if (efifb_pci_dev || screen_info.orig_video_isVGA != VIDEO_TYPE_EFI) return; if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) @@ -421,7 +426,7 @@ static void efifb_fixup_resources(struct pci_dev *dev) continue; if (res->start <= base && res->end >= base + size - 1) { - claim_efifb_bar(dev, i); + record_efifb_bar_resource(dev, i, base - res->start); break; } } |