diff options
Diffstat (limited to '01-apple-gmux.patch')
| -rw-r--r-- | 01-apple-gmux.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/01-apple-gmux.patch b/01-apple-gmux.patch new file mode 100644 index 000000000000..f1a0621580a4 --- /dev/null +++ b/01-apple-gmux.patch @@ -0,0 +1,31 @@ +--- a/drivers/platform/x86/apple-gmux.c ++++ a/drivers/platform/x86/apple-gmux.c +@@ -419,6 +419,7 @@ static int gmux_resume(struct device *dev) + + static struct pci_dev *gmux_get_io_pdev(void) + { ++ struct pci_dev *igp = NULL, *dgp = NULL; + struct pci_dev *pdev = NULL; + + while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev))) { +@@ -428,10 +429,18 @@ static struct pci_dev *gmux_get_io_pdev(void) + if (!(cmd & PCI_COMMAND_IO)) + continue; + +- return pdev; ++ if (pdev->bus && pdev->bus->number > 0 && !dgp) ++ dgp = pci_dev_get(pdev); ++ else if (pdev->bus && pdev->bus->number == 0 && !igp) ++ igp = pci_dev_get(pdev); + } + +- return NULL; ++ if (dgp && !igp) ++ pr_warn("Found only discrete GPU %s, integrated GPU is hidden," ++ " unable to protect backlight behind VGA IO", ++ pci_name(dgp)); ++ pci_dev_put(dgp); ++ return igp; + } + + static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id) |