diff options
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index c66c0ca446c4..208aacf39329 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5012,6 +5012,36 @@ DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, quirk_gpu_usb_typec_ucsi); /* + * Enable the NVIDIA GPU integrated HDA controller if the BIOS left it + * disabled. https://devtalk.nvidia.com/default/topic/1024022 + */ +static void quirk_nvidia_hda(struct pci_dev *gpu) +{ + u8 hdr_type; + u32 val; + + /* There was no integrated HDA controller before MCP89 */ + if (gpu->device < PCI_DEVICE_ID_NVIDIA_GEFORCE_320M) + return; + + /* Bit 25 at offset 0x488 enables the HDA controller */ + pci_read_config_dword(gpu, 0x488, &val); + if (val & BIT(25)) + return; + + pci_info(gpu, "Enabling HDA controller\n"); + pci_write_config_dword(gpu, 0x488, val | BIT(25)); + + /* The GPU becomes a multi-function device when the HDA is enabled */ + pci_read_config_byte(gpu, PCI_HEADER_TYPE, &hdr_type); + gpu->multifunction = !!(hdr_type & 0x80); +} +DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, + PCI_BASE_CLASS_DISPLAY, 16, quirk_nvidia_hda); +DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, + PCI_BASE_CLASS_DISPLAY, 16, quirk_nvidia_hda); + +/* * Some IDT switches incorrectly flag an ACS Source Validation error on * completions for config read requests even though PCIe r4.0, sec * 6.12.1.1, says that completions are never affected by ACS Source |