linux-stable/drivers/pci
Lukas Wunner b516ea586d PCI: Enable NVIDIA HDA controllers
Many NVIDIA GPUs can be configured as either a single-function video device
or a multi-function device with video at function 0 and an HDA audio
controller at function 1.  The HDA controller can be enabled or disabled by
a bit in the function 0 config space.

Some BIOSes leave the HDA disabled, which means the HDMI connector from the
NVIDIA GPU may not work.  Sometimes the BIOS enables the HDA if an HDMI
cable is connected at boot time, but that doesn't handle hotplug cases.

Enable the HDA controller on device enumeration and resume and re-read the
header type, which tells us whether the GPU is a multi-function device.

This quirk is limited to NVIDIA PCI devices with the VGA Controller device
class.  This is expected to correspond to product configurations where the
NVIDIA GPU has connectors attached.  Other products where the device class
is 3D Controller are expected to correspond to configurations where the
NVIDIA GPU is dedicated (dGPU) and has no connectors.  See original post
(URL below) for more details.

This commit takes inspiration from an earlier patch by Daniel Drake.

Link: https://lore.kernel.org/r/20190708051744.24039-1-drake@endlessm.com v2
Link: https://lore.kernel.org/r/20190613063514.15317-1-drake@endlessm.com v1
Link: https://devtalk.nvidia.com/default/topic/1024022
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75985
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Daniel Drake <drake@endlessm.com>
[bhelgaas: commit log, log message, return early if already enabled]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Aaron Plattner <aplattner@nvidia.com>
Cc: Peter Wu <peter@lekensteyn.nl>
Cc: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: Karol Herbst <kherbst@redhat.com>
Cc: Maik Freudenberg <hhfeuer@gmx.de>
2019-07-11 11:13:26 -05:00
..
controller pci-v5.2-changes 2019-05-14 10:30:10 -07:00
endpoint Merge branch 'remotes/lorenzo/pci/misc' 2019-05-13 18:34:44 -05:00
hotplug pci-v5.2-changes 2019-05-14 10:30:10 -07:00
pcie pci-v5.2-changes 2019-05-14 10:30:10 -07:00
switch pci-v5.2-changes 2019-05-14 10:30:10 -07:00
access.c PCI: Uninline PCI bus accessors for better ftracing 2018-10-04 16:37:37 -05:00
ats.c PCI/ATS: Add pci_ats_page_aligned() interface 2019-02-26 11:08:07 +01:00
bus.c PCI: Replace dev_printk(KERN_DEBUG) with dev_info(), etc 2019-05-09 07:49:58 -05:00
ecam.c
host-bridge.c
iov.c PCI/IOV: Add flag so platforms can skip VF scanning 2019-01-01 19:04:37 -06:00
irq.c
Kconfig PCI: Fix PCI kconfig menu organization 2019-01-14 17:01:20 -06:00
Makefile PCI: OF: Allow of_pci_get_max_link_speed() to be used by PCI Endpoint drivers 2019-04-15 13:24:02 +01:00
mmap.c
msi.c PCI: Add pci_dev_id() helper 2019-04-29 16:12:05 -05:00
of.c Merge branch 'remotes/lorenzo/pci/keystone' 2019-05-13 18:34:41 -05:00
p2pdma.c PCI/P2PDMA: Allow P2P DMA between any devices under AMD ZEN Root Complex 2019-05-01 16:53:39 -05:00
pci-acpi.c Merge branch 'pci/printk' 2019-05-13 18:34:46 -05:00
pci-bridge-emul.c PCI: pci-bridge-emul: Extend pci_bridge_emul_init() with flags 2019-02-22 10:51:14 +00:00
pci-bridge-emul.h PCI: pci-bridge-emul: Extend pci_bridge_emul_init() with flags 2019-02-22 10:51:14 +00:00
pci-driver.c Printk changes for 5.2 2019-05-07 09:18:12 -07:00
pci-label.c
pci-mid.c x86/cpu: Sanitize FAM6_ATOM naming 2018-10-02 10:14:32 +02:00
pci-pf-stub.c
pci-stub.c PCI: Replace printk(KERN_INFO) with pr_info(), etc 2019-05-09 07:49:54 -05:00
pci-sysfs.c PCI: Use dev_printk() when possible 2019-05-09 07:49:49 -05:00
pci.c pci-v5.2-changes 2019-05-14 10:30:10 -07:00
pci.h pci-v5.2-changes 2019-05-14 10:30:10 -07:00
probe.c pci-v5.2-changes 2019-05-14 10:30:10 -07:00
proc.c PCI: Use seq_puts() instead of seq_printf() in show_device() 2019-07-02 18:38:51 -05:00
quirks.c PCI: Enable NVIDIA HDA controllers 2019-07-11 11:13:26 -05:00
remove.c PCI/ASPM: Fix link_state teardown on device removal 2018-09-17 16:32:23 -05:00
rom.c
search.c PCI: Add pci_dev_id() helper 2019-04-29 16:12:05 -05:00
setup-bus.c Merge branch 'pci/trivial' 2019-05-13 18:34:48 -05:00
setup-irq.c
setup-res.c
slot.c PCI: Replace printk(KERN_INFO) with pr_info(), etc 2019-05-09 07:49:54 -05:00
syscall.c
vc.c
vpd.c
xen-pcifront.c Merge branch 'pci/printk' 2019-05-13 18:34:46 -05:00