Displaying 3 results from an estimated 3 matches for "intel_broken_d3_bridges".
2019 Sep 27
2
[RFC PATCH] pci: prevent putting pcie devices into lower device states on certain intel bridges
...if the client device
+ * is put into D1/D2/D3hot before putting the client into D3cold via
+ * platform means (generally ACPI).
+ *
+ * skipping this makes runpm work perfectly fine on such devices.
+ *
+ * As far as we know only skylake and kaby lake SoCs are affected.
+ */
+static unsigned short intel_broken_d3_bridges[] = {
+ /* kbl */
+ 0x1901,
+};
+
+static inline bool intel_broken_pci_pm(struct pci_bus *bus)
+{
+ struct pci_dev *bridge;
+ int i;
+
+ if (!bus || !bus->self)
+ return false;
+
+ bridge = bus->self;
+ if (bridge->vendor != PCI_VENDOR_ID_INTEL)
+ return false;
+
+ for (i = 0; i < ARR...
2019 Sep 27
0
[RFC PATCH] pci: prevent putting pcie devices into lower device states on certain intel bridges
...t here, e.g., maybe we're
missing some delay like the ones Mika is adding to the reset paths?
> + *
> + * skipping this makes runpm work perfectly fine on such devices.
> + *
> + * As far as we know only skylake and kaby lake SoCs are affected.
> + */
> +static unsigned short intel_broken_d3_bridges[] = {
> + /* kbl */
> + 0x1901,
> +};
> +
> +static inline bool intel_broken_pci_pm(struct pci_bus *bus)
> +{
> + struct pci_dev *bridge;
> + int i;
> +
> + if (!bus || !bus->self)
> + return false;
> +
> + bridge = bus->self;
> + if (bridge->vend...
2019 Sep 27
2
[RFC PATCH] pci: prevent putting pcie devices into lower device states on certain intel bridges
...ck online (doing a rescan via
sysfs gets the device detected again)
> > + *
> > + * skipping this makes runpm work perfectly fine on such devices.
> > + *
> > + * As far as we know only skylake and kaby lake SoCs are affected.
> > + */
> > +static unsigned short intel_broken_d3_bridges[] = {
> > + /* kbl */
> > + 0x1901,
> > +};
> > +
> > +static inline bool intel_broken_pci_pm(struct pci_bus *bus)
> > +{
> > + struct pci_dev *bridge;
> > + int i;
> > +
> > + if (!bus || !bus->self)
> > +...