i3c: mipi-i3c-hci-pci: Enable IBI while runtime suspended for Intel controllers

Intel LPSS I3C controllers can wake from runtime suspend to receive
in-band interrupts (IBIs), and they also implement the MIPI I3C HCI
Multi-Bus Instance capability.  When multiple I3C bus instances share the
same PCI wakeup, the PCI parent must coordinate runtime PM so that all
instances suspend together and their mipi-i3c-hci runtime suspend
callbacks are invoked in a consistent manner.

Enable IBI-based wakeup by setting HCI_QUIRK_RPM_IBI_ALLOWED for the
intel-lpss-i3c platform device.  Also set HCI_QUIRK_RPM_PARENT_MANAGED so
that the mipi-i3c-hci core driver expects runtime PM to be controlled by
the PCI parent rather than by individual instances.  For all Intel HCI PCI
configurations, enable the corresponding control_instance_pm flag in the
PCI driver.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260306085338.62955-6-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: ahunter6

drivers/i3c/master/mipi-i3c-hci/core.c

@@ -1042,7 +1042,9 @@ static const struct acpi_device_id i3c_hci_acpi_match[] = {
 MODULE_DEVICE_TABLE(acpi, i3c_hci_acpi_match);
 
 static const struct platform_device_id i3c_hci_driver_ids[] = {
-	{ .name = "intel-lpss-i3c", HCI_QUIRK_RPM_ALLOWED },
+	{ .name = "intel-lpss-i3c", HCI_QUIRK_RPM_ALLOWED |
+				    HCI_QUIRK_RPM_IBI_ALLOWED |
+				    HCI_QUIRK_RPM_PARENT_MANAGED },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(platform, i3c_hci_driver_ids);

drivers/i3c/master/mipi-i3c-hci/mipi-i3c-hci-pci.c

@@ -200,6 +200,7 @@ static const struct mipi_i3c_hci_pci_info intel_mi_1_info = {
 	.id = {0, 1},
 	.instance_offset = {0, 0x400},
 	.instance_count = 2,
+	.control_instance_pm = true,
 };
 
 static const struct mipi_i3c_hci_pci_info intel_mi_2_info = {
@@ -209,6 +210,7 @@ static const struct mipi_i3c_hci_pci_info intel_mi_2_info = {
 	.id = {2, 3},
 	.instance_offset = {0, 0x400},
 	.instance_count = 2,
+	.control_instance_pm = true,
 };
 
 static const struct mipi_i3c_hci_pci_info intel_si_2_info = {
@@ -218,6 +220,7 @@ static const struct mipi_i3c_hci_pci_info intel_si_2_info = {
 	.id = {2},
 	.instance_offset = {0},
 	.instance_count = 1,
+	.control_instance_pm = true,
 };
 
 static int mipi_i3c_hci_pci_find_instance(struct mipi_i3c_hci_pci *hci, struct device *dev)