diff mbox series

[v3,01/11] PCI: Update current bus speed as part of pci_pwrctrl_notify()

Message ID 20250519-mhi_bw_up-v3-1-3acd4a17bbb5@oss.qualcomm.com
State New
Headers show
Series bus: mhi: host: Add support for mhi bus bw | expand

Commit Message

Krishna Chaitanya Chundru May 19, 2025, 9:42 a.m. UTC 
If the link is not up till the pwrctl drivers enable power to endpoints
then cur_bus_speed will not be updated with correct speed.

As part of rescan, pci_pwrctrl_notify() will be called when new devices
are added and as part of it update the link bus speed.

Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
---
 drivers/pci/pwrctrl/core.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/pwrctrl/core.c b/drivers/pci/pwrctrl/core.c
index 9cc7e2b7f2b5608ee67c838b6500b2ae4a07ad52..034f0a5d7868fe956e3fc6a9b7ed485bb69caa04 100644
--- a/drivers/pci/pwrctrl/core.c
+++ b/drivers/pci/pwrctrl/core.c
@@ -10,16 +10,21 @@ 
 #include <linux/pci-pwrctrl.h>
 #include <linux/property.h>
 #include <linux/slab.h>
+#include "../pci.h"
 
 static int pci_pwrctrl_notify(struct notifier_block *nb, unsigned long action,
 			      void *data)
 {
 	struct pci_pwrctrl *pwrctrl = container_of(nb, struct pci_pwrctrl, nb);
 	struct device *dev = data;
+	struct pci_bus *bus = to_pci_dev(dev)->bus;
 
 	if (dev_fwnode(dev) != dev_fwnode(pwrctrl->dev))
 		return NOTIFY_DONE;
 
+	if (bus->self)
+		pcie_update_link_speed((struct pci_bus *)bus);
+
 	switch (action) {
 	case BUS_NOTIFY_ADD_DEVICE:
 		/*