On 5/6/2022 4:18 AM, Matthias Kaehlcke wrote:
On Thu, May 05, 2022 at 02:26:10PM +0530, Krishna Kurapati wrote:
From: Sandeep Maheswaram <quic_c_sanm@xxxxxxxxxxx>
During suspend read the status of all port and set hs phy mode
based on current speed. Use this hs phy mode to configure wakeup
interrupts in qcom glue driver.
Check wakeup-source property for dwc3 core node to set the
wakeup capability. Drop the device_init_wakeup call from
runtime suspend and resume.
Also check during suspend if any wakeup capable devices are
connected to the controller (directly or through hubs), if there
are none set a flag to indicate that the PHY is powered
down during suspend.
Signed-off-by: Sandeep Maheswaram <quic_c_sanm@xxxxxxxxxxx>
Signed-off-by: Krishna Kurapati <quic_kriskura@xxxxxxxxxxx>
---
drivers/usb/dwc3/core.c | 33 ++++++++++++++++++++-------------
drivers/usb/dwc3/core.h | 4 ++++
drivers/usb/dwc3/host.c | 24 ++++++++++++++++++++++++
3 files changed, 48 insertions(+), 13 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 950e238..cf377f5 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -33,6 +33,7 @@
#include <linux/usb/gadget.h>
#include <linux/usb/of.h>
#include <linux/usb/otg.h>
+#include <linux/usb/hcd.h>
This is not needed anymore
#include "core.h"
#include "gadget.h"
@@ -1787,6 +1788,7 @@ static int dwc3_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dwc);
dwc3_cache_hwparams(dwc);
+ device_init_wakeup(&pdev->dev, of_property_read_bool(dev->of_node, "wakeup-source"));
spin_lock_init(&dwc->lock);
mutex_init(&dwc->mutex);
@@ -1936,6 +1938,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
{
unsigned long flags;
u32 reg;
+ struct usb_hcd *hcd = platform_get_drvdata(dwc->xhci);
This isn't used anymore, delete it
My bad, Will fix this in next version.
switch (dwc->current_dr_role) {
case DWC3_GCTL_PRTCAP_DEVICE:
@@ -1948,10 +1951,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
dwc3_core_exit(dwc);
break;
case DWC3_GCTL_PRTCAP_HOST:
- if (!PMSG_IS_AUTO(msg)) {
- dwc3_core_exit(dwc);
- break;
- }
+ dwc3_check_phy_speed_mode(dwc);
/* Let controller to suspend HSPHY before PHY driver suspends */
if (dwc->dis_u2_susphy_quirk ||
@@ -1967,6 +1967,16 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
phy_pm_runtime_put_sync(dwc->usb2_generic_phy);
phy_pm_runtime_put_sync(dwc->usb3_generic_phy);
+
+ if (!PMSG_IS_AUTO(msg)) {
+ if (device_may_wakeup(dwc->dev) &&
+ device_wakeup_path(dwc->dev)) {
nit: the indentation is odd, align it with device_may_wakeup()?
Sure, Will take care of it.
+ dwc->phy_power_off = false;
+ } else {
+ dwc->phy_power_off = true;
+ dwc3_core_exit(dwc);
As commented earlier, taking the controller and PHYs completely down causes a
significant power draw in some USB clients. Let's clarify what the specific
benefits are of doing dwc3_core_exit() vs. entering a low power mode.
Sure, once we come to a conclusion on this, I will refresh the patches.
