Re: [PATCH v10 6/6] usb: dwc3: qcom: Enable the interrupts during probe

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Hi Pavan,

On 1/18/2022 3:22 PM, Pavan Kondeti wrote:
On Tue, Jan 18, 2022 at 12:12:30AM -0600, Steev Klimaszewski wrote:
On 1/16/22 11:44 PM, Sandeep Maheswaram wrote:
Enable the interrupts during probe and remove the disable interrupts
function.

Signed-off-by: Sandeep Maheswaram <quic_c_sanm@xxxxxxxxxxx>
---
  drivers/usb/dwc3/dwc3-qcom.c | 28 ++++------------------------
  1 file changed, 4 insertions(+), 24 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 54dc3d3..7c5e636 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -306,25 +306,7 @@ static void dwc3_qcom_enable_wakeup_irq(int irq)
  	enable_irq_wake(irq);
  }
-static void dwc3_qcom_disable_wakeup_irq(int irq)
-{
-	if (!irq)
-		return;
-
-	disable_irq_wake(irq);
-	disable_irq_nosync(irq);
-}
-static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
-{
-	dwc3_qcom_disable_wakeup_irq(qcom->hs_phy_irq);
-
-	dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
-
-	dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
-
-	dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq);
-}
  static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
  {
@@ -356,9 +338,6 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom)
  	if (ret)
  		dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret);
-	if (device_may_wakeup(qcom->dev))
-		dwc3_qcom_enable_interrupts(qcom);
-
  	qcom->is_suspended = true;
  	return 0;
@@ -372,9 +351,6 @@ static int dwc3_qcom_resume(struct dwc3_qcom *qcom)
  	if (!qcom->is_suspended)
  		return 0;
-	if (device_may_wakeup(qcom->dev))
-		dwc3_qcom_disable_interrupts(qcom);
-
  	for (i = 0; i < qcom->num_clocks; i++) {
  		ret = clk_prepare_enable(qcom->clks[i]);
  		if (ret < 0) {
@@ -832,6 +808,10 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
  	genpd->flags |= GENPD_FLAG_ALWAYS_ON;
  	device_init_wakeup(&pdev->dev, 1);
+
+	if (device_may_wakeup(qcom->dev))
+		dwc3_qcom_enable_interrupts(qcom);
+
  	qcom->is_suspended = false;
  	pm_runtime_set_active(dev);
  	pm_runtime_enable(dev);
Hi Sandeep,

I was testing this series on my Lenovo Yoga C630, and with this patch in
particular applied, my system will no longer boot. Unfortunately I don't get
any sort of good output at all, I just get hung tasks when trying to probe
things it would seem.


With the other 5 patches in the series applied, the system still boots and
works correctly.


Sandeep,

Enable DP/DM interrupts all the time might be creating a storm of interrupts.
calling enable_irq_wake() during probe is okay, but not the enable_irq().

Did you verify your change with a Highspeed/Fullspeed device connected?

Thanks,
Pavan

I didn't face any such issue with devices connected.

I think this is because I used IRQ_TYPE_EDGE_BOTH in device tree and Steev has IRQ_TYPE_LEVEL_HIGH in his device tree.

When i changed to IRQ_TYPE_LEVEL_HIGH I also observed a storm of interrupts in my device though it booted .

Regards

Sandeep




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