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* [PATCH 0/4] irqchip: qcom: pdc: Introduce irq_set_wake call
@ 2020-05-22 13:19 Maulik Shah
  2020-05-22 13:19 ` [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable Maulik Shah
                   ` (4 more replies)
  0 siblings, 5 replies; 9+ messages in thread
From: Maulik Shah @ 2020-05-22 13:19 UTC (permalink / raw)
  To: bjorn.andersson, maz, linus.walleij, swboyd, evgreen, mka
  Cc: linux-kernel, linux-arm-msm, linux-gpio, agross, tglx, jason,
	dianders, rnayak, ilina, lsrao, Maulik Shah

This series adds support to lazy disable pdc interrupt.

Some drivers using gpio interrupts want to configure gpio for wakeup using
enable_irq_wake() but during suspend entry disables irq and expects system
to resume when interrupt occurs. In the driver resume call interrupt is
re-enabled and removes wakeup capability using disable_irq_wake() one such
example is cros ec driver.

With [1] in documentation saying "An irq can be disabled with disable_irq()
and still wake the system as long as the irq has wake enabled".

The PDC IRQs are currently "unlazy disabled" (disable here means that it
will be masked in PDC & GIC HW GICD_ISENABLER, the moment driver invokes
disable_irq()) such IRQs can not wakeup from low power modes like suspend
to RAM since the driver chosen to disable this.

During suspend entry, no one re-enable/unmask in HW, even if its marked for
wakeup.

One solutions thought to address this problem was...During suspend entry at
last point, irq chip driver re-enable/unmask IRQs in HW that are marked for
wakeup. This was attemped in [2].

This series adds alternate solution to [2] by "lazy disable" IRQs in HW.
The genirq takes care of lazy disable in case if irqchip did not implement
irq_disable callback. Below is high level steps on how this works out..

a. During driver's disable_irq() call, IRQ will be marked disabled in SW
b. IRQ will still be enabled(read unmasked in HW)
c. The device then enters low power mode like suspend to RAM
d. The HW detects unmasked IRQs and wakesup the CPU
e. During resume after local_irq_enable() CPU goes to handle the wake IRQ
f. Generic handler comes to know that IRQ is disabled in SW
g. Generic handler marks IRQ as pending and now invokes mask callback
h. IRQ gets disabled/masked in HW now
i. When driver invokes enable_irq() the SW pending IRQ leads IRQ's handler
j. enable_irq() will again enable/unmask in HW

[1] https://www.spinics.net/lists/kernel/msg3398294.html
[2] https://patchwork.kernel.org/patch/11466021/

Maulik Shah (4):
  gpio: gpiolib: Allow GPIO IRQs to lazy disable
  pinctrl: qcom: Remove irq_disable callback from msmgpio irqchip
  pinctrl: qcom: Add msmgpio irqchip flags
  irqchip: qcom-pdc: Introduce irq_set_wake call

 drivers/gpio/gpiolib.c             | 59 ++++++++++++++++++++++++--------------
 drivers/irqchip/qcom-pdc.c         | 33 ++++++++++-----------
 drivers/pinctrl/qcom/pinctrl-msm.c | 15 ++--------
 include/linux/gpio/driver.h        | 13 +++++++++
 4 files changed, 70 insertions(+), 50 deletions(-)

-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable
  2020-05-22 13:19 [PATCH 0/4] irqchip: qcom: pdc: Introduce irq_set_wake call Maulik Shah
@ 2020-05-22 13:19 ` Maulik Shah
  2020-05-23  9:42   ` Marc Zyngier
  2020-05-23 12:30   ` kbuild test robot
  2020-05-22 13:19 ` [PATCH 2/4] pinctrl: qcom: Remove irq_disable callback from msmgpio irqchip Maulik Shah
                   ` (3 subsequent siblings)
  4 siblings, 2 replies; 9+ messages in thread
From: Maulik Shah @ 2020-05-22 13:19 UTC (permalink / raw)
  To: bjorn.andersson, maz, linus.walleij, swboyd, evgreen, mka
  Cc: linux-kernel, linux-arm-msm, linux-gpio, agross, tglx, jason,
	dianders, rnayak, ilina, lsrao, Maulik Shah

With 'commit 461c1a7d4733 ("gpiolib: override irq_enable/disable")' gpiolib
overrides irqchip's irq_enable and irq_disable callbacks. If irq_disable
callback is implemented then genirq takes unlazy path to disable irq.

Underlying irqchip may not want to implement irq_disable callback to lazy
disable irq when client drivers invokes disable_irq(). By overriding
irq_disable callback, gpiolib ends up always unlazy disabling IRQ.

Allow gpiolib to lazy disable IRQs by overriding irq_disable callback only
if irqchip implemented irq_disable. In cases where irq_disable is not
implemented irq_mask is overridden. Similarly override irq_enable callback
only if irqchip implemented irq_enable otherwise irq_unmask is overridden.

Fixes: 461c1a7d47 (gpiolib: override irq_enable/disable)
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
---
 drivers/gpio/gpiolib.c      | 59 +++++++++++++++++++++++++++++----------------
 include/linux/gpio/driver.h | 13 ++++++++++
 2 files changed, 51 insertions(+), 21 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index eaa0e20..a8fdc74 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2465,33 +2465,38 @@ static void gpiochip_irq_relres(struct irq_data *d)
 	gpiochip_relres_irq(gc, d->hwirq);
 }
 
+static void gpiochip_irq_mask(struct irq_data *d)
+{
+	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
+
+	if (chip->irq.irq_mask)
+		chip->irq.irq_mask(d);
+	gpiochip_disable_irq(chip, d->hwirq);
+}
+
+static void gpiochip_irq_unmask(struct irq_data *d)
+{
+	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
+
+	gpiochip_enable_irq(chip, d->hwirq);
+	if (chip->irq.irq_unmask)
+		chip->irq.irq_unmask(d);
+}
+
 static void gpiochip_irq_enable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 
-	gpiochip_enable_irq(gc, d->hwirq);
-	if (gc->irq.irq_enable)
-		gc->irq.irq_enable(d);
-	else
-		gc->irq.chip->irq_unmask(d);
+	gpiochip_enable_irq(chip, d->hwirq);
+	chip->irq.irq_enable(d);
 }
 
 static void gpiochip_irq_disable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 
-	/*
-	 * Since we override .irq_disable() we need to mimic the
-	 * behaviour of __irq_disable() in irq/chip.c.
-	 * First call .irq_disable() if it exists, else mimic the
-	 * behaviour of mask_irq() which calls .irq_mask() if
-	 * it exists.
-	 */
-	if (gc->irq.irq_disable)
-		gc->irq.irq_disable(d);
-	else if (gc->irq.chip->irq_mask)
-		gc->irq.chip->irq_mask(d);
-	gpiochip_disable_irq(gc, d->hwirq);
+	chip->irq.irq_disable(d);
+	gpiochip_disable_irq(chip, d->hwirq);
 }
 
 static void gpiochip_set_irq_hooks(struct gpio_chip *gc)
@@ -2515,10 +2520,22 @@ static void gpiochip_set_irq_hooks(struct gpio_chip *gc)
 			  "detected irqchip that is shared with multiple gpiochips: please fix the driver.\n");
 		return;
 	}
-	gc->irq.irq_enable = irqchip->irq_enable;
-	gc->irq.irq_disable = irqchip->irq_disable;
-	irqchip->irq_enable = gpiochip_irq_enable;
-	irqchip->irq_disable = gpiochip_irq_disable;
+
+	if (irqchip->irq_disable) {
+		gpiochip->irq.irq_disable = irqchip->irq_disable;
+		irqchip->irq_disable = gpiochip_irq_disable;
+	} else {
+		gpiochip->irq.irq_mask = irqchip->irq_mask;
+		irqchip->irq_mask = gpiochip_irq_mask;
+	}
+
+	if (irqchip->irq_enable) {
+		gpiochip->irq.irq_enable = irqchip->irq_enable;
+		irqchip->irq_enable = gpiochip_irq_enable;
+	} else {
+		gpiochip->irq.irq_unmask = irqchip->irq_unmask;
+		irqchip->irq_unmask = gpiochip_irq_unmask;
+	}
 }
 
 /**
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 8c41ae4..c8bcaf3 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -253,6 +253,19 @@ struct gpio_irq_chip {
 	 * Store old irq_chip irq_disable callback
 	 */
 	void		(*irq_disable)(struct irq_data *data);
+	/**
+	 * @irq_unmask:
+	 *
+	 * Store old irq_chip irq_unmask callback
+	 */
+	void		(*irq_unmask)(struct irq_data *data);
+
+	/**
+	 * @irq_mask:
+	 *
+	 * Store old irq_chip irq_mask callback
+	 */
+	void		(*irq_mask)(struct irq_data *data);
 };
 
 /**
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 2/4] pinctrl: qcom: Remove irq_disable callback from msmgpio irqchip
  2020-05-22 13:19 [PATCH 0/4] irqchip: qcom: pdc: Introduce irq_set_wake call Maulik Shah
  2020-05-22 13:19 ` [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable Maulik Shah
@ 2020-05-22 13:19 ` Maulik Shah
  2020-05-22 13:19 ` [PATCH 3/4] pinctrl: qcom: Add msmgpio irqchip flags Maulik Shah
                   ` (2 subsequent siblings)
  4 siblings, 0 replies; 9+ messages in thread
From: Maulik Shah @ 2020-05-22 13:19 UTC (permalink / raw)
  To: bjorn.andersson, maz, linus.walleij, swboyd, evgreen, mka
  Cc: linux-kernel, linux-arm-msm, linux-gpio, agross, tglx, jason,
	dianders, rnayak, ilina, lsrao, Maulik Shah

The gpio can be marked for wakeup and drivers can invoke disable_irq()
during suspend, in such cases unlazy approach will also disable at HW
and such gpios will not wakeup device from suspend to RAM.

Remove irq_disable callback to allow gpio interrupts to lazy disabled.
The gpio interrupts will get disabled during irq_mask callback.

Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
---
 drivers/pinctrl/qcom/pinctrl-msm.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 83b7d64..2419023 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -815,18 +815,6 @@ static void msm_gpio_irq_enable(struct irq_data *d)
 	msm_gpio_irq_clear_unmask(d, true);
 }
 
-static void msm_gpio_irq_disable(struct irq_data *d)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
-	struct msm_pinctrl *pctrl = gpiochip_get_data(gc);
-
-	if (d->parent_data)
-		irq_chip_disable_parent(d);
-
-	if (!test_bit(d->hwirq, pctrl->skip_wake_irqs))
-		msm_gpio_irq_mask(d);
-}
-
 static void msm_gpio_irq_unmask(struct irq_data *d)
 {
 	msm_gpio_irq_clear_unmask(d, false);
@@ -1146,7 +1134,6 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
 
 	pctrl->irq_chip.name = "msmgpio";
 	pctrl->irq_chip.irq_enable = msm_gpio_irq_enable;
-	pctrl->irq_chip.irq_disable = msm_gpio_irq_disable;
 	pctrl->irq_chip.irq_mask = msm_gpio_irq_mask;
 	pctrl->irq_chip.irq_unmask = msm_gpio_irq_unmask;
 	pctrl->irq_chip.irq_ack = msm_gpio_irq_ack;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 3/4] pinctrl: qcom: Add msmgpio irqchip flags
  2020-05-22 13:19 [PATCH 0/4] irqchip: qcom: pdc: Introduce irq_set_wake call Maulik Shah
  2020-05-22 13:19 ` [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable Maulik Shah
  2020-05-22 13:19 ` [PATCH 2/4] pinctrl: qcom: Remove irq_disable callback from msmgpio irqchip Maulik Shah
@ 2020-05-22 13:19 ` Maulik Shah
  2020-05-22 13:19 ` [PATCH 4/4] irqchip: qcom-pdc: Introduce irq_set_wake call Maulik Shah
  2020-05-25 11:34 ` [PATCH 0/4] irqchip: qcom: pdc: " Linus Walleij
  4 siblings, 0 replies; 9+ messages in thread
From: Maulik Shah @ 2020-05-22 13:19 UTC (permalink / raw)
  To: bjorn.andersson, maz, linus.walleij, swboyd, evgreen, mka
  Cc: linux-kernel, linux-arm-msm, linux-gpio, agross, tglx, jason,
	dianders, rnayak, ilina, lsrao, Maulik Shah

Add irqchip specific flags for msmgpio irqchip to mask non wakeirqs
during suspend and mask before setting irq type.

Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
---
 drivers/pinctrl/qcom/pinctrl-msm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 2419023..b909ffe 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -1143,6 +1143,8 @@ static int msm_gpio_init(struct msm_pinctrl *pctrl)
 	pctrl->irq_chip.irq_release_resources = msm_gpio_irq_relres;
 	pctrl->irq_chip.irq_set_affinity = msm_gpio_irq_set_affinity;
 	pctrl->irq_chip.irq_set_vcpu_affinity = msm_gpio_irq_set_vcpu_affinity;
+	pctrl->irq_chip.flags = IRQCHIP_MASK_ON_SUSPEND
+				| IRQCHIP_SET_TYPE_MASKED;
 
 	np = of_parse_phandle(pctrl->dev->of_node, "wakeup-parent", 0);
 	if (np) {
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation


^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 4/4] irqchip: qcom-pdc: Introduce irq_set_wake call
  2020-05-22 13:19 [PATCH 0/4] irqchip: qcom: pdc: Introduce irq_set_wake call Maulik Shah
                   ` (2 preceding siblings ...)
  2020-05-22 13:19 ` [PATCH 3/4] pinctrl: qcom: Add msmgpio irqchip flags Maulik Shah
@ 2020-05-22 13:19 ` Maulik Shah
  2020-05-25 11:34 ` [PATCH 0/4] irqchip: qcom: pdc: " Linus Walleij
  4 siblings, 0 replies; 9+ messages in thread
From: Maulik Shah @ 2020-05-22 13:19 UTC (permalink / raw)
  To: bjorn.andersson, maz, linus.walleij, swboyd, evgreen, mka
  Cc: linux-kernel, linux-arm-msm, linux-gpio, agross, tglx, jason,
	dianders, rnayak, ilina, lsrao, Maulik Shah

Remove irq_disable callback to allow lazy disable for pdc interrupts.

Add irq_set_wake callback that unmask interrupt in HW when drivers
mark interrupt for wakeup. Interrupt will be cleared in HW during
lazy disable if its not marked for wakeup.

Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
---
 drivers/irqchip/qcom-pdc.c | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c
index 6ae9e1f..f7c0662 100644
--- a/drivers/irqchip/qcom-pdc.c
+++ b/drivers/irqchip/qcom-pdc.c
@@ -36,6 +36,7 @@ struct pdc_pin_region {
 	u32 cnt;
 };
 
+DECLARE_BITMAP(pdc_wake_irqs, PDC_MAX_IRQS);
 static DEFINE_RAW_SPINLOCK(pdc_lock);
 static void __iomem *pdc_base;
 static struct pdc_pin_region *pdc_region;
@@ -87,22 +88,20 @@ static void pdc_enable_intr(struct irq_data *d, bool on)
 	raw_spin_unlock(&pdc_lock);
 }
 
-static void qcom_pdc_gic_disable(struct irq_data *d)
+static int qcom_pdc_gic_set_wake(struct irq_data *d, unsigned int on)
 {
 	if (d->hwirq == GPIO_NO_WAKE_IRQ)
-		return;
-
-	pdc_enable_intr(d, false);
-	irq_chip_disable_parent(d);
-}
+		return 0;
 
-static void qcom_pdc_gic_enable(struct irq_data *d)
-{
-	if (d->hwirq == GPIO_NO_WAKE_IRQ)
-		return;
+	if (on) {
+		pdc_enable_intr(d, true);
+		irq_chip_enable_parent(d);
+		set_bit(d->hwirq, pdc_wake_irqs);
+	} else {
+		clear_bit(d->hwirq, pdc_wake_irqs);
+	}
 
-	pdc_enable_intr(d, true);
-	irq_chip_enable_parent(d);
+	return irq_chip_set_wake_parent(d, on);
 }
 
 static void qcom_pdc_gic_mask(struct irq_data *d)
@@ -110,6 +109,9 @@ static void qcom_pdc_gic_mask(struct irq_data *d)
 	if (d->hwirq == GPIO_NO_WAKE_IRQ)
 		return;
 
+	if (!test_bit(d->hwirq, pdc_wake_irqs))
+		pdc_enable_intr(d, false);
+
 	irq_chip_mask_parent(d);
 }
 
@@ -118,6 +120,7 @@ static void qcom_pdc_gic_unmask(struct irq_data *d)
 	if (d->hwirq == GPIO_NO_WAKE_IRQ)
 		return;
 
+	pdc_enable_intr(d, true);
 	irq_chip_unmask_parent(d);
 }
 
@@ -197,15 +200,13 @@ static struct irq_chip qcom_pdc_gic_chip = {
 	.irq_eoi		= irq_chip_eoi_parent,
 	.irq_mask		= qcom_pdc_gic_mask,
 	.irq_unmask		= qcom_pdc_gic_unmask,
-	.irq_disable		= qcom_pdc_gic_disable,
-	.irq_enable		= qcom_pdc_gic_enable,
 	.irq_get_irqchip_state	= qcom_pdc_gic_get_irqchip_state,
 	.irq_set_irqchip_state	= qcom_pdc_gic_set_irqchip_state,
 	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 	.irq_set_type		= qcom_pdc_gic_set_type,
+	.irq_set_wake		= qcom_pdc_gic_set_wake,
 	.flags			= IRQCHIP_MASK_ON_SUSPEND |
-				  IRQCHIP_SET_TYPE_MASKED |
-				  IRQCHIP_SKIP_SET_WAKE,
+				  IRQCHIP_SET_TYPE_MASKED,
 	.irq_set_vcpu_affinity	= irq_chip_set_vcpu_affinity_parent,
 	.irq_set_affinity	= irq_chip_set_affinity_parent,
 };
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable
  2020-05-22 13:19 ` [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable Maulik Shah
@ 2020-05-23  9:42   ` Marc Zyngier
  2020-05-23 17:06     ` Maulik Shah
  2020-05-23 12:30   ` kbuild test robot
  1 sibling, 1 reply; 9+ messages in thread
From: Marc Zyngier @ 2020-05-23  9:42 UTC (permalink / raw)
  To: Maulik Shah
  Cc: bjorn.andersson, linus.walleij, swboyd, evgreen, mka,
	linux-kernel, linux-arm-msm, linux-gpio, agross, tglx, jason,
	dianders, rnayak, ilina, lsrao

On 2020-05-22 14:19, Maulik Shah wrote:
> With 'commit 461c1a7d4733 ("gpiolib: override irq_enable/disable")' 
> gpiolib
> overrides irqchip's irq_enable and irq_disable callbacks. If 
> irq_disable
> callback is implemented then genirq takes unlazy path to disable irq.
> 
> Underlying irqchip may not want to implement irq_disable callback to 
> lazy
> disable irq when client drivers invokes disable_irq(). By overriding
> irq_disable callback, gpiolib ends up always unlazy disabling IRQ.
> 
> Allow gpiolib to lazy disable IRQs by overriding irq_disable callback 
> only
> if irqchip implemented irq_disable. In cases where irq_disable is not
> implemented irq_mask is overridden. Similarly override irq_enable 
> callback
> only if irqchip implemented irq_enable otherwise irq_unmask is 
> overridden.
> 
> Fixes: 461c1a7d47 (gpiolib: override irq_enable/disable)
> Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
> ---
>  drivers/gpio/gpiolib.c      | 59 
> +++++++++++++++++++++++++++++----------------
>  include/linux/gpio/driver.h | 13 ++++++++++
>  2 files changed, 51 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index eaa0e20..a8fdc74 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -2465,33 +2465,38 @@ static void gpiochip_irq_relres(struct irq_data 
> *d)
>  	gpiochip_relres_irq(gc, d->hwirq);
>  }
> 
> +static void gpiochip_irq_mask(struct irq_data *d)
> +{
> +	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
> +
> +	if (chip->irq.irq_mask)
> +		chip->irq.irq_mask(d);
> +	gpiochip_disable_irq(chip, d->hwirq);
> +}
> +
> +static void gpiochip_irq_unmask(struct irq_data *d)
> +{
> +	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
> +
> +	gpiochip_enable_irq(chip, d->hwirq);
> +	if (chip->irq.irq_unmask)
> +		chip->irq.irq_unmask(d);
> +}
> +
>  static void gpiochip_irq_enable(struct irq_data *d)
>  {
>  	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
> 
> -	gpiochip_enable_irq(gc, d->hwirq);
> -	if (gc->irq.irq_enable)
> -		gc->irq.irq_enable(d);
> -	else
> -		gc->irq.chip->irq_unmask(d);
> +	gpiochip_enable_irq(chip, d->hwirq);

You really never compiled this, did you?

I've stopped looking at this. Please send something that you will have 
actually tested.

         M.
-- 
Jazz is not dead. It just smells funny...

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable
  2020-05-22 13:19 ` [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable Maulik Shah
  2020-05-23  9:42   ` Marc Zyngier
@ 2020-05-23 12:30   ` kbuild test robot
  1 sibling, 0 replies; 9+ messages in thread
From: kbuild test robot @ 2020-05-23 12:30 UTC (permalink / raw)
  To: Maulik Shah, bjorn.andersson, maz, linus.walleij, swboyd, evgreen, mka
  Cc: kbuild-all, clang-built-linux, linux-kernel, linux-arm-msm,
	linux-gpio, agross, tglx, jason, dianders, rnayak, ilina


[-- Attachment #1: Type: text/plain, Size: 4406 bytes --]

Hi Maulik,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on gpio/for-next]
[also build test ERROR on pinctrl/devel v5.7-rc6 next-20200522]
[cannot apply to tip/irq/core]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Maulik-Shah/irqchip-qcom-pdc-Introduce-irq_set_wake-call/20200522-212226
base:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git for-next
config: x86_64-randconfig-a013-20200521 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/gpio/gpiolib.c:2490:22: error: use of undeclared identifier 'chip'
gpiochip_enable_irq(chip, d->hwirq);
^
drivers/gpio/gpiolib.c:2491:2: error: use of undeclared identifier 'chip'
chip->irq.irq_enable(d);
^
drivers/gpio/gpiolib.c:2498:2: error: use of undeclared identifier 'chip'
chip->irq.irq_disable(d);
^
drivers/gpio/gpiolib.c:2499:23: error: use of undeclared identifier 'chip'
gpiochip_disable_irq(chip, d->hwirq);
^
>> drivers/gpio/gpiolib.c:2525:3: error: use of undeclared identifier 'gpiochip'
gpiochip->irq.irq_disable = irqchip->irq_disable;
^
drivers/gpio/gpiolib.c:2528:3: error: use of undeclared identifier 'gpiochip'
gpiochip->irq.irq_mask = irqchip->irq_mask;
^
drivers/gpio/gpiolib.c:2533:3: error: use of undeclared identifier 'gpiochip'
gpiochip->irq.irq_enable = irqchip->irq_enable;
^
drivers/gpio/gpiolib.c:2536:3: error: use of undeclared identifier 'gpiochip'
gpiochip->irq.irq_unmask = irqchip->irq_unmask;
^
8 errors generated.

vim +/chip +2490 drivers/gpio/gpiolib.c

  2485	
  2486	static void gpiochip_irq_enable(struct irq_data *d)
  2487	{
  2488		struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
  2489	
> 2490		gpiochip_enable_irq(chip, d->hwirq);
  2491		chip->irq.irq_enable(d);
  2492	}
  2493	
  2494	static void gpiochip_irq_disable(struct irq_data *d)
  2495	{
  2496		struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
  2497	
  2498		chip->irq.irq_disable(d);
  2499		gpiochip_disable_irq(chip, d->hwirq);
  2500	}
  2501	
  2502	static void gpiochip_set_irq_hooks(struct gpio_chip *gc)
  2503	{
  2504		struct irq_chip *irqchip = gc->irq.chip;
  2505	
  2506		if (!irqchip->irq_request_resources &&
  2507		    !irqchip->irq_release_resources) {
  2508			irqchip->irq_request_resources = gpiochip_irq_reqres;
  2509			irqchip->irq_release_resources = gpiochip_irq_relres;
  2510		}
  2511		if (WARN_ON(gc->irq.irq_enable))
  2512			return;
  2513		/* Check if the irqchip already has this hook... */
  2514		if (irqchip->irq_enable == gpiochip_irq_enable) {
  2515			/*
  2516			 * ...and if so, give a gentle warning that this is bad
  2517			 * practice.
  2518			 */
  2519			chip_info(gc,
  2520				  "detected irqchip that is shared with multiple gpiochips: please fix the driver.\n");
  2521			return;
  2522		}
  2523	
  2524		if (irqchip->irq_disable) {
> 2525			gpiochip->irq.irq_disable = irqchip->irq_disable;
  2526			irqchip->irq_disable = gpiochip_irq_disable;
  2527		} else {
  2528			gpiochip->irq.irq_mask = irqchip->irq_mask;
  2529			irqchip->irq_mask = gpiochip_irq_mask;
  2530		}
  2531	
  2532		if (irqchip->irq_enable) {
  2533			gpiochip->irq.irq_enable = irqchip->irq_enable;
  2534			irqchip->irq_enable = gpiochip_irq_enable;
  2535		} else {
  2536			gpiochip->irq.irq_unmask = irqchip->irq_unmask;
  2537			irqchip->irq_unmask = gpiochip_irq_unmask;
  2538		}
  2539	}
  2540	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 35639 bytes --]

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable
  2020-05-23  9:42   ` Marc Zyngier
@ 2020-05-23 17:06     ` Maulik Shah
  0 siblings, 0 replies; 9+ messages in thread
From: Maulik Shah @ 2020-05-23 17:06 UTC (permalink / raw)
  To: Marc Zyngier
  Cc: bjorn.andersson, linus.walleij, swboyd, evgreen, mka,
	linux-kernel, linux-arm-msm, linux-gpio, agross, tglx, jason,
	dianders, rnayak, ilina, lsrao

Hi,

On 5/23/2020 3:12 PM, Marc Zyngier wrote:
> On 2020-05-22 14:19, Maulik Shah wrote:
>> With 'commit 461c1a7d4733 ("gpiolib: override irq_enable/disable")' 
>> gpiolib
>> overrides irqchip's irq_enable and irq_disable callbacks. If irq_disable
>> callback is implemented then genirq takes unlazy path to disable irq.
>>
>> Underlying irqchip may not want to implement irq_disable callback to 
>> lazy
>> disable irq when client drivers invokes disable_irq(). By overriding
>> irq_disable callback, gpiolib ends up always unlazy disabling IRQ.
>>
>> Allow gpiolib to lazy disable IRQs by overriding irq_disable callback 
>> only
>> if irqchip implemented irq_disable. In cases where irq_disable is not
>> implemented irq_mask is overridden. Similarly override irq_enable 
>> callback
>> only if irqchip implemented irq_enable otherwise irq_unmask is 
>> overridden.
>>
>> Fixes: 461c1a7d47 (gpiolib: override irq_enable/disable)
>> Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
>> ---
>>  drivers/gpio/gpiolib.c      | 59 
>> +++++++++++++++++++++++++++++----------------
>>  include/linux/gpio/driver.h | 13 ++++++++++
>>  2 files changed, 51 insertions(+), 21 deletions(-)
>>
>> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
>> index eaa0e20..a8fdc74 100644
>> --- a/drivers/gpio/gpiolib.c
>> +++ b/drivers/gpio/gpiolib.c
>> @@ -2465,33 +2465,38 @@ static void gpiochip_irq_relres(struct 
>> irq_data *d)
>>      gpiochip_relres_irq(gc, d->hwirq);
>>  }
>>
>> +static void gpiochip_irq_mask(struct irq_data *d)
>> +{
>> +    struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
>> +
>> +    if (chip->irq.irq_mask)
>> +        chip->irq.irq_mask(d);
>> +    gpiochip_disable_irq(chip, d->hwirq);
>> +}
>> +
>> +static void gpiochip_irq_unmask(struct irq_data *d)
>> +{
>> +    struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
>> +
>> +    gpiochip_enable_irq(chip, d->hwirq);
>> +    if (chip->irq.irq_unmask)
>> +        chip->irq.irq_unmask(d);
>> +}
>> +
>>  static void gpiochip_irq_enable(struct irq_data *d)
>>  {
>>      struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
>>
>> -    gpiochip_enable_irq(gc, d->hwirq);
>> -    if (gc->irq.irq_enable)
>> -        gc->irq.irq_enable(d);
>> -    else
>> -        gc->irq.chip->irq_unmask(d);
>> +    gpiochip_enable_irq(chip, d->hwirq);
>
> You really never compiled this, did you?
>
> I've stopped looking at this. Please send something that you will have 
> actually tested.
>
>         M.

Apologies.

I did tested out on internal devices based on kernel 5.4 as well as 
linux-next with sc7180.

While posting i somehow taken patch from kernel 5.4 and messed up this 
patch during merge conflicts.

I fixed this in v2 and posted out changes that cleanly applies on latest 
linux-next tag (next-20200521).

Thanks,
Maulik

-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation


^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH 0/4] irqchip: qcom: pdc: Introduce irq_set_wake call
  2020-05-22 13:19 [PATCH 0/4] irqchip: qcom: pdc: Introduce irq_set_wake call Maulik Shah
                   ` (3 preceding siblings ...)
  2020-05-22 13:19 ` [PATCH 4/4] irqchip: qcom-pdc: Introduce irq_set_wake call Maulik Shah
@ 2020-05-25 11:34 ` Linus Walleij
  4 siblings, 0 replies; 9+ messages in thread
From: Linus Walleij @ 2020-05-25 11:34 UTC (permalink / raw)
  To: Maulik Shah
  Cc: Bjorn Andersson, Marc Zyngier, Stephen Boyd, Evan Green,
	Matthias Kaehlcke, linux-kernel, MSM, open list:GPIO SUBSYSTEM,
	Andy Gross, Thomas Gleixner, Jason Cooper, Doug Anderson,
	Rajendra Nayak, Lina Iyer, lsrao

On Fri, May 22, 2020 at 3:20 PM Maulik Shah <mkshah@codeaurora.org> wrote:

>   pinctrl: qcom: Remove irq_disable callback from msmgpio irqchip
>   pinctrl: qcom: Add msmgpio irqchip flags

For these two:
Acked-by: Linus Walleij <linus.walleij@linaro.org>
so the irqchip maintainers can merge them.

But you ideally also need Björn's ACKs.

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, back to index

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-22 13:19 [PATCH 0/4] irqchip: qcom: pdc: Introduce irq_set_wake call Maulik Shah
2020-05-22 13:19 ` [PATCH 1/4] gpio: gpiolib: Allow GPIO IRQs to lazy disable Maulik Shah
2020-05-23  9:42   ` Marc Zyngier
2020-05-23 17:06     ` Maulik Shah
2020-05-23 12:30   ` kbuild test robot
2020-05-22 13:19 ` [PATCH 2/4] pinctrl: qcom: Remove irq_disable callback from msmgpio irqchip Maulik Shah
2020-05-22 13:19 ` [PATCH 3/4] pinctrl: qcom: Add msmgpio irqchip flags Maulik Shah
2020-05-22 13:19 ` [PATCH 4/4] irqchip: qcom-pdc: Introduce irq_set_wake call Maulik Shah
2020-05-25 11:34 ` [PATCH 0/4] irqchip: qcom: pdc: " Linus Walleij

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	git clone --mirror https://lore.kernel.org/linux-gpio/0 linux-gpio/git/0.git

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	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-gpio linux-gpio/ https://lore.kernel.org/linux-gpio \
		linux-gpio@vger.kernel.org
	public-inbox-index linux-gpio

Example config snippet for mirrors

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