linux-kernel - Re: [PATCH] Revert "pinctrl: amd: Disable and mask interrupts on resume"

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Date:   Tue, 11 Apr 2023 08:51:45 -0500
From:   "Limonciello, Mario" <mario.limonciello@....com>
To:     Kornel Dulęba <korneld@...omium.org>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Basavaraj Natikar <Basavaraj.Natikar@....com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        upstream@...ihalf.com, rad@...ihalf.com, mattedavis@...gle.com,
        Gong Richard <richard.gong@....com>
Subject: Re: [PATCH] Revert "pinctrl: amd: Disable and mask interrupts on
 resume"

On 4/11/2023 08:49, Kornel Dulęba wrote:
> This reverts commit b26cd9325be4c1fcd331b77f10acb627c560d4d7.
> 
> This patch introduces a regression on Lenovo Z13, which can't wake
> from the lid with it applied; and some unspecified AMD based Dell
> platforms are unable to wake from hitting the power button
> 
> Signed-off-by: Kornel Dulęba <korneld@...omium.org>

Link: https://bugzilla.kernel.org/show_bug.cgi?id=217315
Reviewed-by: Mario Limonciello <mario.limonciello@....com>
Cc: stable@...r.kernel.org

> ---
>   drivers/pinctrl/pinctrl-amd.c | 36 ++++++++++++++++-------------------
>   1 file changed, 16 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-amd.c b/drivers/pinctrl/pinctrl-amd.c
> index 609821b756c2..9236a132c7ba 100644
> --- a/drivers/pinctrl/pinctrl-amd.c
> +++ b/drivers/pinctrl/pinctrl-amd.c
> @@ -872,34 +872,32 @@ static const struct pinconf_ops amd_pinconf_ops = {
>   	.pin_config_group_set = amd_pinconf_group_set,
>   };
>   
> -static void amd_gpio_irq_init_pin(struct amd_gpio *gpio_dev, int pin)
> +static void amd_gpio_irq_init(struct amd_gpio *gpio_dev)
>   {
> -	const struct pin_desc *pd;
> +	struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
>   	unsigned long flags;
>   	u32 pin_reg, mask;
> +	int i;
>   
>   	mask = BIT(WAKE_CNTRL_OFF_S0I3) | BIT(WAKE_CNTRL_OFF_S3) |
>   		BIT(INTERRUPT_MASK_OFF) | BIT(INTERRUPT_ENABLE_OFF) |
>   		BIT(WAKE_CNTRL_OFF_S4);
>   
> -	pd = pin_desc_get(gpio_dev->pctrl, pin);
> -	if (!pd)
> -		return;
> +	for (i = 0; i < desc->npins; i++) {
> +		int pin = desc->pins[i].number;
> +		const struct pin_desc *pd = pin_desc_get(gpio_dev->pctrl, pin);
>   
> -	raw_spin_lock_irqsave(&gpio_dev->lock, flags);
> -	pin_reg = readl(gpio_dev->base + pin * 4);
> -	pin_reg &= ~mask;
> -	writel(pin_reg, gpio_dev->base + pin * 4);
> -	raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
> -}
> +		if (!pd)
> +			continue;
>   
> -static void amd_gpio_irq_init(struct amd_gpio *gpio_dev)
> -{
> -	struct pinctrl_desc *desc = gpio_dev->pctrl->desc;
> -	int i;
> +		raw_spin_lock_irqsave(&gpio_dev->lock, flags);
>   
> -	for (i = 0; i < desc->npins; i++)
> -		amd_gpio_irq_init_pin(gpio_dev, i);
> +		pin_reg = readl(gpio_dev->base + i * 4);
> +		pin_reg &= ~mask;
> +		writel(pin_reg, gpio_dev->base + i * 4);
> +
> +		raw_spin_unlock_irqrestore(&gpio_dev->lock, flags);
> +	}
>   }
>   
>   #ifdef CONFIG_PM_SLEEP
> @@ -952,10 +950,8 @@ static int amd_gpio_resume(struct device *dev)
>   	for (i = 0; i < desc->npins; i++) {
>   		int pin = desc->pins[i].number;
>   
> -		if (!amd_gpio_should_save(gpio_dev, pin)) {
> -			amd_gpio_irq_init_pin(gpio_dev, pin);
> +		if (!amd_gpio_should_save(gpio_dev, pin))
>   			continue;
> -		}
>   
>   		raw_spin_lock_irqsave(&gpio_dev->lock, flags);
>   		gpio_dev->saved_regs[i] |= readl(gpio_dev->base + pin * 4) & PIN_IRQ_PENDING;