linux-kernel - Re: [PATCH 2/2] soundwire: amd: fix for wake interrupt handling for clockstop mode

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Date: Thu, 28 Mar 2024 23:41:44 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Vijendar Mukunda <Vijendar.Mukunda@....com>
Cc: broonie@...nel.org, alsa-devel@...a-project.org,
	pierre-louis.bossart@...ux.intel.com, Basavaraj.Hiregoudar@....com,
	Sunil-kumar.Dommati@....com, venkataprasad.potturu@....com,
	Bard Liao <yung-chuan.liao@...ux.intel.com>,
	Sanyog Kale <sanyog.r.kale@...el.com>,
	Mastan Katragadda <Mastan.Katragadda@....com>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] soundwire: amd: fix for wake interrupt handling for
 clockstop mode

On 27-03-24, 12:01, Vijendar Mukunda wrote:
> When SoundWire Wake interrupt is enabled along with SoundWire Wake
> enable register, SoundWire wake interrupt will be reported
> when SoundWire manager is in D3 state and ACP is in D3 state.
> 
> When SoundWire Wake interrupt is reported, it will invoke runtime
> resume of the SoundWire manager device.
> 
> In case of system level suspend, for ClockStop Mode SoundWire Wake
> interrupt should be disabled.
> It should be enabled only for runtime suspend scenario.
> Change wake interrupt enable/disable sequence for ClockStop Mode in
> system level suspend and runtime suspend sceanrio.
> 
> Fixes: 9cf1efc5ed2d ("soundwire: amd: add pm_prepare callback and pm ops support")
> 

no empty line b/w fixes and s-o-b line please

I have fixed it up while applying
Also, fixes should be first patch followed by other changes...

> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
> ---
>  drivers/soundwire/amd_manager.c | 15 +++++++++++++++
>  drivers/soundwire/amd_manager.h |  3 ++-
>  2 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
> index 1066d87aa011..20d94bcfc9b4 100644
> --- a/drivers/soundwire/amd_manager.c
> +++ b/drivers/soundwire/amd_manager.c
> @@ -129,6 +129,19 @@ static void amd_sdw_set_frameshape(struct amd_sdw_manager *amd_manager)
>  	writel(frame_size, amd_manager->mmio + ACP_SW_FRAMESIZE);
>  }
>  
> +static void amd_sdw_wake_enable(struct amd_sdw_manager *amd_manager, bool enable)
> +{
> +	u32 wake_ctrl;
> +
> +	wake_ctrl = readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
> +	if (enable)
> +		wake_ctrl |= AMD_SDW_WAKE_INTR_MASK;
> +	else
> +		wake_ctrl &= ~AMD_SDW_WAKE_INTR_MASK;
> +
> +	writel(wake_ctrl, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11);
> +}
> +
>  static void amd_sdw_ctl_word_prep(u32 *lower_word, u32 *upper_word, struct sdw_msg *msg,
>  				  int cmd_offset)
>  {
> @@ -1094,6 +1107,7 @@ static int __maybe_unused amd_suspend(struct device *dev)
>  	}
>  
>  	if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
> +		amd_sdw_wake_enable(amd_manager, false);
>  		return amd_sdw_clock_stop(amd_manager);
>  	} else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
>  		/*
> @@ -1120,6 +1134,7 @@ static int __maybe_unused amd_suspend_runtime(struct device *dev)
>  		return 0;
>  	}
>  	if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
> +		amd_sdw_wake_enable(amd_manager, true);
>  		return amd_sdw_clock_stop(amd_manager);
>  	} else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
>  		ret = amd_sdw_clock_stop(amd_manager);
> diff --git a/drivers/soundwire/amd_manager.h b/drivers/soundwire/amd_manager.h
> index 418b679e0b1a..707065468e05 100644
> --- a/drivers/soundwire/amd_manager.h
> +++ b/drivers/soundwire/amd_manager.h
> @@ -152,7 +152,7 @@
>  #define AMD_SDW0_EXT_INTR_MASK		0x200000
>  #define AMD_SDW1_EXT_INTR_MASK		4
>  #define AMD_SDW_IRQ_MASK_0TO7		0x77777777
> -#define AMD_SDW_IRQ_MASK_8TO11		0x000d7777
> +#define AMD_SDW_IRQ_MASK_8TO11		0x000c7777
>  #define AMD_SDW_IRQ_ERROR_MASK		0xff
>  #define AMD_SDW_MAX_FREQ_NUM		1
>  #define AMD_SDW0_MAX_TX_PORTS		3
> @@ -190,6 +190,7 @@
>  #define AMD_SDW_CLK_RESUME_REQ				2
>  #define AMD_SDW_CLK_RESUME_DONE				3
>  #define AMD_SDW_WAKE_STAT_MASK				BIT(16)
> +#define AMD_SDW_WAKE_INTR_MASK				BIT(16)
>  
>  static u32 amd_sdw_freq_tbl[AMD_SDW_MAX_FREQ_NUM] = {
>  	AMD_SDW_DEFAULT_CLK_FREQ,
> -- 
> 2.34.1

-- 
~Vinod