linux-kernel - Re: [PATCH 13/13] ASoC: Intel: sst: Convert to PCI device IDs defines

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Message-ID: <958f3638-f68a-ebec-29cc-816f823b017f@linux.intel.com>
Date:   Wed, 12 Jul 2023 14:19:47 +0200
From:   Amadeusz Sławiński 
        <amadeuszx.slawinski@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...el.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        alsa-devel@...a-project.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH 13/13] ASoC: Intel: sst: Convert to PCI device IDs defines

On 7/11/2023 4:33 PM, Andy Shevchenko wrote:
> On Tue, Jul 11, 2023 at 02:57:26PM +0200, Amadeusz Sławiński wrote:
>> Use PCI device IDs from pci_ids.h header.
> 
> ...
> 
>>   	switch (sst->dev_id) {
>> -	case SST_MRFLD_PCI_ID:
>> +	case PCI_DEVICE_ID_INTEL_ADSP_TNG:
>>   	case SST_BYT_ACPI_ID:
>>   	case SST_CHV_ACPI_ID:
> 
> I think this needs a bit more, i.e. replacing the rest with respective PCI IDs.
> 
> All three will be defined with SST prefix, which makes sense to me.
> 
> ACPI here is a bit misleading, but correct. The ACPI specification assumes that
> respective part of the ID space covers 100% of PCI ID space.
> 
> I have briefly checked the code and it seems that ID is used externally only
> for PCI case, so we may simply use the lower 16 bits of the ACPI _HID for the
> context.
> 

Do I understand correctly that I should just do:
#define PCI_DEVICE_ID_INTEL_SST_BYT	0x0F28
#define PCI_DEVICE_ID_INTEL_SST_CHV	0x22A8
and use those IDs instead?

> diff --git a/sound/soc/intel/atom/sst/sst.c b/sound/soc/intel/atom/sst/sst.c
> index a0d29510d2bc..b1f59604d825 100644
> --- a/sound/soc/intel/atom/sst/sst.c
> +++ b/sound/soc/intel/atom/sst/sst.c
> @@ -222,7 +222,7 @@ static void sst_init_locks(struct intel_sst_drv *ctx)
>   }
>   
>   int sst_alloc_drv_context(struct intel_sst_drv **ctx,
> -		struct device *dev, unsigned int dev_id)
> +		struct device *dev, unsigned short dev_id)
>   {
>   	*ctx = devm_kzalloc(dev, sizeof(struct intel_sst_drv), GFP_KERNEL);
>   	if (!(*ctx))
> diff --git a/sound/soc/intel/atom/sst/sst.h b/sound/soc/intel/atom/sst/sst.h
> index 4d37d39fd8f4..c04f033e1d5f 100644
> --- a/sound/soc/intel/atom/sst/sst.h
> +++ b/sound/soc/intel/atom/sst/sst.h
> @@ -358,7 +358,7 @@ struct sst_fw_save {
>   struct intel_sst_drv {
>   	int			sst_state;
>   	int			irq_num;
> -	unsigned int		dev_id;
> +	unsigned short		dev_id;
>   	void __iomem		*ddr;
>   	void __iomem		*shim;
>   	void __iomem		*mailbox;
> @@ -523,7 +523,7 @@ int sst_register(struct device *);
>   int sst_unregister(struct device *);
>   
>   int sst_alloc_drv_context(struct intel_sst_drv **ctx,
> -		struct device *dev, unsigned int dev_id);
> +		struct device *dev, unsigned short dev_id);
>   int sst_context_init(struct intel_sst_drv *ctx);
>   void sst_context_cleanup(struct intel_sst_drv *ctx);
>   void sst_configure_runtime_pm(struct intel_sst_drv *ctx);
> 
> ...
> 
>>   /* driver names */
>>   #define SST_DRV_NAME "intel_sst_driver"
> 
>> -#define SST_MRFLD_PCI_ID 0x119A
>>   #define SST_BYT_ACPI_ID	0x80860F28
>>   #define SST_CHV_ACPI_ID	0x808622A8
> 
> And kill all three!
>