Re: [PATCH 1/2] ALSA: HD-Audio: SKL+: abort probe if DSP is present and Skylake driver selected

[Takashi Iwai <tiwai@suse.de>]

On Sat, 08 Dec 2018 01:00:38 +0100,
Pierre-Louis Bossart wrote:
> 
> Now that the SST/Skylake driver supports per platform selectors, we
> can add logic to automatically select the right driver.
> 
> If the Skylake driver is selected, and the DSP is enable, the legacy
> HDaudio driver aborts the probe. This will result in a single driver
> probing and remove the need for modprobe blacklists.
> 
> Follow-up patches will add a module parameter to bypass the logic if
> this automatic detection fails, or if the Skylake driver is unable to
> actually support the platform (firmware authentication, missing
> topology file, hardware issue, etc).
> 
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> ---
>  sound/pci/hda/Kconfig          | 46 ++++++++++++++++++++++++++++++++++
>  sound/pci/hda/hda_controller.h |  2 +-
>  sound/pci/hda/hda_intel.c      | 34 +++++++++++++++++++------
>  sound/soc/intel/Kconfig        |  6 +++++
>  4 files changed, 80 insertions(+), 8 deletions(-)
> 
> diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig
> index 4235907b7858..634b7fe6a936 100644
> --- a/sound/pci/hda/Kconfig
> +++ b/sound/pci/hda/Kconfig
> @@ -226,6 +226,52 @@ config SND_HDA_POWER_SAVE_DEFAULT
>  	  The default time-out value in seconds for HD-audio automatic
>  	  power-save mode.  0 means to disable the power-save mode.
>  
> +if SND_HDA_INTEL
> +
> +config SND_HDA_INTEL_DISABLE_SKL
> +	bool
> +	help
> +	  This option disables HD-audio legacy for
> +	  Skylake machines

I'm not sure whether we need the selection of this disablement for
each model.  Distros would choose these unlikely, and individual users
don't have to select multiple of them but only for their machine's
model.  So, in the end, the choice would be either yes or no.


thanks,

Takashi


> +
> +config SND_HDA_INTEL_DISABLE_APL
> +	bool
> +	help
> +	  This option disables HD-audio legacy for
> +	  Broxton/ApolloLake machines
> +
> +config SND_HDA_INTEL_DISABLE_KBL
> +	bool
> +	help
> +	  This option disables HD-audio legacy for
> +	  KabyLake machines
> +
> +config SND_HDA_INTEL_DISABLE_GLK
> +	bool
> +	help
> +	  This option disables HD-audio legacy for
> +	  GeminiLake machines
> +
> +config SND_HDA_INTEL_DISABLE_CNL
> +	bool
> +	help
> +	  This option disables HD-audio legacy for
> +	  CannonLake machines
> +
> +config SND_HDA_INTEL_DISABLE_CFL
> +	bool
> +	help
> +	  This option disables HD-audio legacy for
> +	  CoffeeLake machines
> +
> +config SND_HDA_INTEL_DISABLE_ICL
> +	bool
> +	help
> +	  This option disables HD-audio legacy for
> +	  IceLake machines
> +
> +endif ## SND_HDA_INTEL
> +
>  endif
>  
>  endmenu
> diff --git a/sound/pci/hda/hda_controller.h b/sound/pci/hda/hda_controller.h
> index c95097bb5a0c..2351115f922e 100644
> --- a/sound/pci/hda/hda_controller.h
> +++ b/sound/pci/hda/hda_controller.h
> @@ -37,7 +37,7 @@
>  #else
>  #define AZX_DCAPS_I915_COMPONENT 0		/* NOP */
>  #endif
> -/* 14 unused */
> +#define AZX_DCAPS_INTEL_SHARED	(1 << 14)	/* shared with ASoC */
>  #define AZX_DCAPS_CTX_WORKAROUND (1 << 15)	/* X-Fi workaround */
>  #define AZX_DCAPS_POSFIX_LPIB	(1 << 16)	/* Use LPIB as default */
>  /* 17 unused */
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index d8eb2b5f51ae..0c76713ac5c0 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -360,6 +360,7 @@ enum {
>  	 AZX_DCAPS_NO_64BIT |\
>  	 AZX_DCAPS_4K_BDLE_BOUNDARY | AZX_DCAPS_SNOOP_OFF)
>  
> +#define AZX_DCAPS_INTEL_LEGACY_DISABLE(conf) (IS_ENABLED(CONFIG_SND_HDA_INTEL_DISABLE_##conf) ? AZX_DCAPS_INTEL_SHARED : 0)
>  /*
>   * vga_switcheroo support
>   */
> @@ -2091,6 +2092,11 @@ static int azx_probe(struct pci_dev *pci,
>  	bool schedule_probe;
>  	int err;
>  
> +	/* check if this driver can be used on SKL+ Intel platforms */
> +	if ((pci_id->driver_data & AZX_DCAPS_INTEL_SHARED) &&
> +	    pci->class != 0x040300)
> +		return -ENODEV;
> +
>  	if (dev >= SNDRV_CARDS)
>  		return -ENODEV;
>  	if (!enable[dev]) {
> @@ -2406,34 +2412,48 @@ static const struct pci_device_id azx_ids[] = {
>  	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
>  	/* Sunrise Point-LP */
>  	{ PCI_DEVICE(0x8086, 0x9d70),
> -	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
> +	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE |
> +	  AZX_DCAPS_INTEL_LEGACY_DISABLE(SKL)
> +	},
>  	/* Kabylake */
>  	{ PCI_DEVICE(0x8086, 0xa171),
>  	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
>  	/* Kabylake-LP */
>  	{ PCI_DEVICE(0x8086, 0x9d71),
> -	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
> +	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE |
> +	  AZX_DCAPS_INTEL_LEGACY_DISABLE(KBL)
> +	},
>  	/* Kabylake-H */
>  	{ PCI_DEVICE(0x8086, 0xa2f0),
>  	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE },
>  	/* Coffelake */
>  	{ PCI_DEVICE(0x8086, 0xa348),
> -	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
> +	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE |
> +	  AZX_DCAPS_INTEL_LEGACY_DISABLE(CFL)
> +	},
>  	/* Cannonlake */
>  	{ PCI_DEVICE(0x8086, 0x9dc8),
> -	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
> +	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE |
> +	  AZX_DCAPS_INTEL_LEGACY_DISABLE(CNL)
> +	},
>  	/* Icelake */
>  	{ PCI_DEVICE(0x8086, 0x34c8),
> -	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE},
> +	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_SKYLAKE |
> +	  AZX_DCAPS_INTEL_LEGACY_DISABLE(ICL)
> +	},
>  	/* Broxton-P(Apollolake) */
>  	{ PCI_DEVICE(0x8086, 0x5a98),
> -	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON },
> +	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON |
> +	  AZX_DCAPS_INTEL_LEGACY_DISABLE(APL)
> +	},
>  	/* Broxton-T */
>  	{ PCI_DEVICE(0x8086, 0x1a98),
>  	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON },
>  	/* Gemini-Lake */
>  	{ PCI_DEVICE(0x8086, 0x3198),
> -	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON },
> +	  .driver_data = AZX_DRIVER_SKL | AZX_DCAPS_INTEL_BROXTON |
> +	  AZX_DCAPS_INTEL_LEGACY_DISABLE(GLK)
> +	},
>  	/* Haswell */
>  	{ PCI_DEVICE(0x8086, 0x0a0c),
>  	  .driver_data = AZX_DRIVER_HDMI | AZX_DCAPS_INTEL_HASWELL },
> diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
> index 99a62ba409df..f817bda5cab5 100644
> --- a/sound/soc/intel/Kconfig
> +++ b/sound/soc/intel/Kconfig
> @@ -188,6 +188,12 @@ config SND_SOC_INTEL_SKYLAKE_COMMON
>  	select SND_SOC_TOPOLOGY
>  	select SND_SOC_INTEL_SST
>  	select SND_SOC_HDAC_HDA if SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC
> +	select SND_HDA_INTEL_DISABLE_SKL if SND_SOC_INTEL_SKL
> +	select SND_HDA_INTEL_DISABLE_APL if SND_SOC_INTEL_APL
> +	select SND_HDA_INTEL_DISABLE_KBL if SND_SOC_INTEL_KBL
> +	select SND_HDA_INTEL_DISABLE_GLK if SND_SOC_INTEL_GLK
> +	select SND_HDA_INTEL_DISABLE_CNL if SND_SOC_INTEL_CNL
> +	select SND_HDA_INTEL_DISABLE_CFL if SND_SOC_INTEL_CFL
>  	select SND_SOC_ACPI_INTEL_MATCH
>  	help
>  	  If you have a Intel Skylake/Broxton/ApolloLake/KabyLake/
> -- 
> 2.17.1
>