Re: [PATCH 2/4] ALSA: pcm: Make snd_pcm_limit_hw_rates take hw directly

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On Thu, 13 Feb 2020 07:11:45 +0100,
Samuel Holland wrote:
> 
> It can be useful to derive min/max rates of a snd_pcm_hardware without
> having a snd_pcm_runtime, such as before constructing an ASoC DAI link.
> 
> Since snd_pcm_limit_hw_rates only uses runtime->hw, it does not actually
> need the snd_pcm_runtime. Modify it to take a pointer to hw directly.

I prefer adding a new function and change snd_pcm_limit_hw_rates() to
static inline just calling the new one with &runtime->hw, instead of
touching so many callers site.


thanks,

Takashi

> 
> Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx>
> ---
>  .../gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c    |  2 +-
>  include/sound/pcm.h                                |  2 +-
>  sound/arm/aaci.c                                   |  2 +-
>  sound/arm/pxa2xx-ac97.c                            |  2 +-
>  sound/core/pcm_misc.c                              | 14 +++++++-------
>  sound/firewire/dice/dice-pcm.c                     |  2 +-
>  sound/firewire/digi00x/digi00x-pcm.c               |  2 +-
>  sound/firewire/fireworks/fireworks_pcm.c           |  2 +-
>  sound/firewire/motu/motu-pcm.c                     |  2 +-
>  sound/firewire/tascam/tascam-pcm.c                 |  2 +-
>  sound/pci/atiixp.c                                 |  2 +-
>  sound/pci/cs5535audio/cs5535audio_pcm.c            |  4 ++--
>  sound/pci/hda/hda_controller.c                     |  4 ++--
>  sound/pci/intel8x0.c                               |  2 +-
>  sound/pci/sis7019.c                                |  2 +-
>  sound/pci/via82xx.c                                |  4 ++--
>  sound/soc/soc-pcm.c                                |  4 ++--
>  sound/usb/caiaq/audio.c                            |  4 ++--
>  18 files changed, 29 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
> index 2b7539701b42..33f7bcf992a4 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-ahb-audio.c
> @@ -328,7 +328,7 @@ static int dw_hdmi_open(struct snd_pcm_substream *substream)
>  	if (ret < 0)
>  		return ret;
>  
> -	ret = snd_pcm_limit_hw_rates(runtime);
> +	ret = snd_pcm_limit_hw_rates(&runtime->hw);
>  	if (ret < 0)
>  		return ret;
>  
> diff --git a/include/sound/pcm.h b/include/sound/pcm.h
> index 8a89fa6fdd5e..203b79d2712a 100644
> --- a/include/sound/pcm.h
> +++ b/include/sound/pcm.h
> @@ -1121,7 +1121,7 @@ snd_pcm_kernel_readv(struct snd_pcm_substream *substream,
>  	return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
>  }
>  
> -int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
> +int snd_pcm_limit_hw_rates(struct snd_pcm_hardware *hw);
>  unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
>  unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
>  unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a,
> diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c
> index b5399b0090a7..5052689247f9 100644
> --- a/sound/arm/aaci.c
> +++ b/sound/arm/aaci.c
> @@ -413,7 +413,7 @@ static int aaci_pcm_open(struct snd_pcm_substream *substream)
>  	runtime->private_data = aacirun;
>  	runtime->hw = aaci_hw_info;
>  	runtime->hw.rates = aacirun->pcm->rates;
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  
>  	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
>  		runtime->hw.channels_max = 6;
> diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
> index acfaf1d4ec25..cfb23073471e 100644
> --- a/sound/arm/pxa2xx-ac97.c
> +++ b/sound/arm/pxa2xx-ac97.c
> @@ -77,7 +77,7 @@ static int pxa2xx_ac97_pcm_open(struct snd_pcm_substream *substream)
>  	i = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
>  		AC97_RATES_FRONT_DAC : AC97_RATES_ADC;
>  	runtime->hw.rates = pxa2xx_ac97_ac97->rates[i];
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  
>  	platform_ops = substream->pcm->card->dev->platform_data;
>  	if (platform_ops && platform_ops->startup) {
> diff --git a/sound/core/pcm_misc.c b/sound/core/pcm_misc.c
> index c4eb561d2008..435688855ed0 100644
> --- a/sound/core/pcm_misc.c
> +++ b/sound/core/pcm_misc.c
> @@ -474,25 +474,25 @@ EXPORT_SYMBOL(snd_pcm_format_set_silence);
>  
>  /**
>   * snd_pcm_limit_hw_rates - determine rate_min/rate_max fields
> - * @runtime: the runtime instance
> + * @runtime: the pcm hw instance
>   *
>   * Determines the rate_min and rate_max fields from the rates bits of
> - * the given runtime->hw.
> + * the given hw.
>   *
>   * Return: Zero if successful.
>   */
> -int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime)
> +int snd_pcm_limit_hw_rates(struct snd_pcm_hardware *hw)
>  {
>  	int i;
>  	for (i = 0; i < (int)snd_pcm_known_rates.count; i++) {
> -		if (runtime->hw.rates & (1 << i)) {
> -			runtime->hw.rate_min = snd_pcm_known_rates.list[i];
> +		if (hw->rates & (1 << i)) {
> +			hw->rate_min = snd_pcm_known_rates.list[i];
>  			break;
>  		}
>  	}
>  	for (i = (int)snd_pcm_known_rates.count - 1; i >= 0; i--) {
> -		if (runtime->hw.rates & (1 << i)) {
> -			runtime->hw.rate_max = snd_pcm_known_rates.list[i];
> +		if (hw->rates & (1 << i)) {
> +			hw->rate_max = snd_pcm_known_rates.list[i];
>  			break;
>  		}
>  	}
> diff --git a/sound/firewire/dice/dice-pcm.c b/sound/firewire/dice/dice-pcm.c
> index be79d659eedf..85941d945067 100644
> --- a/sound/firewire/dice/dice-pcm.c
> +++ b/sound/firewire/dice/dice-pcm.c
> @@ -117,7 +117,7 @@ static int limit_channels_and_rates(struct snd_dice *dice,
>  		hw->channels_max = max(hw->channels_max, channels);
>  	}
>  
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(hw);
>  
>  	return 0;
>  }
> diff --git a/sound/firewire/digi00x/digi00x-pcm.c b/sound/firewire/digi00x/digi00x-pcm.c
> index 57cbce4fd836..0709070ab5af 100644
> --- a/sound/firewire/digi00x/digi00x-pcm.c
> +++ b/sound/firewire/digi00x/digi00x-pcm.c
> @@ -78,7 +78,7 @@ static int pcm_init_hw_params(struct snd_dg00x *dg00x,
>  		    SNDRV_PCM_RATE_48000 |
>  		    SNDRV_PCM_RATE_88200 |
>  		    SNDRV_PCM_RATE_96000;
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(hw);
>  
>  	err = snd_pcm_hw_rule_add(substream->runtime, 0,
>  				  SNDRV_PCM_HW_PARAM_CHANNELS,
> diff --git a/sound/firewire/fireworks/fireworks_pcm.c b/sound/firewire/fireworks/fireworks_pcm.c
> index e69896d748df..2ee8e98ea2b6 100644
> --- a/sound/firewire/fireworks/fireworks_pcm.c
> +++ b/sound/firewire/fireworks/fireworks_pcm.c
> @@ -149,7 +149,7 @@ pcm_init_hw_params(struct snd_efw *efw,
>  
>  	/* limit rates */
>  	runtime->hw.rates = efw->supported_sampling_rate,
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  
>  	limit_channels(&runtime->hw, pcm_channels);
>  
> diff --git a/sound/firewire/motu/motu-pcm.c b/sound/firewire/motu/motu-pcm.c
> index 005970931030..338eb0572890 100644
> --- a/sound/firewire/motu/motu-pcm.c
> +++ b/sound/firewire/motu/motu-pcm.c
> @@ -92,7 +92,7 @@ static void limit_channels_and_rates(struct snd_motu *motu,
>  		hw->channels_max = max(hw->channels_max, pcm_channels);
>  	}
>  
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(hw);
>  }
>  
>  static int init_hw_info(struct snd_motu *motu,
> diff --git a/sound/firewire/tascam/tascam-pcm.c b/sound/firewire/tascam/tascam-pcm.c
> index 8e9b444c8bff..6722c1a65a42 100644
> --- a/sound/firewire/tascam/tascam-pcm.c
> +++ b/sound/firewire/tascam/tascam-pcm.c
> @@ -35,7 +35,7 @@ static int pcm_init_hw_params(struct snd_tscm *tscm,
>  		    SNDRV_PCM_RATE_48000 |
>  		    SNDRV_PCM_RATE_88200 |
>  		    SNDRV_PCM_RATE_96000;
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(hw);
>  
>  	return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
>  }
> diff --git a/sound/pci/atiixp.c b/sound/pci/atiixp.c
> index 1e1ededf8eb2..d7af407306b7 100644
> --- a/sound/pci/atiixp.c
> +++ b/sound/pci/atiixp.c
> @@ -1039,7 +1039,7 @@ static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
>  	dma->ac97_pcm_type = pcm_type;
>  	if (pcm_type >= 0) {
>  		runtime->hw.rates = chip->pcms[pcm_type]->rates;
> -		snd_pcm_limit_hw_rates(runtime);
> +		snd_pcm_limit_hw_rates(&runtime->hw);
>  	} else {
>  		/* direct SPDIF */
>  		runtime->hw.formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE;
> diff --git a/sound/pci/cs5535audio/cs5535audio_pcm.c b/sound/pci/cs5535audio/cs5535audio_pcm.c
> index 4642e5384e83..7ce1664a8148 100644
> --- a/sound/pci/cs5535audio/cs5535audio_pcm.c
> +++ b/sound/pci/cs5535audio/cs5535audio_pcm.c
> @@ -84,7 +84,7 @@ static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
>  
>  	runtime->hw = snd_cs5535audio_playback;
>  	runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  	cs5535au->playback_substream = substream;
>  	runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
>  	if ((err = snd_pcm_hw_constraint_integer(runtime,
> @@ -343,7 +343,7 @@ static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
>  
>  	runtime->hw = snd_cs5535audio_capture;
>  	runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  	cs5535au->capture_substream = substream;
>  	runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
>  	if ((err = snd_pcm_hw_constraint_integer(runtime,
> diff --git a/sound/pci/hda/hda_controller.c b/sound/pci/hda/hda_controller.c
> index ba56b59b3e17..3728dbfae7b0 100644
> --- a/sound/pci/hda/hda_controller.c
> +++ b/sound/pci/hda/hda_controller.c
> @@ -605,7 +605,7 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
>  	runtime->hw.channels_max = hinfo->channels_max;
>  	runtime->hw.formats = hinfo->formats;
>  	runtime->hw.rates = hinfo->rates;
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
>  
>  	/* avoid wrap-around with wall-clock */
> @@ -648,7 +648,7 @@ static int azx_pcm_open(struct snd_pcm_substream *substream)
>  		azx_release_device(azx_dev);
>  		goto powerdown;
>  	}
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  	/* sanity check */
>  	if (snd_BUG_ON(!runtime->hw.channels_min) ||
>  	    snd_BUG_ON(!runtime->hw.channels_max) ||
> diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
> index 12374ba08ca2..7f85a30291a1 100644
> --- a/sound/pci/intel8x0.c
> +++ b/sound/pci/intel8x0.c
> @@ -1119,7 +1119,7 @@ static int snd_intel8x0_pcm_open(struct snd_pcm_substream *substream, struct ich
>  	ichdev->substream = substream;
>  	runtime->hw = snd_intel8x0_stream;
>  	runtime->hw.rates = ichdev->pcm->rates;
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  	if (chip->device_type == DEVICE_SIS) {
>  		runtime->hw.buffer_bytes_max = 64*1024;
>  		runtime->hw.period_bytes_max = 64*1024;
> diff --git a/sound/pci/sis7019.c b/sound/pci/sis7019.c
> index ef7dd290ae05..4d8e852d438f 100644
> --- a/sound/pci/sis7019.c
> +++ b/sound/pci/sis7019.c
> @@ -681,7 +681,7 @@ static int sis_capture_open(struct snd_pcm_substream *substream)
>  	runtime->private_data = voice;
>  	runtime->hw = sis_capture_hw_info;
>  	runtime->hw.rates = sis->ac97[0]->rates[AC97_RATES_ADC];
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
>  						9, 0xfff9);
>  	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
> diff --git a/sound/pci/via82xx.c b/sound/pci/via82xx.c
> index 30c817b6b635..8a55153a6ea3 100644
> --- a/sound/pci/via82xx.c
> +++ b/sound/pci/via82xx.c
> @@ -1180,7 +1180,7 @@ static int snd_via82xx_pcm_open(struct via82xx *chip, struct viadev *viadev,
>  	if (chip->spdif_on && viadev->reg_offset == 0x30) {
>  		/* DXS#3 and spdif is on */
>  		runtime->hw.rates = chip->ac97->rates[AC97_RATES_SPDIF];
> -		snd_pcm_limit_hw_rates(runtime);
> +		snd_pcm_limit_hw_rates(&runtime->hw);
>  	} else if (chip->dxs_fixed && viadev->reg_offset < 0x40) {
>  		/* fixed DXS playback rate */
>  		runtime->hw.rates = SNDRV_PCM_RATE_48000;
> @@ -1195,7 +1195,7 @@ static int snd_via82xx_pcm_open(struct via82xx *chip, struct viadev *viadev,
>  	} else if (! ratep->rate) {
>  		int idx = viadev->direction ? AC97_RATES_ADC : AC97_RATES_FRONT_DAC;
>  		runtime->hw.rates = chip->ac97->rates[idx];
> -		snd_pcm_limit_hw_rates(runtime);
> +		snd_pcm_limit_hw_rates(&runtime->hw);
>  	} else {
>  		/* a fixed rate */
>  		runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
> diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
> index 01e7bc03d92f..bd7b3cfcfa62 100644
> --- a/sound/soc/soc-pcm.c
> +++ b/sound/soc/soc-pcm.c
> @@ -416,7 +416,7 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream)
>  		hw->formats = formats & cpu_stream->formats;
>  	hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates);
>  
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(hw);
>  
>  	hw->rate_min = max(hw->rate_min, cpu_stream->rate_min);
>  	hw->rate_min = max(hw->rate_min, rate_min);
> @@ -1951,7 +1951,7 @@ static int dpcm_fe_dai_startup(struct snd_pcm_substream *fe_substream)
>  	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
>  
>  	dpcm_set_fe_runtime(fe_substream);
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  
>  	ret = dpcm_apply_symmetry(fe_substream, stream);
>  	if (ret < 0) {
> diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c
> index 970eb0865ba3..242f50ebc63a 100644
> --- a/sound/usb/caiaq/audio.c
> +++ b/sound/usb/caiaq/audio.c
> @@ -145,7 +145,7 @@ static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream)
>  
>  	dev_dbg(dev, "%s(%p)\n", __func__, substream);
>  	substream->runtime->hw = cdev->pcm_info;
> -	snd_pcm_limit_hw_rates(substream->runtime);
> +	snd_pcm_limit_hw_rates(&substream->runtime->hw);
>  
>  	return 0;
>  }
> @@ -243,7 +243,7 @@ static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream)
>  		if (runtime->rate == rates[i])
>  			cdev->pcm_info.rates = 1 << i;
>  
> -	snd_pcm_limit_hw_rates(runtime);
> +	snd_pcm_limit_hw_rates(&runtime->hw);
>  
>  	bytes_per_sample = BYTES_PER_SAMPLE;
>  	if (cdev->spec.data_alignment >= 2)
> -- 
> 2.24.1
> 
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