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Message-ID: <1j34m6s62j.fsf@starbuckisacylon.baylibre.com>
Date: Wed, 11 Sep 2024 14:55:32 +0200
From: Jerome Brunet <jbrunet@...libre.com>
To: Takashi Iwai <tiwai@...e.de>
Cc: Péter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
Pierre-Louis Bossart
<pierre-louis.bossart@...ux.intel.com>, Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>, David Rhodes <david.rhodes@...rus.com>,
Richard Fitzgerald <rf@...nsource.cirrus.com>, Liam Girdwood
<lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, Cezary Rojewski
<cezary.rojewski@...el.com>, Liam Girdwood
<liam.r.girdwood@...ux.intel.com>, Bard Liao
<yung-chuan.liao@...ux.intel.com>, Ranjani Sridharan
<ranjani.sridharan@...ux.intel.com>, Kai Vehmanen
<kai.vehmanen@...ux.intel.com>, Srinivas Kandagatla
<srinivas.kandagatla@...aro.org>, Chen-Yu Tsai <wens@...e.org>, Jernej
Skrabec <jernej.skrabec@...il.com>, Samuel Holland <samuel@...lland.org>,
linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org,
patches@...nsource.cirrus.com, alsa-devel@...a-project.org,
linux-arm-msm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH 01/13] ALSA: pcm: add more sample rate definitions
On Wed 11 Sep 2024 at 12:51, Takashi Iwai <tiwai@...e.de> wrote:
> On Wed, 11 Sep 2024 12:33:01 +0200,
> Péter Ujfalusi wrote:
>>
>> On 11/09/2024 12:21, Takashi Iwai wrote:
>> >> Wondering if this is backwards compatible with the alsa-lib definitions,
>> >> specifically the topology parts which did unfortunately have a list of
>> >> rates that will map to a different index now:
>> >>
>> >>
>> >> typedef enum _snd_pcm_rates {
>> >> SND_PCM_RATE_UNKNOWN = -1,
>> >> SND_PCM_RATE_5512 = 0,
>> >> SND_PCM_RATE_8000,
>> >> SND_PCM_RATE_11025,
>> >> SND_PCM_RATE_16000,
>> >> SND_PCM_RATE_22050,
>> >> SND_PCM_RATE_32000,
>> >> SND_PCM_RATE_44100,
>> >> SND_PCM_RATE_48000,
>> >> SND_PCM_RATE_64000,
>> >> SND_PCM_RATE_88200,
>> >> SND_PCM_RATE_96000,
>> >> SND_PCM_RATE_176400,
>> >> SND_PCM_RATE_192000,
>> >> SND_PCM_RATE_CONTINUOUS = 30,
>> >> SND_PCM_RATE_KNOT = 31,
>> >> SND_PCM_RATE_LAST = SND_PCM_RATE_KNOT,
>> >> } snd_pcm_rates_t;
>> >
>> > As far as I understand correctly, those rate bits used for topology
>> > are independent from the bits used for PCM core, although it used to
>> > be the same. Maybe better to rename (such as SND_TPLG_RATE_*) so that
>> > it's clearer only for topology stuff.
>>
>> Even if we rename these in alsa-lib we will need translation from
>> SND_TPLG_RATE_ to SND_PCM_RATE_ in kernel likely?
>>
>> The topology files are out there and this is an ABI...
>>
>> > But it'd be better if anyone can double-check.
>>
>> Since the kernel just copies the rates bitfield, any rate above 11025
>> will be misaligned and result broken setup.
>
> Yep, I noticed it now, too.
>
> Below is the fix patch, totally untested.
> It'd be appreciated if anyone can test it quickly.
>
>
> thanks,
>
> Takashi
>
> -- 8< --
> From: Takashi Iwai <tiwai@...e.de>
> Subject: [PATCH] ALSA: pcm: Fix breakage of PCM rates used for topology
>
> It turned out that the topology ABI takes the standard PCM rate bits
> as is, and it means that the recent change of the PCM rate bits would
> lead to the inconsistent rate values used for topology.
>
> This patch reverts the original PCM rate bit definitions while adding
> the new rates to the extended bits instead. This needed the change of
> snd_pcm_known_rates, too. And this also required to fix the handling
> in snd_pcm_hw_limit_rates() that blindly assumed that the list is
> sorted while it became unsorted now.
>
> Fixes: 090624b7dc83 ("ALSA: pcm: add more sample rate definitions")
> Signed-off-by: Takashi Iwai <tiwai@...e.de>
> ---
> include/sound/pcm.h | 35 ++++++++++++++++++-----------------
> sound/core/pcm_misc.c | 18 ++++++++++--------
> sound/core/pcm_native.c | 10 +++++++---
> 3 files changed, 35 insertions(+), 28 deletions(-)
>
> diff --git a/include/sound/pcm.h b/include/sound/pcm.h
> index c993350975a9..824216799070 100644
> --- a/include/sound/pcm.h
> +++ b/include/sound/pcm.h
> @@ -109,23 +109,24 @@ struct snd_pcm_ops {
> #define SNDRV_PCM_RATE_5512 (1U<<0) /* 5512Hz */
> #define SNDRV_PCM_RATE_8000 (1U<<1) /* 8000Hz */
> #define SNDRV_PCM_RATE_11025 (1U<<2) /* 11025Hz */
> -#define SNDRV_PCM_RATE_12000 (1U<<3) /* 12000Hz */
> -#define SNDRV_PCM_RATE_16000 (1U<<4) /* 16000Hz */
> -#define SNDRV_PCM_RATE_22050 (1U<<5) /* 22050Hz */
> -#define SNDRV_PCM_RATE_24000 (1U<<6) /* 24000Hz */
> -#define SNDRV_PCM_RATE_32000 (1U<<7) /* 32000Hz */
> -#define SNDRV_PCM_RATE_44100 (1U<<8) /* 44100Hz */
> -#define SNDRV_PCM_RATE_48000 (1U<<9) /* 48000Hz */
> -#define SNDRV_PCM_RATE_64000 (1U<<10) /* 64000Hz */
> -#define SNDRV_PCM_RATE_88200 (1U<<11) /* 88200Hz */
> -#define SNDRV_PCM_RATE_96000 (1U<<12) /* 96000Hz */
> -#define SNDRV_PCM_RATE_128000 (1U<<13) /* 128000Hz */
> -#define SNDRV_PCM_RATE_176400 (1U<<14) /* 176400Hz */
> -#define SNDRV_PCM_RATE_192000 (1U<<15) /* 192000Hz */
> -#define SNDRV_PCM_RATE_352800 (1U<<16) /* 352800Hz */
> -#define SNDRV_PCM_RATE_384000 (1U<<17) /* 384000Hz */
> -#define SNDRV_PCM_RATE_705600 (1U<<18) /* 705600Hz */
> -#define SNDRV_PCM_RATE_768000 (1U<<19) /* 768000Hz */
> +#define SNDRV_PCM_RATE_16000 (1U<<3) /* 16000Hz */
> +#define SNDRV_PCM_RATE_22050 (1U<<4) /* 22050Hz */
> +#define SNDRV_PCM_RATE_32000 (1U<<5) /* 32000Hz */
> +#define SNDRV_PCM_RATE_44100 (1U<<6) /* 44100Hz */
> +#define SNDRV_PCM_RATE_48000 (1U<<7) /* 48000Hz */
> +#define SNDRV_PCM_RATE_64000 (1U<<8) /* 64000Hz */
> +#define SNDRV_PCM_RATE_88200 (1U<<9) /* 88200Hz */
> +#define SNDRV_PCM_RATE_96000 (1U<<10) /* 96000Hz */
> +#define SNDRV_PCM_RATE_176400 (1U<<11) /* 176400Hz */
> +#define SNDRV_PCM_RATE_192000 (1U<<12) /* 192000Hz */
> +#define SNDRV_PCM_RATE_352800 (1U<<13) /* 352800Hz */
> +#define SNDRV_PCM_RATE_384000 (1U<<14) /* 384000Hz */
> +#define SNDRV_PCM_RATE_705600 (1U<<15) /* 705600Hz */
> +#define SNDRV_PCM_RATE_768000 (1U<<16) /* 768000Hz */
> +/* extended rates */
> +#define SNDRV_PCM_RATE_12000 (1U<<17) /* 12000Hz */
> +#define SNDRV_PCM_RATE_24000 (1U<<18) /* 24000Hz */
> +#define SNDRV_PCM_RATE_128000 (1U<<19) /* 128000Hz */
>
> #define SNDRV_PCM_RATE_CONTINUOUS (1U<<30) /* continuous range */
> #define SNDRV_PCM_RATE_KNOT (1U<<31) /* supports more non-continuous rates */
> diff --git a/sound/core/pcm_misc.c b/sound/core/pcm_misc.c
> index 5588b6a1ee8b..4f556211bb56 100644
> --- a/sound/core/pcm_misc.c
> +++ b/sound/core/pcm_misc.c
> @@ -494,18 +494,20 @@ EXPORT_SYMBOL(snd_pcm_format_set_silence);
> int snd_pcm_hw_limit_rates(struct snd_pcm_hardware *hw)
> {
> int i;
> + unsigned int rmin, rmax;
> +
> + rmin = UINT_MAX;
> + rmax = 0;
> for (i = 0; i < (int)snd_pcm_known_rates.count; 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 (hw->rates & (1 << i)) {
> - hw->rate_max = snd_pcm_known_rates.list[i];
> - break;
> + rmin = min(rmin, snd_pcm_known_rates.list[i]);
> + rmax = max(rmax, snd_pcm_known_rates.list[i]);
> }
> }
> + if (rmin > rmax)
> + return -EINVAL;
> + hw->rate_min = rmin;
> + hw->rate_max = rmax;
> return 0;
> }
> EXPORT_SYMBOL(snd_pcm_hw_limit_rates);
> diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
> index 7461a727615c..5e1e6006707b 100644
> --- a/sound/core/pcm_native.c
> +++ b/sound/core/pcm_native.c
> @@ -2418,13 +2418,17 @@ static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
> return snd_interval_refine(hw_param_interval(params, rule->var), &t);
> }
>
> -#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_768000 != 1 << 19
> +#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 ||\
> + SNDRV_PCM_RATE_128000 != 1 << 19
> #error "Change this table"
> #endif
>
> +/* NOTE: the list is unsorted! */
> static const unsigned int rates[] = {
> - 5512, 8000, 11025, 12000, 16000, 22050, 24000, 32000, 44100, 48000, 64000,
> - 88200, 96000, 128000, 176400, 192000, 352800, 384000, 705600, 768000,
> + 5512, 8000, 11025, 16000, 22050, 32000, 44100,
> + 48000, 64000, 88200, 96000, 176400, 192000, 352800, 384000, 705600, 768000,
> + /* extended */
> + 12000, 24000, 128000
> };
>
> const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
I've quickly tested this version with a few rates (48, 128, 768k),
amlogic device.
Looks Ok.
Tested-by: Jerome Brunet <jbrunet@...libre.com>
Can't say for topology.
--
Jerome
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