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From: Samuel Holland <samuel@sholland.org>
To: Mark Brown <broonie@kernel.org>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Jerome Brunet <jbrunet@baylibre.com>
Cc: Ondrej Jirman <megous@megous.com>,
	alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	linux-doc@vger.kernel.org, Samuel Holland <samuel@sholland.org>
Subject: [PATCH v4 0/3] simple-audio-card codec2codec support
Date: Wed,  4 Mar 2020 23:11:40 -0600	[thread overview]
Message-ID: <20200305051143.60691-1-samuel@sholland.org> (raw)

We are currently using simple-audio-card on the Allwinner A64 SoC.
The digital audio codec there (sun8i-codec) has 3 AIFs, one each for the
CPU, the modem, and Bluetooth. Adding support for the secondary AIFs
requires adding codec2codec DAI links.

Since the modem and bt-sco codec DAI drivers only have one set of
possible PCM parameters (namely, 8kHz mono S16LE), there's no real
need for a machine driver to specify the DAI link configuration. The
parameters for these "simple" DAI links can be chosen automatically.

This series adds codec2codec DAI link support to simple-audio-card.
Codec to codec links are automatically detected when all DAIs in the
link belong to codec components.

I tried to reuse as much code as possible, so the first two patches
refactor a couple of helper functions to be more generic.

The last patch adds the new feature and its documentation.

Changes in v4:
  - Rebased on top of asoc/for-next, several changes to patch 2
  - Removed unused variable from patch 3
Changes in v3:
  - Update use of for_each_rtd_components for v5.6
Changes in v2:
  - Drop patch 1 as it was merged
  - Automatically detect codec2codec links instead of using a DT property

Samuel Holland (3):
  ALSA: pcm: Add a standalone version of snd_pcm_limit_hw_rates
  ASoC: pcm: Export parameter intersection logic
  ASoC: simple-card: Add support for codec2codec DAI links

 Documentation/sound/soc/codec-to-codec.rst |  9 +++-
 include/sound/pcm.h                        |  9 +++-
 include/sound/soc.h                        |  3 ++
 sound/core/pcm_misc.c                      | 18 +++----
 sound/soc/generic/simple-card-utils.c      | 48 ++++++++++++++++++
 sound/soc/soc-pcm.c                        | 59 ++++++++++++++--------
 6 files changed, 114 insertions(+), 32 deletions(-)

-- 
2.24.1


WARNING: multiple messages have this Message-ID
From: Samuel Holland <samuel@sholland.org>
To: Mark Brown <broonie@kernel.org>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Jerome Brunet <jbrunet@baylibre.com>
Cc: Ondrej Jirman <megous@megous.com>,
	alsa-devel@alsa-project.org, Samuel Holland <samuel@sholland.org>,
	linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
Subject: [PATCH v4 0/3] simple-audio-card codec2codec support
Date: Wed,  4 Mar 2020 23:11:40 -0600	[thread overview]
Message-ID: <20200305051143.60691-1-samuel@sholland.org> (raw)

We are currently using simple-audio-card on the Allwinner A64 SoC.
The digital audio codec there (sun8i-codec) has 3 AIFs, one each for the
CPU, the modem, and Bluetooth. Adding support for the secondary AIFs
requires adding codec2codec DAI links.

Since the modem and bt-sco codec DAI drivers only have one set of
possible PCM parameters (namely, 8kHz mono S16LE), there's no real
need for a machine driver to specify the DAI link configuration. The
parameters for these "simple" DAI links can be chosen automatically.

This series adds codec2codec DAI link support to simple-audio-card.
Codec to codec links are automatically detected when all DAIs in the
link belong to codec components.

I tried to reuse as much code as possible, so the first two patches
refactor a couple of helper functions to be more generic.

The last patch adds the new feature and its documentation.

Changes in v4:
  - Rebased on top of asoc/for-next, several changes to patch 2
  - Removed unused variable from patch 3
Changes in v3:
  - Update use of for_each_rtd_components for v5.6
Changes in v2:
  - Drop patch 1 as it was merged
  - Automatically detect codec2codec links instead of using a DT property

Samuel Holland (3):
  ALSA: pcm: Add a standalone version of snd_pcm_limit_hw_rates
  ASoC: pcm: Export parameter intersection logic
  ASoC: simple-card: Add support for codec2codec DAI links

 Documentation/sound/soc/codec-to-codec.rst |  9 +++-
 include/sound/pcm.h                        |  9 +++-
 include/sound/soc.h                        |  3 ++
 sound/core/pcm_misc.c                      | 18 +++----
 sound/soc/generic/simple-card-utils.c      | 48 ++++++++++++++++++
 sound/soc/soc-pcm.c                        | 59 ++++++++++++++--------
 6 files changed, 114 insertions(+), 32 deletions(-)

-- 
2.24.1


             reply	other threads:[~2020-03-05  5:11 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-05  5:11 Samuel Holland [this message]
2020-03-05  5:11 ` Samuel Holland
2020-03-05  5:11 ` [PATCH v4 1/3] ALSA: pcm: Add a standalone version of snd_pcm_limit_hw_rates Samuel Holland
2020-03-05  5:11   ` Samuel Holland
2020-03-05 14:53   ` Takashi Iwai
2020-03-05 14:53     ` Takashi Iwai
2020-03-05  5:11 ` [PATCH v4 2/3] ASoC: pcm: Export parameter intersection logic Samuel Holland
2020-03-05  5:11   ` Samuel Holland
2020-03-05  5:11 ` [PATCH v4 3/3] ASoC: simple-card: Add support for codec2codec DAI links Samuel Holland
2020-03-05  5:11   ` Samuel Holland
2020-03-06 15:03   ` Applied "ASoC: simple-card: Add support for codec2codec DAI links" to the asoc tree Mark Brown
2020-03-06 15:03     ` Mark Brown

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