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Subject[PATCH 0/4] simple-audio-card codec2codec support
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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 a single "codec-to-codec" property to the
simple-audio-card binding, which does exactly what it says. It works out
rather nicely without making the device tree binding too complicated.

The first patch fixes a bug I found while implementing this feature.

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

Finally, the last patch adds the new feature and its documentation.

Samuel Holland (4):
ASoC: codec2codec: avoid invalid/double-free of pcm runtime
ALSA: pcm: Make snd_pcm_limit_hw_rates take hw directly
ASoC: pcm: Export parameter intersection logic
ASoC: simple-card: Add support for codec-to-codec dai_links

.../devicetree/bindings/sound/simple-card.txt | 1 +
Documentation/sound/soc/codec-to-codec.rst | 9 ++-
.../drm/bridge/synopsys/dw-hdmi-ahb-audio.c | 2 +-
include/sound/pcm.h | 2 +-
include/sound/simple_card_utils.h | 1 +
include/sound/soc.h | 3 +
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/generic/simple-card-utils.c | 39 +++++++++++++
sound/soc/generic/simple-card.c | 12 ++++
sound/soc/soc-dapm.c | 3 -
sound/soc/soc-pcm.c | 57 +++++++++++++------
sound/usb/caiaq/audio.c | 4 +-
25 files changed, 130 insertions(+), 49 deletions(-)

--
2.24.1

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