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SubjectRe: [PATCH 0/5] ASoC: meson: add hdmitx glue support
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On 15/05/2019 15:18, Jerome Brunet wrote:
> On the Amlogic SoC, there is a glue between the SoC audio outputs and the
> input of the embedded Synopsys HDMI controller.
>
> On the g12a, this glue is mostly a couple of muxes to select the i2s and
> spdif inputs of the hdmi controller. Each of these inputs may have
> different hw_params and fmt which makes our life a little bit more
> interesting, especially when switching between to active inputs.
>
> This glue is modeled as codec driver and uses codec-to-codec links to
> connect to the Synopsys controller. This allows to use the regular
> hdmi-codec driver (used by dw-hdmi i2s).
>
> To avoid glitches while switching input, the trick is to temporarily
> force a disconnection of the mux output, which shutdowns the output dai
> link. This also ensure that the stream parameters and fmt are updated
> when the output is connected back.
>
> Jerome Brunet (5):
> ASoC: meson: axg-card: set link name based on link node name
> ASoC: dapm: allow muxes to force a disconnect
> ASoC: meson: add tohdmitx DT bindings
> ASoC: meson: axg-card: add basic codec-to-codec link support
> ASoC: meson: add g12a tohdmitx control
>
> .../bindings/sound/amlogic,g12a-tohdmitx.txt | 55 +++
> .../dt-bindings/sound/meson-g12a-tohdmitx.h | 13 +
> sound/soc/meson/Kconfig | 8 +
> sound/soc/meson/Makefile | 2 +
> sound/soc/meson/axg-card.c | 31 +-
> sound/soc/meson/g12a-tohdmitx.c | 413 ++++++++++++++++++
> sound/soc/soc-dapm.c | 2 +-
> 7 files changed, 518 insertions(+), 6 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/sound/amlogic,g12a-tohdmitx.txt
> create mode 100644 include/dt-bindings/sound/meson-g12a-tohdmitx.h
> create mode 100644 sound/soc/meson/g12a-tohdmitx.c
>

Tested-by: Neil Armstrong <narmstrong@baylibre.com>

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