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From: Kevin Hilman <khilman@baylibre.com>
To: Jerome Brunet <jbrunet@baylibre.com>,
	Mark Brown <broonie@kernel.org>,
	Liam Girdwood <lgirdwood@gmail.com>
Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org,
	linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
	Jerome Brunet <jbrunet@baylibre.com>
Subject: Re: [PATCH 0/5] ASoC: meson: add hdmitx glue support
Date: Wed, 15 May 2019 11:33:17 -0700
Message-ID: <7h7eard0uq.fsf@baylibre.com> (raw)
In-Reply-To: <20190515131858.32130-1-jbrunet@baylibre.com>

Jerome Brunet <jbrunet@baylibre.com> writes:

> 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.

Tested-by: Kevin Hilman <khilman@baylibre.com>

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Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-15 13:18 Jerome Brunet
2019-05-15 13:18 ` [PATCH 1/5] ASoC: meson: axg-card: set link name based on link node name Jerome Brunet
2019-05-16 11:13   ` Applied "ASoC: meson: axg-card: set link name based on link node name" to the asoc tree Mark Brown
2019-05-15 13:18 ` [PATCH 2/5] ASoC: dapm: allow muxes to force a disconnect Jerome Brunet
2019-05-16 11:13   ` Applied "ASoC: dapm: allow muxes to force a disconnect" to the asoc tree Mark Brown
2019-05-15 13:18 ` [PATCH 3/5] ASoC: meson: add tohdmitx DT bindings Jerome Brunet
2019-05-16 11:13   ` Applied "ASoC: meson: add tohdmitx DT bindings" to the asoc tree Mark Brown
2019-05-15 13:18 ` [PATCH 4/5] ASoC: meson: axg-card: add basic codec-to-codec link support Jerome Brunet
2019-05-16 11:13   ` Applied "ASoC: meson: axg-card: add basic codec-to-codec link support" to the asoc tree Mark Brown
2019-05-15 13:18 ` [PATCH 5/5] ASoC: meson: add g12a tohdmitx control Jerome Brunet
2019-05-16 11:13   ` Applied "ASoC: meson: add g12a tohdmitx control" to the asoc tree Mark Brown
2019-05-15 13:32 ` [PATCH 0/5] ASoC: meson: add hdmitx glue support Neil Armstrong
2019-05-15 18:33 ` Kevin Hilman [this message]

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