[PATCH 0/2] ASoC: rsnd: Fixes for multichannel HDMI audio output

From: Matthias Blankertz <matthias.blankertz@cetitec.com>
To: Mark Brown <broonie@kernel.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
	<alsa-devel@alsa-project.org>, <linux-kernel@vger.kernel.org>,
	<linux-renesas-soc@vger.kernel.org>
Subject: [PATCH 0/2] ASoC: rsnd: Fixes for multichannel HDMI audio output
Date: Wed, 15 Apr 2020 16:10:15 +0200	[thread overview]
Message-ID: <20200415141017.384017-1-matthias.blankertz@cetitec.com> (raw)

This fixes two issues in the snd-soc-rcar driver blocking multichannel
HDMI audio out: The parent SSI in a multi-SSI configuration is not
correctly set up and started, and the SSI->HDMI channel mapping is
wrong.

With these patches, the following device tree snippet can be used on an
r8a7795-based platform (Salvator-X) to enable multichannel HDMI audio on
HDMI0:

rsnd_port1: port@1 {
	rsnd_endpoint1: endpoint {
		remote-endpoint = <&dw_hdmi0_snd_in>;

		dai-format = "i2s";
		bitclock-master = <&rsnd_endpoint1>;
		frame-master = <&rsnd_endpoint1>;

		playback = <&ssi0 &ssi1 &ssi2 &ssi9>;
	};
};

With a capable receiver attached, all of 2ch (stereo), 6ch (e.g. 5.1)
and 8ch audio output should work.

Matthias Blankertz (2):
  ASoC: rsnd: Fix parent SSI start/stop in multi-SSI mode
  ASoC: rsnd: Fix HDMI channel mapping for multi-SSI mode

 sound/soc/sh/rcar/ssi.c  | 8 ++++----
 sound/soc/sh/rcar/ssiu.c | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

base-commit: 7111951b8d4973bda27ff663f2cf18b663d15b48
-- 
2.26.0