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Date:   17 Feb 2020 10:38:37 +0900
From:   Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Peter Ujfalusi <peter.ujfalusi@...com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        Aaro Koskinen <aaro.koskinen@....fi>,
        "Arthur D ." <spinal.by@...il.com>,
        Jarkko Nikula <jarkko.nikula@...mer.com>,
        Merlijn Wajer <merlijn@...zup.org>,
        Pavel Machek <pavel@....cz>, Sebastian Reichel <sre@...nel.org>
Subject: Re: [PATCH] ASoC: ti: Allocate dais dynamically for TDM and audio graph card


Hi

> > According to
> > Documentation/devicetree/bindings/sound/audio-graph-card.txt
> > it should be something like this:
> > &mcbsp3 {
> >         #sound-dai-cells = <0>;
> >         pinctrl-names = "default";
> >         pinctrl-0 = <&mcbsp3_pins>;
> >         status = "okay";
> > 
> >         ports {
> > 		#address-cells = <1>;
> > 		#size-cells = <0>;
> >                 port@0 {
> > 			reg = <0>;
> > 
> > 			cpu_dai3: endpoint@0 {
> > 				dai-format = "dsp_a";
> > 				frame-master = <&cpcap_audio_codec1>;
> > 				bitclock-master = <&cpcap_audio_codec1>;
> > 				remote-endpoint = <&cpcap_audio_codec1>;
> > 			};
> > 
> > 			cpu_dai_mdm: endpoint@1 {
> > 				dai-format = "dsp_a";
> > 				frame-master = <&cpcap_audio_codec1>;
> > 				bitclock-master = <&cpcap_audio_codec1>;
> > 				remote-endpoint = <&mot_mdm6600_audio_codec0>;
> > 			};
> > 		};
> > 	};
> > };
(snip)
> > I guess Morimoto-san can explain if he carries out of tree patches to
> > get the described setup working on top of mainline...

# I think ALSA ML is rejecting mail (?),
# I couldn't find original patch / Mail and Discussion at ALSA ML.
# Thus, I'm not 100% understanding what is the issue...

I confirmed attached patch on my local platform (= Renesas ULCB + KF board),
and it works well for me on at least v5.5 kernel.

--- kernel log --------------
...
[    2.184193] rcar_sound ec500000.sound: probed
...
[    2.227837] asoc-audio-graph-card sound: ak4613-hifi <-> rsnd-dai.0 mapping ok
[    2.235474] asoc-audio-graph-card sound: snd-soc-dummy-dai <-> rsnd-dai.2 mapping ok
[    2.243472] asoc-audio-graph-card sound: snd-soc-dummy-dai <-> rsnd-dai.3 mapping ok
[    2.251463] asoc-audio-graph-card sound: snd-soc-dummy-dai <-> rsnd-dai.4 mapping ok
[    2.259451] asoc-audio-graph-card sound: snd-soc-dummy-dai <-> rsnd-dai.5 mapping ok
[    2.267448] asoc-audio-graph-card sound: snd-soc-dummy-dai <-> rsnd-dai.6 mapping ok
[    2.275439] asoc-audio-graph-card sound: snd-soc-dummy-dai <-> rsnd-dai.7 mapping ok
[    2.283429] asoc-audio-graph-card sound: snd-soc-dummy-dai <-> rsnd-dai.8 mapping ok
[    2.291460] asoc-audio-graph-card sound: pcm3168a-dac <-> snd-soc-dummy-dai mapping ok
[    2.299460] asoc-audio-graph-card sound: pcm3168a-adc <-> snd-soc-dummy-dai mapping ok
...
[    5.479675] ALSA device list:
[    5.482694]   #0: rcar-sound
...

--- local patch -------------------

>From 8d25a2ce640ec5be506584ab50e685d0a962aa2d Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Date: Fri, 14 Dec 2018 09:47:47 +0900
Subject: [PATCH] Local v5.4: ulcb-kf: add TDM Split support

	CPU0 ------ ak4613
	CPU1 ------ PCM3168A-p	/* 1ch/2ch */
	CPU2 --/		/* 3ch/4ch */
	CPU3 --/		/* 5ch/6ch */
	CPU4 --/		/* 7ch/8ch */
	CPU5 ------ PCM3168A-c	/* 1ch/2ch */
	CPU6 --/		/* 3ch/4ch */
	CPU7 --/		/* 5ch/6ch */

aplay   -D plughw:0,0 xxx.wav // ak4613
aplay   -D plughw:0,1 xxx.wav // PCM3168A playback 1ch/2ch
aplay   -D plughw:0,2 xxx.wav // PCM3168A playback 3ch/4ch
aplay   -D plughw:0,3 xxx.wav // PCM3168A playback 5ch/6ch
aplay   -D plughw:0,4 xxx.wav // PCM3168A playback 7ch/8ch
arecord -D plughw:0,5 xxx     // PCM8168A capture  1ch/2ch
arecord -D plughw:0,6 xxx     // PCM8168A capture  3ch/4ch
arecord -D plughw:0,7 xxx     // PCM8168A capture  5ch/6ch

It seems 1 sound card DAI number is limited by SNDRV_MINOR().
Because of this size limit, total 8 DAI seems maximam.
So, this patch removes HDMI so far.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
---
 arch/arm64/boot/dts/renesas/ulcb-kf.dtsi | 103 +++++++++++++++++++++--
 1 file changed, 94 insertions(+), 9 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
index 202177706cde..5eaf97ea7480 100644
--- a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
@@ -115,18 +115,39 @@
 					#size-cells = <0>;
 					mclk-fs = <512>;
 					port@0 {
+						prefix = "pcm3168a";
+						convert-channels = <8>; /* TDM Split */
 						reg = <0>;
-						pcm3168a_endpoint_p: endpoint {
+						pcm3168a_endpoint_p: endpoint@0 {
 							remote-endpoint = <&rsnd_for_pcm3168a_play>;
 							clocks = <&clksndsel>;
 						};
+						pcm3168a_endpoint_p2: endpoint@1 {
+							remote-endpoint = <&rsnd_for_pcm3168a_play2>;
+						};
+						pcm3168a_endpoint_p3: endpoint@2 {
+							remote-endpoint = <&rsnd_for_pcm3168a_play3>;
+						};
+						pcm3168a_endpoint_p4: endpoint@3 {
+							remote-endpoint = <&rsnd_for_pcm3168a_play4>;
+						};
 					};
 					port@1 {
+						prefix = "pcm3168a";
+						convert-channels = <6>; /* TDM Split */
 						reg = <1>;
-						pcm3168a_endpoint_c: endpoint {
+						pcm3168a_endpoint_c: endpoint@0 {
 							remote-endpoint = <&rsnd_for_pcm3168a_capture>;
 							clocks = <&clksndsel>;
 						};
+						pcm3168a_endpoint_c2: endpoint@1 {
+							remote-endpoint = <&rsnd_for_pcm3168a_capture2>;
+							clocks = <&clksndsel>;
+						};
+						pcm3168a_endpoint_c3: endpoint@2 {
+							remote-endpoint = <&rsnd_for_pcm3168a_capture3>;
+							clocks = <&clksndsel>;
+						};
 					};
 				};
 			};
@@ -298,29 +319,83 @@
 	ports {
 		/* rsnd_port0/1 are on salvator-common */
 		rsnd_port2: port@2 {
+			#address-cells = <1>;
+			#size-cells = <0>;
 			reg = <2>;
-			rsnd_for_pcm3168a_play: endpoint {
+			rsnd_for_pcm3168a_play: endpoint@2 {
+				reg = <2>;
 				remote-endpoint = <&pcm3168a_endpoint_p>;
 
 				dai-format = "i2s";
 				bitclock-master = <&rsnd_for_pcm3168a_play>;
 				frame-master = <&rsnd_for_pcm3168a_play>;
-				dai-tdm-slot-num = <8>;
 
-				playback = <&ssi3>;
+				playback = <&ssiu30 &ssi3>;
+			};
+			rsnd_for_pcm3168a_play2: endpoint@3 {
+				reg = <3>;
+				remote-endpoint = <&pcm3168a_endpoint_p2>;
+
+				dai-format = "i2s";
+				bitclock-master = <&rsnd_for_pcm3168a_play2>;
+				frame-master = <&rsnd_for_pcm3168a_play2>;
+
+				playback = <&ssiu31 &ssi3>;
+			};
+			rsnd_for_pcm3168a_play3: endpoint@4 {
+				reg = <4>;
+				remote-endpoint = <&pcm3168a_endpoint_p3>;
+
+				dai-format = "i2s";
+				bitclock-master = <&rsnd_for_pcm3168a_play3>;
+				frame-master = <&rsnd_for_pcm3168a_play3>;
+
+				playback = <&ssiu32 &ssi3>;
+			};
+			rsnd_for_pcm3168a_play4: endpoint@5 {
+				reg = <5>;
+				remote-endpoint = <&pcm3168a_endpoint_p4>;
+
+				dai-format = "i2s";
+				bitclock-master = <&rsnd_for_pcm3168a_play4>;
+				frame-master = <&rsnd_for_pcm3168a_play4>;
+
+				playback = <&ssiu33 &ssi3>;
 			};
 		};
 		rsnd_port3: port@3 {
+			#address-cells = <1>;
+			#size-cells = <0>;
 			reg = <3>;
-			rsnd_for_pcm3168a_capture: endpoint {
+			rsnd_for_pcm3168a_capture: endpoint@6 {
+				reg = <6>;
 				remote-endpoint = <&pcm3168a_endpoint_c>;
 
 				dai-format = "i2s";
 				bitclock-master = <&rsnd_for_pcm3168a_capture>;
 				frame-master = <&rsnd_for_pcm3168a_capture>;
-				dai-tdm-slot-num = <6>;
 
-				capture  = <&ssi4>;
+				capture  = <&ssiu40 &ssi4>;
+			};
+			rsnd_for_pcm3168a_capture2: endpoint@7 {
+				reg = <7>;
+				remote-endpoint = <&pcm3168a_endpoint_c2>;
+
+				dai-format = "i2s";
+				bitclock-master = <&rsnd_for_pcm3168a_capture2>;
+				frame-master = <&rsnd_for_pcm3168a_capture2>;
+
+				capture  = <&ssiu41 &ssi4>;
+			};
+			rsnd_for_pcm3168a_capture3: endpoint@8 {
+				reg = <8>;
+				remote-endpoint = <&pcm3168a_endpoint_c3>;
+
+				dai-format = "i2s";
+				bitclock-master = <&rsnd_for_pcm3168a_capture3>;
+				frame-master = <&rsnd_for_pcm3168a_capture3>;
+
+				capture  = <&ssiu42 &ssi4>;
 			};
 		};
 	};
@@ -359,8 +434,18 @@
 };
 
 &sound_card {
+	compatible = "audio-graph-scu-card";
+
+	routing =	"pcm3168a Playback", "DAI2 Playback",
+			"pcm3168a Playback", "DAI3 Playback",
+			"pcm3168a Playback", "DAI4 Playback",
+			"pcm3168a Playback", "DAI5 Playback",
+			"DAI6 Capture", "pcm3168a Capture",
+			"DAI7 Capture", "pcm3168a Capture",
+			"DAI8 Capture", "pcm3168a Capture";
+
 	dais = <&rsnd_port0	/* ak4613 */
-		&rsnd_port1	/* HDMI0  */
+//		&rsnd_port1	/* HDMI0  */
 		&rsnd_port2	/* pcm3168a playback */
 		&rsnd_port3	/* pcm3168a capture  */
 		>;
-- 
2.17.1



Thank you for your help !!
Best regards
---
Kuninori Morimoto

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