[RCAR] ADSP enable and add sound hardware abstraction in DT

The ADSP on Renesas SoCs required a reserved memory area to become
enabled, and this needs to be done manually.

This patch adds sound hardware abstraction information for the m3ulcb
and m3ulcb-kf (kingfisher) device trees. This is helpful on-board the
ADSP for dynamically determining sound hardware at runtime, allowing
single binaries to be used between the two boards.

Future work will incorporate the h3ulcb and Salvator boards into the
abstraction.

Bug-AGL: SPEC-1227
Bug-AGL: SPEC-1424
Bug-AGL: SPEC-1571

Change-Id: I78edc5854a95520276bdcd9fd9766a120d2c04d7
Signed-off-by: Ronan Le Martret <ronan.lemartret@iot.bzh>
Signed-off-by: Mark Farrugia <mark.farrugia@fiberdyne.com.au>
Signed-off-by: Ronan Le Martret <ronan.lemartret@iot.bzh>

2 files changed, 126 insertions, 0 deletions

diff --git a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0004-ADSP-enable-and-add-sound-hardware-abstraction.patch b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0004-ADSP-enable-and-add-sound-hardware-abstraction.patch
new file mode 100644
index 000000000..e0e726994
--- /dev/null
+++ b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/files/0004-ADSP-enable-and-add-sound-hardware-abstraction.patch
@@ -0,0 +1,121 @@
+The ADSP on Renesas SoCs required a reserved memory area to become
+enabled, and this needs to be done manually.
+
+This patch adds sound hardware abstraction information for the m3ulcb
+and m3ulcb-kf (kingfisher) device trees. This is helpful on-board the
+ADSP for dynamically determining sound hardware at runtime, allowing
+single binaries to be used between the two boards. 
+
+Future work will incorporate the h3ulcb and Salvator boards into the
+abstraction.
+
+Signed-off-by: Mark Farrugia <mark.farrugia@fiberdyne.com.au>
+---
+diff --git a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb-kf.dts b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb-kf.dts
+index de2390f009e7..4ccfa8315d17 100644
+--- a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb-kf.dts
++++ b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb-kf.dts
+@@ -17,3 +17,35 @@
+ 	compatible = "shimafuji,kingfisher", "renesas,m3ulcb",
+ 		     "renesas,r8a7796";
+ };
++
++&adsp {
++
++	/* ADSP playback setting for pcm3168 */
++	adsp_playback0: adsp,playback {
++		mode  = "tdm";
++		clock-mode = "master";
++		bus-width = <24>;
++		ssi = <3>;
++		bus-if = <0>;
++		channels = <8>;
++		pin-share-ssi = <4>;
++	};
++
++	/* ADSP capture setting for pcm3168 */
++	adsp_capture0: adsp,capture {
++		mode  = "tdm";
++		clock-mode = "slave";
++		bus-width = <24>;
++		ssi = <4>;
++		bus-if = <0>;
++		channels = <8>;
++		pin-share-ssi = <3>;
++	};
++	
++	adsp,ports {
++		port@0 {
++			playback = <&adsp_playback0>;
++			capture  = <&adsp_capture0>;
++		};
++	};
++};
+\ No newline at end of file
+diff --git a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+index 1cd64c1b3b31..71e59da3528d 100644
+--- a/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
++++ b/arch/arm64/boot/dts/renesas/r8a7796-m3ulcb.dts
+@@ -45,11 +45,18 @@
+ 			reg = <0x00000000 0x54000000 0x0 0x03000000>;
+ 		};
+ 
++		/* For Audio DSP */
++		adsp_reserved: linux,adsp {
++			compatible = "shared-dma-pool";
++			reusable;
++			reg = <0x00000000 0x57000000 0x0 0x01000000>;
++		};
++		
+ 		/* global autoconfigured region for contiguous allocations */
+ 		linux,cma {
+ 			compatible = "shared-dma-pool";
+ 			reusable;
+-			reg = <0x00000000 0x57000000 0x0 0x19000000>;
++			reg = <0x00000000 0x58000000 0x0 0x18000000>;
+ 			linux,cma-default;
+ 		};
+ 
+@@ -110,6 +117,42 @@
+ 		      "dclkin.0", "dclkin.1", "dclkin.2";
+ };
+ 
++&adsp {
++	status = "okay";
++	clock-frequency = <12288000 11289600>;
++	audio-clocks = <22579200 24576000>;
++	memory-region = <&adsp_reserved>;
++
++	/* ADSP playback setting for ak4613 */
++	adsp_playback0: adsp,playback {
++		mode  = "i2s";
++		clock-mode = "master";
++		bus-width = <16>;
++		ssi = <0>;
++		bus-if = <0>;
++		channels = <2>;
++		pin-share-ssi = <1>;
++	};
++
++	/* ADSP capture setting for ak4613 */
++	adsp_capture0: adsp,capture {
++		mode  = "i2s";
++		clock-mode = "slave";
++		bus-width = <16>;
++		ssi = <1>;
++		bus-if = <0>;
++		channels = <2>;
++		pin-share-ssi = <0>;
++	};
++	
++	adsp,ports {
++		port@0 {
++			playback = <&adsp_playback0>;
++			capture  = <&adsp_capture0>;
++		};
++	};
++};
++
+ &vspb {
+ 	status = "okay";
+ };
diff --git a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend
index 72eb22f09..9764eed2e 100644
--- a/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend
+++ b/meta-agl-bsp/meta-rcar-gen3/recipes-kernel/linux/linux-renesas_%.bbappend
@@ -5,3 +5,8 @@ require recipes-kernel/linux/linux-agl.inc
 SRC_URI_append  = " file://namespace_fix.cfg \
     file://0001-NFC-pn533-don-t-send-USB-data-off-of-the-stack.patch \
     "
+
+# Add ADSP patch to enable and add sound hardware abstraction
+SRC_URI_append = " \
+    file://0004-ADSP-enable-and-add-sound-hardware-abstraction.patch \
+"