[PATCH 42/62] ARM: dts: iwg20d-q7-common: Sound DMA support via DVC on DTS


Biju Das <biju.das@...>
 

DMA transfer uses DVC

DMA DMApp
[MEM] -> [SRC] -> [DVC] -> [SSIU] -> [SSI]

DMA DMApp
[MEM] <- [DVC] <- [SRC] <- [SSIU] <- [SSI]

Signed-off-by: Biju Das <biju.das@...>
Reviewed-by: Fabrizio Castro <fabrizio.castro@...>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@...>
Signed-off-by: Simon Horman <horms+renesas@...>
(cherry picked from commit 0ed33948cb43193ba3dbdff8e521f84326669405)
Signed-off-by: Biju Das <biju.das@...>
Reviewed-by: Fabrizio Castro <fabrizio.castro@...>
---
arch/arm/boot/dts/iwg20d-q7-common.dtsi | 27 +++++++++++++++++++++++++--
1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/iwg20d-q7-common.dtsi b/arch/arm/boot/dts/iwg20d-q7-common.dtsi
index 937c6fe..6920e3f 100644
--- a/arch/arm/boot/dts/iwg20d-q7-common.dtsi
+++ b/arch/arm/boot/dts/iwg20d-q7-common.dtsi
@@ -8,6 +8,29 @@
* kind, whether express or implied.
*/

+/*
+ * SSI-SGTL5000
+ *
+ * This command is required when Playback/Capture
+ *
+ * amixer set "DVC Out" 100%
+ * amixer set "DVC In" 100%
+ *
+ * You can use Mute
+ *
+ * amixer set "DVC Out Mute" on
+ * amixer set "DVC In Mute" on
+ *
+ * You can use Volume Ramp
+ *
+ * amixer set "DVC Out Ramp Up Rate" "0.125 dB/64 steps"
+ * amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
+ * amixer set "DVC Out Ramp" on
+ * aplay xxx.wav &
+ * amixer set "DVC Out" 80% // Volume Down
+ * amixer set "DVC Out" 100% // Volume Up
+ */
+
/ {
aliases {
serial0 = &scif0;
@@ -202,8 +225,8 @@

rcar_sound,dai {
dai0 {
- playback = <&ssi1 &src3>;
- capture = <&ssi0 &src2>;
+ playback = <&ssi1 &src3 &dvc1>;
+ capture = <&ssi0 &src2 &dvc0>;
};
};
};
--
2.7.4

Join cip-dev@lists.cip-project.org to automatically receive all group messages.