Re: [PATCH] arm64: dts: rockchip: add rock-pi-4 analog audio

From: Alex Bee
Date: Tue Jun 29 2021 - 13:45:02 EST

Hi Adrian, Hi Robin
Am 29.06.21 um 17:42 schrieb Robin Murphy:
On 2021-06-29 16:07, Adrian Ratiu wrote:
Hi Alex,

On Tue, 29 Jun 2021, Alex Bee <knaerzche@xxxxxxxxx> wrote:
Hi Adrian,
I've submitted similar patch already. Its part of [1]

Thank you for pointing out your patch, I was not aware of it as it was not merged yet (I tested latest linux-next).

It is a good sign that our code is almost identical except for the headphone detect pin which you mention.


There is no headphone detection pin in the schematics, btw.

There are two reasons I added it:

1. The es8316 codec failed to probe() in my testing unless the irq was defined. That might have been due to me testing the codec directly with the simple card driver instead of the graph driver.

Point 1 doesn't appear to be an issue anymore, the codec + graph driver probe correctly and audio supposedly (see below) works even without the irq.
I guess that just a "warning" that doesn't mean the driver failed to probe. (It the same for RockPro64, for example - where the interrupt line isn't connected as well)

2. I got the gpio bank 1 pin 0 location from various headphone detection commits in the vendor v4.4 kernel, like for example [1].

Are you 100% sure there is no hp detection pin wired on the rock-pi-4?
Even if it might be missing from the schematics, the vendor driver code apparently defines and uses it?

FWIW according to the schematics it *is* wired up on the Model C board, but not on the Model A or B.

Thanks for the pointer, I did look at v1.3 only, tbh.

I'm not sure I understand why we should pull up this pin.

Shouldn't we better use hp-det-gpio property of audio-graph-card to make real use of this pin?

Robin.

 From booting with the irq defined I get the following in /proc/interrupts however I'm having an unrelated difficulty testing because the audio connector literally broke off the board like in [2].
90: 1  0  0  0  0  rockchip_gpio_irq   0 Level     es8316
According to the Model C schematics the codec interrupt (HP_INT) is connected to GPIO1_PA1 (in contrast to GPIO1_PA0 which is used for hp detection).

If you're OK I'll update my series and add those pins for Model C only (and will request the schematics of A+ and B+ which seem not to be published yet to check out what the manufacturer decided for those variants)

Alex

Team Radxa was very nice in offering me a replacement but until that arrives I can't test this anymore.

[1] https://github.com/radxa/kernel/commit/e945cad5c3ec82d171760465d3c7a84bb10ed1b7

[2] https://forum.radxa.com/t/audio-jack-broke-off/935

[1] https://patchwork.kernel.org/project/linux-rockchip/cover/20210618181256.27992-1-knaerzche@xxxxxxxxx/

Best,

Alex

Am 28.06.21 um 13:30 schrieb Adrian Ratiu:
This adds the necessary pinctrl and nodes to enable the
analog audio on rk3399 rock-pi-4 SBCs using the es8316
codec and the audio-graph-card driver.

Signed-off-by: Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx>
---
  .../boot/dts/rockchip/rk3399-rock-pi-4.dtsi   | 38 +++++++++++++++++++
  1 file changed, 38 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
index b28888ea9262..77781d9150ac 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi
@@ -128,6 +128,12 @@ vdd_log: vdd-log {
          regulator-max-microvolt = <1400000>;
          vin-supply = <&vcc5v0_sys>;
      };
+
+    sound {
+        compatible = "audio-graph-card";
+        label = "rockchip,rk3399";
+        dais = <&i2s0_p0>;
+    };
  };
  &cpu_l0 {
@@ -422,6 +428,24 @@ &i2c1 {
      i2c-scl-rising-time-ns = <300>;
      i2c-scl-falling-time-ns = <15>;
      status = "okay";
+
+    es8316: codec@11 {
+        compatible = "everest,es8316";
+        reg = <0x11>;
+        clocks = <&cru SCLK_I2S_8CH_OUT>;
+        clock-names = "mclk";
+        pinctrl-names = "default";
+        pinctrl-0 = <&hp_det_pin>;
+        interrupt-parent = <&gpio1>;
+        interrupts = <RK_PA0 IRQ_TYPE_LEVEL_HIGH>;
+        #sound-dai-cells = <0>;
+
+        port {
+            es8316_p0_0: endpoint {
+                remote-endpoint = <&i2s0_p0_0>;
+            };
+        };
+    };
  };
  &i2c3 {
@@ -441,6 +465,14 @@ &i2s0 {
      rockchip,capture-channels = <2>;
      rockchip,playback-channels = <2>;
      status = "okay";
+
+    i2s0_p0: port {
+        i2s0_p0_0: endpoint {
+            dai-format = "i2s";
+            mclk-fs = <256>;
+            remote-endpoint = <&es8316_p0_0>;
+        };
+    };
  };
  &i2s1 {
@@ -556,6 +588,12 @@ wifi_host_wake_l: wifi-host-wake-l {
              rockchip,pins = <0 RK_PA3 RK_FUNC_GPIO &pcfg_pull_none>;
          };
      };
+
+    es8316 {
+        hp_det_pin: hp-det-pin {
+            rockchip,pins = <1 RK_PA0 RK_FUNC_GPIO &pcfg_pull_up>;
+        };
+    };
  };
  &pwm2 {

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