[src/trunk]: src/sys/arch/arm/sunxi sun8icodec: Update for binding spec changes.

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0dbadb6d5ace
branches:  trunk
changeset: 372185:0dbadb6d5ace
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sat Oct 29 19:07:39 2022 +0000

description:
sun8icodec: Update for binding spec changes.

The allwinner,sun8i-a33-codec binding spec has changed[1] to allow for
#sound-dai-cells to be either 0 or 1, to allow exporting multiple DAIs
from the codec.

This change updates the driver to allow #sound-dai-cells of either 0 or 1
while still only supporting AIF1 for the time being.

[1] https://github.com/torvalds/linux/commit/880e007f15a31f446b9e1713720c6ae5a539f3f4

diffstat:

 sys/arch/arm/sunxi/sun8i_codec.c |  30 +++++++++++++++++++++++++-----
 1 files changed, 25 insertions(+), 5 deletions(-)

diffs (53 lines):

diff -r 036c9aa7a88d -r 0dbadb6d5ace sys/arch/arm/sunxi/sun8i_codec.c
--- a/sys/arch/arm/sunxi/sun8i_codec.c  Sat Oct 29 15:35:16 2022 +0000
+++ b/sys/arch/arm/sunxi/sun8i_codec.c  Sat Oct 29 19:07:39 2022 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sun8i_codec.c,v 1.9 2021/01/27 03:10:20 thorpej Exp $ */
+/* $NetBSD: sun8i_codec.c,v 1.10 2022/10/29 19:07:39 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2018 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sun8i_codec.c,v 1.9 2021/01/27 03:10:20 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sun8i_codec.c,v 1.10 2022/10/29 19:07:39 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -174,11 +174,31 @@
 sun8i_codec_dai_get_tag(device_t dev, const void *data, size_t len)
 {
        struct sun8i_codec_softc * const sc = device_private(dev);
+       const u_int sound_dai_cells = len / 4;
 
-       if (len != 4)
-               return NULL;
+       KASSERT(sound_dai_cells > 0);
 
-       return &sc->sc_dai;
+       /*
+        * This driver only supports AIF1 with CPU DAI at the moment.
+        * When #sound-dai-cells is 0, return this tag. When #sound-dai-cells
+        * is 1, return this tag only when the second cell contains the
+        * value 0.
+        *
+        * Update this when support for multiple interfaces is added to
+        * this driver.
+        */
+       if (sound_dai_cells == 1) {
+               return &sc->sc_dai;
+       }
+
+       if (sound_dai_cells == 2) {
+               const u_int iface = be32dec((const u_int *)data + 1);
+               if (iface == 0) {
+                       return &sc->sc_dai;
+               }
+       }
+
+       return NULL;
 }
 
 static struct fdtbus_dai_controller_func sun8i_codec_dai_funcs = {