target/linux/bcm27xx/patches-5.10/950-0255-snd_bcm2835-disable-HDMI-audio-when-vc4-is-used-3640.patch

   1 From d9d1244f8aa9d776073e2a12e0cb9542d89bd3cb Mon Sep 17 00:00:00 2001
   2 From: Hristo Venev <hristo@venev.name>
   3 Date: Fri, 5 Jun 2020 09:22:49 +0000
   4 Subject: [PATCH] snd_bcm2835: disable HDMI audio when vc4 is used
   5  (#3640)
   6
   7 Things don't work too well when both the vc4 driver and the firmware
   8 driver are trying to control the same audio output:
   9
  10 [  763.569406] bcm2835_audio bcm2835_audio: vchi message timeout, msg=5
  11
  12 Hence, when the vc4 HDMI driver is used, let it control audio. This is done
  13 by introducing a new device tree property to the audio node, and
  14 extending the vc4-kms-v3d overlays to set it appropriately.
  15
  16 Signed-off-by: Hristo Venev <hristo@venev.name>
  17 ---
  18  drivers/staging/vc04_services/bcm2835-audio/bcm2835.c | 4 +++-
  19  1 file changed, 3 insertions(+), 1 deletion(-)
  20
  21 --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
  22 +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
  23 @@ -381,7 +381,9 @@ static int snd_bcm2835_alsa_probe(struct
  24         }
  25
  26         if (!enable_compat_alsa) {
  27 -               set_hdmi_enables(dev);
  28 +               if (!of_property_read_bool(dev->of_node, "brcm,disable-hdmi"))
  29 +                       set_hdmi_enables(dev);
  30 +
  31                 // In this mode, always enable analog output
  32                 enable_headphones = true;
  33         } else {