From 833b2341a6db499638d404de283a1b3c3a2a225f Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Mon, 26 Oct 2020 10:23:22 +0000
Subject: [PATCH] staging: bcm2835-audio: Add disable-headphones flag

Add a property to allow the headphone output to be disabled. Use an
integer property rather than a boolean so that an overlay can clear it.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
 drivers/staging/vc04_services/bcm2835-audio/bcm2835.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
@@ -381,11 +381,16 @@ static int snd_bcm2835_alsa_probe(struct
 	}
 
 	if (!enable_compat_alsa) {
+		// In this mode, enable analog output by default
+		u32 disable_headphones = 0;
+
 		if (!of_property_read_bool(dev->of_node, "brcm,disable-hdmi"))
 			set_hdmi_enables(dev);
 
-		// In this mode, always enable analog output
-		enable_headphones = true;
+		of_property_read_u32(dev->of_node,
+				     "brcm,disable-headphones",
+				     &disable_headphones);
+		enable_headphones = !disable_headphones;
 	} else {
 		enable_hdmi0 = enable_hdmi;
 	}
