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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0591-drm-vc4-hdmi-Add-an-audio-support-flag.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0591-drm-vc4-hdmi-Add-an-audio-support-flag.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0591-drm-vc4-hdmi-Add-an-audio-support-flag.patch b/target/linux/bcm27xx/patches-5.4/950-0591-drm-vc4-hdmi-Add-an-audio-support-flag.patch
new file mode 100644
index 0000000000..cc6cd86887
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0591-drm-vc4-hdmi-Add-an-audio-support-flag.patch
@@ -0,0 +1,47 @@
+From 6154f7383e2defe48eea7fddb6ce646a0069828b Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Thu, 6 Feb 2020 16:21:45 +0100
+Subject: [PATCH] drm/vc4: hdmi: Add an audio support flag
+
+The BCM2711 audio support doesn't work yet, so let's add a boolean to
+indicate whether or not it's supported, and only register a sound card if
+that boolean is set.
+
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/gpu/drm/vc4/vc4_hdmi.c | 4 ++++
+ drivers/gpu/drm/vc4/vc4_hdmi.h | 3 +++
+ 2 files changed, 7 insertions(+)
+
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
+@@ -944,6 +944,9 @@ static int vc4_hdmi_audio_init(struct vc
+ int ret;
+ int len;
+
++ if (!vc4_hdmi->variant->audio_available)
++ return 0;
++
+ if (!of_find_property(dev->of_node, "dmas", &len) ||
+ len == 0) {
+ dev_warn(dev,
+@@ -1444,6 +1447,7 @@ static int vc4_hdmi_dev_remove(struct pl
+ }
+
+ static const struct vc4_hdmi_variant bcm2835_variant = {
++ .audio_available = true,
+ .registers = vc4_hdmi_fields,
+ .num_registers = ARRAY_SIZE(vc4_hdmi_fields),
+
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
+@@ -32,6 +32,9 @@ struct vc4_hdmi_variant {
+ */
+ unsigned int id;
+
++ /* Set to true when the audio support is available */
++ bool audio_available;
++
+ /* List of the registers available on that variant */
+ const struct vc4_hdmi_register *registers;
+