1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0585-drm-vc4-hdmi-Add-CEC-support-flag.patch b/target/linux/bcm27xx/patches-5.4/950-0585-drm-vc4-hdmi-Add-CEC-support-flag.patch
new file mode 100644
index 0000000000..396e8a5523
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0585-drm-vc4-hdmi-Add-CEC-support-flag.patch
@@ -0,0 +1,47 @@
+From 0f626dc8443a93138806b4a3f351bac346036358 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Thu, 6 Feb 2020 16:22:50 +0100
+Subject: [PATCH] drm/vc4: hdmi: Add CEC support flag
+
+Similarly to the audio support, CEC support is not there yet for the
+BCM2711, so let's skip entirely the CEC initialization through a variant
+flag.
+
+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
+@@ -1187,6 +1187,9 @@ static int vc4_hdmi_cec_init(struct vc4_
+ 	u32 value;
+ 	int ret;
+ 
++	if (!vc4_hdmi->variant->cec_available)
++		return 0;
++
+ 	vc4_hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
+ 						  vc4_hdmi, "vc4",
+ 						  CEC_CAP_DEFAULTS |
+@@ -1475,6 +1478,7 @@ static int vc4_hdmi_dev_remove(struct pl
+ 
+ static const struct vc4_hdmi_variant bcm2835_variant = {
+ 	.audio_available	= true,
++	.cec_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
+@@ -35,6 +35,9 @@ struct vc4_hdmi_variant {
+ 	/* Set to true when the audio support is available */
+ 	bool audio_available;
+ 
++	/* Set to true when the CEC support is available */
++	bool cec_available;
++
+ 	/* List of the registers available on that variant */
+ 	const struct vc4_hdmi_register *registers;
+