openwrt/target/linux/bcm27xx/patches-5.4/950-0585-drm-vc4-hdmi-Add-CEC-support-flag.patch

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;