bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0582-drm-vc4-hdmi-Deal-with-multiple-debugfs-files.patch b/target/linux/bcm27xx/patches-5.4/950-0582-drm-vc4-hdmi-Deal-with-multiple-debugfs-files.patch
new file mode 100644
index 0000000000..e25b18a21f
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0582-drm-vc4-hdmi-Deal-with-multiple-debugfs-files.patch
@@ -0,0 +1,33 @@
+From a1f24e24c065b91f833e3f546c1507f69fb04bc7 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Thu, 16 Jan 2020 14:27:56 +0100
+Subject: [PATCH] drm/vc4: hdmi: Deal with multiple debugfs files
+
+The HDMI driver was registering a single debugfs file so far with the name
+hdmi_regs.
+
+Obviously, this is not going to work anymore when will have multiple HDMI
+controllers since we will end up trying to register two files with the same
+name.
+
+Let's use the ID to avoid that name conflict.
+
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/gpu/drm/vc4/vc4_hdmi.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
+@@ -1381,7 +1381,10 @@ static int vc4_hdmi_bind(struct device *
+ 	if (ret)
+ 		goto err_destroy_encoder;
+ 
+-	vc4_debugfs_add_file(drm, "hdmi_regs", vc4_hdmi_debugfs_regs, vc4_hdmi);
++	vc4_debugfs_add_file(drm,
++			     variant->id ? "hdmi1_regs" : "hdmi_regs",
++			     vc4_hdmi_debugfs_regs,
++			     vc4_hdmi);
+ 
+ 	return 0;
+