bcm27xx: add kernel 5.10 support

Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted
patches, wireless patches and defconfig patches.

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

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

1 files changed, 54 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0665-drm-vc4-Notify-the-firmware-when-DRM-is-in-charge.patch b/target/linux/bcm27xx/patches-5.10/950-0665-drm-vc4-Notify-the-firmware-when-DRM-is-in-charge.patch
new file mode 100644
index 0000000000..6bb1f6fd32
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0665-drm-vc4-Notify-the-firmware-when-DRM-is-in-charge.patch
@@ -0,0 +1,54 @@
+From 154a12e5c0d417cae205b8e16431f29c627311e6 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Wed, 23 Jun 2021 11:54:58 +0200
+Subject: [PATCH] drm/vc4: Notify the firmware when DRM is in charge
+
+Once the call to drm_fb_helper_remove_conflicting_framebuffers() has
+been made, simplefb has been unregistered and the KMS driver is entirely
+in charge of the display.
+
+Thus, we can notify the firmware it can free whatever resource it was
+using to maintain simplefb functional.
+
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/gpu/drm/vc4/vc4_drv.c | 19 +++++++++++++++++++
+ 1 file changed, 19 insertions(+)
+
+--- a/drivers/gpu/drm/vc4/vc4_drv.c
++++ b/drivers/gpu/drm/vc4/vc4_drv.c
+@@ -36,6 +36,8 @@
+ #include <drm/drm_fb_helper.h>
+ #include <drm/drm_vblank.h>
+ 
++#include <soc/bcm2835/raspberrypi-firmware.h>
++
+ #include "uapi/drm/vc4_drm.h"
+ 
+ #include "vc4_drv.h"
+@@ -305,8 +307,25 @@ static int vc4_drm_bind(struct device *d
+ 	if (ret)
+ 		return ret;
+ 
++	node = of_parse_phandle(dev->of_node, "raspberrypi,firmware", 0);
++	if (node) {
++		vc4->firmware = rpi_firmware_get(dev->of_node);
++		of_node_put(node);
++
++		if (!vc4->firmware)
++			return -EPROBE_DEFER;
++	}
++
+ 	drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
+ 
++	if (vc4->firmware) {
++		ret = rpi_firmware_property(vc4->firmware,
++					    RPI_FIRMWARE_NOTIFY_DISPLAY_DONE,
++					    NULL, 0);
++		if (ret)
++			drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret);
++	}
++
+ 	ret = component_bind_all(dev, drm);
+ 	if (ret)
+ 		return ret;