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, 106 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0675-drm-vc4-hdmi-Drop-devm-interrupt-handler-for-CEC-int.patch b/target/linux/bcm27xx/patches-5.10/950-0675-drm-vc4-hdmi-Drop-devm-interrupt-handler-for-CEC-int.patch
new file mode 100644
index 0000000000..e436a0e54b
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0675-drm-vc4-hdmi-Drop-devm-interrupt-handler-for-CEC-int.patch
@@ -0,0 +1,106 @@
+From 687a0fc86f37e0bc74c8382c0d89b0929fade1de Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Mon, 5 Jul 2021 15:47:43 +0200
+Subject: [PATCH] drm/vc4: hdmi: Drop devm interrupt handler for CEC
+ interrupts
+
+The CEC interrupt handlers are registered through the
+devm_request_threaded_irq function. However, while free_irq is indeed
+called properly when the device is unbound or bind fails, it's called
+after unbind or bind is done.
+
+In our particular case, it means that on failure it creates a window
+where our interrupt handler can be called, but we're freeing every
+resource (CEC adapter, DRM objects, etc.) it might need.
+
+In order to address this, let's switch to the non-devm variant to
+control better when the handler will be unregistered and allow us to
+make it safe.
+
+Fixes: 15b4511a4af6 ("drm/vc4: add HDMI CEC support")
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/gpu/drm/vc4/vc4_hdmi.c | 49 +++++++++++++++++++++++-----------
+ 1 file changed, 33 insertions(+), 16 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
+@@ -1903,38 +1903,46 @@ static int vc4_hdmi_cec_init(struct vc4_
+ 	vc4_hdmi_cec_update_clk_div(vc4_hdmi);
+ 
+ 	if (vc4_hdmi->variant->external_irq_controller) {
+-		ret = devm_request_threaded_irq(&pdev->dev,
+-						platform_get_irq_byname(pdev, "cec-rx"),
+-						vc4_cec_irq_handler_rx_bare,
+-						vc4_cec_irq_handler_rx_thread, 0,
+-						"vc4 hdmi cec rx", vc4_hdmi);
++		ret = request_threaded_irq(platform_get_irq_byname(pdev, "cec-rx"),
++					   vc4_cec_irq_handler_rx_bare,
++					   vc4_cec_irq_handler_rx_thread, 0,
++					   "vc4 hdmi cec rx", vc4_hdmi);
+ 		if (ret)
+ 			goto err_delete_cec_adap;
+ 
+-		ret = devm_request_threaded_irq(&pdev->dev,
+-						platform_get_irq_byname(pdev, "cec-tx"),
+-						vc4_cec_irq_handler_tx_bare,
+-						vc4_cec_irq_handler_tx_thread, 0,
+-						"vc4 hdmi cec tx", vc4_hdmi);
++		ret = request_threaded_irq(platform_get_irq_byname(pdev, "cec-tx"),
++					   vc4_cec_irq_handler_tx_bare,
++					   vc4_cec_irq_handler_tx_thread, 0,
++					   "vc4 hdmi cec tx", vc4_hdmi);
+ 		if (ret)
+-			goto err_delete_cec_adap;
++			goto err_remove_cec_rx_handler;
+ 	} else {
+ 		HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff);
+ 
+-		ret = devm_request_threaded_irq(&pdev->dev, platform_get_irq(pdev, 0),
+-						vc4_cec_irq_handler,
+-						vc4_cec_irq_handler_thread, 0,
+-						"vc4 hdmi cec", vc4_hdmi);
++		ret = request_threaded_irq(platform_get_irq(pdev, 0),
++					   vc4_cec_irq_handler,
++					   vc4_cec_irq_handler_thread, 0,
++					   "vc4 hdmi cec", vc4_hdmi);
+ 		if (ret)
+ 			goto err_delete_cec_adap;
+ 	}
+ 
+ 	ret = cec_register_adapter(vc4_hdmi->cec_adap, &pdev->dev);
+ 	if (ret < 0)
+-		goto err_delete_cec_adap;
++		goto err_remove_handlers;
+ 
+ 	return 0;
+ 
++err_remove_handlers:
++	if (vc4_hdmi->variant->external_irq_controller)
++		free_irq(platform_get_irq_byname(pdev, "cec-tx"), vc4_hdmi);
++	else
++		free_irq(platform_get_irq(pdev, 0), vc4_hdmi);
++
++err_remove_cec_rx_handler:
++	if (vc4_hdmi->variant->external_irq_controller)
++		free_irq(platform_get_irq_byname(pdev, "cec-rx"), vc4_hdmi);
++
+ err_delete_cec_adap:
+ 	cec_delete_adapter(vc4_hdmi->cec_adap);
+ 
+@@ -1943,6 +1951,15 @@ err_delete_cec_adap:
+ 
+ static void vc4_hdmi_cec_exit(struct vc4_hdmi *vc4_hdmi)
+ {
++	struct platform_device *pdev = vc4_hdmi->pdev;
++
++	if (vc4_hdmi->variant->external_irq_controller) {
++		free_irq(platform_get_irq_byname(pdev, "cec-rx"), vc4_hdmi);
++		free_irq(platform_get_irq_byname(pdev, "cec-tx"), vc4_hdmi);
++	} else {
++		free_irq(platform_get_irq(pdev, 0), vc4_hdmi);
++	}
++
+ 	cec_unregister_adapter(vc4_hdmi->cec_adap);
+ }
+ #else