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, 116 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0459-drm-vc4-hdmi-Support-BCM2711-CEC-interrupt-setup.patch b/target/linux/bcm27xx/patches-5.10/950-0459-drm-vc4-hdmi-Support-BCM2711-CEC-interrupt-setup.patch
new file mode 100644
index 0000000000..1e6f1d4c0d
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0459-drm-vc4-hdmi-Support-BCM2711-CEC-interrupt-setup.patch
@@ -0,0 +1,116 @@
+From fe8bcda64e4d30cf91f2807973940873c1a577a2 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Mon, 11 Jan 2021 15:23:04 +0100
+Subject: [PATCH] drm/vc4: hdmi: Support BCM2711 CEC interrupt setup
+
+The HDMI controller found in the BCM2711 has an external interrupt
+controller for the CEC and hotplug interrupt shared between the two
+instances.
+
+Let's add a variant flag to register a single interrupt handler and
+deals with the interrupt handler setup, or two interrupt handlers
+relying on an external irqchip.
+
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/gpu/drm/vc4/vc4_hdmi.c | 42 ++++++++++++++++++++++++++--------
+ drivers/gpu/drm/vc4/vc4_hdmi.h |  7 ++++++
+ 2 files changed, 39 insertions(+), 10 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
+@@ -1722,9 +1722,11 @@ static int vc4_hdmi_cec_adap_enable(stru
+ 			   ((3600 / usecs) << VC4_HDMI_CEC_CNT_TO_3600_US_SHIFT) |
+ 			   ((3500 / usecs) << VC4_HDMI_CEC_CNT_TO_3500_US_SHIFT));
+ 
+-		HDMI_WRITE(HDMI_CEC_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC);
++		if (!vc4_hdmi->variant->external_irq_controller)
++			HDMI_WRITE(HDMI_CEC_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC);
+ 	} else {
+-		HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, VC4_HDMI_CPU_CEC);
++		if (!vc4_hdmi->variant->external_irq_controller)
++			HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, VC4_HDMI_CPU_CEC);
+ 		HDMI_WRITE(HDMI_CEC_CNTRL_5, val |
+ 			   VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
+ 	}
+@@ -1796,8 +1798,6 @@ static int vc4_hdmi_cec_init(struct vc4_
+ 	cec_fill_conn_info_from_drm(&conn_info, &vc4_hdmi->connector);
+ 	cec_s_conn_info(vc4_hdmi->cec_adap, &conn_info);
+ 
+-	HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff);
+-
+ 	value = HDMI_READ(HDMI_CEC_CNTRL_1);
+ 	/* Set the logical address to Unregistered */
+ 	value |= VC4_HDMI_CEC_ADDR_MASK;
+@@ -1805,12 +1805,32 @@ static int vc4_hdmi_cec_init(struct vc4_
+ 
+ 	vc4_hdmi_cec_update_clk_div(vc4_hdmi);
+ 
+-	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);
+-	if (ret)
+-		goto err_delete_cec_adap;
++	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);
++		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);
++		if (ret)
++			goto err_delete_cec_adap;
++	} 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);
++		if (ret)
++			goto err_delete_cec_adap;
++	}
+ 
+ 	ret = cec_register_adapter(vc4_hdmi->cec_adap, &pdev->dev);
+ 	if (ret < 0)
+@@ -2272,6 +2292,7 @@ static const struct vc4_hdmi_variant bcm
+ 		PHY_LANE_CK,
+ 	},
+ 	.unsupported_odd_h_timings	= true,
++	.external_irq_controller	= true,
+ 
+ 	.init_resources		= vc5_hdmi_init_resources,
+ 	.csc_setup		= vc5_hdmi_csc_setup,
+@@ -2298,6 +2319,7 @@ static const struct vc4_hdmi_variant bcm
+ 		PHY_LANE_2,
+ 	},
+ 	.unsupported_odd_h_timings	= true,
++	.external_irq_controller	= true,
+ 
+ 	.init_resources		= vc5_hdmi_init_resources,
+ 	.csc_setup		= vc5_hdmi_csc_setup,
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
+@@ -61,6 +61,13 @@ struct vc4_hdmi_variant {
+ 	/* The BCM2711 cannot deal with odd horizontal pixel timings */
+ 	bool unsupported_odd_h_timings;
+ 
++	/*
++	 * The BCM2711 CEC/hotplug IRQ controller is shared between the
++	 * two HDMI controllers, and we have a proper irqchip driver for
++	 * it.
++	 */
++	bool external_irq_controller;
++
+ 	/* Callback to get the resources (memory region, interrupts,
+ 	 * clocks, etc) for that variant.
+ 	 */