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, 127 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0294-media-bcm2835-unicam-Set-VPU-min-clock-freq-to-250Mh.patch b/target/linux/bcm27xx/patches-5.10/950-0294-media-bcm2835-unicam-Set-VPU-min-clock-freq-to-250Mh.patch
new file mode 100644
index 0000000000..7fd337edb8
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0294-media-bcm2835-unicam-Set-VPU-min-clock-freq-to-250Mh.patch
@@ -0,0 +1,127 @@
+From d839c8936020f393c5536d83b783198217243e8d Mon Sep 17 00:00:00 2001
+From: Naushir Patuck <naush@raspberrypi.com>
+Date: Mon, 11 May 2020 13:02:22 +0100
+Subject: [PATCH] media: bcm2835: unicam: Set VPU min clock freq to
+ 250Mhz.
+
+When streaming with Unicam, the VPU must have a clock frequency of at
+least 250Mhz.  Otherwise, the input fifos could overrun, causing
+image corruption.
+
+Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
+---
+ .../media/platform/bcm2835/bcm2835-unicam.c   | 49 +++++++++++++++++--
+ 1 file changed, 44 insertions(+), 5 deletions(-)
+
+--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
++++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
+@@ -89,6 +89,11 @@ MODULE_PARM_DESC(debug, "Debug level 0-3
+ 		v4l2_err(&(dev)->v4l2_dev, fmt, ##arg)
+ 
+ /*
++ * Unicam must request a minimum of 250Mhz from the VPU clock.
++ * Otherwise the input FIFOs overrun and cause image corruption.
++ */
++#define MIN_VPU_CLOCK_RATE (250 * 1000 * 1000)
++/*
+  * To protect against a dodgy sensor driver never returning an error from
+  * enum_mbus_code, set a maximum index value to be used.
+  */
+@@ -417,8 +422,10 @@ struct unicam_device {
+ 	void __iomem *base;
+ 	/* clock gating base address */
+ 	void __iomem *clk_gate_base;
+-	/* clock handle */
++	/* lp clock handle */
+ 	struct clk *clock;
++	/* vpu clock handle */
++	struct clk *vpu_clock;
+ 	/* V4l2 device */
+ 	struct v4l2_device v4l2_dev;
+ 	struct media_device mdev;
+@@ -1678,16 +1685,28 @@ static int unicam_start_streaming(struct
+ 	unicam_dbg(1, dev, "Running with %u data lanes\n",
+ 		   dev->active_data_lanes);
+ 
+-	ret = clk_set_rate(dev->clock, 100 * 1000 * 1000);
++	ret = clk_set_min_rate(dev->vpu_clock, MIN_VPU_CLOCK_RATE);
++	if (ret) {
++		unicam_err(dev, "failed to set up VPU clock\n");
++		goto err_pm_put;
++	}
++
++	ret = clk_prepare_enable(dev->vpu_clock);
+ 	if (ret) {
+-		unicam_err(dev, "failed to set up clock\n");
++		unicam_err(dev, "Failed to enable VPU clock: %d\n", ret);
+ 		goto err_pm_put;
+ 	}
+ 
++	ret = clk_set_rate(dev->clock, 100 * 1000 * 1000);
++	if (ret) {
++		unicam_err(dev, "failed to set up CSI clock\n");
++		goto err_vpu_clock;
++	}
++
+ 	ret = clk_prepare_enable(dev->clock);
+ 	if (ret) {
+ 		unicam_err(dev, "Failed to enable CSI clock: %d\n", ret);
+-		goto err_pm_put;
++		goto err_vpu_clock;
+ 	}
+ 
+ 	for (i = 0; i < ARRAY_SIZE(dev->node); i++) {
+@@ -1721,6 +1740,11 @@ static int unicam_start_streaming(struct
+ err_disable_unicam:
+ 	unicam_disable(dev);
+ 	clk_disable_unprepare(dev->clock);
++err_vpu_clock:
++	ret = clk_set_min_rate(dev->vpu_clock, 0);
++	if (ret)
++		unicam_err(dev, "failed to reset the VPU clock\n");
++	clk_disable_unprepare(dev->vpu_clock);
+ err_pm_put:
+ 	unicam_runtime_put(dev);
+ err_streaming:
+@@ -1738,6 +1762,8 @@ static void unicam_stop_streaming(struct
+ 	node->streaming = false;
+ 
+ 	if (node->pad_id == IMAGE_PAD) {
++		int ret;
++
+ 		/*
+ 		 * Stop streaming the sensor and disable the peripheral.
+ 		 * We cannot continue streaming embedded data with the
+@@ -1747,6 +1773,12 @@ static void unicam_stop_streaming(struct
+ 			unicam_err(dev, "stream off failed in subdev\n");
+ 
+ 		unicam_disable(dev);
++
++		ret = clk_set_min_rate(dev->vpu_clock, 0);
++		if (ret)
++			unicam_err(dev, "failed to reset the min VPU clock\n");
++
++		clk_disable_unprepare(dev->vpu_clock);
+ 		clk_disable_unprepare(dev->clock);
+ 		unicam_runtime_put(dev);
+ 
+@@ -2750,11 +2782,18 @@ static int unicam_probe(struct platform_
+ 
+ 	unicam->clock = devm_clk_get(&pdev->dev, "lp");
+ 	if (IS_ERR(unicam->clock)) {
+-		unicam_err(unicam, "Failed to get clock\n");
++		unicam_err(unicam, "Failed to get lp clock\n");
+ 		ret = PTR_ERR(unicam->clock);
+ 		goto err_unicam_put;
+ 	}
+ 
++	unicam->vpu_clock = devm_clk_get(&pdev->dev, "vpu");
++	if (IS_ERR(unicam->vpu_clock)) {
++		unicam_err(unicam, "Failed to get vpu clock\n");
++		ret = PTR_ERR(unicam->vpu_clock);
++		goto err_unicam_put;
++	}
++
+ 	ret = platform_get_irq(pdev, 0);
+ 	if (ret <= 0) {
+ 		dev_err(&pdev->dev, "No IRQ resource\n");