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, 34 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0954-media-bcm2835-unicam-Drop-WARN-on-uing-direct-cache-.patch b/target/linux/bcm27xx/patches-5.4/950-0954-media-bcm2835-unicam-Drop-WARN-on-uing-direct-cache-.patch
new file mode 100644
index 0000000000..481c55b649
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0954-media-bcm2835-unicam-Drop-WARN-on-uing-direct-cache-.patch
@@ -0,0 +1,34 @@
+From d535074e3e2c08ba5a6b627e54f4597f0f6f9240 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Thu, 27 Aug 2020 16:30:26 +0100
+Subject: [PATCH] media: bcm2835-unicam: Drop WARN on uing direct
+ cache alias
+
+Pi 0&1 pass all ARM accesses through the VPU L2 cache, therefore
+the dma-ranges property sets the cache alias bits to other
+than the direct alias, hence this WARN was firing.
+
+It was overprotective coding, so assume that everything is OK
+with the dma-ranges, and remove the WARN.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/media/platform/bcm2835/bcm2835-unicam.c | 7 -------
+ 1 file changed, 7 deletions(-)
+
+--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
++++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
+@@ -708,13 +708,6 @@ static void unicam_wr_dma_addr(struct un
+ {
+ 	dma_addr_t endaddr = dmaaddr + buffer_size;
+ 
+-	/*
+-	 * dmaaddr and endaddr should be a 32-bit address with the top two bits
+-	 * set to 0x3 to signify uncached access through the Videocore memory
+-	 * controller.
+-	 */
+-	WARN_ON((dmaaddr >> 30) != 0x3 || (endaddr >> 30) != 0x3);
+-
+ 	if (pad_id == IMAGE_PAD) {
+ 		reg_write(dev, UNICAM_IBSA0, dmaaddr);
+ 		reg_write(dev, UNICAM_IBEA0, endaddr);