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, 71 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0719-udmabuf-separate-out-creating-destroying-scatter-tab.patch b/target/linux/bcm27xx/patches-5.4/950-0719-udmabuf-separate-out-creating-destroying-scatter-tab.patch
new file mode 100644
index 0000000000..5a0a59ced1
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0719-udmabuf-separate-out-creating-destroying-scatter-tab.patch
@@ -0,0 +1,71 @@
+From 118802c75e04a2f1b94245695076d2506f667ae7 Mon Sep 17 00:00:00 2001
+From: Gurchetan Singh <gurchetansingh@chromium.org>
+Date: Mon, 2 Dec 2019 17:36:26 -0800
+Subject: [PATCH] udmabuf: separate out creating/destroying
+ scatter-table
+
+Commit 17a7ce203490459cff14fb1c8f9a15d65fd1c544 upstream.
+
+These are nice functions and can be re-used.
+
+Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
+Link: http://patchwork.freedesktop.org/patch/msgid/20191203013627.85991-3-gurchetansingh@chromium.org
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+---
+ drivers/dma-buf/udmabuf.c | 26 +++++++++++++++++++-------
+ 1 file changed, 19 insertions(+), 7 deletions(-)
+
+--- a/drivers/dma-buf/udmabuf.c
++++ b/drivers/dma-buf/udmabuf.c
+@@ -47,10 +47,10 @@ static int mmap_udmabuf(struct dma_buf *
+ 	return 0;
+ }
+ 
+-static struct sg_table *map_udmabuf(struct dma_buf_attachment *at,
+-				    enum dma_data_direction direction)
++static struct sg_table *get_sg_table(struct device *dev, struct dma_buf *buf,
++				     enum dma_data_direction direction)
+ {
+-	struct udmabuf *ubuf = at->dmabuf->priv;
++	struct udmabuf *ubuf = buf->priv;
+ 	struct sg_table *sg;
+ 	int ret;
+ 
+@@ -62,7 +62,7 @@ static struct sg_table *map_udmabuf(stru
+ 					GFP_KERNEL);
+ 	if (ret < 0)
+ 		goto err;
+-	if (!dma_map_sg(at->dev, sg->sgl, sg->nents, direction)) {
++	if (!dma_map_sg(dev, sg->sgl, sg->nents, direction)) {
+ 		ret = -EINVAL;
+ 		goto err;
+ 	}
+@@ -74,13 +74,25 @@ err:
+ 	return ERR_PTR(ret);
+ }
+ 
++static void put_sg_table(struct device *dev, struct sg_table *sg,
++			 enum dma_data_direction direction)
++{
++	dma_unmap_sg(dev, sg->sgl, sg->nents, direction);
++	sg_free_table(sg);
++	kfree(sg);
++}
++
++static struct sg_table *map_udmabuf(struct dma_buf_attachment *at,
++				    enum dma_data_direction direction)
++{
++	return get_sg_table(at->dev, at->dmabuf, direction);
++}
++
+ static void unmap_udmabuf(struct dma_buf_attachment *at,
+ 			  struct sg_table *sg,
+ 			  enum dma_data_direction direction)
+ {
+-	dma_unmap_sg(at->dev, sg->sgl, sg->nents, direction);
+-	sg_free_table(sg);
+-	kfree(sg);
++	return put_sg_table(at->dev, sg, direction);
+ }
+ 
+ static void release_udmabuf(struct dma_buf *buf)