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, 118 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0477-staging-rpivid-Fix-crash-when-CMA-alloc-fails.patch b/target/linux/bcm27xx/patches-5.10/950-0477-staging-rpivid-Fix-crash-when-CMA-alloc-fails.patch
new file mode 100644
index 0000000000..e47db9a43d
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0477-staging-rpivid-Fix-crash-when-CMA-alloc-fails.patch
@@ -0,0 +1,118 @@
+From 8ae4692aefa338ae3fff89c513fddd0400ea7a2a Mon Sep 17 00:00:00 2001
+From: John Cox <jc@kynesim.co.uk>
+Date: Mon, 8 Feb 2021 16:01:37 +0000
+Subject: [PATCH] staging: rpivid: Fix crash when CMA alloc fails
+
+If realloc to increase coeff size fails then attempt to re-allocate
+the original size.  If that also fails then flag a fatal error to abort
+all further decode.
+
+Signed-off-by: John Cox <jc@kynesim.co.uk>
+---
+ drivers/staging/media/rpivid/rpivid.h      |  3 ++
+ drivers/staging/media/rpivid/rpivid_h265.c | 44 +++++++++++++++++++++-
+ 2 files changed, 45 insertions(+), 2 deletions(-)
+
+--- a/drivers/staging/media/rpivid/rpivid.h
++++ b/drivers/staging/media/rpivid/rpivid.h
+@@ -88,6 +88,9 @@ struct rpivid_ctx {
+ 	struct v4l2_pix_format		src_fmt;
+ 	struct v4l2_pix_format		dst_fmt;
+ 	int dst_fmt_set;
++	// fatal_err is set if an error has occurred s.t. decode cannot
++	// continue (such as running out of CMA)
++	int fatal_err;
+ 
+ 	struct v4l2_ctrl_handler	hdl;
+ 	struct v4l2_ctrl		**ctrls;
+--- a/drivers/staging/media/rpivid/rpivid_h265.c
++++ b/drivers/staging/media/rpivid/rpivid_h265.c
+@@ -73,10 +73,18 @@ static void gptr_free(struct rpivid_dev
+ 	gptr->attrs = 0;
+ }
+ 
+-/* Realloc but do not copy */
++/* Realloc but do not copy
++ *
++ * Frees then allocs.
++ * If the alloc fails then it attempts to re-allocote the old size
++ * On error then check gptr->ptr to determine if anything is currently
++ * allocated.
++ */
+ static int gptr_realloc_new(struct rpivid_dev * const dev,
+ 			    struct rpivid_gptr * const gptr, size_t size)
+ {
++	const size_t old_size = gptr->size;
++
+ 	if (size == gptr->size)
+ 		return 0;
+ 
+@@ -88,7 +96,21 @@ static int gptr_realloc_new(struct rpivi
+ 	gptr->size = size;
+ 	gptr->ptr = dma_alloc_attrs(dev->dev, gptr->size,
+ 				    &gptr->addr, GFP_KERNEL, gptr->attrs);
+-	return gptr->ptr ? 0 : -ENOMEM;
++
++	if (!gptr->ptr) {
++		gptr->addr = 0;
++		gptr->size = old_size;
++		gptr->ptr = dma_alloc_attrs(dev->dev, gptr->size,
++					    &gptr->addr, GFP_KERNEL, gptr->attrs);
++		if (!gptr->ptr) {
++			gptr->size = 0;
++			gptr->addr = 0;
++			gptr->attrs = 0;
++		}
++		return -ENOMEM;
++	}
++
++	return 0;
+ }
+ 
+ /* floor(log2(x)) */
+@@ -2020,6 +2042,12 @@ static void phase1_thread(struct rpivid_
+ 	return;
+ 
+ fail:
++	if (!pu_gptr->addr || !coeff_gptr->addr) {
++		v4l2_err(&dev->v4l2_dev,
++			 "%s: Fatal: failed to reclaim old alloc\n",
++			 __func__);
++		ctx->fatal_err = 1;
++	}
+ 	dec_env_delete(de);
+ 	xtrace_fin(dev, de);
+ 	v4l2_m2m_buf_done_and_job_finish(dev->m2m_dev, ctx->fh.m2m_ctx,
+@@ -2093,6 +2121,9 @@ static void phase1_claimed(struct rpivid
+ 
+ 	xtrace_in(dev, de);
+ 
++	if (ctx->fatal_err)
++		goto fail;
++
+ 	de->pu_base_vc = pu_gptr->addr;
+ 	de->pu_stride =
+ 		ALIGN_DOWN(pu_gptr->size / de->pic_height_in_ctbs_y, 64);
+@@ -2116,6 +2147,14 @@ static void phase1_claimed(struct rpivid
+ 	apb_write_vc_addr_final(dev, RPI_CFBASE, de->cmd_copy_gptr->addr);
+ 
+ 	xtrace_ok(dev, de);
++	return;
++
++fail:
++	dec_env_delete(de);
++	xtrace_fin(dev, de);
++	v4l2_m2m_buf_done_and_job_finish(dev->m2m_dev, ctx->fh.m2m_ctx,
++					 VB2_BUF_STATE_ERROR);
++	xtrace_fail(dev, de);
+ }
+ 
+ static void dec_state_delete(struct rpivid_ctx *const ctx)
+@@ -2186,6 +2225,7 @@ static int rpivid_h265_start(struct rpiv
+ 	v4l2_info(&dev->v4l2_dev, "%s: (%dx%d)\n", __func__,
+ 		  ctx->dst_fmt.width, ctx->dst_fmt.height);
+ 
++	ctx->fatal_err = 0;
+ 	ctx->dec0 = NULL;
+ 	ctx->state = kzalloc(sizeof(*ctx->state), GFP_KERNEL);
+ 	if (!ctx->state) {