brcm2708: rename all patches from raspberrypi git tree to use 950 prefix

Right now all brcm2708 patches are extracted from the non-mainline
raspberrypi/linux git tree. Many of them are hacks and/or are unneeded
in LEDE. Raspberry Pi is getting better and better mainline support so
it would be nice to finally start maintaining patches in a cleaner way:
1) Backport patches accepted in upstream tree
2) Start using upstream drivers
3) Pick only these patches that are needed for more complete support

Handling above tasks requires grouping patches - ideally using the same
prefixes as generic ones. It means we should rename existing patches to
use some high prefix. This will allow e.g. use 0xx for backported code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Stijn Tintel <stijn@linux-ipv6.be>

1 files changed, 39 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.9/950-0187-dmaengine-bcm2835-Fix-cyclic-DMA-period-splitting.patch b/target/linux/brcm2708/patches-4.9/950-0187-dmaengine-bcm2835-Fix-cyclic-DMA-period-splitting.patch
new file mode 100644
index 0000000000..fa0d998a2d
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.9/950-0187-dmaengine-bcm2835-Fix-cyclic-DMA-period-splitting.patch
@@ -0,0 +1,39 @@
+From 9fd7a158ec098ab05b8d3ec2c2973b3dc7e498f3 Mon Sep 17 00:00:00 2001
+From: Matthias Reichl <hias@horus.com>
+Date: Mon, 20 Feb 2017 20:01:16 +0100
+Subject: [PATCH] dmaengine: bcm2835: Fix cyclic DMA period splitting
+
+The code responsible for splitting periods into chunks that
+can be handled by the DMA controller missed to update total_len,
+the number of bytes processed in the current period, when there
+are more chunks to follow.
+
+Therefore total_len was stuck at 0 and the code didn't work at all.
+This resulted in a wrong control block layout and audio issues because
+the cyclic DMA callback wasn't executing on period boundaries.
+
+Fix this by adding the missing total_len update.
+
+Signed-off-by: Matthias Reichl <hias@horus.com>
+Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
+Tested-by: Clive Messer <clive.messer@digitaldreamtime.co.uk>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/dma/bcm2835-dma.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+--- a/drivers/dma/bcm2835-dma.c
++++ b/drivers/dma/bcm2835-dma.c
+@@ -253,8 +253,11 @@ static void bcm2835_dma_create_cb_set_le
+ 	 */
+ 
+ 	/* have we filled in period_length yet? */
+-	if (*total_len + control_block->length < period_len)
++	if (*total_len + control_block->length < period_len) {
++		/* update number of bytes in this period so far */
++		*total_len += control_block->length;
+ 		return;
++	}
+ 
+ 	/* calculate the length that remains to reach period_length */
+ 	control_block->length = period_len - *total_len;