brcm2708: update linux 4.4 patches to latest version

As usual these patches were extracted and rebased from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Also adds support for Raspberry Pi Compute Module 3 (untested).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 0 insertions, 115 deletions

diff --git a/target/linux/brcm2708/patches-4.4/0398-dmaengine-bcm2835-limit-max-length-based-on-channel-.patch b/target/linux/brcm2708/patches-4.4/0398-dmaengine-bcm2835-limit-max-length-based-on-channel-.patch
deleted file mode 100644
index e679850e5a..0000000000
--- a/target/linux/brcm2708/patches-4.4/0398-dmaengine-bcm2835-limit-max-length-based-on-channel-.patch
+++ /dev/null
@@ -1,115 +0,0 @@
-From 930015dce415e4203daeafb09c24759ac883613e Mon Sep 17 00:00:00 2001
-From: Martin Sperl <kernel@martin.sperl.org>
-Date: Wed, 16 Mar 2016 12:25:00 -0700
-Subject: [PATCH 398/423] dmaengine: bcm2835: limit max length based on channel
- type
-
-The bcm2835 dma system has 2 basic types of dma-channels:
-* "normal" channels
-* "light" channels
-
-Lite channels are limited in several aspects:
-* internal data-structure is 128 bit (not 256)
-* does not support BCM2835_DMA_TDMODE (2D)
-* DMA length register is limited to 16 bit.
-  so 0-65535 (not 0-65536 as mentioned in the official datasheet)
-* BCM2835_DMA_S/D_IGNORE are not supported
-
-The detection of the type of mode is implemented by looking at
-the LITE bit in the DEBUG register for each channel.
-This allows automatic detection.
-
-Based on this the maximum block size is set to (64K - 4) or to 1G
-and this limit is honored during generation of control block
-chains. The effect is that when a LITE channel is used more
-control blocks are used to do the same transfer (compared
-to a normal channel).
-
-As there are several sources/target DREQS that are 32 bit wide
-we need to have the transfer to be a multiple of 4 as this would
-break the transfer otherwise.
-
-This is why the limit of (64K - 4) was chosen over the
-alternative of (64K - 4K).
-
-Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
-Reviewed-by: Eric Anholt <eric@anholt.net>
-Signed-off-by: Eric Anholt <eric@anholt.net>
-Signed-off-by: Vinod Koul <vinod.koul@intel.com>
----
- drivers/dma/bcm2835-dma.c | 29 ++++++++++++++++++++++++++---
- 1 file changed, 26 insertions(+), 3 deletions(-)
-
---- a/drivers/dma/bcm2835-dma.c
-+++ b/drivers/dma/bcm2835-dma.c
-@@ -81,6 +81,8 @@ struct bcm2835_chan {
- 
- 	void __iomem *chan_base;
- 	int irq_number;
-+
-+	bool is_lite_channel;
- };
- 
- struct bcm2835_desc {
-@@ -169,6 +171,16 @@ struct bcm2835_desc {
- #define BCM2835_DMA_CHAN(n)	((n) << 8) /* Base address */
- #define BCM2835_DMA_CHANIO(base, n) ((base) + BCM2835_DMA_CHAN(n))
- 
-+/* the max dma length for different channels */
-+#define MAX_DMA_LEN SZ_1G
-+#define MAX_LITE_DMA_LEN (SZ_64K - 4)
-+
-+static inline size_t bcm2835_dma_max_frame_length(struct bcm2835_chan *c)
-+{
-+	/* lite and normal channels have different max frame length */
-+	return c->is_lite_channel ? MAX_LITE_DMA_LEN : MAX_DMA_LEN;
-+}
-+
- /* how many frames of max_len size do we need to transfer len bytes */
- static inline size_t bcm2835_dma_frames_for_length(size_t len,
- 						   size_t max_len)
-@@ -217,8 +229,10 @@ static void bcm2835_dma_create_cb_set_le
- 	size_t *total_len,
- 	u32 finalextrainfo)
- {
--	/* set the length */
--	control_block->length = len;
-+	size_t max_len = bcm2835_dma_max_frame_length(chan);
-+
-+	/* set the length taking lite-channel limitations into account */
-+	control_block->length = min_t(u32, len, max_len);
- 
- 	/* finished if we have no period_length */
- 	if (!period_len)
-@@ -544,6 +558,7 @@ static struct dma_async_tx_descriptor *b
- 	dma_addr_t src, dst;
- 	u32 info = BCM2835_DMA_WAIT_RESP;
- 	u32 extra = BCM2835_DMA_INT_EN;
-+	size_t max_len = bcm2835_dma_max_frame_length(c);
- 	size_t frames;
- 
- 	/* Grab configuration */
-@@ -586,7 +601,10 @@ static struct dma_async_tx_descriptor *b
- 	}
- 
- 	/* calculate number of frames */
--	frames = DIV_ROUND_UP(buf_len, period_len);
-+	frames = /* number of periods */
-+		 DIV_ROUND_UP(buf_len, period_len) *
-+		 /* number of frames per period */
-+		 bcm2835_dma_frames_for_length(period_len, max_len);
- 
- 	/*
- 	 * allocate the CB chain
-@@ -685,6 +703,11 @@ static int bcm2835_dma_chan_init(struct
- 	c->ch = chan_id;
- 	c->irq_number = irq;
- 
-+	/* check in DEBUG register if this is a LITE channel */
-+	if (readl(c->chan_base + BCM2835_DMA_DEBUG) &
-+		BCM2835_DMA_DEBUG_LITE)
-+		c->is_lite_channel = true;
-+
- 	return 0;
- }
-