openwrtv4/target/linux/brcm2708/patches-4.4/0390-Revert-bcm2835-dma-Limit-cyclic-transfers-on-lite-ch.patch
Álvaro Fernández Rojas 2b1c6b21b5 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>
2016-09-10 14:54:26 +02:00

35 lines
1.1 KiB
Diff

From 31c4d45f25abd0680e05775f3166ec6066e39a2a Mon Sep 17 00:00:00 2001
From: Martin Sperl <kernel@martin.sperl.org>
Date: Fri, 22 Apr 2016 17:17:22 +0000
Subject: [PATCH] Revert "bcm2835-dma: Limit cyclic transfers on lite channels
to 32k"
This reverts commit 052c2005b6ecedc5abad86632f5781adda310aa7.
---
drivers/dma/bcm2835-dma.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
--- a/drivers/dma/bcm2835-dma.c
+++ b/drivers/dma/bcm2835-dma.c
@@ -144,12 +144,6 @@ struct bcm2835_desc {
*/
#define MAX_LITE_TRANSFER (SZ_64K - 4)
-/*
- * Transfers larger than 32k cause issues with the bcm2708-i2s driver,
- * so limit transfer size to 32k as bcm2708-dmaengine did.
- */
-#define MAX_CYCLIC_LITE_TRANSFER SZ_32K
-
static inline struct bcm2835_dmadev *to_bcm2835_dma_dev(struct dma_device *d)
{
return container_of(d, struct bcm2835_dmadev, ddev);
@@ -418,7 +412,7 @@ static struct dma_async_tx_descriptor *b
d->c = c;
d->dir = direction;
if (c->ch >= 8) /* LITE channel */
- max_size = MAX_CYCLIC_LITE_TRANSFER;
+ max_size = MAX_LITE_TRANSFER;
else
max_size = MAX_NORMAL_TRANSFER;
period_len = min(period_len, max_size);