target/linux/brcm2708/patches-4.4/0021-dmaengine-bcm2835-set-residue_granularity-field.patch

   1 From b6906312ccc7e18a0d8608c1d1bc318ab6f84656 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
   3 Date: Sat, 3 Oct 2015 15:58:59 +0200
   4 Subject: [PATCH 021/156] dmaengine: bcm2835: set residue_granularity field
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 bcm2835-dma supports residue reporting at burst level but didn't report
  10 this via the residue_granularity field.
  11
  12 Without this field set properly we get playback issues with I2S cards.
  13
  14 [by HiassofT, taken from bcm2708-dmaengine]
  15 Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
  16 ---
  17  drivers/dma/bcm2835-dma.c | 1 +
  18  1 file changed, 1 insertion(+)
  19
  20 --- a/drivers/dma/bcm2835-dma.c
  21 +++ b/drivers/dma/bcm2835-dma.c
  22 @@ -802,6 +802,7 @@ static int bcm2835_dma_probe(struct plat
  23         od->ddev.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
  24         od->ddev.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
  25         od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
  26 +       od->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
  27         od->ddev.dev = &pdev->dev;
  28         INIT_LIST_HEAD(&od->ddev.channels);
  29         spin_lock_init(&od->lock);