525b311bf8
As usual these patches were extracted from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
29 lines
1.1 KiB
Diff
29 lines
1.1 KiB
Diff
From 6018cc9ef34ff7c465cf5c7674de004facf9bec8 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
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Date: Sat, 3 Oct 2015 15:58:59 +0200
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Subject: [PATCH 021/304] dmaengine: bcm2835: set residue_granularity field
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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bcm2835-dma supports residue reporting at burst level but didn't report
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this via the residue_granularity field.
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Without this field set properly we get playback issues with I2S cards.
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[by HiassofT, taken from bcm2708-dmaengine]
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Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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---
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drivers/dma/bcm2835-dma.c | 1 +
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1 file changed, 1 insertion(+)
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--- a/drivers/dma/bcm2835-dma.c
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+++ b/drivers/dma/bcm2835-dma.c
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@@ -802,6 +802,7 @@ static int bcm2835_dma_probe(struct plat
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od->ddev.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
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od->ddev.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
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od->ddev.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
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+ od->ddev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
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od->ddev.dev = &pdev->dev;
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INIT_LIST_HEAD(&od->ddev.channels);
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spin_lock_init(&od->lock);
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