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From: zonque@gmail.com (Daniel Mack)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 04/12] dma: mmp_pdma: fix maximum transfer length
Date: Wed,  7 Aug 2013 12:19:22 +0200	[thread overview]
Message-ID: <1375870770-14263-5-git-send-email-zonque@gmail.com> (raw)
In-Reply-To: <1375870770-14263-1-git-send-email-zonque@gmail.com>

There's no reason for limiting the maximum transfer length to 0x1000.
Take the actual bit mask instead; the PDMA is able to transfer chunks of
up to SZ_8K - 1.

Signed-off-by: Daniel Mack <zonque@gmail.com>
---
 drivers/dma/mmp_pdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
index 8d6aae3..1fe78d8 100644
--- a/drivers/dma/mmp_pdma.c
+++ b/drivers/dma/mmp_pdma.c
@@ -71,7 +71,7 @@
 #define DCMD_LENGTH	0x01fff		/* length mask (max = 8K - 1) */
 
 #define PDMA_ALIGNMENT		3
-#define PDMA_MAX_DESC_BYTES	0x1000
+#define PDMA_MAX_DESC_BYTES	DCMD_LENGTH
 
 struct mmp_pdma_desc_hw {
 	u32 ddadr;	/* Points to the next descriptor + flags */
-- 
1.8.3.1

  parent reply	other threads:[~2013-08-07 10:19 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-07 10:19 [PATCH 00/12] dma: pdma: some patches needed for PXA DT environments Daniel Mack
2013-08-07 10:19 ` [PATCH 01/12] dma: mmp_pdma: add protect when alloc/free phy channels Daniel Mack
2013-08-07 12:40   ` Ezequiel Garcia
2013-08-07 12:42     ` Daniel Mack
2013-08-08  8:35     ` Daniel Mack
2013-08-07 10:19 ` [PATCH 02/12] dma: mmp_pdma: clear DRCMR when free a phy channel Daniel Mack
2013-08-07 10:19 ` [PATCH 03/12] dma: mmp_pdma: factor out DRCMR register calculation Daniel Mack
2013-08-07 10:19 ` Daniel Mack [this message]
2013-08-07 10:19 ` [PATCH 05/12] dma: mmp_pdma: add filter function Daniel Mack
2013-08-07 10:19 ` [PATCH 06/12] dma: mmp_pdma: make the controller a DMA provider Daniel Mack
2013-08-07 16:12   ` Arnd Bergmann
2013-08-07 16:17     ` Daniel Mack
2013-08-07 20:17       ` Arnd Bergmann
2013-08-08  8:38     ` Daniel Mack
2013-08-09 13:10     ` Daniel Mack
2013-08-09 14:32       ` zhangfei gao
2013-08-09 21:08         ` Arnd Bergmann
2013-08-07 10:19 ` [PATCH 07/12] dma: mmp_pdma: print the number of channels at probe time Daniel Mack
2013-08-07 10:19 ` [PATCH 08/12] dma: mmp_pdma: remove duplicate assignment Daniel Mack
2013-08-07 10:19 ` [PATCH 09/12] dma: mmp_pdma: add support for byte-aligned transfers Daniel Mack
2013-08-08  9:04   ` Xiang Wang
2013-08-08  9:11     ` Daniel Mack
2013-08-16  8:05       ` Xiang Wang
2013-08-07 10:19 ` [PATCH 10/12] dma: mmp_pdma: implement DMA_PAUSE and DMA_RESUME Daniel Mack
2013-08-07 10:19 ` [PATCH 11/12] dma: mmp_pdma: add support for residue reporting Daniel Mack
2013-08-07 10:19 ` [PATCH 12/12] dma: mmp_pdma: add support for cyclic DMA descriptors Daniel Mack

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