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
next prev 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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