From: zonque@gmail.com (Daniel Mack)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 03/11] dma: mmp_pdma: fix maximum transfer length
Date: Sat, 10 Aug 2013 18:52:17 +0200 [thread overview]
Message-ID: <1376153545-14361-4-git-send-email-zonque@gmail.com> (raw)
In-Reply-To: <1376153545-14361-1-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 f253695..9d6410e 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:[~2013-08-10 16:52 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-10 16:52 [PATCH v2 00/11] dma: pdma: some patches needed for PXA DT environments Daniel Mack
2013-08-10 16:52 ` [PATCH v2 01/11] dma: mmp_pdma: factor out DRCMR register calculation Daniel Mack
2013-08-10 16:52 ` [PATCH v2 02/11] dma: mmp_pdma: refactor unlocking path in lookup_phy() Daniel Mack
2013-08-10 16:52 ` Daniel Mack [this message]
2013-08-10 16:52 ` [PATCH v2 04/11] dma: mmp_pdma: add filter function Daniel Mack
2013-08-10 16:52 ` [PATCH v2 05/11] dma: mmp_pdma: make the controller a DMA provider Daniel Mack
2013-08-10 16:52 ` [PATCH v2 06/11] dma: mmp_pdma: print the number of channels at probe time Daniel Mack
2013-08-10 16:52 ` [PATCH v2 07/11] dma: mmp_pdma: remove duplicate assignment Daniel Mack
2013-08-10 16:52 ` [PATCH v2 08/11] dma: mmp_pdma: add support for byte-aligned transfers Daniel Mack
2013-08-10 16:52 ` [PATCH v2 09/11] dma: mmp_pdma: implement DMA_PAUSE and DMA_RESUME Daniel Mack
2013-08-14 8:15 ` Vinod Koul
2013-08-14 9:02 ` Daniel Mack
2013-08-14 8:30 ` Vinod Koul
2013-08-10 16:52 ` [PATCH v2 10/11] dma: mmp_pdma: add support for residue reporting Daniel Mack
2013-08-14 8:19 ` Vinod Koul
2013-08-10 16:52 ` [PATCH v2 11/11] dma: mmp_pdma: add support for cyclic DMA descriptors Daniel Mack
2013-08-10 17:18 ` [PATCH v2 00/11] dma: pdma: some patches needed for PXA DT environments Daniel Mack
2013-08-14 8:28 ` Vinod Koul
2013-08-10 21:25 ` Arnd Bergmann
2013-08-13 21:56 ` Daniel Mack
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