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dmaengine: at_xdmac: In at_xdmac_prep_dma_memset, treat value as a single byte

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The value passed in to .prep_dma_memset is to be treated as a single
byte repeating pattern.

Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20220301182551.883474-4-benjamin.walker@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Ben Walker 2022-03-01 11:25:50 -07:00 committed by Vinod Koul
parent ceabe10cf5
commit 3e0c06964b
1 changed files with 8 additions and 1 deletions
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9
drivers/dma/at_xdmac.c
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@ -1202,6 +1202,7 @@ static struct at_xdmac_desc *at_xdmac_memset_create_desc(struct dma_chan *chan,
unsigned long flags;
size_t ublen;
u32 dwidth;
char pattern;
/*
* WARNING: The channel configuration is set here since there is no
* dmaengine_slave_config call in this case. Moreover we don't know the
@ -1244,10 +1245,16 @@ static struct at_xdmac_desc *at_xdmac_memset_create_desc(struct dma_chan *chan,
chan_cc |= AT_XDMAC_CC_DWIDTH(dwidth);
/* Only the first byte of value is to be used according to dmaengine */
pattern = (char)value;
ublen = len >> dwidth;
desc->lld.mbr_da = dst_addr;
desc->lld.mbr_ds = value;
desc->lld.mbr_ds = (pattern << 24) |
(pattern << 16) |
(pattern << 8) |
pattern;
desc->lld.mbr_ubc = AT_XDMAC_MBR_UBC_NDV3
| AT_XDMAC_MBR_UBC_NDEN
| AT_XDMAC_MBR_UBC_NSEN