diff options
| author |   Ben Walker <benjamin.walker@intel.com> | 2022-03-01 11:25:50 -0700 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2022-04-20 17:28:12 +0530 |
| commit | 3e0c06964bfcc8271a07065709452fcbc44e70b0 (patch) | |
| tree | 196c5a3fa0b80ef4a9907f98e378edc863e28c84 | |
| parent | dmaengine: at_hdmac: In atc_prep_dma_memset, treat value as a single byte (diff) | |
| download | linux-dev-3e0c06964bfcc8271a07065709452fcbc44e70b0.tar.xz linux-dev-3e0c06964bfcc8271a07065709452fcbc44e70b0.zip | |
dmaengine: at_xdmac: In at_xdmac_prep_dma_memset, treat value as a single byte
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>
| -rw-r--r-- | drivers/dma/at_xdmac.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index 1476156af74b..1911861a39fa 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -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 |