A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 10:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

dmaengine: idma64: clear LLP_[SD]_EN bits in last descriptor

Browse source 
The datasheet requires that the user must clear LLP_[SD]_EN bits whenever
LLP.LOC is zero, i.e. in the last descriptor of a multi-block chain.

Make the driver do this.

Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Andy Shevchenko 2016-01-26 13:43:13 +02:00 • committed by Vinod Koul
commit a2826e662e
1 changed files with 3 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

3
drivers/dma/idma64.c
View file

@ -289,6 +289,9 @@ static void idma64_desc_fill(struct idma64_chan *idma64c,
/* Trigger an interrupt after the last block is transfered */
lli->ctllo |= IDMA64C_CTLL_INT_EN;
/* Disable LLP transfer in the last block */
lli->ctllo &= ~(IDMA64C_CTLL_LLP_S_EN | IDMA64C_CTLL_LLP_D_EN);
}
static struct dma_async_tx_descriptor *idma64_prep_slave_sg(