hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

dmaengine: imx-dma: configure the generic DMA type to make it work 

Commit dea7a9fbb0 ("dmaengine: imx-dma: remove dma_slave_config
direction usage") changes the method from a "configuration when called"
to an "configuration when used". Due to this, only the cyclic DMA type
gets configured correctly, while the generic DMA type is left
non-configured.

Without this additional call, the struct imxdma_channel::word_size member
is stuck at DMA_SLAVE_BUSWIDTH_UNDEFINED and imxdma_prep_slave_sg() always
returns NULL.

Signed-off-by: Juergen Borleis <jbe@pengutronix.de>
Fixes: dea7a9fbb0 ("dmaengine: imx-dma: remove dma_slave_config direction usage")
Link: https://lore.kernel.org/r/20210729071821.9857-1-jbe@pengutronix.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Juergen Borleis 2021-07-29 09:18:21 +02:00 committed by Vinod Koul
parent eda97cb095
commit 7199ddede9
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/dma/imx-dma.c
View File

@ -812,6 +812,8 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
dma_length += sg_dma_len(sg);
}
imxdma_config_write(chan, &imxdmac->config, direction);
switch (imxdmac->word_size) {
case DMA_SLAVE_BUSWIDTH_4_BYTES:
if (sg_dma_len(sgl) & 3 || sgl->dma_address & 3)