diff options
| author | Frank Li <Frank.Li@nxp.com> | 2022-05-24 18:21:58 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2022-06-23 22:56:34 +0300 |
| commit | d6b03171f9fc8127b3a7adfd4e74ee5d4dae5d14 (patch) | |
| tree | f0312c58ae1ca605751f44e9a3e789f79f07e626 /drivers | |
| parent | c1e33979171da63cf47e56243ccb8ba82363c7d3 (diff) | |
| download | linux-d6b03171f9fc8127b3a7adfd4e74ee5d4dae5d14.tar.xz | |
dmaengine: dw-edma: Add support for chip-specific flags
Add a "flags" field to the "struct dw_edma_chip" so that the controller
drivers can pass flags that are relevant to the platform.
DW_EDMA_CHIP_LOCAL - Used by the controller drivers accessing eDMA
locally. Local eDMA access doesn't require generating MSIs to the remote.
Link: https://lore.kernel.org/r/20220524152159.2370739-8-Frank.Li@nxp.com
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-By: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/dw-edma/dw-edma-v0-core.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c index 403ade40c1b1..607647dacc29 100644 --- a/drivers/dma/dw-edma/dw-edma-v0-core.c +++ b/drivers/dma/dw-edma/dw-edma-v0-core.c @@ -301,6 +301,7 @@ u32 dw_edma_v0_core_status_abort_int(struct dw_edma *dw, enum dw_edma_dir dir) static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk) { struct dw_edma_burst *child; + struct dw_edma_chan *chan = chunk->chan; struct dw_edma_v0_lli __iomem *lli; struct dw_edma_v0_llp __iomem *llp; u32 control = 0, i = 0; @@ -314,9 +315,11 @@ static void dw_edma_v0_core_write_chunk(struct dw_edma_chunk *chunk) j = chunk->bursts_alloc; list_for_each_entry(child, &chunk->burst->list, list) { j--; - if (!j) - control |= (DW_EDMA_V0_LIE | DW_EDMA_V0_RIE); - + if (!j) { + control |= DW_EDMA_V0_LIE; + if (!(chan->dw->chip->flags & DW_EDMA_CHIP_LOCAL)) + control |= DW_EDMA_V0_RIE; + } /* Channel control */ SET_LL_32(&lli[i].control, control); /* Transfer size */ |