This patch add max_burst to dma_get_slave_caps for clients to get the burst capability of slave dma controller.
Signed-off-by: Shawn Lin shawn.lin@rock-chips.com
---
Changes in v6: - remove expose quirk and add dma max_burst caps for clients
Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None Changes in v1: None
drivers/dma/dmaengine.c | 1 + include/linux/dmaengine.h | 4 ++++ 2 files changed, 5 insertions(+)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 3ecec14..1ccf64b 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -492,6 +492,7 @@ int dma_get_slave_caps(struct dma_chan *chan, struct dma_slave_caps *caps) caps->src_addr_widths = device->src_addr_widths; caps->dst_addr_widths = device->dst_addr_widths; caps->directions = device->directions; + caps->max_burst = device->max_burst; caps->residue_granularity = device->residue_granularity;
/* diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 7ea9184..b6bc79e 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -401,6 +401,7 @@ enum dma_residue_granularity { * since the enum dma_transfer_direction is not defined as bits for each * type of direction, the dma controller should fill (1 << <TYPE>) and same * should be checked by controller as well + * @max_burst: max burst capability per-transfer * @cmd_pause: true, if pause and thereby resume is supported * @cmd_terminate: true, if terminate cmd is supported * @residue_granularity: granularity of the reported transfer residue @@ -411,6 +412,7 @@ struct dma_slave_caps { u32 src_addr_widths; u32 dst_addr_widths; u32 directions; + u32 max_burst; bool cmd_pause; bool cmd_terminate; enum dma_residue_granularity residue_granularity; @@ -627,6 +629,7 @@ enum dmaengine_alignment { * the enum dma_transfer_direction is not defined as bits for * each type of direction, the dma controller should fill (1 << * <TYPE>) and same should be checked by controller as well + * @max_burst: max burst capability per-transfer * @residue_granularity: granularity of the transfer residue reported * by tx_status * @device_alloc_chan_resources: allocate resources and return the @@ -680,6 +683,7 @@ struct dma_device { u32 src_addr_widths; u32 dst_addr_widths; u32 directions; + u32 max_burst; enum dma_residue_granularity residue_granularity;
int (*device_alloc_chan_resources)(struct dma_chan *chan);