diff options
Diffstat (limited to 'drivers/dma/dw/core.c')
| -rw-r--r-- | drivers/dma/dw/core.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index afe5a2e465af..588b9bae827c 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -791,6 +791,11 @@ static int dwc_config(struct dma_chan *chan, struct dma_slave_config *sconfig) memcpy(&dwc->dma_sconfig, sconfig, sizeof(*sconfig)); + dwc->dma_sconfig.src_maxburst = + clamp(dwc->dma_sconfig.src_maxburst, 0U, dwc->max_burst); + dwc->dma_sconfig.dst_maxburst = + clamp(dwc->dma_sconfig.dst_maxburst, 0U, dwc->max_burst); + dw->encode_maxburst(dwc, &dwc->dma_sconfig.src_maxburst); dw->encode_maxburst(dwc, &dwc->dma_sconfig.dst_maxburst); @@ -1049,6 +1054,13 @@ static void dwc_free_chan_resources(struct dma_chan *chan) dev_vdbg(chan2dev(chan), "%s: done\n", __func__); } +static void dwc_caps(struct dma_chan *chan, struct dma_slave_caps *caps) +{ + struct dw_dma_chan *dwc = to_dw_dma_chan(chan); + + caps->max_burst = dwc->max_burst; +} + int do_dma_probe(struct dw_dma_chip *chip) { struct dw_dma *dw = chip->dw; @@ -1189,9 +1201,12 @@ int do_dma_probe(struct dw_dma_chip *chip) dwc->nollp = (dwc_params >> DWC_PARAMS_MBLK_EN & 0x1) == 0 || (dwc_params >> DWC_PARAMS_HC_LLP & 0x1) == 1; + dwc->max_burst = + (0x4 << (dwc_params >> DWC_PARAMS_MSIZE & 0x7)); } else { dwc->block_size = pdata->block_size; dwc->nollp = !pdata->multi_block[i]; + dwc->max_burst = pdata->max_burst[i] ?: DW_DMA_MAX_BURST; } } @@ -1214,6 +1229,7 @@ int do_dma_probe(struct dw_dma_chip *chip) dw->dma.device_prep_dma_memcpy = dwc_prep_dma_memcpy; dw->dma.device_prep_slave_sg = dwc_prep_slave_sg; + dw->dma.device_caps = dwc_caps; dw->dma.device_config = dwc_config; dw->dma.device_pause = dwc_pause; dw->dma.device_resume = dwc_resume; |