DW_EDMA_CHIP_32BIT_DBI was used by the controller drivers like i.MX8 that allows only 32bit access to the DBI region. Signed-off-by: Frank Li <Frank.Li@xxxxxxx> Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx> --- Change from v6 to v9 - none Change from v5 to v6 - use enum instead of define New patch at v5 - fix kernel test robot build error drivers/dma/dw-edma/dw-edma-v0-core.c | 13 ++++++++----- include/linux/dma/edma.h | 2 ++ 2 files changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c index 2ab1059a3de1e..2d3f74ccc340a 100644 --- a/drivers/dma/dw-edma/dw-edma-v0-core.c +++ b/drivers/dma/dw-edma/dw-edma-v0-core.c @@ -417,15 +417,18 @@ void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first) SET_CH_32(dw, chan->dir, chan->id, ch_control1, (DW_EDMA_V0_CCS | DW_EDMA_V0_LLE)); /* Linked list */ - #ifdef CONFIG_64BIT - SET_CH_64(dw, chan->dir, chan->id, llp.reg, - chunk->ll_region.paddr); - #else /* CONFIG_64BIT */ + if ((chan->dw->chip->flags & DW_EDMA_CHIP_32BIT_DBI) || + !IS_ENABLED(CONFIG_64BIT)) { SET_CH_32(dw, chan->dir, chan->id, llp.lsb, lower_32_bits(chunk->ll_region.paddr)); SET_CH_32(dw, chan->dir, chan->id, llp.msb, upper_32_bits(chunk->ll_region.paddr)); - #endif /* CONFIG_64BIT */ + } else { + #ifdef CONFIG_64BIT + SET_CH_64(dw, chan->dir, chan->id, llp.reg, + chunk->ll_region.paddr); + #endif + } } /* Doorbell */ SET_RW_32(dw, chan->dir, doorbell, diff --git a/include/linux/dma/edma.h b/include/linux/dma/edma.h index fbd05a7284934..8b134896c9edb 100644 --- a/include/linux/dma/edma.h +++ b/include/linux/dma/edma.h @@ -36,9 +36,11 @@ enum dw_edma_map_format { /** * enum dw_edma_chip_flags - Flags specific to an eDMA chip * @DW_EDMA_CHIP_LOCAL: eDMA is used locally by an endpoint + * @DW_EDMA_CHIP_32BIT_DBI Only support 32bit DBI register access */ enum dw_edma_chip_flags { DW_EDMA_CHIP_LOCAL = BIT(0), + DW_EDMA_CHIP_32BIT_DBI = BIT(1), }; /** -- 2.35.1