From 94b8f0e58fa138455edc5414aa097694fede8836 Mon Sep 17 00:00:00 2001 From: Vinod Koul Date: Wed, 6 Apr 2022 18:55:06 +0530 Subject: [PATCH] dmaengine: qcom: gpi: set chain and link flag for duplex Newer platforms seem to have strict requirement for TRE flags which causes transaction to timeout. This was resolved to missing chain and link flag for duplex spi transaction. So add these two flags. Signed-off-by: Vinod Koul Reviewed-by: Bjorn Andersson Tested-by: Bjorn Andersson Link: https://lore.kernel.org/r/20220406132508.1029348-1-vkoul@kernel.org Signed-off-by: Vinod Koul --- drivers/dma/qcom/gpi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c index 94f3648f7483..3429ceccd13b 100644 --- a/drivers/dma/qcom/gpi.c +++ b/drivers/dma/qcom/gpi.c @@ -1754,10 +1754,14 @@ static int gpi_create_spi_tre(struct gchan *chan, struct gpi_desc *desc, tre->dword[2] = u32_encode_bits(spi->rx_len, TRE_RX_LEN); tre->dword[3] = u32_encode_bits(TRE_TYPE_GO, TRE_FLAGS_TYPE); - if (spi->cmd == SPI_RX) + if (spi->cmd == SPI_RX) { tre->dword[3] |= u32_encode_bits(1, TRE_FLAGS_IEOB); - else + } else if (spi->cmd == SPI_TX) { + tre->dword[3] |= u32_encode_bits(1, TRE_FLAGS_CHAIN); + } else { /* SPI_DUPLEX */ tre->dword[3] |= u32_encode_bits(1, TRE_FLAGS_CHAIN); + tre->dword[3] |= u32_encode_bits(1, TRE_FLAGS_LINK); + } } /* create the dma tre */ -- 2.25.1