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dmaengine: qcom: gpi: set chain and link flag for duplex

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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 <vkoul@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220406132508.1029348-1-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Vinod Koul
2022-04-06 18:55:06 +05:30
parent 52126d4c03
commit 94b8f0e58f
1 changed files with 6 additions and 2 deletions
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8
drivers/dma/qcom/gpi.c
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@@ -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[2] = u32_encode_bits(spi->rx_len, TRE_RX_LEN);
tre->dword[3] = u32_encode_bits(TRE_TYPE_GO, TRE_FLAGS_TYPE); 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); 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); 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 */ /* create the dma tre */