dmaengine: qcom: gpi: Set link_rx bit on GO TRE for rx operation

[ Upstream commit 25e8ac233d24051e2c4ff64c34f60609b0988568 ]

Rx operation on SPI GSI DMA is currently not working.
As per GSI spec, link_rx bit is to be set on GO TRE on tx
channel whenever there is going to be a DMA TRE on rx
channel. This is currently set for duplex operation only.

Set the bit for rx operation as well.
This is part of changes required to bring up Rx.

Fixes: 94b8f0e58fa1 ("dmaengine: qcom: gpi: set chain and link flag for duplex")
Signed-off-by: Vijaya Krishna Nivarthi <quic_vnivarth@quicinc.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/1671212293-14767-1-git-send-email-quic_vnivarth@quicinc.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c
index 3f56514bbef8f9d3178b2a67fdaf2fb6e0bb530d..98d45ee4b4e34af5beed25e9da5ba08a65f7fca7 100644 (file)
--- a/drivers/dma/qcom/gpi.c
+++ b/drivers/dma/qcom/gpi.c
@@ -1756,6 +1756,7 @@ static int gpi_create_spi_tre(struct gchan *chan, struct gpi_desc *desc,
                tre->dword[3] = u32_encode_bits(TRE_TYPE_GO, TRE_FLAGS_TYPE);
                if (spi->cmd == SPI_RX) {
                        tre->dword[3] |= u32_encode_bits(1, TRE_FLAGS_IEOB);
+                       tre->dword[3] |= u32_encode_bits(1, TRE_FLAGS_LINK);
                } else if (spi->cmd == SPI_TX) {
                        tre->dword[3] |= u32_encode_bits(1, TRE_FLAGS_CHAIN);
                } else { /* SPI_DUPLEX */