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spi: spi-geni-qcom: enable SPI_CONTROLLER_MUST_TX for GPI DMA mode 

The GPI DMA mode requires for TX DMA to be prepared. Force SPI core to
provide TX buffer even if the caller didn't provide one by setting the
SPI_CONTROLLER_MUST_TX flag.

Fixes: b59c122484 ("spi: spi-geni-qcom: Add support for GPI dma")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230629095847.3648597-1-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2023-06-29 12:58:47 +03:00 committed by Mark Brown
parent e884a13334
commit d10005837b
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GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 0 deletions
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6
drivers/spi/spi-geni-qcom.c
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@ -1100,6 +1100,12 @@ static int spi_geni_probe(struct platform_device *pdev)
if (mas->cur_xfer_mode == GENI_SE_FIFO)
spi->set_cs = spi_geni_set_cs;
/*
* TX is required per GSI spec, see setup_gsi_xfer().
*/
if (mas->cur_xfer_mode == GENI_GPI_DMA)
spi->flags = SPI_CONTROLLER_MUST_TX;
ret = request_irq(mas->irq, geni_spi_isr, 0, dev_name(dev), spi);
if (ret)
goto spi_geni_release_dma;