diff options
| author | Venkatesh Yadav Abbarapu <[email protected]> | 2025-04-30 10:39:23 +0530 |
|---|---|---|
| committer | Michal Simek <[email protected]> | 2026-03-23 14:58:46 +0100 |
| commit | 79a647c6b7d2a52108bbc2cf8dce2eeb6198f025 (patch) | |
| tree | e045bc0ea91dbb87e2472e95ab0990a51fdffe8c | |
| parent | c82aedd185933493a2926c519e2dc8d5f3998440 (diff) | |
spi: cadence_qspi: Disable the DAC mode in indirect read
Hang has been observed on QEMU, as it starts with indac
read and fills sram, but after dma is triggered, it tries
dac read instead (based on priority) which gets blocked.
Disable the DAC mode in indirect DMA read and enable back
for writes as DAC mode is used.
Signed-off-by: Venkatesh Yadav Abbarapu <[email protected]>
Tested-by: Padmarao Begari <[email protected]>
Signed-off-by: Michal Simek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
| -rw-r--r-- | drivers/spi/cadence_ospi_versal.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/spi/cadence_ospi_versal.c b/drivers/spi/cadence_ospi_versal.c index a00642d09d3..e6f4ba49e77 100644 --- a/drivers/spi/cadence_ospi_versal.c +++ b/drivers/spi/cadence_ospi_versal.c @@ -35,6 +35,10 @@ int cadence_qspi_apb_dma_read(struct cadence_spi_priv *priv, bytes_to_dma = n_rx - rx_rem; if (bytes_to_dma) { + if (priv->use_dac_mode) + clrbits_le32(priv->regbase + CQSPI_REG_CONFIG, + CQSPI_REG_CONFIG_DIRECT); + cadence_qspi_apb_enable_linear_mode(false); reg = readl(priv->regbase + CQSPI_REG_CONFIG); reg |= CQSPI_REG_CONFIG_ENBL_DMA; @@ -125,6 +129,9 @@ int cadence_qspi_apb_dma_read(struct cadence_spi_priv *priv, memcpy(rxbuf, rxbuf + 1, n_rx - 1); } + if (priv->use_dac_mode) + cadence_qspi_apb_dac_mode_enable(priv->regbase); + return 0; } |