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spi: use non combined seq for split xfers

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Add check to switch to non combined sequence for
transfers if transfer length is greater than
DMA buffer size. Combined sequence cannot handle
split transfers so anything above dma_buf_size fails.
In case the transfers are beyond 64KB add a mechanism to
switch to non combined sequence of transfers.

Bug 3754288

Change-Id: I4d4eda56dcefdd9e35c19cdaf770783b99650c2c
Signed-off-by: Vishwaroop A <va@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2886311
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Vishwaroop A
2023-04-11 21:00:18 +00:00
committed by mobile promotions
parent 6129bcc538
commit 9d101a46bb
1 changed files with 3 additions and 0 deletions
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3
drivers/spi/spi-tegra210-quad.c
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@@ -1355,6 +1355,9 @@ static bool tegra_qspi_validate_cmb_seq(struct tegra_qspi *tqspi,
if (!tqspi->soc_data->dma_mode && xfer->len > (QSPI_FIFO_DEPTH << 2)) if (!tqspi->soc_data->dma_mode && xfer->len > (QSPI_FIFO_DEPTH << 2))
return false; return false;
if (xfer->len > tqspi->dma_buf_size)
return false;
return true; return true;
} }