diff options
| author | Jarkko Nikula <jarkko.nikula@linux.intel.com> | 2024-06-28 16:15:59 +0300 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2024-07-26 14:21:29 +0200 |
| commit | 4642f7eddb75efb5944ff21e5340ccce66928ff1 (patch) | |
| tree | 0b5ea266c9bf92ddce591c19efa74edcf90e23cd /drivers/i3c | |
| parent | 8a2be2f1db268ec735419e53ef04ca039fc027dc (diff) | |
i3c: mipi-i3c-hci: Round IBI data chunk size to HW supported value
The dma.c: hci_dma_init() sets the CHUNK_SIZE field in the IBI_SETUP
register incorrectly if the calculated ibi_chunk_sz is not exactly
2^(n+2) bytes, where n is 0..6.
Fix this by rounding the chunk size up to nearest 2^(n+2) bytes.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Link: https://lore.kernel.org/r/20240628131559.502822-4-jarkko.nikula@linux.intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'drivers/i3c')
| -rw-r--r-- | drivers/i3c/master/mipi-i3c-hci/dma.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i3c/master/mipi-i3c-hci/dma.c b/drivers/i3c/master/mipi-i3c-hci/dma.c index 9bdfe40bc1e1..a918e96b21fd 100644 --- a/drivers/i3c/master/mipi-i3c-hci/dma.c +++ b/drivers/i3c/master/mipi-i3c-hci/dma.c @@ -279,6 +279,13 @@ static int hci_dma_init(struct i3c_hci *hci) rh->ibi_chunk_sz = dma_get_cache_alignment(); rh->ibi_chunk_sz *= IBI_CHUNK_CACHELINES; + /* + * Round IBI data chunk size to number of bytes supported by + * the HW. Chunk size can be 2^n number of DWORDs which is the + * same as 2^(n+2) bytes, where n is 0..6. + */ + rh->ibi_chunk_sz = umax(4, rh->ibi_chunk_sz); + rh->ibi_chunk_sz = roundup_pow_of_two(rh->ibi_chunk_sz); if (rh->ibi_chunk_sz > 256) { ret = -EINVAL; goto err_out; |