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soundwire: update Intel BPT message length limitation

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The limitation of "must be multiples of 32 bytes" does not fit the
requirement of current Intel platforms. Update it to meet the
requirement.

Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/20250429122337.142551-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Bard Liao 2025-04-29 20:23:37 +08:00 committed by Vinod Koul
parent fdf5596103
commit 393350c169
2 changed files with 5 additions and 5 deletions
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2
Documentation/driver-api/soundwire/bra.rst
View File

@ -333,4 +333,4 @@ FIFO sizes to avoid xruns.
Alignment requirements are currently not enforced at the core level Alignment requirements are currently not enforced at the core level
but at the platform-level, e.g. for Intel the data sizes must be but at the platform-level, e.g. for Intel the data sizes must be
multiples of 32 bytes. equal to or larger than 16 bytes.

8
drivers/soundwire/intel_ace2x.c
View File

@ -246,7 +246,7 @@ static void intel_ace2x_bpt_close_stream(struct sdw_intel *sdw, struct sdw_slave
cdns->bus.bpt_stream = NULL; cdns->bus.bpt_stream = NULL;
} }
#define INTEL_BPT_MSG_BYTE_ALIGNMENT 32 #define INTEL_BPT_MSG_BYTE_MIN 16
static int intel_ace2x_bpt_send_async(struct sdw_intel *sdw, struct sdw_slave *slave, static int intel_ace2x_bpt_send_async(struct sdw_intel *sdw, struct sdw_slave *slave,
struct sdw_bpt_msg *msg) struct sdw_bpt_msg *msg)
@ -254,9 +254,9 @@ static int intel_ace2x_bpt_send_async(struct sdw_intel *sdw, struct sdw_slave *s
struct sdw_cdns *cdns = &sdw->cdns; struct sdw_cdns *cdns = &sdw->cdns;
int ret; int ret;
if (msg->len % INTEL_BPT_MSG_BYTE_ALIGNMENT) { if (msg->len < INTEL_BPT_MSG_BYTE_MIN) {
dev_err(cdns->dev, "BPT message length %d is not a multiple of %d bytes\n", dev_err(cdns->dev, "BPT message length %d is less than the minimum bytes %d\n",
msg->len, INTEL_BPT_MSG_BYTE_ALIGNMENT); msg->len, INTEL_BPT_MSG_BYTE_MIN);
return -EINVAL; return -EINVAL;
} }