linux-toradex.git/drivers/soundwire, branch v6.19

Merge tag 'soundwire-6.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire

2026-01-18T20:29:12+00:00

Pull soundwire fix from Vinod Koul:

 - Single off-by-one fix for allocating slave id

* tag 'soundwire-6.19-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire:
  soundwire: bus: fix off-by-one when allocating slave IDs

soundwire: Add missing EXPORT for sdw_slave_type

2026-01-14T13:35:17+00:00

include/sdw_type.h provides the function is_sdw_slave() which
requires sdw_slave_type. But sdw_slave_type was not exported.

Signed-off-by: Richard Fitzgerald 
Acked-by: Vinod Koul 
Reviewed-by: Pierre-Louis Bossart 
Reviewed-by: Charles Keepax 
Link: https://patch.msgid.link/20260112140758.215799-2-rf@opensource.cirrus.com
Signed-off-by: Mark Brown

soundwire: bus: fix off-by-one when allocating slave IDs

2026-01-13T11:26:03+00:00

ida_alloc_max() interprets its max argument as inclusive.

Using SDW_FW_MAX_DEVICES(16) therefore allows an ID of 16 to be
allocated, but the IRQ domain created for the bus is sized for IDs
0-15.  If 16 is returned, irq_create_mapping() fails and the driver
ends up with an invalid IRQ mapping.

Limit the allocation to 0-15 by passing SDW_FW_MAX_DEVICES - 1.

Reported-by: kernel test robot 
Reported-by: Dan Carpenter 
Closes: https://lore.kernel.org/r/202512240450.hlDH3nCs-lkp@intel.com/
Fixes: aab12022b076 ("soundwire: bus: Add internal slave ID and use for IRQs")
Signed-off-by: Harshit Mogalapalli 
Reviewed-by: Charles Keepax 
Link: https://patch.msgid.link/20260110201959.2523024-1-harshit.m.mogalapalli@oracle.com
Signed-off-by: Vinod Koul

soundwire: intel_ace2x: handle multi BPT sections

2025-12-08T07:07:27+00:00

Calculate required PDI buffer and pass the section number to the cdns
BPT helpers.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Tested-by: Shuming Fan 
Link: https://patch.msgid.link/20251021094355.132943-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: pass sdw_bpt_section to cdns BPT helpers

2025-12-08T07:07:27+00:00

We can get start_register, data_size, and buffer data from the new
sdw_bpt_section parameter. Also, handle all register sections in the
cdns BRA helpers. No function changes as section number is 1.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Tested-by: Shuming Fan 
Link: https://patch.msgid.link/20251021094355.132943-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: introduce BPT section

2025-12-08T07:07:27+00:00

Currently we send a BRA message with a start address with continuous
registers in a BPT stream. However, a codec may need to write different
register sections shortly. Introduce a register section in struct
sdw_btp_msg which contain register start address, length, and buffer.
This commit uses only 1 section for each BPT message. And we need to add
up all BPT section length and check if it reach maximum BPT bytes.
No function changes.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Tested-by: Shuming Fan 
Link: https://patch.msgid.link/20251021094355.132943-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: intel_ace2x: add fake frame to BRA read command

2025-12-08T07:07:26+00:00

Intel DMA buffer size need to be a multiple of data block size.
Find the minimal fake data size and extra buffer size to meet the
requirement.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Link: https://patch.msgid.link/20251030070253.1216871-8-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: cadence_master: add fake_size parameter to sdw_cdns_prepare_read_dma_buffer

2025-12-08T07:07:26+00:00

We may need to add few fake frames to fit the aligned read dma buffer
size. Add a fake_size parameter to allow the caller to set the fake data
size.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Link: https://patch.msgid.link/20251014031450.3781789-7-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: cadence: export sdw_cdns_bpt_find_bandwidth

2025-12-08T07:07:26+00:00

Currently, we calculate the required bandwidth after the PDI buffer size
is calculated. However as we need to add some fake frame to align the
data block size, the final PDI size and the frame number will change.
Besides, we need the required bandwidth to decide the DMA channel number
and the channel number will be used to calculate the data block size.
Therefore, we calculate the required bandwidth and export a helper for
the caller to get the required bandwidth.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Link: https://patch.msgid.link/20251014031450.3781789-5-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: cadence_master: set data_per_frame as frame capability

2025-12-08T07:07:26+00:00

data_per_frame will be used for preparing the TX buffer and we may add
some fake frames to ensure the data in the buffer will be flushed.
So that it should indicate the frame capability even if the required
data bytes are less than the frame capability.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Link: https://patch.msgid.link/20251014031450.3781789-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul