kernel/linux.git/drivers/soundwire/generic_bandwidth_allocation.c, branch v6.19.11

soundwire: only compute BPT stream in sdw_compute_dp0_port_params

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

DP0 is only for BPT stream. We should not compute and update the port params of the normal audio streams. Signed-off-by: Bard Liao Reviewed-by: Ranjani Sridharan Link: https://patch.msgid.link/20251014031450.3781789-3-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: only compute port params in specific stream states

2025-05-14T11:44:01+00:00

Currently, sdw_compute_master_ports() is blindly called for every single Manager runtime. However, we should not take into account the stream's bandwidth if the stream is just allocated or already deprepared. Fixes: 25befdf32aa4 ("soundwire: generic_bandwidth_allocation: count the bandwidth of active streams only") Link: https://github.com/thesofproject/linux/issues/5398 Signed-off-by: Bard Liao Reviewed-by: Ranjani Sridharan Reviewed-by: Péter Ujfalusi Link: https://lore.kernel.org/r/20250508062029.6596-1-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: take in count the bandwidth of a prepared stream

2025-03-10T20:21:58+00:00

When a stream's state is marked as prepared, it is ready for playback/capture. Therefore, we need to include the stream's bandwidth when we calculate the required bandwidth of a bus. Fixes: 25befdf32aa40 ("soundwire: generic_bandwidth_allocation: count the bandwidth of active streams only") Signed-off-by: Bard Liao Link: https://github.com/thesofproject/linux/issues/5334 Reviewed-by: Richard Fitzgerald Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20250310073653.56476-1-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: stream: special-case the bus compute_params() routine

2025-03-10T07:01:18+00:00

For BPT support, we want to allocate the entire audio payload and bypass the allocation based on PCM/PDM parameters. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao Reviewed-by: Péter Ujfalusi Reviewed-by: Liam Girdwood Reviewed-by: Ranjani Sridharan Tested-by: shumingf@realtek.com Link: https://lore.kernel.org/r/20250227140615.8147-6-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: generic_bandwidth_allocation: count the bandwidth of active streams only

2024-12-23T06:30:34+00:00

sdw_compute_group_params() should only count payload bandwidth of the active streams which is in the ENABLED and DISABLED state in the bus. And add the payload bandwidth of the stream that calls sdw_compute_group_params() in sdw_prepare_stream(). Signed-off-by: Bard Liao Reviewed-by: Ranjani Sridharan Reviewed-by: Péter Ujfalusi Link: https://lore.kernel.org/r/20241218080155.102405-15-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

SoundWire: pass stream to compute_params()

2024-12-23T06:30:34+00:00

The stream parameter will be used in the follow up commit. No function change. Signed-off-by: Bard Liao Reviewed-by: Ranjani Sridharan Reviewed-by: Péter Ujfalusi Link: https://lore.kernel.org/r/20241218080155.102405-14-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: generic_bandwidth_allocation: add lane in sdw_group_params

2024-12-23T06:30:34+00:00

All active streams with the same parameters are grouped together and the params are stored in the sdw_group struct. We compute the required bandwidth for each group. However, each lane has individual bandwidth. Therefore, we should separate different lanes in different params groups. Add lane variable to separate params groups. Signed-off-by: Bard Liao Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20241218080155.102405-13-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: generic_bandwidth_allocation: select data lane

2024-12-23T06:30:33+00:00

If a peripheral supports multi-lane, we can use data lane x to extend the bandwidth. The patch suggests to select data lane x where x > 0 when bandwidth is not enough on data lane 0. Signed-off-by: Bard Liao Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20241218080155.102405-12-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: generic_bandwidth_allocation: check required freq accurately

2024-12-23T06:30:33+00:00

Currently, we check curr_dr_freq roughly by "if (curr_dr_freq <= bus->params.bandwidth)" in sdw_compute_bus_params() and check it accurately in sdw_select_row_col(). It works if we only support one freq. But, we need to check it accurately in sdw_select_row_col() to give it a chance to use a higher freq or use multi-lane. Signed-off-by: Bard Liao Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20241218080155.102405-11-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: generic_bandwidth_allocation: correct clk_freq check in sdw_select_row_col

2024-12-23T06:30:33+00:00

The bits in Column 0 of Rows 0 to 47 are for control word and cannot be used for audio. In practice, entire Column 0 is skipped. Signed-off-by: Bard Liao Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20241218080155.102405-10-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul