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

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 <pierre-louis.bossart@linux.dev>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Liam Girdwood <liam.r.girdwood@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
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 <vkoul@kernel.org>

diff --git a/drivers/soundwire/generic_bandwidth_allocation.c b/drivers/soundwire/generic_bandwidth_allocation.c
index 59965f43c2fb0e3335855902ad8b8649f7208e53..b646c2ffe84a3afbdf6b8f3642c19cc3aae4651b 100644 (file)
--- a/drivers/soundwire/generic_bandwidth_allocation.c
+++ b/drivers/soundwire/generic_bandwidth_allocation.c
@@ -86,6 +86,49 @@ void sdw_compute_slave_ports(struct sdw_master_runtime *m_rt,
 }
 EXPORT_SYMBOL(sdw_compute_slave_ports);
 
+static void sdw_compute_dp0_slave_ports(struct sdw_master_runtime *m_rt)
+{
+       struct sdw_bus *bus = m_rt->bus;
+       struct sdw_slave_runtime *s_rt;
+       struct sdw_port_runtime *p_rt;
+
+       list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
+               list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
+                       sdw_fill_xport_params(&p_rt->transport_params, p_rt->num, false,
+                                             SDW_BLK_GRP_CNT_1, bus->params.col, 0, 0, 1,
+                                             bus->params.col - 1, SDW_BLK_PKG_PER_PORT, 0x0);
+
+                       sdw_fill_port_params(&p_rt->port_params, p_rt->num, bus->params.col - 1,
+                                            SDW_PORT_FLOW_MODE_ISOCH, SDW_PORT_DATA_MODE_NORMAL);
+               }
+       }
+}
+
+static void sdw_compute_dp0_master_ports(struct sdw_master_runtime *m_rt)
+{
+       struct sdw_port_runtime *p_rt;
+       struct sdw_bus *bus = m_rt->bus;
+
+       list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
+               sdw_fill_xport_params(&p_rt->transport_params, p_rt->num, false,
+                                     SDW_BLK_GRP_CNT_1, bus->params.col, 0, 0, 1,
+                                     bus->params.col - 1, SDW_BLK_PKG_PER_PORT, 0x0);
+
+               sdw_fill_port_params(&p_rt->port_params, p_rt->num, bus->params.col - 1,
+                                    SDW_PORT_FLOW_MODE_ISOCH, SDW_PORT_DATA_MODE_NORMAL);
+       }
+}
+
+static void sdw_compute_dp0_port_params(struct sdw_bus *bus)
+{
+       struct sdw_master_runtime *m_rt;
+
+       list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
+               sdw_compute_dp0_master_ports(m_rt);
+               sdw_compute_dp0_slave_ports(m_rt);
+       }
+}
+
 static void sdw_compute_master_ports(struct sdw_master_runtime *m_rt,
                                     struct sdw_group_params *params,
                                     int *port_bo, int hstop)
@@ -618,6 +661,11 @@ int sdw_compute_params(struct sdw_bus *bus, struct sdw_stream_runtime *stream)
        if (ret < 0)
                return ret;
 
+       if (stream->type == SDW_STREAM_BPT) {
+               sdw_compute_dp0_port_params(bus);
+               return 0;
+       }
+
        /* Compute transport and port params */
        ret = sdw_compute_port_params(bus, stream);
        if (ret < 0) {