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[3/3] soundwire: intel: set dev_num_ida_min

Message ID 20220823045004.2670658-4-yung-chuan.liao@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series soundwire: allocate device_number with IDA | expand

Commit Message

Bard Liao Aug. 23, 2022, 4:50 a.m. UTC 
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

The allowed values for SoundWire device numbers are between 1 and 11
(inclusive). HDaudio/iDISP codecs typically use SDI values 0..3
(inclusive). To allow for a unique peripheral SDI/dev_number across
HDaudio and SoundWire buses, we set the minimum base to 4. This still
allows for 8 SoundWire peripherals in the system, currently more than
needed in actual products.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/intel.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 89d1d0d021fc..3e372599a8c3 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -22,6 +22,9 @@ 
 #include "bus.h"
 #include "intel.h"
 
+/* IDA min selected to avoid conflicts with HDaudio/iDISP SDI values */
+#define INTEL_DEV_NUM_IDA_MIN           4
+
 #define INTEL_MASTER_SUSPEND_DELAY_MS	3000
 #define INTEL_MASTER_RESET_ITERATIONS	10
 
@@ -1307,6 +1310,7 @@  static int intel_link_probe(struct auxiliary_device *auxdev,
 	cdns->msg_count = 0;
 
 	bus->link_id = auxdev->id;
+	bus->dev_num_ida_min = INTEL_DEV_NUM_IDA_MIN;
 
 	sdw_cdns_probe(cdns);