From: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> Qualcomm Soundwire Controllers IP version after 1.3 have a dedicated master id register which will provide a unique id value for each controller instance. Use this value instead of artificially generated value from idr. Versions 1.3 and below only have one instance of soundwire controller which does no have this register, so let them use value from idr. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx> --- This patch depends on "[RFC PATCH 0/2] soundwire: introduce controller ID" https://lore.kernel.org/lkml/4815c8d6-635d-415c-9e02-4e39e92a3d6d@xxxxxxxxxxxxx/T/ patchset. drivers/soundwire/qcom.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index 8e027eee8b73..48291fbaf674 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -1624,9 +1624,13 @@ static int qcom_swrm_probe(struct platform_device *pdev) } } - /* FIXME: is there a DT-defined value to use ? */ ctrl->bus.controller_id = -1; + if (ctrl->version > SWRM_VERSION_1_3_0) { + ctrl->reg_read(ctrl, SWRM_COMP_MASTER_ID, &val); + ctrl->bus.controller_id = val; + } + ret = sdw_bus_master_add(&ctrl->bus, dev, dev->fwnode); if (ret) { dev_err(dev, "Failed to register Soundwire controller (%d)\n", -- 2.42.0
