From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
In rare corner cases, we see an error with the log:
[ 838.297840] soundwire sdw-master-1: Compute bus params failed: -22
That's not very useful, there can be two different error conditions
with the same -EINVAL code provided to the caller.
Let's add better dev_err() messages to figure out what went wrong.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@xxxxxxxxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
drivers/soundwire/generic_bandwidth_allocation.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/soundwire/generic_bandwidth_allocation.c b/drivers/soundwire/generic_bandwidth_allocation.c
index 84d129587084..f7c66083a4dd 100644
--- a/drivers/soundwire/generic_bandwidth_allocation.c
+++ b/drivers/soundwire/generic_bandwidth_allocation.c
@@ -382,12 +382,18 @@ static int sdw_compute_bus_params(struct sdw_bus *bus)
*/
}
- if (i == clk_values)
+ if (i == clk_values) {
+ dev_err(bus->dev, "%s: could not find clock value for bandwidth %d\n",
+ __func__, bus->params.bandwidth);
return -EINVAL;
+ }
ret = sdw_select_row_col(bus, curr_dr_freq);
- if (ret < 0)
+ if (ret < 0) {
+ dev_err(bus->dev, "%s: could not find frame configuration for bus dr_freq %d\n",
+ __func__, curr_dr_freq);
return -EINVAL;
+ }
bus->params.curr_dr_freq = curr_dr_freq;
return 0;
@@ -404,10 +410,8 @@ int sdw_compute_params(struct sdw_bus *bus)
/* Computes clock frequency, frame shape and frame frequency */
ret = sdw_compute_bus_params(bus);
- if (ret < 0) {
- dev_err(bus->dev, "Compute bus params failed: %d\n", ret);
+ if (ret < 0)
return ret;
- }
/* Compute transport and port params */
ret = sdw_compute_port_params(bus);
--
2.17.1
