The existing code checks for the correct state transition after sending
a command. However, it is possible for the message box to return -1,
which indicates an error, if an error has occurred in the firmware.
We can detect if the error has occurred, and return a different error.
In addition, there is no recovering from a CSPL error, so the retry
mechanism is not needed in this case, and we can return immediately.
Signed-off-by: Stefan Binding <sbinding@xxxxxxxxxxxxxxxxxxxxx>
---
include/sound/cs35l41.h | 2 ++
sound/soc/codecs/cs35l41-lib.c | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/include/sound/cs35l41.h b/include/sound/cs35l41.h
index 80df80fe31e2..043f8ac65dbf 100644
--- a/include/sound/cs35l41.h
+++ b/include/sound/cs35l41.h
@@ -816,6 +816,8 @@ struct cs35l41_otp_map_element_t {
};
enum cs35l41_cspl_mbox_status {
+ CSPL_MBOX_STS_ERROR = U32_MAX,
+ CSPL_MBOX_STS_ERROR2 = 0x00ffffff, // firmware not always sign-extending 24-bit value
CSPL_MBOX_STS_RUNNING = 0,
CSPL_MBOX_STS_PAUSED = 1,
CSPL_MBOX_STS_RDY_FOR_REINIT = 2,
diff --git a/sound/soc/codecs/cs35l41-lib.c b/sound/soc/codecs/cs35l41-lib.c
index ddedb7e63cb6..4569e4f7cf7e 100644
--- a/sound/soc/codecs/cs35l41-lib.c
+++ b/sound/soc/codecs/cs35l41-lib.c
@@ -1474,6 +1474,11 @@ int cs35l41_set_cspl_mbox_cmd(struct device *dev, struct regmap *regmap,
continue;
}
+ if (sts == CSPL_MBOX_STS_ERROR || sts == CSPL_MBOX_STS_ERROR2) {
+ dev_err(dev, "CSPL Error Detected\n");
+ return -EINVAL;
+ }
+
if (!cs35l41_check_cspl_mbox_sts(cmd, sts))
dev_dbg(dev, "[%u] cmd %u returned invalid sts %u", i, cmd, sts);
else
--
2.34.1
