[PATCH] i3c: don't fail if GETHDRCAP is unsupported

Wolfram Sang
2025-06-25T08:26:59Z

If a target has the HDR_CAP bit set in BCR, the core wants to get
additional information using the CCC 'GETHDRCAP'. Not all controllers
support this CCC, though. This is not fatal. We can just skip it. The
information is not needed if the controller won't support HDR anyhow.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

Found during the I3C plugfest in Warsaw.

drivers/i3c/master.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index 204b96e6be1e..b6b96cf9e4e0 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -1440,7 +1440,7 @@ static int i3c_master_retrieve_dev_info(struct i3c_dev_desc *dev)

if (dev->info.bcr & I3C_BCR_HDR_CAP) {
ret = i3c_master_gethdrcap_locked(master, &dev->info);
- if (ret)
+ if (ret && ret != -ENOTSUPP)
return ret;
}

--
2.47.2