linux-kernel - [PATCH v1] i3c: mipi-i3c-hci: Support SETDASA CCC

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Message-ID: <20241113035826.923918-1-billy_tsai@aspeedtech.com>
Date: Wed, 13 Nov 2024 11:58:26 +0800
From: Billy Tsai <billy_tsai@...eedtech.com>
To: <alexandre.belloni@...tlin.com>, <jarkko.nikula@...ux.intel.com>,
	<Shyam-sundar.S-k@....com>, <Guruvendra.Punugupati@....com>,
	<krishnamoorthi.m@....com>, <billy_tsai@...eedtech.com>,
	<linux-i3c@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1] i3c: mipi-i3c-hci: Support SETDASA CCC

When the I3C subsystem wants to assign a dynamic address using the SETDASA
CCC, it needs to attach the I3C device with device info that includes only
the static address. In the HCI, if the driver want to send this SETDASA
CCC, a DAT entry is required to temporarily fill the device's static
address into the dynamic address field. Afterward, the reattach API will
be executed to update the DAT with the correct dynamic addrees value.

Signed-off-by: Billy Tsai <billy_tsai@...eedtech.com>
---
 drivers/i3c/master/mipi-i3c-hci/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/i3c/master/mipi-i3c-hci/core.c b/drivers/i3c/master/mipi-i3c-hci/core.c
index a82c47c9986d..6655e8396a35 100644
--- a/drivers/i3c/master/mipi-i3c-hci/core.c
+++ b/drivers/i3c/master/mipi-i3c-hci/core.c
@@ -438,7 +438,8 @@ static int i3c_hci_attach_i3c_dev(struct i3c_dev_desc *dev)
 			kfree(dev_data);
 			return ret;
 		}
-		mipi_i3c_hci_dat_v1.set_dynamic_addr(hci, ret, dev->info.dyn_addr);
+		mipi_i3c_hci_dat_v1.set_dynamic_addr(hci, ret,
+						     dev->info.dyn_addr ?: dev->info.static_addr);
 		dev_data->dat_idx = ret;
 	}
 	i3c_dev_set_master_data(dev, dev_data);
-- 
2.25.1