diff options
| author | Adrian Ng Ho Yin <adrianhoyin.ng@altera.com> | 2026-02-13 09:00:48 +0300 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2026-03-12 00:50:29 +0300 |
| commit | f311a05784634febd299f03476b80f3f18489767 (patch) | |
| tree | ce814769a0751fecc59354a70b584cfd73e8ae36 | |
| parent | f26ecaa0f0abfe5db173416214098a00d3b7db79 (diff) | |
| download | linux-f311a05784634febd299f03476b80f3f18489767.tar.xz | |
i3c: dw-i3c-master: Set SIR_REJECT in DAT on device attach and reattach
The DesignWare I3C master controller ACKs IBIs as soon as a valid
Device Address Table (DAT) entry is present. This can create a race
between device attachment (after DAA) and the point where the client
driver enables IBIs via i3c_device_enable_ibi().
Set DEV_ADDR_TABLE_SIR_REJECT in the DAT entry during
attach_i3c_dev() and reattach_i3c_dev() so that IBIs are rejected
by default. The bit is managed thereafter by the existing
dw_i3c_master_set_sir_enabled() function, which clears it in
enable_ibi() after ENEC is issued, and restores it in disable_ibi()
after DISEC.
Fixes: 1dd728f5d4d4 ("i3c: master: Add driver for Synopsys DesignWare IP")
Signed-off-by: Adrian Ng Ho Yin <adrianhoyin.ng@altera.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/53f5b8cbdd8af789ec38b95b02873f32f9182dd6.1770962368.git.adrianhoyin.ng@altera.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| -rw-r--r-- | drivers/i3c/master/dw-i3c-master.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c index d334c217c7a3..d6bdb32397fb 100644 --- a/drivers/i3c/master/dw-i3c-master.c +++ b/drivers/i3c/master/dw-i3c-master.c @@ -1024,7 +1024,7 @@ static int dw_i3c_master_reattach_i3c_dev(struct i3c_dev_desc *dev, master->free_pos &= ~BIT(pos); } - writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(dev->info.dyn_addr), + writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(dev->info.dyn_addr) | DEV_ADDR_TABLE_SIR_REJECT, master->regs + DEV_ADDR_TABLE_LOC(master->datstartaddr, data->index)); @@ -1053,7 +1053,7 @@ static int dw_i3c_master_attach_i3c_dev(struct i3c_dev_desc *dev) master->free_pos &= ~BIT(pos); i3c_dev_set_master_data(dev, data); - writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(master->devs[pos].addr), + writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(master->devs[pos].addr) | DEV_ADDR_TABLE_SIR_REJECT, master->regs + DEV_ADDR_TABLE_LOC(master->datstartaddr, data->index)); |