github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-23 05:04:02 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode

Browse Source 
In PIO mode initialization, STAT_IBI_STATUS_THLD was missing from
pio->enabled_irqs. As a result, the host controller interrupt signal for
IBI threshold was never enabled when transfer starts, preventing IBI
status descriptors from being properly processed in PIO mode.

Include STAT_IBI_STATUS_THLD in pio->enabled_irqs so that the IBI
threshold interrupt is activated alongside error interrupts upon the first
transfer.

Fixes: 9ad9a52cce ("i3c/master: introduce the mipi-i3c-hci driver")
Co-developed-by: Patrick Yen <Patrick_Yen@asmedia.com.tw>
Signed-off-by: Patrick Yen <Patrick_Yen@asmedia.com.tw>
Signed-off-by: Jian-Ming Liao <Jm_Liao@asmedia.com.tw>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260818104106.763772-2-Jm_Liao@asmedia.com.tw
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Jian-Ming Liao 2026-08-18 18:41:04 +08:00 committed by Alexandre Belloni
parent ff2eee2b86
commit 308ecb824d
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/i3c/master/mipi-i3c-hci/pio.c
View File

@ -185,8 +185,11 @@ static void __hci_pio_init(struct i3c_hci *hci, u32 *size_val_ptr)
pio_reg_write(INTR_SIGNAL_ENABLE, 0x0);
pio_reg_write(INTR_STATUS_ENABLE, 0xffffffff);
/* Always accept error interrupts (will be activated on first xfer) */
pio->enabled_irqs = STAT_ALL_ERRORS;
/*
* Always accept error interrupts and IBI threshold interrupt
* (will be activated on first xfer).
*/
pio->enabled_irqs = STAT_ALL_ERRORS | STAT_IBI_STATUS_THLD;
}
static void hci_pio_suspend(struct i3c_hci *hci)