Message ID | 20231019222725.3598022-7-Frank.Li@nxp.com |
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State | New |
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Series |
i3c: master: svc: collection of bugs fixes
|
|
Commit Message
Frank Li
Oct. 19, 2023, 10:27 p.m. UTC
master side report:
silvaco-i3c-master 44330000.i3c-master: Error condition: MSTATUS 0x020090c7, MERRWARN 0x00100000
BIT 20: TIMEOUT error
The module has stalled too long in a frame. This happens when:
- The TX FIFO or RX FIFO is not handled and the bus is stuck in the
middle of a message,
- No STOP was issued and between messages,
- IBI manual is used and no decision was made.
The maximum stall period is 100 μs.
This is a just warning. System irq thread schedule latency is possible
bigger than 100us. Just omit this waring.
Fixes: dd3c52846d59 ("i3c: master: svc: Add Silvaco I3C master driver")
Cc: stable@vger.kernel.org
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
Notes:
Change from v2 to v3
- remove 10k at commit message
Change from v1 to v2
-none
Change from v1 to v2
-none
drivers/i3c/master/svc-i3c-master.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index 1a57fdebaa26d..fedb31e0076c4 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -93,6 +93,7 @@ #define SVC_I3C_MINTMASKED 0x098 #define SVC_I3C_MERRWARN 0x09C #define SVC_I3C_MERRWARN_NACK BIT(2) +#define SVC_I3C_MERRWARN_TIMEOUT BIT(20) #define SVC_I3C_MDMACTRL 0x0A0 #define SVC_I3C_MDATACTRL 0x0AC #define SVC_I3C_MDATACTRL_FLUSHTB BIT(0) @@ -226,6 +227,11 @@ static bool svc_i3c_master_error(struct svc_i3c_master *master) if (SVC_I3C_MSTATUS_ERRWARN(mstatus)) { merrwarn = readl(master->regs + SVC_I3C_MERRWARN); writel(merrwarn, master->regs + SVC_I3C_MERRWARN); + + /* ignore timeout error */ + if (merrwarn & SVC_I3C_MERRWARN_TIMEOUT) + return false; + dev_err(master->dev, "Error condition: MSTATUS 0x%08x, MERRWARN 0x%08x\n", mstatus, merrwarn);