On 2/8/2022 5:59 PM, Marek Szyprowski wrote:
There is something wrong with this patch. Since it landed in linux-next
(20220204) I get an interrupt storm on two of my test devices:
1. ARM 32bit Exynos4412-based Trats2 ("wm8994-codec wm8994-codec: FIFO
error" message)
2. ARM 64bit Exynos5433-based TM2e ("arizona spi1.0: Mixer dropped
sample" message)
Definitely the interrupts are not acknowledged properly. Once I find
some spare time, I will check it further which regmap configuration
triggers the issue, but it is definitely related to this patch.
Reverting it on top of current linux-next fixes the issue.
Change is needed to handle the interrupt ack properly to clear the ack.
I observed that the regmap_irq_update_bits() writes the register only if
it finds a difference b/w existing reg value to update reg value.
This may be causing the interrupt storm issue mentioned above.
Setting the mask_writeonly flag to 1, to force write the register may
resolve the interrupt storm issue.
--Prasad
