[PATCH 4/6] accel/ivpu/40xx: Disable frequency change interrupt

[Jeffrey Hugo]

On 9/25/2023 6:11 AM, Stanislaw Gruszka wrote:
> From: Karol Wachowski <karol.wachowski at linux.intel.com>
> 
> Do not enable frequency change interrupt on 40xx as it might
> lead to an interrupt storm in current design.
> 
> FREQ_CHANGE interrupt is triggered on D0I2 entry which will cause
> KMD to check VPU interrupt sources by reading VPUIP registers.
> Access to those registers will toggle necessary clocks and trigger
> another FREQ_CHANGE interrupt possibly ending in an infinite loop.
> 
> FREQ_CHANGE interrupt has only debug purposes and can be permanently
> disabled.
> 
> Fixes: 79cdc56c4a54 ("accel/ivpu: Add initial support for VPU 4")
> Signed-off-by: Karol Wachowski <karol.wachowski at linux.intel.com>
> Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka at linux.intel.com>
> Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka at linux.intel.com>

Reviewed-by: Jeffrey Hugo <quic_jhugo at quicinc.com>