Messages in this thread | | | From | Fabio Estevam <> | Date | Mon, 10 Jan 2022 13:28:54 -0300 | Subject | Re: HRNG in CAAM isn't working properly on IMX6 SoloX |
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Hi Horia,
On Mon, Aug 30, 2021 at 8:49 AM Fabio Estevam <festevam@gmail.com> wrote:
> We also observe this issue. > > Heiko on Cc tried increasing the RTSDCTL_ENT_DLY_MIN value > and this seems to help: > > diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h > index af61f3a2c0d4..53c9fa04a24c 100644 > --- a/drivers/crypto/caam/regs.h > +++ b/drivers/crypto/caam/regs.h > @@ -513,7 +513,7 @@ struct rng4tst { > }; > #define RTSDCTL_ENT_DLY_SHIFT 16 > #define RTSDCTL_ENT_DLY_MASK (0xffff << RTSDCTL_ENT_DLY_SHIFT) > -#define RTSDCTL_ENT_DLY_MIN 3200 > +#define RTSDCTL_ENT_DLY_MIN 4800 > #define RTSDCTL_ENT_DLY_MAX 12800 > u32 rtsdctl; /* seed control register */ > union {
Even with the change above we get the following errors on a imx6sx-based board running 5.10.y:
[ 0.918126] caam 2100000.crypto: registering rng-caam [ 22.598192] caam_jr 2101000.jr: 2000025b: CCB: desc idx 2: RNG: Hardware error [ 22.598260] caam_jr 2101000.jr: 20003c5b: CCB: desc idx 60: RNG: Hardware error [ 22.598324] caam_jr 2101000.jr: 20003c5b: CCB: desc idx 60: RNG: Hardware error [ 22.598368] caam_jr 2101000.jr: 20003c5b: CCB: desc idx 60: RNG: Hardware error
What is the proper way to fix this issue?
Thanks,
Fabio Estevam
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