Re: [PATCH 03/28] thunderbolt: Enable TMU access when accessing port space on legacy devices
From: Lukas Wunner
Date: Tue Jan 29 2019 - 16:59:03 EST
On Tue, Jan 29, 2019 at 06:01:18PM +0300, Mika Westerberg wrote:
> + if (enable)
> + value |= BIT(20);
Can we have a macro for this bit?
> +int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap)
> +{
> + int ret;
> +
> + ret = tb_port_enable_tmu(port, true);
> + if (ret)
> + return ret;
> +
> + ret = __tb_port_find_cap(port, cap);
> +
> + tb_port_enable_tmu(port, false);
> +
> + return ret;
> +}
Would there be a downside to setting the TMU bit on all ports all the time
(e.g. on switch enumeration)?
Thanks,
Lukas