[PATCH 01/35] drm/amd/display: Use udelay when waiting between aux retries

[sylvain.bertrand at gmail.com]

On Fri, Feb 01, 2019 at 07:16:17PM +0000, Wentland, Harry wrote:
> On 2019-02-01 12:31 p.m., sylvain.bertrand at gmail.com wrote:
> > On Fri, Feb 01, 2019 at 10:28:13AM -0500, Bhawanpreet Lakha wrote:
> >> From: John Barberiz <John.Barberiz at amd.com>
> >> [How]
> >> msleep is inaccurate for small values. Used udelay
> >> instead for accuracy.
> > 
> > Hi,
> > 
> > Should it be the case for non-DC displayport code too?
> > 
> 
> I don't think we're actually using this code on Linux. It's part of the shared codebase with Windows. Apparently there msleep would often sleep longer than 1ms.
> 
> drm_dp_dpcd_access already has a tighter bound on the sleep between retries (500-600 us), so I imagine we're fine there.

Do you mean non-DC displayport related code is already using udelay instead of msleep on linux?

-- 
Sylvain