[Intel-gfx] [PATCH v3] drm/i915: Use 18 fast wake AUX sync len

[Hogander, Jouni]

On Fri, 2023-06-02 at 11:40 +0300, Luca Coelho wrote:
> On Tue, 2023-05-30 at 13:16 +0300, Jouni Högander wrote:
> > HW default for wake sync pulses is 18. 10 precarge and 8 preamble.
> > There is
> 
> Small typo: s/precarge/precharge/
> 
> 
> > no reason to change this especially as it is causing problems with
> > certain
> > eDP panels.
> > 
> > v3: Change "Fixes:" commit
> > v2: Remove "fast wake" repeat from subject
> > 
> > Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
> > Fixes: e1c71f8f9180 ("drm/i915: Fix fast wake AUX sync len")
> > Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8475
> > ---
> >  drivers/gpu/drm/i915/display/intel_dp_aux.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c
> > b/drivers/gpu/drm/i915/display/intel_dp_aux.c
> > index 0c27db8ae4f1..197c6e81db14 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c
> > @@ -129,7 +129,7 @@ static int intel_dp_aux_sync_len(void)
> >  
> >  static int intel_dp_aux_fw_sync_len(void)
> >  {
> > -       int precharge = 16; /* 10-16 */
> > +       int precharge = 10; /* 10-16 */
> >         int preamble = 8;
> >  
> >         return precharge + preamble;
> 
> If this really solves the problem, and since the comment clearly says
> that the range is from 10 to 16, it looks good to me.
> 
> Reviewed-by: Luca Coelho <luciano.coelho at intel.com>

Thank you Luca for the review. This is now pushed with your rb tag and
typo mentioned above fixed.

> 
> --
> Cheers,
> Luca.