[PATCHv2 02/22] drm/bridge: tc358767: reset voltage-swing & pre-emphasis

[Andrey Smirnov]

On Fri, Apr 26, 2019 at 7:14 AM Tomi Valkeinen <tomi.valkeinen at ti.com> wrote:
>
> On 20/04/2019 23:30, Laurent Pinchart wrote:
> > Hi Tomi,
> >
> > Thank you for the patch.
> >
> > On Tue, Mar 26, 2019 at 12:31:26PM +0200, Tomi Valkeinen wrote:
> >> We need to reset DPCD voltage-swing & pre-emphasis before starting the
> >> link training, as otherwise tc358767 will use the previous values as
> >> minimums.
> >>
> >> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
> >> ---
> >>  drivers/gpu/drm/bridge/tc358767.c | 6 ++++++
> >>  1 file changed, 6 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
> >> index 7031c4f52c57..11a50f7bb4be 100644
> >> --- a/drivers/gpu/drm/bridge/tc358767.c
> >> +++ b/drivers/gpu/drm/bridge/tc358767.c
> >> @@ -956,6 +956,12 @@ static int tc_main_link_setup(struct tc_data *tc)
> >>      if (ret < 0)
> >>              goto err_dpcd_write;
> >>
> >> +    // Reset voltage-swing & pre-emphasis
> >
> > The driver uses C-style comments, I think it would be best to stick to
> > them to avoid a style mismatch.
>
> Oops. Yep. I often use c++ comments when hacking/developing as they're
> often easier to use. Sometimes I miss converting them to c comments...
>
> >
> >> +    tmp[0] = tmp[1] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0;
> >
> > You may want to wrap the line.
>
> Well, I personally don't think wrapping at 80 is a good idea.

Trying to read two files side by side on a 13" laptop screen might
change your mind :-) +1 on wrapping the code around 80 character from
me.

Thanks,
Andrey Smirnov