Re: [PATCH] drm/amd/display: remove redundant check

[José Pekkarinen <jose.pekkarinen@xxxxxxxxxxx>]

On 2023-10-30 15:52, Aurabindo Pillai wrote:
> On 10/29/2023 8:44 AM, José Pekkarinen wrote:
> > This patch addresses the following warning spotted by
> > using coccinelle where the case checked does the same
> > than the else case.
> >
> > drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c:4664:8-10: 
> > WARNING: possible condition with no effect (if == else)
> >
> > Signed-off-by: José Pekkarinen <jose.pekkarinen@xxxxxxxxxxx>
> > ---
> >   .../drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c   | 4 
> > ----
> >   1 file changed, 4 deletions(-)
> >
> > diff --git 
> > a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c 
> > b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
> > index ecea008f19d3..d940dfa5ae43 100644
> > --- 
> > a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
> > +++ 
> > b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c
> > @@ -4661,10 +4661,6 @@ void dml32_CalculateMinAndMaxPrefetchMode(
> >   	} else if (AllowForPStateChangeOrStutterInVBlankFinal == 
> > dm_prefetch_support_uclk_fclk_and_stutter) {
> >   		*MinPrefetchMode = 0;
> >   		*MaxPrefetchMode = 0;
> > -	} else if (AllowForPStateChangeOrStutterInVBlankFinal ==
> > -			dm_prefetch_support_uclk_fclk_and_stutter_if_possible) {
> > -		*MinPrefetchMode = 0;
> > -		*MaxPrefetchMode = 3;
> >   	} else {
> >   		*MinPrefetchMode = 0;
> >   		*MaxPrefetchMode = 3;
>
> What tree did you use to generate the patch? On amd-staging-drm-next,
> MaxPrefetchMode is 0 for the second last branch, which is the correct
> one, so this patch isnt needed.

    I'm using the stable tree, sorry, if it is out of
date just ignore it then.

    Thanks!

    José.