[PATCH v3 02/13] drm/dp: use more of the extended receiver cap

[Lyude Paul]

…whoops, that was supposed to be:

Reviewed-by: Lyude Paul <lyude at redhat.com>

On Thu, 2021-09-09 at 12:18 -0400, Lyude Paul wrote:
> I thought I remembered an issue with this but looked up the previous emails,
> and it looks like that this change actually should be safe!
> 
> Signed-off-by: Lyude Paul <lyude at redhat.com>
> 
> On Thu, 2021-09-09 at 15:51 +0300, Jani Nikula wrote:
> > Extend the use of extended receiver cap at 0x2200 to cover
> > MAIN_LINK_CHANNEL_CODING_CAP in 0x2206, in case an implementation hides
> > the DP 2.0 128b/132b channel encoding cap.
> > 
> > v2: Extend to DP_RECEIVER_CAP_SIZE (Ville)
> > 
> > Cc: Lyude Paul <lyude at redhat.com>
> > Cc: dri-devel at lists.freedesktop.org
> > Cc: Manasi Navare <manasi.d.navare at intel.com>
> > Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> > ---
> >  drivers/gpu/drm/drm_dp_helper.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/drm_dp_helper.c
> > b/drivers/gpu/drm/drm_dp_helper.c
> > index 9b2a2961fca8..2e74b02ed96b 100644
> > --- a/drivers/gpu/drm/drm_dp_helper.c
> > +++ b/drivers/gpu/drm/drm_dp_helper.c
> > @@ -608,7 +608,7 @@ static u8 drm_dp_downstream_port_count(const u8
> > dpcd[DP_RECEIVER_CAP_SIZE])
> >  static int drm_dp_read_extended_dpcd_caps(struct drm_dp_aux *aux,
> >                                           u8 dpcd[DP_RECEIVER_CAP_SIZE])
> >  {
> > -       u8 dpcd_ext[6];
> > +       u8 dpcd_ext[DP_RECEIVER_CAP_SIZE];
> >         int ret;
> >  
> >         /*
> 

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat