On Tue, Sep 06, 2016 at 12:58:29PM +0300, Mika Kahola wrote:
> On Fri, 2016-09-02 at 11:05 +0300, Mika Kahola wrote:
> > +1 for this cleanup
> >
> > Reviewed-by: Mika Kahola <mika.kahola@xxxxxxxxx>
> Received couple of compiler warnings to be cleaned up
>
> drivers/gpu/drm/i915/intel_dp_link_training.c: In function
> ‘intel_dp_link_max_vswing_reached’:
> drivers/gpu/drm/i915/intel_dp_link_training.c:120:33: warning: suggest
> parentheses around comparison in operand of ‘&’ [-Wparentheses]
> if (intel_dp->train_set[lane] & DP_TRAIN_MAX_SWING_REACHED == 0)
Yep, will fix this warning and resubmit
Manasi
> ^
> drivers/gpu/drm/i915/intel_dp_link_training.c: In function
> ‘intel_dp_link_training_clock_recovery’:
> drivers/gpu/drm/i915/intel_dp_link_training.c:130:6: warning: unused
> variable ‘i’ [-Wunused-variable]
>
This unused variable 'i' gets removed in the following patch for
making clock recovery DP compliant.
Manasi
> >
> > On Thu, 2016-09-01 at 15:08 -0700, Manasi Navare wrote:
> > >
> > > From: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> > >
> > > Wrap the max. vswing check in a separate function.
> > > This makes the clock recovery phase of DP link training cleaner
> > >
> > > Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> > > ---
> > > drivers/gpu/drm/i915/intel_dp_link_training.c | 16 ++++++++++++---
> > > -
> > > 1 file changed, 12 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/intel_dp_link_training.c
> > > b/drivers/gpu/drm/i915/intel_dp_link_training.c
> > > index 0deebed..9145e5a 100644
> > > --- a/drivers/gpu/drm/i915/intel_dp_link_training.c
> > > +++ b/drivers/gpu/drm/i915/intel_dp_link_training.c
> > > @@ -112,6 +112,17 @@ intel_dp_update_link_train(struct intel_dp
> > > *intel_dp)
> > > return ret == intel_dp->lane_count;
> > > }
> > >
> > > +static bool intel_dp_link_max_vswing_reached(struct intel_dp
> > > *intel_dp)
> > > +{
> > > + int lane;
> > > +
> > > + for (lane = 0; lane < intel_dp->lane_count; lane++)
> > > + if (intel_dp->train_set[lane] &
> > > DP_TRAIN_MAX_SWING_REACHED == 0)
> > > + return false;
> > > +
> > > + return true;
> > > +}
> > > +
> > > /* Enable corresponding port and start training pattern 1 */
> > > static void
> > > intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp)
> > > @@ -170,10 +181,7 @@ intel_dp_link_training_clock_recovery(struct
> > > intel_dp *intel_dp)
> > > }
> > >
> > > /* Check to see if we've tried the max voltage */
> > > - for (i = 0; i < intel_dp->lane_count; i++)
> > > - if ((intel_dp->train_set[i] &
> > > DP_TRAIN_MAX_SWING_REACHED) == 0)
> > > - break;
> > > - if (i == intel_dp->lane_count) {
> > > + if (intel_dp_link_max_vswing_reached(intel_dp)) {
> > > ++loop_tries;
> > > if (loop_tries == 5) {
> > > DRM_ERROR("too many full retries,
> > > give up\n");
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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