On 26.03.2019 11:31, 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.valkei...@ti.com> Reviewed-by: Andrzej Hajda <a.ha...@samsung.com>
-- Regards Andrzej > --- > 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 > + tmp[0] = tmp[1] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | > DP_TRAIN_PRE_EMPH_LEVEL_0; > + ret = drm_dp_dpcd_write(aux, DP_TRAINING_LANE0_SET, tmp, 2); > + if (ret < 0) > + goto err_dpcd_write; > + > ret = tc_link_training(tc, DP_TRAINING_PATTERN_1); > if (ret) > goto err; _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
