On Fri, 16 Sep 2022, Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx> wrote: > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > We don't parse the VBT vswing/preemphassis tables at all currently. > Let's WARN if a port wants to use them so we get a heads up that > whether we really need to implement this stuff or not. My > current stash contains no VBTs with this bit set. > > v2: Move to print_ddi_port() (Jani) > > Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> LGTM. Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx> > --- > drivers/gpu/drm/i915/display/intel_bios.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c > index 28bdb936cd1f..4c543e8205ca 100644 > --- a/drivers/gpu/drm/i915/display/intel_bios.c > +++ b/drivers/gpu/drm/i915/display/intel_bios.c > @@ -2676,6 +2676,14 @@ static void print_ddi_port(const struct intel_bios_encoder_data *devdata, > drm_dbg_kms(&i915->drm, > "Port %c VBT DP max link rate: %d\n", > port_name(port), dp_max_link_rate); > + > + /* > + * FIXME need to implement support for VBT > + * vswing/preemph tables should this ever trigger. > + */ > + drm_WARN(&i915->drm, child->use_vbt_vswing, > + "Port %c asks to use VBT vswing/preemph tables\n", > + port_name(port)); > } > > static void parse_ddi_port(struct intel_bios_encoder_data *devdata) -- Jani Nikula, Intel Open Source Graphics Center
