On Mon, 16 Oct 2017, Rodrigo Vivi <[email protected]> wrote: > From: Clint Taylor <[email protected]> > > DDIA Lane capability control 4 lane bit is not being set by firmware during > clone mode boot. This occurs when multiple monitors are connected during > boot. The driver will configure the port for 2 lane maximum width if this > bit is not set.
Please be more specific about what you mean with clone mode. > > Cc: Mika Kahola <[email protected]> > Signed-off-by: Clint Taylor <[email protected]> > Signed-off-by: Rodrigo Vivi <[email protected]> > --- > drivers/gpu/drm/i915/intel_ddi.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_ddi.c > b/drivers/gpu/drm/i915/intel_ddi.c > index a9c0c16e3838..0ad915d71132 100644 > --- a/drivers/gpu/drm/i915/intel_ddi.c > +++ b/drivers/gpu/drm/i915/intel_ddi.c > @@ -2791,9 +2791,10 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, > enum port port) > * configuration so that we use the proper lane count for our > * calculations. > */ The comment above needs updating too. Also, it doesn't say anything about cloning. BR, Jani. > - if (IS_GEN9_LP(dev_priv) && port == PORT_A) { > + if ((IS_GEN9_LP(dev_priv) || IS_CANNONLAKE(dev_priv)) && > + port == PORT_A) { > if (!(intel_dig_port->saved_port_bits & DDI_A_4_LANES)) { > - DRM_DEBUG_KMS("BXT BIOS forgot to set DDI_A_4_LANES for > port A; fixing\n"); > + DRM_DEBUG_KMS("BIOS forgot to set DDI_A_4_LANES for > port A\n"); > intel_dig_port->saved_port_bits |= DDI_A_4_LANES; > max_lanes = 4; > } -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
