On Mon, 2017-04-24 at 13:47 +0300, Ander Conselvan de Oliveira wrote: > Display workaround #1139 for Geminilake instructs us to restrict HDMI > to 8 bpc when htotal is greater than 5460. Otherwise, the pipe is unable > to generate a proper signal and is left in a state where corruption is > seen with other modes. > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100440 > Cc: Shashank Sharma <shashank.sharma@xxxxxxxxx> > Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx> Perhaps this should have Fixes: 14292b7ff86f ("drm/i915: allow HDMI 2.0 clock rates") since it is only after that patch that the issue would be exposed, even though is not the cause for it. Jani? Ander > --- > drivers/gpu/drm/i915/intel_hdmi.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c > index 6efc3cb..52f0b2d 100644 > --- a/drivers/gpu/drm/i915/intel_hdmi.c > +++ b/drivers/gpu/drm/i915/intel_hdmi.c > @@ -1327,6 +1327,11 @@ static bool hdmi_12bpc_possible(struct intel_crtc_state *crtc_state) > return false; > } > > + /* Display Wa #1139 */ > + if (IS_GLK_REVID(dev_priv, 0, GLK_REVID_A1) && > + crtc_state->base.adjusted_mode.htotal > 5460) > + return false; > + > return true; > } > _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
