Em Sex, 2018-06-15 às 20:44 +0300, Ville Syrjala escreveu: > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > The PCH transcoder registers are only 12 bits wide for the hdisplay > and hblank_start values. On HSW/BDW the CPU side registers are 13 > bits wide. intel_mode_valid() only checks against the higher limit > (since we don't know where the mode is to be used), so an extra > check is required against the FDI limits. > > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/i915/intel_crt.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/drivers/gpu/drm/i915/intel_crt.c > b/drivers/gpu/drm/i915/intel_crt.c > index 95aa29cf2d9c..457b1a2d05b8 100644 > --- a/drivers/gpu/drm/i915/intel_crt.c > +++ b/drivers/gpu/drm/i915/intel_crt.c > @@ -333,6 +333,10 @@ intel_crt_mode_valid(struct drm_connector > *connector, > (ironlake_get_lanes_required(mode->clock, 270000, 24) > > 2)) > return MODE_CLOCK_HIGH; > > + /* HSW/BDW FDI limited to 4k */ > + if (mode->hdisplay > 4096) > + return MODE_H_ILLEGAL; > + > return MODE_OK; > } > > @@ -375,6 +379,11 @@ static bool hsw_crt_compute_config(struct > intel_encoder *encoder, > if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) > return false; > > + /* HSW/BDW FDI limited to 4k */ > + if (adjusted_mode->crtc_hdisplay > 4096 || > + adjusted_mode->crtc_hblank_start > 4096) > + return false; Meh, doubling checks is not cool. By the way, doesn't this chunk make more sense inside ironlake_fdi_compute_config()? Just to make sure: the only cases that could escape mode_valid() and make it into compute_config() are for panel fitting, right? With or without changes: Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx> Thanks, Paulo > + > pipe_config->has_pch_encoder = true; > > /* LPT FDI RX only supports 8bpc. */ _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
