Quoting ville.syrjala@xxxxxxxxxxxxxxx (2016-04-01 16:37:25) > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > intel_crtc->config->cpu_transcoder isn't yet filled out when > intel_crtc_mode_get() gets called during output probing, so we should > not use it there. Instead intel_crtc_mode_get() figures out the correct > transcoder on its own, and that's what we should use. > > If the BIOS boots LVDS on pipe B, intel_crtc_mode_get() would actually > end up reading the timings from pipe A instead (since PIPE_A==0), > which clearly isn't what we want. > > It looks to me like this may have been broken by > commit eccb140bca67 ("drm/i915: hw state readout&check support for cpu_transcoder") > as that one removed the early initialization of cpu_transcoder from > intel_crtc_init(). > > Cc: stable@xxxxxxxxxxxxxxx > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx > Cc: Rob Kramer <rob@xxxxxxxxxxxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> > Reported-by: Rob Kramer <rob@xxxxxxxxxxxxxxxxxx> > Fixes: eccb140bca67 ("drm/i915: hw state readout&check support for cpu_transcoder") > References: https://lists.freedesktop.org/archives/dri-devel/2016-April/104142.html > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Matches the writing on the tin. The effect is to s/intel_crtc->config->cpu_transcoder/intel_crtc->pipe/ and aiui, the dvo path will call this before intel_crtc->config->cpu_transcoder is ever set. Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> -Chris _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel