<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [KBL] Can not choose correct refresh rate when using docking station" href="https://bugs.freedesktop.org/show_bug.cgi?id=98141#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [KBL] Can not choose correct refresh rate when using docking station" href="https://bugs.freedesktop.org/show_bug.cgi?id=98141">bug 98141</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>intel_dp_mst_compute_config() calculates tu size as 96: [ 73.890269] [drm:intel_dump_pipe_config [i915]] dp: 1, lanes: 2, gmch_m: 12425625, gmch_n: 8388608, link_m: 1035468, link_n: 1048576, tu: 96 But when we read it out we get 32 apparently: [ 79.467108] [drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in dp_m_n (expected tu 96 gmch 12425625/8388608 link 1035468/1048576, or tu 0 gmch 0/0 link 0/0, found tu 32, gmch 12425625/8388608 link 1035468/1048576) Bspec says "Restriction : In DisplayPort MST mode the Virtual Channel payload size must not be programmed greater than 62 (resulting payload size of 63)." which means our computed VC payload size would seem to be invalid. Someone should look into this.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>