<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [CI][DRMTIP] igt@* - dmesg-warn / dmesg-fail - *ERROR* CPU pipe [ABC] FIFO underrun" href="https://bugs.freedesktop.org/show_bug.cgi?id=107724#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [CI][DRMTIP] igt@* - dmesg-warn / dmesg-fail - *ERROR* CPU pipe [ABC] FIFO underrun" href="https://bugs.freedesktop.org/show_bug.cgi?id=107724">bug 107724</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>The pipe C IIR noise is a bit odd. Bspec it seems to be telling me that these registers live in PG2, whereas the code appears to assume that the register lives in whatever power well the pipe lives in. So that might be a bit wrong in the code (though it should probably still work just fine) or the spec is wrong. Either way since all the power wells up to pg4 should be enabled it shouldn't really matter here either way. I agree with Paulo that DMC might have something to do with this as well. The WARN_ON(!intel_pstate->base.fb) is also mysterious. We should have either reused the BIOS fb or disabled all the planes. So can't really see how an enabled plane could get that far without a framebuffer.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>