<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [regression] Loss of i915 (Apollo Lake/Broxton) HDMI audio after display sleep v4.14+" href="https://bugs.freedesktop.org/show_bug.cgi?id=104952#c13">Comment # 13</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [regression] Loss of i915 (Apollo Lake/Broxton) HDMI audio after display sleep v4.14+" href="https://bugs.freedesktop.org/show_bug.cgi?id=104952">bug 104952</a> from <a class="email" href="mailto:imre.deak@intel.com" title="Imre Deak <imre.deak@intel.com>"> Imre Deak</a> <pre>Created <a href="attachment.cgi?id=137246" name="attach_137246" title="Save/restore AUD_FREQ_CNTRL">attachment 137246</a> <a href="attachment.cgi?id=137246&action=edit" title="Save/restore AUD_FREQ_CNTRL">[details]</a> <a href='page.cgi?id=splinter.html&bug=104952&attachment=137246'>[review]</a> Save/restore AUD_FREQ_CNTRL (In reply to Jani Nikula from <a href="show_bug.cgi?id=104952#c12">comment #12</a>) > Imre, was looking at bspec for other stuff, might bspec id 19620 be related? Most of the context save/restore described there is done (or should be done) by the audio driver; I haven't checked that part in detail, I hope the audio people can do that. Two things from the save/restore sequence must be done on the display driver side (since the registers belong to it): programming HSW_AUD_CHICKENBIT and saving/restoring SKL_AUD_FREQ_CNTRL . I haven't found anything in the driver about the latter one. Simon could you try if the attached patch makes a difference for you (providing the dmesg in any case)?</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>