<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [BXT/KBL] - HDMI - HD audio passthrough dont work" href="https://bugs.freedesktop.org/show_bug.cgi?id=98797#c103">Comment # 103</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - [BXT/KBL] - HDMI - HD audio passthrough dont work" href="https://bugs.freedesktop.org/show_bug.cgi?id=98797">bug 98797</a> from <a class="email" href="mailto:libin.yang@intel.com" title="Libin Yang <libin.yang@intel.com>"> Libin Yang</a> <pre> > > If I may add, Dolby Digital and DTS passthrough works and Stereo PCM works. > These are all limited to 1.5Mbps per the S/PDIF specs. Is it possible DP is > being subjected to the limits of the S/PDIF specs in the DRM driver? > Dolby Digital and DTS is not HBR audio and it should always work. For this issue, I think we should make sure whether audio driver support HBR audio or not. In my opnion, both Audio driver and gfx driver need some patches to support HBR audio. I don't think only effort in gfx driver can make HBR audio work if audio driver doesn't support HBR audio. > Per Wikipedia: > S/PDIF can carry two channels of uncompressed PCM audio or compressed > 5.1/7.1 surround sound (such as DTS audio codec); it cannot support lossless > formats (other than 2ch LPCM) such as Dolby TrueHD and DTS-HD Master Audio, > that require greater bandwidth[2] like that available with HDMI or > DisplayPort. Yes, this is the same status 2 years before we did the test.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>