<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> <div class="moz-cite-prefix">Looks like the DC code can't correctly take care of the difference between CZ and Tonga. Harry how should we handle this? Either not set the bit on older hardware or fix DC to just ignore it there? To be honest I would prefer not to set a bit at all and just always program the relevant bits on hardware which supports this. Regards, Christian. Am 27.10.2017 um 13:25 schrieb Tom St Denis: </div> <blockquote type="cite" cite="mid:34eb4b13-8c81-d63e-96e5-381262c63847@amd.com">The following commit: [root@fx6 linux]# git bisect good aa7187c5c640559ebc02caa0191c0db46b55b4a6 is the first bad commit commit aa7187c5c640559ebc02caa0191c0db46b55b4a6 Author: Christian König <a class="moz-txt-link-rfc2396E" href="mailto:christian.koenig@amd.com"><christian.koenig@amd.com></a> Date: Thu Oct 26 12:00:36 2017 +0200 drm/amd/display: enable GPU VM support Just set the bit so that DC does the hardware programming. Signed-off-by: Christian König <a class="moz-txt-link-rfc2396E" href="mailto:christian.koenig@amd.com"><christian.koenig@amd.com></a> Reviewed-by: Andrey Grodzovsky <a class="moz-txt-link-rfc2396E" href="mailto:andrey.grodzovsky@amd.com"><andrey.grodzovsky@amd.com></a> :040000 040000 c6d725acce6507b6d9381667d828e8e0d4683af7 2dfcfab32ef3e7d24a31eb420dd1186cf973cd7d M drivers Results in the (attached) dmesg logs on my Tonga system. Cheers, Tom <fieldset class="mimeAttachmentHeader"></fieldset> <pre wrap="">_______________________________________________ amd-gfx mailing list <a class="moz-txt-link-abbreviated" href="mailto:amd-gfx@lists.freedesktop.org">amd-gfx@lists.freedesktop.org</a> <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/amd-gfx">https://lists.freedesktop.org/mailman/listinfo/amd-gfx</a> </pre> </blockquote> </body> </html>