<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT SKL]igt@kms_pipe_crc_basic@suspend-read-crc-pipe-c fails suspend autoresume" href="https://bugs.freedesktop.org/show_bug.cgi?id=94566#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BAT SKL]igt@kms_pipe_crc_basic@suspend-read-crc-pipe-c fails suspend autoresume" href="https://bugs.freedesktop.org/show_bug.cgi?id=94566">bug 94566</a> from <a class="email" href="mailto:tiwai@suse.de" title="Takashi Iwai <tiwai@suse.de>"> Takashi Iwai</a> <pre>(In reply to Imre Deak from <a href="show_bug.cgi?id=94566#c13">comment #13</a>) > There is no guarantee which module gets loaded first and so no guarantee > that you won't get the "failed to add i915 component master (-19)" error. > The only proper way to solve this is to initialize anything needing the > display driver from the component bind hook (hdac_component_master_bind). Yes, but the reason we didn't do this is because we heard that the i915 powerwell has to be enabled *before* the codec gets probed. So, it's rather surprising that the codec probe succeeded even without the powerwell hook. Maybe it just worked because they were probed in parallel. Or, the information from Intel hardware team might be wrong. Who knows. And, we can't block for syncing with i915 slave bind at the HD-audio bus probe time, either. There are SKL systems without i915 graphics, and the same HD-audio bus is used for the Realtek codec for builtin audio. So, the missing i915 binding is no fatal error on such systems. That said, the current non-blocking behavior is on purpose. But, *if* the codec probe would work without the powerwell hook in the controller side beforehand, we an put the blocking component binding again at the codec probe. This might work -- but the technical information is missing whether it's correct or not.</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> <li>You are the assignee for the bug.</li> </ul> </body> </html>