<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#c29">Comment # 29</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:imre.deak@intel.com" title="Imre Deak <imre.deak@intel.com>"> Imre Deak</a> <pre>(In reply to Takashi Iwai from <a href="show_bug.cgi?id=94566#c25">comment #25</a>) > (In reply to Imre Deak from <a href="show_bug.cgi?id=94566#c24">comment #24</a>) > > (In reply to Takashi Iwai from <a href="show_bug.cgi?id=94566#c22">comment #22</a>) > > > (In reply to Imre Deak from <a href="show_bug.cgi?id=94566#c20">comment #20</a>) > > > > (In reply to Takashi Iwai from <a href="show_bug.cgi?id=94566#c17">comment #17</a>) > > > > > And, one more problem is that we gather up the all codecs as a single card. > > > > > Blocking a probe of one codec means to block the probe of the whole card. > > > > > So we can't take unlimited block behavior. > > > > > > > > Can you still separate interface registration from HW access? I assume the > > > > latter could be delay until the user first opens the device node, so you > > > > could do the blocking there and register the corresponding interface earlier. > > > > > > It's difficult, unfortunately. HDMI codec may provide multiple streams (or > > > even zero stream), and for knowing how many streams, we need to probe. So, > > > without probing, we don't know which device interface to provide. > > > > > > And, on SKL architecture, the HDMI codec is on the same HDA bus that is > > > represented as a single sound card instance. > > > > Why can't the HDMI codec be on a separate sound card? > > Because currently we build the card per PCI controller, as the PCI > controller governs the stream DMA. Ok, but is it in practice possible? Sound card looks like a software abstraction to me, behind which you could implement your own way of arbitrating access to the HW among the separate sound cards.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>