On Tue, 21 Jul 2015 19:37:17 +0200, R, Durgadoss wrote: > > Hi David, > > >-----Original Message----- > >From: Intel-gfx [mailto:intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of David Henningsson > >Sent: Tuesday, July 21, 2015 1:27 PM > >To: alsa-devel@xxxxxxxxxxxxxxxx; intel-gfx@xxxxxxxxxxxxxxxxxxxxx; tiwai@xxxxxxx; Vetter, Daniel; > >jani.nikula@xxxxxxxxxxxxxxx > >Cc: Koul, Vinod; David Henningsson > >Subject: [PATCH 0/4] i915 to call hda driver on HDMI plug/unplug > > > >This patch set aims to resolve three problems: > > > > * The first - and most serious one - is that the audio driver is not woken up > > properly when in power save modes, especially not when the HDA controller is > > in D3. By having the i915 driver call directly into the hda driver, the HDA > > driver is always notified that an HDMI hotplug event has happened. > > > > * Second, there is currently no way for userspace to match an HDMI audio output > > with an HDMI video output. We fix this by sending connector_type and > > connector_type_id in the HDMI hotplug callback. > > > > * Third, writing ELD info to the hardware just so the HDA driver can read it > > from the hardware seems a bit inefficient. We could just pass that information > > in the callback, too. > > > >The patch in its current form fixes the first of these problems and provides most > >of the infrastructure for the second and third problem. > > > >The patch set is based on 4.2rc2 + my recent codec wakeup patch. So far, it has > >been tested (and working) on one Skylake machine. > > I believe you tested these patches with hda driver after few cycles of D3. > By any chance, did you also try this once after i915 driver's D3 cycle also ? > In this case, can the check_presence_and_report() function get the > pin presence and ELD valid bits read out properly..? The code path will call power well on, thus the i915 driver will be woken up, in anyway. thanks, Takashi _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
