On Tue, 21 Jul 2015 19:37:17 +0200, R, Durgadoss wrote: > > Hi David, > > >-----Original Message----- > >From: Intel-gfx [mailto:intel-gfx-boun...@lists.freedesktop.org] On Behalf > >Of David Henningsson > >Sent: Tuesday, July 21, 2015 1:27 PM > >To: alsa-de...@alsa-project.org; intel-gfx@lists.freedesktop.org; > >ti...@suse.de; Vetter, Daniel; > >jani.nik...@linux.intel.com > >Cc: Koul, Vinod; David Henningsson > >Subject: [Intel-gfx] [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@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
