On Wed, Apr 25, 2012 at 9:36 AM, Takashi Iwai <tiwai@xxxxxxx> wrote: > Hi Dave, > > in kernel bug 43155, we found out that the HDMI audio controller on > AMD graphics is also disabled when the graphics chip is disabled via > vga-switcher: > https://bugzilla.kernel.org/show_bug.cgi?id=43155 > > This screws up the sound driver, takes too long time for boot. > > Since the audio controller/codec becomes active again once when the > graphics is turned on, the best solution would be to add a client to > vga-swicheroo for handling the status of the HDMI audio controller. > > But, looking at the current vga_switcheroo.c, it seems that the > current code assumes only two clients and doesn't consider about > non-graphics PCI entries. > > As a workaround, I'm thiking of a sort of slave client belonging to > the video client, so that a callback like set_gpu_state() can be > called. I'd envisage some sort of notifier interface that other non-gpu drivers can hook into to be told about the current state of the GPU device. So some sort of separate client type with a callback when we turn on/off the device so other drivers can init themselves. Dave. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
