On Tue, 17 Jul 2018 10:56:37 +0200, jimqu wrote:
On 2018年07月17日 16:52, Takashi Iwai wrote:
On Tue, 17 Jul 2018 10:38:58 +0200, Lukas Wunner wrote:
On Tue, Jul 17, 2018 at 04:20:50PM +0800, Jim Qu wrote:
On modern laptop, there are more and more platforms have two GPUs, and each of them maybe have audio codec for HDMP/DP output. For some dGPU which is no output, audio codec usually is disabled.
In currect HDA audio driver, it will set all codec as VGA_SWITCHEROO_DIS, the audio which is binded to UMA will be suspended if user use debugfs to contorl power
In HDA driver side, it is difficult to know which GPU the audio has binded to. So set the bound gpu pci dev to vga_switcheroo.
if the audio client is not the third registration, audio id will set in vga_switcheroo enable function. if the audio client is the last registration when vga_switcheroo _ready() get true, we should get audio client id from bound GPU directly.
Signed-off-by: Jim Qu Jim.Qu@amd.com
Reviewed-by: Lukas Wunner lukas@wunner.de
@Takashi, any preference which tree to merge this through? sound or drm-misc, either way would seem fine to me. I think there's going to be one final drm-misc pull sent to Dave this week, after that it's 4.20.
Since it's basically an audio problem and I'd love to merge it for 4.19, I'd prefer taking through sound git tree, unless anyone has objection.
Thanks to Takashi and Lukas great help. Please kindly help merge the patch into suitable branch.
I pushed the fix to topic/vga_switcheroo branch of sound git tree now so that 0day bot can check it. I'll wait for a while and merge it later to for-next branch if nothing happens.
The brach is (and will be) based on fresh 4.18-rc5 so that other trees may merge it cleanly.
thanks,
Takashi