When switching the display on muxed machines, we currently force the HDA controller into runtime suspend on the previously used GPU and into runtime active state on the newly used GPU.
That's unnecessary if the GPU uses driver power control, we can just let the audio device autosuspend or autoresume as it sees fit.
Cc: Dave Airlie airlied@redhat.com Cc: Ben Skeggs bskeggs@redhat.com Cc: Takashi Iwai tiwai@suse.de Cc: Peter Wu peter@lekensteyn.nl Cc: Alex Deucher alexander.deucher@amd.com Signed-off-by: Lukas Wunner lukas@wunner.de --- drivers/gpu/vga/vga_switcheroo.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c index 4ee0ed642386..fc4adf3d34e8 100644 --- a/drivers/gpu/vga/vga_switcheroo.c +++ b/drivers/gpu/vga/vga_switcheroo.c @@ -686,7 +686,9 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client)
active->active = false;
- set_audio_state(active->id, VGA_SWITCHEROO_OFF); + /* let HDA controller autosuspend if GPU uses driver power control */ + if (!active->driver_power_control) + set_audio_state(active->id, VGA_SWITCHEROO_OFF);
if (new_client->fb_info) { struct fb_event event; @@ -709,7 +711,9 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client) if (vga_switcheroo_pwr_state(active) == VGA_SWITCHEROO_ON) vga_switchoff(active);
- set_audio_state(new_client->id, VGA_SWITCHEROO_ON); + /* let HDA controller autoresume if GPU uses driver power control */ + if (!new_client->driver_power_control) + set_audio_state(new_client->id, VGA_SWITCHEROO_ON);
new_client->active = true; return 0;