vgaswitcheroo: switch the mux to the igp on power down when runpm is enabled

Avoids blank screens on muxed systems when runpm is active.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=75917

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index ec0ae2d..6866448 100644 (file)
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -623,7 +623,8 @@ static int vga_switcheroo_runtime_suspend(struct device *dev)
        ret = dev->bus->pm->runtime_suspend(dev);
        if (ret)
                return ret;
-
+       if (vgasr_priv.handler->switchto)
+               vgasr_priv.handler->switchto(VGA_SWITCHEROO_IGD);
        vga_switcheroo_power_switch(pdev, VGA_SWITCHEROO_OFF);
        return 0;
 }