linux-kernel - [PATCH 3.12 078/170] vgaswitcheroo: switch the mux to the igp on power down when runpm is enabled

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Message-Id: <b7f5767932e6c8fc33f8b6961511fdafcf827e42.1405685481.git.jslaby@suse.cz>
Date:	Fri, 18 Jul 2014 14:11:23 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Alex Deucher <alexander.deucher@....com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 078/170] vgaswitcheroo: switch the mux to the igp on power down when runpm is enabled

From: Alex Deucher <alexander.deucher@....com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit f2bc561610962693be61425cf913778586d8f9c1 upstream.

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@....com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/gpu/vga/vga_switcheroo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index ec0ae2d1686a..6866448083b2 100644
--- 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;
 }
-- 
2.0.0

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