4.9-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 2.6.32.17 / drm-radeon-kms-fix-legacy-lvds-dpms-sequence.patch

From 15cb02c0a0338ee724bf23e31c7c410ecbffeeba Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Wed, 21 Jul 2010 19:37:21 -0400
Subject: drm/radeon/kms: fix legacy LVDS dpms sequence

From: Alex Deucher <alexdeucher@gmail.com>

commit 15cb02c0a0338ee724bf23e31c7c410ecbffeeba upstream.

Add delay after turning off the LVDS encoder.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=16389

Tested-by: Jan Kreuzer <kontrollator@gmx.de>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/gpu/drm/radeon/radeon_legacy_encoders.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
@@ -89,6 +89,7 @@ static void radeon_legacy_lvds_dpms(stru
 		udelay(panel_pwr_delay * 1000);
 		WREG32(RADEON_LVDS_GEN_CNTL, lvds_gen_cntl);
 		WREG32_PLL(RADEON_PIXCLKS_CNTL, pixclks_cntl);
+		udelay(panel_pwr_delay * 1000);
 		break;
 	}