linux-kernel - [255/272] drm/i915: check eDP encoder correctly when setting modes

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Date:	Tue, 15 Feb 2011 16:15:12 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Chris Wilson <chris@...is-wilson.co.uk>
Subject: [255/272] drm/i915: check eDP encoder correctly when setting modes

2.6.37-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Jesse Barnes <jbarnes@...tuousgeek.org>

commit 858bc21f0637c407601a05626854ae58b242f75d upstream.

We were using a stale pointer in the check which caused us to use CPU
attached DP params when we should have been using PCH attached params.

Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=31988
Tested-by: Jan-Hendrik Zab <jan@....name>
Tested-by: Christoph Lukas <christoph.lukas@....net>
Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/i915/intel_display.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3714,7 +3714,7 @@ static int intel_crtc_mode_set(struct dr
 		int lane = 0, link_bw, bpp;
 		/* CPU eDP doesn't require FDI link, so just set DP M/N
 		   according to current link config */
-		if (has_edp_encoder && !intel_encoder_is_pch_edp(&encoder->base)) {
+		if (has_edp_encoder && !intel_encoder_is_pch_edp(&has_edp_encoder->base)) {
 			target_clock = mode->clock;
 			intel_edp_link_config(has_edp_encoder,
 					      &lane, &link_bw);


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