linux-kernel - [PATCH] drm/nouveau: fix panels using straps-based mode detection

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Date:	Thu, 23 Sep 2010 16:44:01 +1000
From:	Ben Skeggs <skeggsb@...il.com>
To:	dri-devel@...ts.freedesktop.org
Cc:	airlied@...hat.com, linux-kernel@...r.kernel.org,
	Ben Skeggs <bskeggs@...hat.com>
Subject: [PATCH] drm/nouveau: fix panels using straps-based mode detection

From: Ben Skeggs <bskeggs@...hat.com>

nouveau_bios_fp_mode() zeroes the mode struct before filling in relevant
entries.  This nukes the mode id initialised by drm_mode_create(), and
causes warnings from idr when we try to remove the mode.

Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
---
 drivers/gpu/drm/nouveau/nouveau_connector.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 98c214c..4b286a8 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -594,8 +594,10 @@ nouveau_connector_get_modes(struct drm_connector *connector)
 	if (nv_encoder->dcb->type == OUTPUT_LVDS &&
 	    (nv_encoder->dcb->lvdsconf.use_straps_for_mode ||
 	     dev_priv->vbios.fp_no_ddc) && nouveau_bios_fp_mode(dev, NULL)) {
-		nv_connector->native_mode = drm_mode_create(dev);
-		nouveau_bios_fp_mode(dev, nv_connector->native_mode);
+		struct drm_display_mode mode;
+
+		nouveau_bios_fp_mode(dev, &mode);
+		nv_connector->native_mode = drm_mode_duplicate(dev, &mode);
 	}
 
 	/* Find the native mode if this is a digital panel, if we didn't
-- 
1.7.2.2

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