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Gmane
From: Dave Airlie <airlied <at> gmail.com>
Subject: [PATCH] drm/radeon: fix regression on atom cards with hardcoded EDID record.
Newsgroups: gmane.comp.video.dri.devel
Date: Sunday 1st May 2011 10:16:30 UTC (over 5 years ago)
From: Dave Airlie 

Since fafcf94e2b5732d1e13b440291c53115d2b172e9 introduced an edid size, it
seems to have broken this path.

This manifest as oops on T500 Lenovo laptops with dual graphics primarily.

Should fix: https://bugzilla.kernel.org/show_bug.cgi?id=33812

Signed-off-by: Dave Airlie 
cc: [email protected]
---
 drivers/gpu/drm/radeon/radeon_atombios.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c
b/drivers/gpu/drm/radeon/radeon_atombios.c
index f5d12fb..f116516 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1599,9 +1599,10 @@ struct radeon_encoder_atom_dig
*radeon_atombios_get_lvds_info(struct
 							memcpy((u8 *)edid, (u8 *)&fake_edid_record->ucFakeEDIDString[0],
 							       fake_edid_record->ucFakeEDIDLength);
 
-							if (drm_edid_is_valid(edid))
+							if (drm_edid_is_valid(edid)) {
 								rdev->mode_info.bios_hardcoded_edid = edid;
-							else
+								rdev->mode_info.bios_hardcoded_edid_size = edid_size;
+							} else
 								kfree(edid);
 						}
 					}
-- 
1.7.4.2
 
CD: 11ms