From 05fa7ea7d23980de0014417a0e0af2048a0f9fc1 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 11 May 2011 14:02:07 -0400 Subject: [PATCH] drm/radeon/kms: fix extended lvds info parsing On rev <= 1.1 tables, the offset is absolute, on newer tables, it's relative. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=700326 Signed-off-by: Alex Deucher Reviewed-by: Jerome Glisse Cc: stable@kernel.org Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/radeon_atombios.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c index dd881d035f09..90dfb2b8cf03 100644 --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -1574,9 +1574,17 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct ATOM_FAKE_EDID_PATCH_RECORD *fake_edid_record; ATOM_PANEL_RESOLUTION_PATCH_RECORD *panel_res_record; bool bad_record = false; - u8 *record = (u8 *)(mode_info->atom_context->bios + - data_offset + - le16_to_cpu(lvds_info->info.usModePatchTableOffset)); + u8 *record; + + if ((frev == 1) && (crev < 2)) + /* absolute */ + record = (u8 *)(mode_info->atom_context->bios + + le16_to_cpu(lvds_info->info.usModePatchTableOffset)); + else + /* relative */ + record = (u8 *)(mode_info->atom_context->bios + + data_offset + + le16_to_cpu(lvds_info->info.usModePatchTableOffset)); while (*record != ATOM_RECORD_END_TYPE) { switch (*record) { case LCD_MODE_PATCH_RECORD_MODE_TYPE: -- 2.20.1