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Commit 05fa7ea7 authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

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: default avatarAlex Deucher <alexdeucher@gmail.com>
Reviewed-by: default avatarJerome Glisse <jglisse@redhat.com>
Cc: stable@kernel.org
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent d9282fca

drivers/gpu/drm/radeon/radeon_atombios.c

+11 −3
Original line number Diff line number Diff line
@@ -1574,7 +1574,15 @@ 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 +

			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) {