drm/radeon/kms: fix possible mis-detection of sideport on rs690/rs740
Check ulBootUpMemoryClock on AMD IGPs.
Fix regression noticed by Torsten Kaiser <just.for.lkml@googlemail.com>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 99bd8a9..125155a 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1029,8 +1029,15 @@
data_offset);
switch (crev) {
case 1:
- if (igp_info->info.ucMemoryType & 0xf0)
- return true;
+ /* AMD IGPS */
+ if ((rdev->family == CHIP_RS690) ||
+ (rdev->family == CHIP_RS740)) {
+ if (igp_info->info.ulBootUpMemoryClock)
+ return true;
+ } else {
+ if (igp_info->info.ucMemoryType & 0xf0)
+ return true;
+ }
break;
case 2:
if (igp_info->info_2.ucMemoryType & 0x0f)