Check ulBootUpMemoryClock on AMD IGPs.
Fix regression noticed by Torsten Kaiser <just.for.lkml at googlemail.com>
Signed-off-by: Alex Deucher <alexdeucher at gmail.com>
Cc: stable at kernel.org
---
drivers/gpu/drm/radeon/radeon_atombios.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c
b/drivers/gpu/drm/radeon/radeon_atombios.c
index 5dd86b9..3f89c9b 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1029,8 +1029,15 @@ bool radeon_atombios_sideport_present(struct
radeon_device *rdev)
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)
--
1.7.0.1
