drm/radeon: don't reset the MC on IGPs/APUs

The MC isn't part of the GPU per se.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 12 insertions, 6 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 045955d5f337..2916de896a60 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -2500,8 +2500,10 @@ static void evergreen_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask)
         if (reset_mask & RADEON_RESET_VMC)
                 srbm_soft_reset |= SOFT_RESET_VMC;
 
-        if (reset_mask & RADEON_RESET_MC)
-                srbm_soft_reset |= SOFT_RESET_MC;
+        if (!(rdev->flags & RADEON_IS_IGP)) {
+                if (reset_mask & RADEON_RESET_MC)
+                        srbm_soft_reset |= SOFT_RESET_MC;
+        }
 
         if (grbm_soft_reset) {
                 tmp = RREG32(GRBM_SOFT_RESET);
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index b6e80550ed90..170bd03d4dd8 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -1474,8 +1474,10 @@ static void cayman_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask)
         if (reset_mask & RADEON_RESET_VMC)
                 srbm_soft_reset |= SOFT_RESET_VMC;
 
-        if (reset_mask & RADEON_RESET_MC)
-                srbm_soft_reset |= SOFT_RESET_MC;
+        if (!(rdev->flags & RADEON_IS_IGP)) {
+                if (reset_mask & RADEON_RESET_MC)
+                        srbm_soft_reset |= SOFT_RESET_MC;
+        }
 
         if (grbm_soft_reset) {
                 tmp = RREG32(GRBM_SOFT_RESET);
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 3f292765aea8..dbcb0752f083 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1475,8 +1475,10 @@ static void r600_gpu_soft_reset(struct radeon_device *rdev, u32 reset_mask)
         if (reset_mask & RADEON_RESET_GRBM)
                 srbm_soft_reset |= S_000E60_SOFT_RESET_GRBM(1);
 
-        if (reset_mask & RADEON_RESET_MC)
-                srbm_soft_reset |= S_000E60_SOFT_RESET_MC(1);
+        if (!(rdev->flags & RADEON_IS_IGP)) {
+                if (reset_mask & RADEON_RESET_MC)
+                        srbm_soft_reset |= S_000E60_SOFT_RESET_MC(1);
+        }
 
         if (reset_mask & RADEON_RESET_VMC)
                 srbm_soft_reset |= S_000E60_SOFT_RESET_VMC(1);