5 files changed, 25 insertions, 11 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index c681dc149d2a..b9da8900ae4e 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -756,9 +756,9 @@ intel_enable_semaphores(struct drm_device *dev)
         if (i915_semaphores >= 0)
                 return i915_semaphores;
 
-        /* Enable semaphores on SNB when IO remapping is off */
+        /* Disable semaphores on SNB */
         if (INTEL_INFO(dev)->gen == 6)
-                return !intel_iommu_enabled;
+                return 0;
 
         return 1;
 }
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d809b038ca88..daa5743ccbd6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7922,13 +7922,11 @@ static bool intel_enable_rc6(struct drm_device *dev)
                 return 0;
 
         /*
-         * Enable rc6 on Sandybridge if DMA remapping is disabled
+         * Disable rc6 on Sandybridge
          */
         if (INTEL_INFO(dev)->gen == 6) {
-                DRM_DEBUG_DRIVER("Sandybridge: intel_iommu_enabled %s -- RC6 %sabled\n",
-                                 intel_iommu_enabled ? "true" : "false",
-                                 !intel_iommu_enabled ? "en" : "dis");
-                return !intel_iommu_enabled;
+                DRM_DEBUG_DRIVER("Sandybridge: RC6 disabled\n");
+                return 0;
         }
         DRM_DEBUG_DRIVER("RC6 enabled\n");
         return 1;
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 5e00d1670aa9..92c9628c572d 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -3276,6 +3276,18 @@ int evergreen_init(struct radeon_device *rdev)
                         rdev->accel_working = false;
                 }
         }
+
+        /* Don't start up if the MC ucode is missing on BTC parts.
+         * The default clocks and voltages before the MC ucode
+         * is loaded are not suffient for advanced operations.
+         */
+        if (ASIC_IS_DCE5(rdev)) {
+                if (!rdev->mc_fw && !(rdev->flags & RADEON_IS_IGP)) {
+                        DRM_ERROR("radeon: MC ucode required for NI+.\n");
+                        return -EINVAL;
+                }
+        }
+
         return 0;
 }
 
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index d24baf30efcb..5082d17d14dc 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -2560,7 +2560,11 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 
         rdev->pm.current_power_state_index = rdev->pm.default_power_state_index;
         rdev->pm.current_clock_mode_index = 0;
-        rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
+        if (rdev->pm.default_power_state_index >= 0)
+                rdev->pm.current_vddc =
+                        rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage;
+        else
+                rdev->pm.current_vddc = 0;
 }
 
 void radeon_atom_set_clock_gating(struct radeon_device *rdev, int enable)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 8aa1dbb45c67..f94b33ae2215 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1093,7 +1093,6 @@ static struct drm_framebuffer *vmw_kms_fb_create(struct drm_device *dev,
         struct vmw_surface *surface = NULL;
         struct vmw_dma_buffer *bo = NULL;
         struct ttm_base_object *user_obj;
-        u64 required_size;
         int ret;
 
         /**
@@ -1102,8 +1101,9 @@ static struct drm_framebuffer *vmw_kms_fb_create(struct drm_device *dev,
          * requested framebuffer.
          */
 
-        required_size = mode_cmd->pitch * mode_cmd->height;
-        if (unlikely(required_size > (u64) dev_priv->vram_size)) {
+        if (!vmw_kms_validate_mode_vram(dev_priv,
+                                        mode_cmd->pitch,
+                                        mode_cmd->height)) {
                 DRM_ERROR("VRAM size is too small for requested mode.\n");
                 return ERR_PTR(-ENOMEM);
         }