[PATCH v3 14/15] drm/i915: Taking forcewake during GuC load.

yu.dai
2015-04-17T21:23:30Z

From: Sagar Kamble <sagar.a.kamble@intel.com>

The firmware loader will use GuC DMA engine to move data from
ggtt to WOPCM. Need to take forcewake before GuC loading.

Issue: VIZ-4884
Change-Id: Ie422fc1e122933b161ff63cab23622197e6bba54
Signed-off-by: Sagar Kamble <sagar.a.kamble@intel.com>
---
drivers/gpu/drm/i915/intel_guc_loader.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
index d1fd11e..f19eb90 100644
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -340,6 +340,7 @@ static int guc_load_ucode(struct drm_device *dev)
int ret;

WARN_ON(!mutex_is_locked(&dev->struct_mutex));
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);

ret = i915_gem_obj_ggtt_pin(guc_fw->uc_fw_obj, 0, 0);
if (ret)
@@ -388,6 +389,8 @@ out:
if (pinned)
i915_gem_object_ggtt_unpin(guc_fw->uc_fw_obj);

+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+
return ret;
}

--
1.9.1