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drm/i915/guc: limit forcewake to blitter domain in guc_send 

The forcewake_get call in the guc_send_mmio function was added to
avoid getting and releasing forcewake on each register access.
While this makes sense, all GuC registers are in the blitter range
so no need to wake all the wells.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1490366919-34715-1-git-send-email-daniele.ceraolospurio@intel.com
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Daniele Ceraolo Spurio 2017-03-24 07:48:39 -07:00 committed by Chris Wilson
parent bd00e73ede
commit 5d64c120c0
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/intel_uc.c
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@ -245,7 +245,7 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len)
return -EINVAL;
mutex_lock(&guc->send_mutex);
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_BLITTER);
dev_priv->guc.action_count += 1;
dev_priv->guc.action_cmd = action[0];
@ -283,7 +283,7 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len)
}
dev_priv->guc.action_status = status;
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_BLITTER);
mutex_unlock(&guc->send_mutex);
return ret;