[PATCH] drm/i915/gvt: set ring buffer size to default for guc submission

[Chuanxiao Dong]

When not using GuC submission, the ring buffer size for GVT context is
512KB which is the max size. When switching to GuC submission, the ring
buffer size is required to be less than 16KB. So use the GVT context
default ring buffer size if GuC submission is enabled.

Signed-off-by: Chuanxiao Dong <chuanxiao.dong at intel.com>
---
 drivers/gpu/drm/i915/i915_gem_context.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index c73bf02..26f0b65 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -431,7 +431,8 @@ i915_gem_context_create_gvt(struct drm_device *dev)
 	i915_gem_context_set_closed(ctx); /* not user accessible */
 	i915_gem_context_clear_bannable(ctx);
 	i915_gem_context_set_force_single_submission(ctx);
-	ctx->ring_size = 512 * PAGE_SIZE; /* Max ring buffer size */
+	if (!i915.enable_guc_submission)
+		ctx->ring_size = 512 * PAGE_SIZE; /* Max ring buffer size */
 
 	GEM_BUG_ON(i915_gem_context_is_kernel(ctx));
 out:
-- 
2.7.4