drm/radeon/kms: don't fail if we fail to init GPU acceleration

Userspace can query if acceleration is working or not true get
info ioctl and could fallback to software if for some reason
kernel failed to initialize KMS. This should allow to give a
working KMS setup in all case (even with non functionning accel).

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 18 insertions, 26 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index db5ae73d6289..0b5014c2ae7f 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -504,6 +504,7 @@ int radeon_device_init(struct radeon_device *rdev,
 	rdev->usec_timeout = RADEON_MAX_USEC_TIMEOUT;
 	rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
 	rdev->gpu_lockup = false;
+	rdev->accel_working = false;
 	/* mutex initialization are all done here so we
 	 * can recall function without having locking issues */
 	mutex_init(&rdev->cs_mutex);
@@ -649,35 +650,26 @@ int radeon_device_init(struct radeon_device *rdev,
 		/* Initialize GART (initialize after TTM so we can allocate
 		 * memory through TTM but finalize after TTM) */
 		r = radeon_gart_enable(rdev);
-		if (!r) {
+		if (r)
+			return 0;
 			r = radeon_gem_init(rdev);
-		}
+		if (r)
+			return 0;
 
 		/* 1M ring buffer */
-		if (!r) {
-			r = radeon_cp_init(rdev, 1024 * 1024);
-		}
-		if (!r) {
-			r = radeon_wb_init(rdev);
-			if (r) {
-				DRM_ERROR("radeon: failled initializing WB (%d).\n", r);
-				return r;
-			}
-		}
-		if (!r) {
-			r = radeon_ib_pool_init(rdev);
-			if (r) {
-				DRM_ERROR("radeon: failled initializing IB pool (%d).\n", r);
-				return r;
-			}
-		}
-		if (!r) {
-			r = radeon_ib_test(rdev);
-			if (r) {
-				DRM_ERROR("radeon: failled testing IB (%d).\n", r);
-				return r;
-			}
-		}
+		r = radeon_cp_init(rdev, 1024 * 1024);
+		if (r)
+			return 0;
+		r = radeon_wb_init(rdev);
+		if (r)
+			DRM_ERROR("radeon: failled initializing WB (%d).\n", r);
+		r = radeon_ib_pool_init(rdev);
+		if (r)
+			return 0;
+		r = radeon_ib_test(rdev);
+		if (r)
+			return 0;
+		rdev->accel_working = true;
 	}
 	DRM_INFO("radeon: kernel modesetting successfully initialized.\n");
 	if (radeon_testing) {