From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 7 Oct 2016 18:48:18 +0000 (-0400)
Subject: drm/amdgpu: clarify UVD/VCE special handling for CG
X-Git-Tag: v4.9-rc2~40^2~1^2~13
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4a446d55843fb82fc5bc6c72d27bfc20b6c294c3;p=platform%2Fkernel%2Flinux-amlogic.git

drm/amdgpu: clarify UVD/VCE special handling for CG

UVD and VCE CG are handled specially, however the previous
fix for this skipped late init for those blocks rather than
just CG.  Just protect the CG function call.  No functional
change since UVD and VCE don't currently utilize a late_init
function.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 928774f..15afe22 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1408,9 +1408,6 @@ static int amdgpu_late_init(struct amdgpu_device *adev)
 	for (i = 0; i < adev->num_ip_blocks; i++) {
 		if (!adev->ip_block_status[i].valid)
 			continue;
-		if (adev->ip_blocks[i].type == AMD_IP_BLOCK_TYPE_UVD ||
-			adev->ip_blocks[i].type == AMD_IP_BLOCK_TYPE_VCE)
-			continue;
 		if (adev->ip_blocks[i].funcs->late_init) {
 			r = adev->ip_blocks[i].funcs->late_init((void *)adev);
 			if (r) {
@@ -1419,12 +1416,17 @@ static int amdgpu_late_init(struct amdgpu_device *adev)
 			}
 			adev->ip_block_status[i].late_initialized = true;
 		}
-		/* enable clockgating to save power */
-		r = adev->ip_blocks[i].funcs->set_clockgating_state((void *)adev,
-								    AMD_CG_STATE_GATE);
-		if (r) {
-			DRM_ERROR("set_clockgating_state(gate) of IP block <%s> failed %d\n", adev->ip_blocks[i].funcs->name, r);
-			return r;
+		/* skip CG for VCE/UVD, it's handled specially */
+		if (adev->ip_blocks[i].type != AMD_IP_BLOCK_TYPE_UVD &&
+		    adev->ip_blocks[i].type != AMD_IP_BLOCK_TYPE_VCE) {
+			/* enable clockgating to save power */
+			r = adev->ip_blocks[i].funcs->set_clockgating_state((void *)adev,
+									    AMD_CG_STATE_GATE);
+			if (r) {
+				DRM_ERROR("set_clockgating_state(gate) of IP block <%s> failed %d\n",
+					  adev->ip_blocks[i].funcs->name, r);
+				return r;
+			}
 		}
 	}