drm/amd/amdgpu: Remove division from vblank_wait

Removes division from vblank_wait for DCE v6, v8,
and v10.  Was already implemented for v11.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 15 insertions, 9 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
index db6e6c3eaae2..9a63d7766604 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
@@ -221,7 +221,7 @@ static bool dce_v10_0_is_counter_moving(struct amdgpu_device *adev, int crtc)
  */
 static void dce_v10_0_vblank_wait(struct amdgpu_device *adev, int crtc)
 {
-        unsigned i = 0;
+        unsigned i = 100;
 
         if (crtc >= adev->mode_info.num_crtc)
                 return;
@@ -233,14 +233,16 @@ static void dce_v10_0_vblank_wait(struct amdgpu_device *adev, int crtc)
          * wait for another frame.
          */
         while (dce_v10_0_is_in_vblank(adev, crtc)) {
-                if (i++ % 100 == 0) {
+                if (i++ == 100) {
+                        i = 0;
                         if (!dce_v10_0_is_counter_moving(adev, crtc))
                                 break;
                 }
         }
 
         while (!dce_v10_0_is_in_vblank(adev, crtc)) {
-                if (i++ % 100 == 0) {
+                if (i++ == 100) {
+                        i = 0;
                         if (!dce_v10_0_is_counter_moving(adev, crtc))
                                 break;
                 }
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index c8380f030400..c866185fd091 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -146,7 +146,7 @@ static bool dce_v6_0_is_counter_moving(struct amdgpu_device *adev, int crtc)
  */
 static void dce_v6_0_vblank_wait(struct amdgpu_device *adev, int crtc)
 {
-        unsigned i = 0;
+        unsigned i = 100;
 
         if (crtc >= adev->mode_info.num_crtc)
                 return;
@@ -158,14 +158,16 @@ static void dce_v6_0_vblank_wait(struct amdgpu_device *adev, int crtc)
          * wait for another frame.
          */
         while (dce_v6_0_is_in_vblank(adev, crtc)) {
-                if (i++ % 100 == 0) {
+                if (i++ == 100) {
+                        i = 0;
                         if (!dce_v6_0_is_counter_moving(adev, crtc))
                                 break;
                 }
         }
 
         while (!dce_v6_0_is_in_vblank(adev, crtc)) {
-                if (i++ % 100 == 0) {
+                if (i++ == 100) {
+                        i = 0;
                         if (!dce_v6_0_is_counter_moving(adev, crtc))
                                 break;
                 }
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
index 845a30b03cb4..3e1e3d0a850e 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
@@ -170,7 +170,7 @@ static bool dce_v8_0_is_counter_moving(struct amdgpu_device *adev, int crtc)
  */
 static void dce_v8_0_vblank_wait(struct amdgpu_device *adev, int crtc)
 {
-        unsigned i = 0;
+        unsigned i = 100;
 
         if (crtc >= adev->mode_info.num_crtc)
                 return;
@@ -182,14 +182,16 @@ static void dce_v8_0_vblank_wait(struct amdgpu_device *adev, int crtc)
          * wait for another frame.
          */
         while (dce_v8_0_is_in_vblank(adev, crtc)) {
-                if (i++ % 100 == 0) {
+                if (i++ == 100) {
+                        i = 0;
                         if (!dce_v8_0_is_counter_moving(adev, crtc))
                                 break;
                 }
         }
 
         while (!dce_v8_0_is_in_vblank(adev, crtc)) {
-                if (i++ % 100 == 0) {
+                if (i++ == 100) {
+                        i = 0;
                         if (!dce_v8_0_is_counter_moving(adev, crtc))
                                 break;
                 }