From: Tom St Denis <tom.stdenis@amd.com>
Date: Thu, 31 Aug 2017 09:01:11 -0400
Subject: drm/amd/amdgpu: Tidy up gfx_v9_0_enable_sck_slow_down_on_power_up()
Git-commit: e24c7f06db418c34c179233724656ec0efae6bc8
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c |   15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -1842,16 +1842,11 @@ static void gfx_v9_0_enable_sck_slow_dow
 	uint32_t default_data = 0;
 
 	default_data = data = RREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL));
-
-	if (enable == true) {
-		data |= RLC_PG_CNTL__SMU_CLK_SLOWDOWN_ON_PU_ENABLE_MASK;
-		if (default_data != data)
-			WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL), data);
-	} else {
-		data &= ~RLC_PG_CNTL__SMU_CLK_SLOWDOWN_ON_PU_ENABLE_MASK;
-		if(default_data != data)
-			WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL), data);
-	}
+	data = REG_SET_FIELD(data, RLC_PG_CNTL,
+			     SMU_CLK_SLOWDOWN_ON_PU_ENABLE,
+			     enable ? 1 : 0);
+	if (default_data != data)
+		WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_PG_CNTL), data);
 }
 
 static void gfx_v9_0_enable_sck_slow_down_on_power_down(struct amdgpu_device *adev,