linux-kernel - [PATCH AUTOSEL 5.19 32/33] drm/amdgpu: add sdma instance check for gfx11 CGCG

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Date:   Tue, 30 Aug 2022 13:18:23 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Tim Huang <tim.huang@....com>, Yifan Zhang <yifan1.zhang@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...ux.ie, daniel@...ll.ch,
        Hawking.Zhang@....com, ray.huang@....com, Jack.Xiao@....com,
        Joseph.Greathouse@....com, Likun.Gao@....com, evan.quan@....com,
        dan.carpenter@...cle.com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.19 32/33] drm/amdgpu: add sdma instance check for gfx11 CGCG

From: Tim Huang <tim.huang@....com>

[ Upstream commit 00047c3d967d7ef8adf8bac3c3579294a3bc0bb1 ]

For some ASICs, like GFX IP v11.0.1, only have one SDMA instance,
so not need to configure SDMA1_RLC_CGCG_CTRL for this case.

Signed-off-by: Tim Huang <tim.huang@....com>
Reviewed-by: Yifan Zhang <yifan1.zhang@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index a4a6751b1e449..30998ac47707c 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -5090,9 +5090,12 @@ static void gfx_v11_0_update_coarse_grain_clock_gating(struct amdgpu_device *ade
 		data = REG_SET_FIELD(data, SDMA0_RLC_CGCG_CTRL, CGCG_INT_ENABLE, 1);
 		WREG32_SOC15(GC, 0, regSDMA0_RLC_CGCG_CTRL, data);
 
-		data = RREG32_SOC15(GC, 0, regSDMA1_RLC_CGCG_CTRL);
-		data = REG_SET_FIELD(data, SDMA1_RLC_CGCG_CTRL, CGCG_INT_ENABLE, 1);
-		WREG32_SOC15(GC, 0, regSDMA1_RLC_CGCG_CTRL, data);
+		/* Some ASICs only have one SDMA instance, not need to configure SDMA1 */
+		if (adev->sdma.num_instances > 1) {
+			data = RREG32_SOC15(GC, 0, regSDMA1_RLC_CGCG_CTRL);
+			data = REG_SET_FIELD(data, SDMA1_RLC_CGCG_CTRL, CGCG_INT_ENABLE, 1);
+			WREG32_SOC15(GC, 0, regSDMA1_RLC_CGCG_CTRL, data);
+		}
 	} else {
 		/* Program RLC_CGCG_CGLS_CTRL */
 		def = data = RREG32_SOC15(GC, 0, regRLC_CGCG_CGLS_CTRL);
@@ -5121,9 +5124,12 @@ static void gfx_v11_0_update_coarse_grain_clock_gating(struct amdgpu_device *ade
 		data &= ~SDMA0_RLC_CGCG_CTRL__CGCG_INT_ENABLE_MASK;
 		WREG32_SOC15(GC, 0, regSDMA0_RLC_CGCG_CTRL, data);
 
-		data = RREG32_SOC15(GC, 0, regSDMA1_RLC_CGCG_CTRL);
-		data &= ~SDMA1_RLC_CGCG_CTRL__CGCG_INT_ENABLE_MASK;
-		WREG32_SOC15(GC, 0, regSDMA1_RLC_CGCG_CTRL, data);
+		/* Some ASICs only have one SDMA instance, not need to configure SDMA1 */
+		if (adev->sdma.num_instances > 1) {
+			data = RREG32_SOC15(GC, 0, regSDMA1_RLC_CGCG_CTRL);
+			data &= ~SDMA1_RLC_CGCG_CTRL__CGCG_INT_ENABLE_MASK;
+			WREG32_SOC15(GC, 0, regSDMA1_RLC_CGCG_CTRL, data);
+		}
 	}
 }
 
-- 
2.35.1