drm/amdgpu: add sdma instance check for gfx11 CGCG

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 <[e-mail]>
Reviewed-by: Yifan Zhang <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c

···
 		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);
···
 		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);
+		}
 	}
 }