drm/amdgpu: correct IH_CHICKEN programming for aldebaran

For aldebaran, psp firmware won't program IH_CHICKEN.
it now depends on driver to program it properly so
either bus address or gpu virtual address is just
working for ih ring.
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Dennis Li <Dennis.Li@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/vega20_ih.c

@@ -35,6 +35,9 @@
 
 #define MAX_REARM_RETRY 10
 
+#define mmIH_CHICKEN_ALDEBARAN			0x18d
+#define mmIH_CHICKEN_ALDEBARAN_BASE_IDX		0
+
 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev);
 
 /**
@@ -316,6 +319,18 @@ static int vega20_ih_irq_init(struct amdgpu_device *adev)
 		WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
 	}
 
+	/* psp firmware won't program IH_CHICKEN for aldebaran
+	 * driver needs to program it properly according to
+	 * MC_SPACE type in IH_RB_CNTL */
+	if (adev->asic_type == CHIP_ALDEBARAN) {
+		ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN);
+		if (adev->irq.ih.use_bus_addr) {
+			ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
+						   MC_SPACE_GPA_ENABLE, 1);
+		}
+		WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN, ih_chicken);
+	}
+
 	for (i = 0; i < ARRAY_SIZE(ih); i++) {
 		if (ih[i]->ring_size) {
 			if (i == 1)