drm/radeon: allow TA_CS_BC_BASE_ADDR on SI

Required for border colors in compute shaders.
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_drv.c

@@ -96,9 +96,10 @@
  *   2.45.0 - Allow setting shader registers using DMA/COPY packet3 on SI
  *   2.46.0 - Add PFP_SYNC_ME support on evergreen
  *   2.47.0 - Add UVD_NO_OP register support
+ *   2.48.0 - TA_CS_BC_BASE_ADDR allowed on SI
  */
 #define KMS_DRIVER_MAJOR	2
-#define KMS_DRIVER_MINOR	47
+#define KMS_DRIVER_MINOR	48
 #define KMS_DRIVER_PATCHLEVEL	0
 int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags);
 int radeon_driver_unload_kms(struct drm_device *dev);

drivers/gpu/drm/radeon/si.c

@@ -4431,6 +4431,7 @@ static bool si_vm_reg_valid(u32 reg)
 	case SPI_CONFIG_CNTL:
 	case SPI_CONFIG_CNTL_1:
 	case TA_CNTL_AUX:
+	case TA_CS_BC_BASE_ADDR:
 		return true;
 	default:
 		DRM_ERROR("Invalid register 0x%x in CS\n", reg);

drivers/gpu/drm/radeon/sid.h

@@ -1145,6 +1145,7 @@
 #define	SPI_LB_CU_MASK					0x9354
 
 #define	TA_CNTL_AUX					0x9508
+#define	TA_CS_BC_BASE_ADDR				0x950C
 
 #define CC_RB_BACKEND_DISABLE				0x98F4
 #define		BACKEND_DISABLE(x)     			((x) << 16)