diff --git a/src/freedreno/common/freedreno_dev_info.h b/src/freedreno/common/freedreno_dev_info.h
index 35e17af644a..3862d242b94 100644
--- a/src/freedreno/common/freedreno_dev_info.h
+++ b/src/freedreno/common/freedreno_dev_info.h
@@ -185,6 +185,8 @@ struct fd_dev_info {
          uint32_t RB_UNKNOWN_8E01;
          uint32_t VPC_DBG_ECO_CNTL;
          uint32_t UCHE_UNKNOWN_0E12;
+
+         uint32_t RB_UNKNOWN_8E06;
       } magic;
 
       struct {
diff --git a/src/freedreno/common/freedreno_devices.py b/src/freedreno/common/freedreno_devices.py
index babec02142d..6f5f65a9c89 100644
--- a/src/freedreno/common/freedreno_devices.py
+++ b/src/freedreno/common/freedreno_devices.py
@@ -800,7 +800,9 @@ a730_magic_regs = dict(
         RB_DBG_ECO_CNTL_blit = 0x00000000,  # is it even needed?
         RB_UNKNOWN_8E01 = 0x0,
         VPC_DBG_ECO_CNTL = 0x02000000,
-        UCHE_UNKNOWN_0E12 = 0x3200000
+        UCHE_UNKNOWN_0E12 = 0x3200000,
+
+        RB_UNKNOWN_8E06 = 0x02080000,
     )
 
 a730_raw_magic_regs = [
@@ -893,7 +895,9 @@ add_gpus([
             # HLSQ_DBG_ECO_CNTL = 0x0,
             RB_UNKNOWN_8E01 = 0x0,
             VPC_DBG_ECO_CNTL = 0x02000000,
-            UCHE_UNKNOWN_0E12 = 0x00000000
+            UCHE_UNKNOWN_0E12 = 0x00000000,
+
+            RB_UNKNOWN_8E06 = 0x02080000,
         ),
         raw_magic_regs = [
             [A6XXRegs.REG_A6XX_UCHE_CACHE_WAYS, 0x00040004],
diff --git a/src/freedreno/vulkan/tu_clear_blit.cc b/src/freedreno/vulkan/tu_clear_blit.cc
index d0599da659b..c4336820816 100644
--- a/src/freedreno/vulkan/tu_clear_blit.cc
+++ b/src/freedreno/vulkan/tu_clear_blit.cc
@@ -1451,7 +1451,8 @@ r3d_setup(struct tu_cmd_buffer *cmd,
       if (CHIP >= A7XX) {
          tu_cs_emit_regs(cs, A7XX_RB_UNKNOWN_8812(0x3ff));
          tu_cs_emit_regs(cs, A7XX_RB_UNKNOWN_88E5(0x50120004));
-         tu_cs_emit_regs(cs, A7XX_RB_UNKNOWN_8E06(0x2080000));
+         tu_cs_emit_regs(cs,
+            A7XX_RB_UNKNOWN_8E06(cmd->device->physical_device->info->a6xx.magic.RB_UNKNOWN_8E06));
       }
    }
 
diff --git a/src/freedreno/vulkan/tu_cmd_buffer.cc b/src/freedreno/vulkan/tu_cmd_buffer.cc
index 091c8cd29d7..586753a988b 100644
--- a/src/freedreno/vulkan/tu_cmd_buffer.cc
+++ b/src/freedreno/vulkan/tu_cmd_buffer.cc
@@ -1652,7 +1652,7 @@ tu6_sysmem_render_begin(struct tu_cmd_buffer *cmd, struct tu_cs *cs,
       tu_cs_emit_regs(cs,
                    A7XX_RB_UNKNOWN_88E5(0x50120004));
       tu_cs_emit_regs(cs,
-                   A7XX_RB_UNKNOWN_8E06(0x2080000));
+         A7XX_RB_UNKNOWN_8E06(cmd->device->physical_device->info->a6xx.magic.RB_UNKNOWN_8E06));
 
       /* These three have something to do with lrz/depth */
       tu_cs_emit_regs(cs, A7XX_GRAS_UNKNOWN_8007(0x0));