diff --git a/src/freedreno/registers/a6xx.xml b/src/freedreno/registers/a6xx.xml
index 04f632ebea0..1fdc21e9839 100644
--- a/src/freedreno/registers/a6xx.xml
+++ b/src/freedreno/registers/a6xx.xml
@@ -1821,9 +1821,14 @@ to upconvert to 32b float internally?
 	<!-- always 0x03200000 ? -->
 	<reg32 offset="0x0e12" name="UCHE_UNKNOWN_0E12"/>
 
-	<reg32 offset="0x8000" name="GRAS_DISABLE_CNTL">
-		 <!-- likely something clip-disable related -->
-		<bitfield name="UNK0" pos="0" type="boolean"/>
+	<reg32 offset="0x8000" name="GRAS_CL_CNTL">
+		<bitfield name="CLIP_DISABLE" pos="0" type="boolean"/>
+		<bitfield name="ZNEAR_CLIP_DISABLE" pos="1" type="boolean"/>
+		<bitfield name="ZFAR_CLIP_DISABLE" pos="2" type="boolean"/>
+		<!-- set with depthClampEnable, not clear what it does -->
+		<bitfield name="UNK5" pos="5" type="boolean"/>
+		<!-- controls near z clip behavior (set for vulkan) -->
+		<bitfield name="ZERO_GB_SCALE_Z" pos="6" type="boolean"/>
 		<!-- guess based on a3xx and meaning of bits 8 and 9
 		     if the guess is right then this is related to point sprite clipping -->
 		<bitfield name="VP_CLIP_CODE_IGNORE" pos="7" type="boolean"/>
@@ -1876,6 +1881,10 @@ to upconvert to 32b float internally?
 	<reg32 offset="0x8014" name="GRAS_CL_VPORT_ZOFFSET_0" type="float"/>
 	<reg32 offset="0x8015" name="GRAS_CL_VPORT_ZSCALE_0" type="float"/>
 
+	<!-- not clear what it does, mirrors RB_Z_CLAMP_MIN -->
+	<reg32 offset="0x8070" name="GRAS_CL_Z_CLAMP_MIN" type="float"/>
+	<reg32 offset="0x8071" name="GRAS_CL_Z_CLAMP_MAX" type="float"/>
+
 	<reg32 offset="0x8090" name="GRAS_SU_CNTL">
 		<bitfield name="CULL_FRONT" pos="0" type="boolean"/>
 		<bitfield name="CULL_BACK" pos="1" type="boolean"/>
@@ -2209,6 +2218,7 @@ to upconvert to 32b float internally?
 		<bitfield name="Z_ENABLE" pos="0" type="boolean"/>
 		<bitfield name="Z_WRITE_ENABLE" pos="1" type="boolean"/>
 		<bitfield name="ZFUNC" low="2" high="4" type="adreno_compare_func"/>
+		<bitfield name="Z_CLAMP_ENABLE" pos="5" type="boolean"/>
 		<doc>Z_TEST_ENABLE bit is set for zfunc other than GL_ALWAYS or GL_NEVER</doc>
 		<bitfield name="Z_TEST_ENABLE" pos="6" type="boolean"/>
 	</reg32>
@@ -2286,6 +2296,10 @@ to upconvert to 32b float internally?
 		<bitfield name="ENABLE" pos="0" type="boolean"/>
 	</reg32>
 
+	<!-- clamps depth value for depth test/write -->
+	<reg32 offset="0x88c0" name="RB_Z_CLAMP_MIN" type="float"/>
+	<reg32 offset="0x88c1" name="RB_Z_CLAMP_MAX" type="float"/>
+
 	<reg32 offset="0x88d0" name="RB_UNKNOWN_88D0"/>
 	<reg32 offset="0x88d1" name="RB_BLIT_SCISSOR_TL" type="adreno_reg_xy"/>
 	<reg32 offset="0x88d2" name="RB_BLIT_SCISSOR_BR" type="adreno_reg_xy"/>
diff --git a/src/freedreno/vulkan/tu_pipeline.c b/src/freedreno/vulkan/tu_pipeline.c
index c739ad98e47..3d25428fe82 100644
--- a/src/freedreno/vulkan/tu_pipeline.c
+++ b/src/freedreno/vulkan/tu_pipeline.c
@@ -1342,8 +1342,8 @@ tu6_emit_scissor(struct tu_cs *cs, const VkRect2D *scissor)
 static void
 tu6_emit_gras_unknowns(struct tu_cs *cs)
 {
-   tu_cs_emit_pkt4(cs, REG_A6XX_GRAS_DISABLE_CNTL, 1);
-   tu_cs_emit(cs, A6XX_GRAS_DISABLE_CNTL_VP_CLIP_CODE_IGNORE);
+   tu_cs_emit_pkt4(cs, REG_A6XX_GRAS_CL_CNTL, 1);
+   tu_cs_emit(cs, A6XX_GRAS_CL_CNTL_VP_CLIP_CODE_IGNORE);
    tu_cs_emit_pkt4(cs, REG_A6XX_GRAS_UNKNOWN_8001, 1);
    tu_cs_emit(cs, 0x0);
    tu_cs_emit_pkt4(cs, REG_A6XX_GRAS_LAYER_CNTL, 1);
diff --git a/src/gallium/drivers/freedreno/a6xx/fd6_rasterizer.c b/src/gallium/drivers/freedreno/a6xx/fd6_rasterizer.c
index db0c249d83e..2225ea0b2eb 100644
--- a/src/gallium/drivers/freedreno/a6xx/fd6_rasterizer.c
+++ b/src/gallium/drivers/freedreno/a6xx/fd6_rasterizer.c
@@ -52,7 +52,7 @@ __fd6_setup_rasterizer_stateobj(struct fd_context *ctx,
 	}
 
 	OUT_REG(ring,
-		A6XX_GRAS_DISABLE_CNTL(.vp_clip_code_ignore = 1),
+		A6XX_GRAS_CL_CNTL(.vp_clip_code_ignore = 1),
 		A6XX_GRAS_UNKNOWN_8001());
 
 	OUT_REG(ring,