drm/i915: Add GEN7_GPGPU_DISPATCHDIMX/Y/Z to the register whitelist

This is required to support glDispatchComputeIndirect for gen7.
Signed-off-by: NJordan Justen <jordan.l.justen@intel.com>
Reviewed-by: NKristian Høgsberg <krh@bitplanet.net>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_cmd_parser.c

@@ -448,6 +448,9 @@ static const struct drm_i915_reg_descriptor gen7_render_regs[] = {
 	REG32(GEN7_3DPRIM_INSTANCE_COUNT),
 	REG32(GEN7_3DPRIM_START_INSTANCE),
 	REG32(GEN7_3DPRIM_BASE_VERTEX),
+	REG32(GEN7_GPGPU_DISPATCHDIMX),
+	REG32(GEN7_GPGPU_DISPATCHDIMY),
+	REG32(GEN7_GPGPU_DISPATCHDIMZ),
 	REG64(GEN7_SO_NUM_PRIMS_WRITTEN(0)),
 	REG64(GEN7_SO_NUM_PRIMS_WRITTEN(1)),
 	REG64(GEN7_SO_NUM_PRIMS_WRITTEN(2)),
@@ -1214,6 +1217,7 @@ int i915_cmd_parser_get_version(void)
 	 *    MI_PREDICATE_SRC1 registers.
 	 * 3. Allow access to the GPGPU_THREADS_DISPATCHED register.
 	 * 4. L3 atomic chicken bits of HSW_SCRATCH1 and HSW_ROW_CHICKEN3.
+	 * 5. GPGPU dispatch compute indirect registers.
 	 */
-	return 4;
+	return 5;
 }

drivers/gpu/drm/i915/i915_reg.h

@@ -536,6 +536,10 @@
 #define GEN7_3DPRIM_START_INSTANCE      0x243C
 #define GEN7_3DPRIM_BASE_VERTEX         0x2440
 
+#define GEN7_GPGPU_DISPATCHDIMX         0x2500
+#define GEN7_GPGPU_DISPATCHDIMY         0x2504
+#define GEN7_GPGPU_DISPATCHDIMZ         0x2508
+
 #define OACONTROL 0x2360
 
 #define _GEN7_PIPEA_DE_LOAD_SL	0x70068