drm/i915/guc: Simplify programming of GUC_SHIM_CONTROL

We can program GUC_SHIM_CONTROL register with all expected
bits without use of extra macro defined in fwif.h

v2: rebased without pre-prod code
v3: fixed typo

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171103151816.62048-4-michal.wajdeczko@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_guc_reg.h

@@ -102,13 +102,6 @@
 #define   GUC_ENABLE_MIA_CLOCK_GATING		(1<<15)
 #define   GUC_GEN10_SHIM_WC_ENABLE		(1<<21)
 
-#define GUC_SHIM_CONTROL_VALUE	(GUC_DISABLE_SRAM_INIT_TO_ZEROES	| \
-				 GUC_ENABLE_READ_CACHE_LOGIC		| \
-				 GUC_ENABLE_MIA_CACHING			| \
-				 GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA	| \
-				 GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA	| \
-				 GUC_ENABLE_MIA_CLOCK_GATING)
-
 #define GUC_SEND_INTERRUPT		_MMIO(0xc4c8)
 #define   GUC_SEND_TRIGGER		  (1<<0)
 

drivers/gpu/drm/i915/intel_guc_fw.c

@@ -101,8 +101,13 @@ static void guc_prepare_xfer(struct intel_guc *guc)
 {
 	struct drm_i915_private *dev_priv = guc_to_i915(guc);
 
-	/* Enable MIA caching. GuC clock gating is disabled. */
-	I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
+	/* Must program this register before loading the ucode with DMA */
+	I915_WRITE(GUC_SHIM_CONTROL, GUC_DISABLE_SRAM_INIT_TO_ZEROES |
+				     GUC_ENABLE_READ_CACHE_LOGIC |
+				     GUC_ENABLE_MIA_CACHING |
+				     GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA |
+				     GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA |
+				     GUC_ENABLE_MIA_CLOCK_GATING);
 
 	if (IS_GEN9_LP(dev_priv))
 		I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);