drm/i915/csr: use intel_de_*() functions for register access

The implicit "dev_priv" local variable use has been a long-standing pain
point in the register access macros I915_READ(), I915_WRITE(),
POSTING_READ(), I915_READ_FW(), and I915_WRITE_FW().

Replace them with the corresponding new display engine register
accessors intel_de_read(), intel_de_write(), intel_de_posting_read(),
intel_de_read_fw(), and intel_de_write_fw().

No functional changes.

Generated using the following semantic patch:

@@
expression REG, OFFSET;
@@
- I915_READ(REG)
+ intel_de_read(dev_priv, REG)

@@
expression REG, OFFSET;
@@
- POSTING_READ(REG)
+ intel_de_posting_read(dev_priv, REG)

@@
expression REG, OFFSET;
@@
- I915_WRITE(REG, OFFSET)
+ intel_de_write(dev_priv, REG, OFFSET)

@@
expression REG;
@@
- I915_READ_FW(REG)
+ intel_de_read_fw(dev_priv, REG)

@@
expression REG, OFFSET;
@@
- I915_WRITE_FW(REG, OFFSET)
+ intel_de_write_fw(dev_priv, REG, OFFSET)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200214140910.23194-1-jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_csr.c

@@ -27,6 +27,7 @@
 #include "i915_drv.h"
 #include "i915_reg.h"
 #include "intel_csr.h"
+#include "intel_de.h"
 
 /**
  * DOC: csr support for dmc
@@ -276,11 +277,11 @@ static void gen9_set_dc_state_debugmask(struct drm_i915_private *dev_priv)
 		mask |= DC_STATE_DEBUG_MASK_CORES;
 
 	/* The below bit doesn't need to be cleared ever afterwards */
-	val = I915_READ(DC_STATE_DEBUG);
+	val = intel_de_read(dev_priv, DC_STATE_DEBUG);
 	if ((val & mask) != mask) {
 		val |= mask;
-		I915_WRITE(DC_STATE_DEBUG, val);
-		POSTING_READ(DC_STATE_DEBUG);
+		intel_de_write(dev_priv, DC_STATE_DEBUG, val);
+		intel_de_posting_read(dev_priv, DC_STATE_DEBUG);
 	}
 }
 
@@ -321,7 +322,7 @@ void intel_csr_load_program(struct drm_i915_private *dev_priv)
 	preempt_enable();
 
 	for (i = 0; i < dev_priv->csr.mmio_count; i++) {
-		I915_WRITE(dev_priv->csr.mmioaddr[i],
+		intel_de_write(dev_priv, dev_priv->csr.mmioaddr[i],
 			       dev_priv->csr.mmiodata[i]);
 	}