drm/i915: s/phys_base/dma_addr/

The address we read from the PTE is a dma address, not a physical
address. Rename the variable to say so.
Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>
Tested-by: Paz Zcharya <pazz@chromium.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240202224340.30647-11-ville.syrjala@linux.intel.com

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

@@ -61,6 +61,7 @@ initial_plane_vma(struct drm_i915_private *i915,
 	base = round_down(plane_config->base, I915_GTT_MIN_ALIGNMENT);
 	if (IS_DGFX(i915) || HAS_LMEMBAR_SMEM_STOLEN(i915)) {
 		gen8_pte_t __iomem *gte = to_gt(i915)->ggtt->gsm;
+		dma_addr_t dma_addr;
 		gen8_pte_t pte;
 
 		gte += base / I915_GTT_PAGE_SIZE;
@@ -72,7 +73,7 @@ initial_plane_vma(struct drm_i915_private *i915,
 			return NULL;
 		}
 
-		phys_base = pte & GEN12_GGTT_PTE_ADDR_MASK;
+		dma_addr = pte & GEN12_GGTT_PTE_ADDR_MASK;
 
 		if (IS_DGFX(i915))
 			mem = i915->mm.regions[INTEL_REGION_LMEM_0];
@@ -88,18 +89,18 @@ initial_plane_vma(struct drm_i915_private *i915,
 		 * On lmem we don't currently expect this to
 		 * ever be placed in the stolen portion.
 		 */
-		if (phys_base < mem->region.start || phys_base > mem->region.end) {
+		if (dma_addr < mem->region.start || dma_addr > mem->region.end) {
 			drm_err(&i915->drm,
-				"Initial plane programming using invalid range, phys_base=%pa (%s [%pa-%pa])\n",
-				&phys_base, mem->region.name, &mem->region.start, &mem->region.end);
+				"Initial plane programming using invalid range, dma_addr=%pa (%s [%pa-%pa])\n",
+				&dma_addr, mem->region.name, &mem->region.start, &mem->region.end);
 			return NULL;
 		}
 
 		drm_dbg(&i915->drm,
-			"Using phys_base=%pa, based on initial plane programming\n",
-			&phys_base);
+			"Using dma_addr=%pa, based on initial plane programming\n",
+			&dma_addr);
 
-		phys_base -= mem->region.start;
+		phys_base = dma_addr - mem->region.start;
 	} else {
 		phys_base = base;
 		mem = i915->mm.stolen_region;