drm/i915/xehpsdv: set min page-size to 64K

Conditionally allocate LMEM with 64K granularity, since 4K page support
for LMEM will be dropped on some platforms when using the PPGTT.

v2:
updated commit msg [Thomas]

Signed-off-by: Matthew Auld <[e-mail]>
Signed-off-by: Stuart Summers <[e-mail]>
Signed-off-by: Ramalingam C <[e-mail]>
Cc: Joonas Lahtinen <[e-mail]>
Cc: Rodrigo Vivi <[e-mail]>
Reviewed-by: Lucas De Marchi <[e-mail]>
Reviewed-by: Thomas Hellstrom <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/gem/i915_gem_stolen.c

···
 	struct intel_uncore *uncore = &i915->uncore;
 	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
 	struct intel_memory_region *mem;
+	resource_size_t min_page_size;
 	resource_size_t io_start;
 	resource_size_t lmem_size;
 	u64 lmem_base;
···
 	lmem_size = pci_resource_len(pdev, 2) - lmem_base;
 	io_start = pci_resource_start(pdev, 2) + lmem_base;
 
+	min_page_size = HAS_64K_PAGES(i915) ? I915_GTT_PAGE_SIZE_64K :
+						I915_GTT_PAGE_SIZE_4K;
+
 	mem = intel_memory_region_create(i915, lmem_base, lmem_size,
-					 I915_GTT_PAGE_SIZE_4K, io_start,
+					 min_page_size, io_start,
 					 type, instance,
 					 &i915_region_stolen_lmem_ops);
 	if (IS_ERR(mem))

drivers/gpu/drm/i915/gt/intel_region_lmem.c

···
 	struct intel_uncore *uncore = gt->uncore;
 	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
 	struct intel_memory_region *mem;
+	resource_size_t min_page_size;
 	resource_size_t io_start;
 	resource_size_t lmem_size;
 	int err;
···
 	if (GEM_WARN_ON(lmem_size > pci_resource_len(pdev, 2)))
 		return ERR_PTR(-ENODEV);
 
+	min_page_size = HAS_64K_PAGES(i915) ? I915_GTT_PAGE_SIZE_64K :
+						I915_GTT_PAGE_SIZE_4K;
 	mem = intel_memory_region_create(i915,
 					 0,
 					 lmem_size,
-					 I915_GTT_PAGE_SIZE_4K,
+					 min_page_size,
 					 io_start,
 					 INTEL_MEMORY_LOCAL,
 					 0,