drm/i915: Move rotated geometry calculations into the fill helper

This way data is available as soon as the view is passed into the call chain.

v2: Store size in bytes instead of pages under the appropriate name. (Chris Wilson)

v3: Use uint64_t instead of size_t. (Daniel Vetter)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> (v2)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 6851943..292d69e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2268,6 +2268,7 @@
 			const struct drm_plane_state *plane_state)
 {
 	struct intel_rotation_info *info = &view->rotation_info;
+	unsigned int tile_height, tile_pitch;
 
 	*view = i915_ggtt_view_normal;
 
@@ -2284,6 +2285,13 @@
 	info->pitch = fb->pitches[0];
 	info->fb_modifier = fb->modifier[0];
 
+	tile_height = intel_tile_height(fb->dev, fb->pixel_format,
+					fb->modifier[0]);
+	tile_pitch = PAGE_SIZE / tile_height;
+	info->width_pages = DIV_ROUND_UP(fb->pitches[0], tile_pitch);
+	info->height_pages = DIV_ROUND_UP(fb->height, tile_height);
+	info->size = info->width_pages * info->height_pages * PAGE_SIZE;
+
 	return 0;
 }