drm/i915: change intel_fill_fb_ggtt_view() to use the real tile size

Use the actual tile size as to compute stuff in
intel_fill_fb_ggtt_view() instead of assuming it's PAGE_SIZE. I suppose
it doesn't matter since we don't use the results on gen2 platforms
where the tile size is 2k.

v2: Update due to CbCr plane

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1452625717-9713-5-git-send-email-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/intel_display.c

@@ -2291,8 +2291,7 @@ intel_fill_fb_ggtt_view(struct i915_ggtt_view *view, struct drm_framebuffer *fb,
 {
 	struct drm_i915_private *dev_priv = to_i915(fb->dev);
 	struct intel_rotation_info *info = &view->params.rotation_info;
-	unsigned int tile_height, tile_pitch;
-	unsigned int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
+	unsigned int tile_size, tile_width, tile_height, cpp;
 
 	*view = i915_ggtt_view_normal;
 
@@ -2310,19 +2309,24 @@ intel_fill_fb_ggtt_view(struct i915_ggtt_view *view, struct drm_framebuffer *fb,
 	info->uv_offset = fb->offsets[1];
 	info->fb_modifier = fb->modifier[0];
 
-	tile_height = intel_tile_height(dev_priv, fb->modifier[0], cpp);
-	tile_pitch = PAGE_SIZE / tile_height;
-	info->width_pages = DIV_ROUND_UP(fb->pitches[0], tile_pitch);
+	tile_size = intel_tile_size(dev_priv);
+
+	cpp = drm_format_plane_cpp(fb->pixel_format, 0);
+	tile_width = intel_tile_width(dev_priv, cpp, fb->modifier[0]);
+	tile_height = tile_size / tile_width;
+
+	info->width_pages = DIV_ROUND_UP(fb->pitches[0], tile_width);
 	info->height_pages = DIV_ROUND_UP(fb->height, tile_height);
-	info->size = info->width_pages * info->height_pages * PAGE_SIZE;
+	info->size = info->width_pages * info->height_pages * tile_size;
 
 	if (info->pixel_format == DRM_FORMAT_NV12) {
 		cpp = drm_format_plane_cpp(fb->pixel_format, 1);
-		tile_height = intel_tile_height(dev_priv, fb->modifier[1], cpp);
-		tile_pitch = PAGE_SIZE / tile_height;
-		info->width_pages_uv = DIV_ROUND_UP(fb->pitches[1], tile_pitch);
+		tile_width = intel_tile_width(dev_priv, fb->modifier[1], cpp);
+		tile_height = tile_size / tile_width;
+
+		info->width_pages_uv = DIV_ROUND_UP(fb->pitches[1], tile_width);
 		info->height_pages_uv = DIV_ROUND_UP(fb->height / 2, tile_height);
-		info->size_uv = info->width_pages_uv * info->height_pages_uv * PAGE_SIZE;
+		info->size_uv = info->width_pages_uv * info->height_pages_uv * tile_size;
 	}
 }