drm/i915: Refactor intel_surf_alignment()

Pull the code to determine the surface alignment for both linear and
tiled surfaces into a separate function intel_surf_alignment(). This
will be used not only for the vma alignment but actually aligning
the plane SURF once SKL+ starts using intel_compute_page_offset()
(since SKL+ needs >4K alignment for tiled surfaces too).

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/1452625717-9713-8-git-send-email-ville.syrjala@linux.intel.com

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bffeacf..e5eb341 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2330,7 +2330,7 @@ intel_fill_fb_ggtt_view(struct i915_ggtt_view *view, struct drm_framebuffer *fb,
        }
 }
 
-static unsigned int intel_linear_alignment(struct drm_i915_private *dev_priv)
+static unsigned int intel_linear_alignment(const struct drm_i915_private *dev_priv)
 {
        if (INTEL_INFO(dev_priv)->gen >= 9)
                return 256 * 1024;
@@ -2343,6 +2343,25 @@ static unsigned int intel_linear_alignment(struct drm_i915_private *dev_priv)
                return 0;
 }
 
+static unsigned int intel_surf_alignment(const struct drm_i915_private *dev_priv,
+                                        uint64_t fb_modifier)
+{
+       switch (fb_modifier) {
+       case DRM_FORMAT_MOD_NONE:
+               return intel_linear_alignment(dev_priv);
+       case I915_FORMAT_MOD_X_TILED:
+               if (INTEL_INFO(dev_priv)->gen >= 9)
+                       return 256 * 1024;
+               return 0;
+       case I915_FORMAT_MOD_Y_TILED:
+       case I915_FORMAT_MOD_Yf_TILED:
+               return 1 * 1024 * 1024;
+       default:
+               MISSING_CASE(fb_modifier);
+               return 0;
+       }
+}
+
 int
 intel_pin_and_fence_fb_obj(struct drm_plane *plane,
                           struct drm_framebuffer *fb,
@@ -2357,29 +2376,7 @@ intel_pin_and_fence_fb_obj(struct drm_plane *plane,
 
        WARN_ON(!mutex_is_locked(&dev->struct_mutex));
 
-       switch (fb->modifier[0]) {
-       case DRM_FORMAT_MOD_NONE:
-               alignment = intel_linear_alignment(dev_priv);
-               break;
-       case I915_FORMAT_MOD_X_TILED:
-               if (INTEL_INFO(dev)->gen >= 9)
-                       alignment = 256 * 1024;
-               else {
-                       /* pin() will align the object as required by fence */
-                       alignment = 0;
-               }
-               break;
-       case I915_FORMAT_MOD_Y_TILED:
-       case I915_FORMAT_MOD_Yf_TILED:
-               if (WARN_ONCE(INTEL_INFO(dev)->gen < 9,
-                         "Y tiling bo slipped through, driver bug!\n"))
-                       return -EINVAL;
-               alignment = 1 * 1024 * 1024;
-               break;
-       default:
-               MISSING_CASE(fb->modifier[0]);
-               return -EINVAL;
-       }
+       alignment = intel_surf_alignment(dev_priv, fb->modifier[0]);
 
        intel_fill_fb_ggtt_view(&view, fb, plane_state);