[Intel-gfx] [PATCH 09/22] drm/i915: Refactor intel_surf_alignment()

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

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 at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 45 +++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bd55d06..5f3abce 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2321,7 +2321,7 @@ intel_fill_fb_ggtt_view(struct i915_ggtt_view *view, struct drm_framebuffer *fb,
 	return 0;
 }
 
-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;
@@ -2334,6 +2334,25 @@ 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,
@@ -2350,29 +2369,7 @@ 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]);
 
 	ret = intel_fill_fb_ggtt_view(&view, fb, plane_state);
 	if (ret)
-- 
2.4.9