1 files changed, 111 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
new file mode 100644
index 00000000000..e7f5299d9d5
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright © 2006-2010 Intel Corporation
+ * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *      Eric Anholt <eric@anholt.net>
+ *      Dave Airlie <airlied@linux.ie>
+ *      Jesse Barnes <jesse.barnes@intel.com>
+ *      Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "intel_drv.h"
+
+void
+intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
+                       struct drm_display_mode *adjusted_mode)
+{
+        adjusted_mode->hdisplay = fixed_mode->hdisplay;
+        adjusted_mode->hsync_start = fixed_mode->hsync_start;
+        adjusted_mode->hsync_end = fixed_mode->hsync_end;
+        adjusted_mode->htotal = fixed_mode->htotal;
+
+        adjusted_mode->vdisplay = fixed_mode->vdisplay;
+        adjusted_mode->vsync_start = fixed_mode->vsync_start;
+        adjusted_mode->vsync_end = fixed_mode->vsync_end;
+        adjusted_mode->vtotal = fixed_mode->vtotal;
+
+        adjusted_mode->clock = fixed_mode->clock;
+
+        drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
+}
+
+/* adjusted_mode has been preset to be the panel's fixed mode */
+void
+intel_pch_panel_fitting(struct drm_device *dev,
+                        int fitting_mode,
+                        struct drm_display_mode *mode,
+                        struct drm_display_mode *adjusted_mode)
+{
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        int x, y, width, height;
+
+        x = y = width = height = 0;
+
+        /* Native modes don't need fitting */
+        if (adjusted_mode->hdisplay == mode->hdisplay &&
+            adjusted_mode->vdisplay == mode->vdisplay)
+                goto done;
+
+        switch (fitting_mode) {
+        case DRM_MODE_SCALE_CENTER:
+                width = mode->hdisplay;
+                height = mode->vdisplay;
+                x = (adjusted_mode->hdisplay - width + 1)/2;
+                y = (adjusted_mode->vdisplay - height + 1)/2;
+                break;
+
+        case DRM_MODE_SCALE_ASPECT:
+                /* Scale but preserve the aspect ratio */
+                {
+                        u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay;
+                        u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay;
+                        if (scaled_width > scaled_height) { /* pillar */
+                                width = scaled_height / mode->vdisplay;
+                                x = (adjusted_mode->hdisplay - width + 1) / 2;
+                                y = 0;
+                                height = adjusted_mode->vdisplay;
+                        } else if (scaled_width < scaled_height) { /* letter */
+                                height = scaled_width / mode->hdisplay;
+                                y = (adjusted_mode->vdisplay - height + 1) / 2;
+                                x = 0;
+                                width = adjusted_mode->hdisplay;
+                        } else {
+                                x = y = 0;
+                                width = adjusted_mode->hdisplay;
+                                height = adjusted_mode->vdisplay;
+                        }
+                }
+                break;
+
+        default:
+        case DRM_MODE_SCALE_FULLSCREEN:
+                x = y = 0;
+                width = adjusted_mode->hdisplay;
+                height = adjusted_mode->vdisplay;
+                break;
+        }
+
+done:
+        dev_priv->pch_pf_pos = (x << 16) | y;
+        dev_priv->pch_pf_size = (width << 16) | height;
+}