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1 | /* |
2 | * Copyright © 2006-2010 Intel Corporation | |
3 | * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice (including the next | |
13 | * paragraph) shall be included in all copies or substantial portions of the | |
14 | * Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
22 | * DEALINGS IN THE SOFTWARE. | |
23 | * | |
24 | * Authors: | |
25 | * Eric Anholt <eric@anholt.net> | |
26 | * Dave Airlie <airlied@linux.ie> | |
27 | * Jesse Barnes <jesse.barnes@intel.com> | |
28 | * Chris Wilson <chris@chris-wilson.co.uk> | |
29 | */ | |
30 | ||
31 | #include "intel_drv.h" | |
32 | ||
33 | void | |
34 | intel_fixed_panel_mode(struct drm_display_mode *fixed_mode, | |
35 | struct drm_display_mode *adjusted_mode) | |
36 | { | |
37 | adjusted_mode->hdisplay = fixed_mode->hdisplay; | |
38 | adjusted_mode->hsync_start = fixed_mode->hsync_start; | |
39 | adjusted_mode->hsync_end = fixed_mode->hsync_end; | |
40 | adjusted_mode->htotal = fixed_mode->htotal; | |
41 | ||
42 | adjusted_mode->vdisplay = fixed_mode->vdisplay; | |
43 | adjusted_mode->vsync_start = fixed_mode->vsync_start; | |
44 | adjusted_mode->vsync_end = fixed_mode->vsync_end; | |
45 | adjusted_mode->vtotal = fixed_mode->vtotal; | |
46 | ||
47 | adjusted_mode->clock = fixed_mode->clock; | |
48 | ||
49 | drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); | |
50 | } | |
51 | ||
52 | /* adjusted_mode has been preset to be the panel's fixed mode */ | |
53 | void | |
54 | intel_pch_panel_fitting(struct drm_device *dev, | |
55 | int fitting_mode, | |
56 | struct drm_display_mode *mode, | |
57 | struct drm_display_mode *adjusted_mode) | |
58 | { | |
59 | struct drm_i915_private *dev_priv = dev->dev_private; | |
60 | int x, y, width, height; | |
61 | ||
62 | x = y = width = height = 0; | |
63 | ||
64 | /* Native modes don't need fitting */ | |
65 | if (adjusted_mode->hdisplay == mode->hdisplay && | |
66 | adjusted_mode->vdisplay == mode->vdisplay) | |
67 | goto done; | |
68 | ||
69 | switch (fitting_mode) { | |
70 | case DRM_MODE_SCALE_CENTER: | |
71 | width = mode->hdisplay; | |
72 | height = mode->vdisplay; | |
73 | x = (adjusted_mode->hdisplay - width + 1)/2; | |
74 | y = (adjusted_mode->vdisplay - height + 1)/2; | |
75 | break; | |
76 | ||
77 | case DRM_MODE_SCALE_ASPECT: | |
78 | /* Scale but preserve the aspect ratio */ | |
79 | { | |
80 | u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay; | |
81 | u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay; | |
82 | if (scaled_width > scaled_height) { /* pillar */ | |
83 | width = scaled_height / mode->vdisplay; | |
84 | x = (adjusted_mode->hdisplay - width + 1) / 2; | |
85 | y = 0; | |
86 | height = adjusted_mode->vdisplay; | |
87 | } else if (scaled_width < scaled_height) { /* letter */ | |
88 | height = scaled_width / mode->hdisplay; | |
89 | y = (adjusted_mode->vdisplay - height + 1) / 2; | |
90 | x = 0; | |
91 | width = adjusted_mode->hdisplay; | |
92 | } else { | |
93 | x = y = 0; | |
94 | width = adjusted_mode->hdisplay; | |
95 | height = adjusted_mode->vdisplay; | |
96 | } | |
97 | } | |
98 | break; | |
99 | ||
100 | default: | |
101 | case DRM_MODE_SCALE_FULLSCREEN: | |
102 | x = y = 0; | |
103 | width = adjusted_mode->hdisplay; | |
104 | height = adjusted_mode->vdisplay; | |
105 | break; | |
106 | } | |
107 | ||
108 | done: | |
109 | dev_priv->pch_pf_pos = (x << 16) | y; | |
110 | dev_priv->pch_pf_size = (width << 16) | height; | |
111 | } |