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 33void 34intel_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 */ 53void 54intel_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 108done: 109 dev_priv->pch_pf_pos = (x << 16) | y; 110 dev_priv->pch_pf_size = (width << 16) | height; 111} 112