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