/*
* 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>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/moduleparam.h>
#include "intel_drv.h"
void
intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
struct drm_display_mode *adjusted_mode)
{
drm_mode_copy(adjusted_mode, fixed_mode);
drm_mode_set_crtcinfo(adjusted_mode, 0);
}
/**
* intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
* @dev: drm device
* @fixed_mode : panel native mode
* @connector: LVDS/eDP connector
*
* Return downclock_avail
* Find the reduced downclock for LVDS/eDP in EDID.
*/
struct drm_display_mode *
intel_find_panel_downclock(struct drm_device *dev,
struct drm_display_mode *fixed_mode,
struct drm_connector *connector)
{
struct drm_display_mode *scan, *tmp_mode;
int temp_downclock;
temp_downclock = fixed_mode->clock;
tmp_mode = NULL;
list_for_each_entry(scan, &connector->probed_modes, head) {
/*
* If one mode has the same resolution with the fixed_panel
* mode while they have the different refresh rate, it means
* that the reduced downclock is found. In such
* case we can set the different FPx0/1 to dynamically select
* between low and high frequency.
*/
if (scan->hdisplay == fixed_mode->hdisplay &&
scan->hsync_start == fixed_mode->hsync_start &&
scan->hsync_end == fixed_mode->hsync_end &&
scan->htotal == fixed_mode->htotal &&
scan->vdisplay == fixed_mode->vdisplay &&