forked from Minki/linux
dc652f90e0
Backlight cleanup in the eDP connector destroy callback caused the backlight device to be removed on some systems that first initialized LVDS and then attempted to initialize eDP. Prevent multiple backlight initializations, and ensure backlight cleanup is only done once by moving it to modeset cleanup. A small wrinkle is the introduced asymmetry in backlight setup/cleanup. This could be solved by adding refcounting, but it seems overkill considering that there should only ever be one backlight device. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=55701 Signed-off-by: Jani Nikula <jani.nikula@intel.com> Tested-by: Peter Verthez <peter.verthez@skynet.be> Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
493 lines
13 KiB
C
493 lines
13 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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/moduleparam.h>
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#include "intel_drv.h"
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#define PCI_LBPC 0xf4 /* legacy/combination backlight modes */
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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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}
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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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const 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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if (width & 1)
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width++;
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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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if (height & 1)
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height++;
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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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static int is_backlight_combination_mode(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (INTEL_INFO(dev)->gen >= 4)
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return I915_READ(BLC_PWM_CTL2) & BLM_COMBINATION_MODE;
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if (IS_GEN2(dev))
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return I915_READ(BLC_PWM_CTL) & BLM_LEGACY_MODE;
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return 0;
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}
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static u32 i915_read_blc_pwm_ctl(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 val;
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/* Restore the CTL value if it lost, e.g. GPU reset */
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if (HAS_PCH_SPLIT(dev_priv->dev)) {
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val = I915_READ(BLC_PWM_PCH_CTL2);
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if (dev_priv->regfile.saveBLC_PWM_CTL2 == 0) {
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dev_priv->regfile.saveBLC_PWM_CTL2 = val;
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} else if (val == 0) {
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val = dev_priv->regfile.saveBLC_PWM_CTL2;
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I915_WRITE(BLC_PWM_PCH_CTL2, val);
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}
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} else {
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val = I915_READ(BLC_PWM_CTL);
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if (dev_priv->regfile.saveBLC_PWM_CTL == 0) {
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dev_priv->regfile.saveBLC_PWM_CTL = val;
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if (INTEL_INFO(dev)->gen >= 4)
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dev_priv->regfile.saveBLC_PWM_CTL2 =
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I915_READ(BLC_PWM_CTL2);
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} else if (val == 0) {
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val = dev_priv->regfile.saveBLC_PWM_CTL;
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I915_WRITE(BLC_PWM_CTL, val);
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if (INTEL_INFO(dev)->gen >= 4)
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I915_WRITE(BLC_PWM_CTL2,
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dev_priv->regfile.saveBLC_PWM_CTL2);
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}
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}
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return val;
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}
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static u32 _intel_panel_get_max_backlight(struct drm_device *dev)
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{
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u32 max;
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max = i915_read_blc_pwm_ctl(dev);
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if (HAS_PCH_SPLIT(dev)) {
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max >>= 16;
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} else {
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if (INTEL_INFO(dev)->gen < 4)
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max >>= 17;
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else
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max >>= 16;
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if (is_backlight_combination_mode(dev))
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max *= 0xff;
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}
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return max;
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}
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u32 intel_panel_get_max_backlight(struct drm_device *dev)
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{
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u32 max;
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max = _intel_panel_get_max_backlight(dev);
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if (max == 0) {
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/* XXX add code here to query mode clock or hardware clock
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* and program max PWM appropriately.
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*/
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pr_warn_once("fixme: max PWM is zero\n");
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return 1;
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}
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DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max);
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return max;
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}
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static int i915_panel_invert_brightness;
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MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness "
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"(-1 force normal, 0 machine defaults, 1 force inversion), please "
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"report PCI device ID, subsystem vendor and subsystem device ID "
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"to dri-devel@lists.freedesktop.org, if your machine needs it. "
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"It will then be included in an upcoming module version.");
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module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600);
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static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (i915_panel_invert_brightness < 0)
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return val;
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if (i915_panel_invert_brightness > 0 ||
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dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)
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return intel_panel_get_max_backlight(dev) - val;
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return val;
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}
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static u32 intel_panel_get_backlight(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 val;
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if (HAS_PCH_SPLIT(dev)) {
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val = I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
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} else {
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val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
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if (INTEL_INFO(dev)->gen < 4)
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val >>= 1;
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if (is_backlight_combination_mode(dev)) {
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u8 lbpc;
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pci_read_config_byte(dev->pdev, PCI_LBPC, &lbpc);
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val *= lbpc;
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}
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}
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val = intel_panel_compute_brightness(dev, val);
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DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
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return val;
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}
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static void intel_pch_panel_set_backlight(struct drm_device *dev, u32 level)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 val = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
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I915_WRITE(BLC_PWM_CPU_CTL, val | level);
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}
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static void intel_panel_actually_set_backlight(struct drm_device *dev, u32 level)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 tmp;
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DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);
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level = intel_panel_compute_brightness(dev, level);
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if (HAS_PCH_SPLIT(dev))
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return intel_pch_panel_set_backlight(dev, level);
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if (is_backlight_combination_mode(dev)) {
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u32 max = intel_panel_get_max_backlight(dev);
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u8 lbpc;
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lbpc = level * 0xfe / max + 1;
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level /= lbpc;
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pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
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}
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tmp = I915_READ(BLC_PWM_CTL);
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if (INTEL_INFO(dev)->gen < 4)
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level <<= 1;
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tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
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I915_WRITE(BLC_PWM_CTL, tmp | level);
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}
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void intel_panel_set_backlight(struct drm_device *dev, u32 level)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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dev_priv->backlight.level = level;
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if (dev_priv->backlight.device)
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dev_priv->backlight.device->props.brightness = level;
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if (dev_priv->backlight.enabled)
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intel_panel_actually_set_backlight(dev, level);
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}
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void intel_panel_disable_backlight(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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dev_priv->backlight.enabled = false;
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intel_panel_actually_set_backlight(dev, 0);
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if (INTEL_INFO(dev)->gen >= 4) {
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uint32_t reg, tmp;
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reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2;
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I915_WRITE(reg, I915_READ(reg) & ~BLM_PWM_ENABLE);
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if (HAS_PCH_SPLIT(dev)) {
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tmp = I915_READ(BLC_PWM_PCH_CTL1);
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tmp &= ~BLM_PCH_PWM_ENABLE;
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I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
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}
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}
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}
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void intel_panel_enable_backlight(struct drm_device *dev,
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enum pipe pipe)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (dev_priv->backlight.level == 0) {
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dev_priv->backlight.level = intel_panel_get_max_backlight(dev);
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if (dev_priv->backlight.device)
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dev_priv->backlight.device->props.brightness =
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dev_priv->backlight.level;
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}
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if (INTEL_INFO(dev)->gen >= 4) {
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uint32_t reg, tmp;
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reg = HAS_PCH_SPLIT(dev) ? BLC_PWM_CPU_CTL2 : BLC_PWM_CTL2;
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tmp = I915_READ(reg);
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/* Note that this can also get called through dpms changes. And
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* we don't track the backlight dpms state, hence check whether
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* we have to do anything first. */
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if (tmp & BLM_PWM_ENABLE)
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goto set_level;
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if (INTEL_INFO(dev)->num_pipes == 3)
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tmp &= ~BLM_PIPE_SELECT_IVB;
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else
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tmp &= ~BLM_PIPE_SELECT;
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tmp |= BLM_PIPE(pipe);
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tmp &= ~BLM_PWM_ENABLE;
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I915_WRITE(reg, tmp);
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POSTING_READ(reg);
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I915_WRITE(reg, tmp | BLM_PWM_ENABLE);
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if (HAS_PCH_SPLIT(dev)) {
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tmp = I915_READ(BLC_PWM_PCH_CTL1);
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tmp |= BLM_PCH_PWM_ENABLE;
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tmp &= ~BLM_PCH_OVERRIDE_ENABLE;
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I915_WRITE(BLC_PWM_PCH_CTL1, tmp);
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}
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}
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set_level:
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/* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1.
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* BLC_PWM_CPU_CTL may be cleared to zero automatically when these
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* registers are set.
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*/
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dev_priv->backlight.enabled = true;
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intel_panel_actually_set_backlight(dev, dev_priv->backlight.level);
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}
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static void intel_panel_init_backlight(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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dev_priv->backlight.level = intel_panel_get_backlight(dev);
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dev_priv->backlight.enabled = dev_priv->backlight.level != 0;
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}
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enum drm_connector_status
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intel_panel_detect(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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/* Assume that the BIOS does not lie through the OpRegion... */
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if (!i915_panel_ignore_lid && dev_priv->opregion.lid_state) {
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return ioread32(dev_priv->opregion.lid_state) & 0x1 ?
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connector_status_connected :
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connector_status_disconnected;
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}
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switch (i915_panel_ignore_lid) {
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case -2:
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return connector_status_connected;
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case -1:
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return connector_status_disconnected;
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default:
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return connector_status_unknown;
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}
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}
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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static int intel_panel_update_status(struct backlight_device *bd)
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{
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struct drm_device *dev = bl_get_data(bd);
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intel_panel_set_backlight(dev, bd->props.brightness);
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return 0;
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}
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static int intel_panel_get_brightness(struct backlight_device *bd)
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{
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struct drm_device *dev = bl_get_data(bd);
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return intel_panel_get_backlight(dev);
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}
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static const struct backlight_ops intel_panel_bl_ops = {
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.update_status = intel_panel_update_status,
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.get_brightness = intel_panel_get_brightness,
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};
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int intel_panel_setup_backlight(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct backlight_properties props;
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intel_panel_init_backlight(dev);
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if (WARN_ON(dev_priv->backlight.device))
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return -ENODEV;
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memset(&props, 0, sizeof(props));
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props.type = BACKLIGHT_RAW;
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props.brightness = dev_priv->backlight.level;
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props.max_brightness = _intel_panel_get_max_backlight(dev);
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if (props.max_brightness == 0) {
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DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n");
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return -ENODEV;
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}
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dev_priv->backlight.device =
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backlight_device_register("intel_backlight",
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&connector->kdev, dev,
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&intel_panel_bl_ops, &props);
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if (IS_ERR(dev_priv->backlight.device)) {
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DRM_ERROR("Failed to register backlight: %ld\n",
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PTR_ERR(dev_priv->backlight.device));
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dev_priv->backlight.device = NULL;
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return -ENODEV;
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}
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return 0;
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}
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void intel_panel_destroy_backlight(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (dev_priv->backlight.device) {
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backlight_device_unregister(dev_priv->backlight.device);
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dev_priv->backlight.device = NULL;
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}
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}
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#else
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int intel_panel_setup_backlight(struct drm_connector *connector)
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{
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intel_panel_init_backlight(connector->dev);
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return 0;
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}
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void intel_panel_destroy_backlight(struct drm_device *dev)
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{
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return;
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}
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#endif
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int intel_panel_init(struct intel_panel *panel,
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struct drm_display_mode *fixed_mode)
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{
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panel->fixed_mode = fixed_mode;
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return 0;
|
|
}
|
|
|
|
void intel_panel_fini(struct intel_panel *panel)
|
|
{
|
|
struct intel_connector *intel_connector =
|
|
container_of(panel, struct intel_connector, panel);
|
|
|
|
if (panel->fixed_mode)
|
|
drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
|
|
}
|