521 lines
15 KiB
C
521 lines
15 KiB
C
/*
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* Copyright © 2006-2007 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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*/
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#include <linux/dmi.h>
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#include <linux/i2c.h>
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#include "drmP.h"
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#include "drm.h"
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#include "drm_crtc.h"
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#include "drm_edid.h"
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#include "intel_drv.h"
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#include "i915_drm.h"
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#include "i915_drv.h"
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/**
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* Sets the backlight level.
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*
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* \param level backlight level, from 0 to intel_lvds_get_max_backlight().
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*/
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static void intel_lvds_set_backlight(struct drm_device *dev, int level)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 blc_pwm_ctl;
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blc_pwm_ctl = I915_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
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I915_WRITE(BLC_PWM_CTL, (blc_pwm_ctl |
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(level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
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}
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/**
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* Returns the maximum level of the backlight duty cycle field.
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*/
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static u32 intel_lvds_get_max_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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return ((I915_READ(BLC_PWM_CTL) & BACKLIGHT_MODULATION_FREQ_MASK) >>
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BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
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}
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/**
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* Sets the power state for the panel.
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*/
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static void intel_lvds_set_power(struct drm_device *dev, bool on)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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u32 pp_status;
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if (on) {
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I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) |
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POWER_TARGET_ON);
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do {
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pp_status = I915_READ(PP_STATUS);
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} while ((pp_status & PP_ON) == 0);
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intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle);
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} else {
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intel_lvds_set_backlight(dev, 0);
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I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) &
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~POWER_TARGET_ON);
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do {
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pp_status = I915_READ(PP_STATUS);
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} while (pp_status & PP_ON);
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}
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}
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static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
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{
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struct drm_device *dev = encoder->dev;
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if (mode == DRM_MODE_DPMS_ON)
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intel_lvds_set_power(dev, true);
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else
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intel_lvds_set_power(dev, false);
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/* XXX: We never power down the LVDS pairs. */
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}
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static void intel_lvds_save(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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dev_priv->savePP_ON = I915_READ(PP_ON_DELAYS);
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dev_priv->savePP_OFF = I915_READ(PP_OFF_DELAYS);
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dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
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dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
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dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
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dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
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BACKLIGHT_DUTY_CYCLE_MASK);
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/*
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* If the light is off at server startup, just make it full brightness
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*/
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if (dev_priv->backlight_duty_cycle == 0)
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dev_priv->backlight_duty_cycle =
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intel_lvds_get_max_backlight(dev);
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}
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static void intel_lvds_restore(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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I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
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I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON);
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I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF);
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I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
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I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
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if (dev_priv->savePP_CONTROL & POWER_TARGET_ON)
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intel_lvds_set_power(dev, true);
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else
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intel_lvds_set_power(dev, false);
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}
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static int intel_lvds_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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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 drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode;
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if (fixed_mode) {
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if (mode->hdisplay > fixed_mode->hdisplay)
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return MODE_PANEL;
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if (mode->vdisplay > fixed_mode->vdisplay)
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return MODE_PANEL;
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}
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return MODE_OK;
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}
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static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
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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_device *dev = encoder->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
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struct drm_encoder *tmp_encoder;
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/* Should never happen!! */
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if (!IS_I965G(dev) && intel_crtc->pipe == 0) {
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printk(KERN_ERR "Can't support LVDS on pipe A\n");
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return false;
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}
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/* Should never happen!! */
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list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
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if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
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printk(KERN_ERR "Can't enable LVDS and another "
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"encoder on the same pipe\n");
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return false;
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}
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}
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/*
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* If we have timings from the BIOS for the panel, put them in
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* to the adjusted mode. The CRTC will be set up for this mode,
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* with the panel scaling set up to source from the H/VDisplay
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* of the original mode.
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*/
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if (dev_priv->panel_fixed_mode != NULL) {
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adjusted_mode->hdisplay = dev_priv->panel_fixed_mode->hdisplay;
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adjusted_mode->hsync_start =
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dev_priv->panel_fixed_mode->hsync_start;
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adjusted_mode->hsync_end =
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dev_priv->panel_fixed_mode->hsync_end;
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adjusted_mode->htotal = dev_priv->panel_fixed_mode->htotal;
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adjusted_mode->vdisplay = dev_priv->panel_fixed_mode->vdisplay;
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adjusted_mode->vsync_start =
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dev_priv->panel_fixed_mode->vsync_start;
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adjusted_mode->vsync_end =
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dev_priv->panel_fixed_mode->vsync_end;
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adjusted_mode->vtotal = dev_priv->panel_fixed_mode->vtotal;
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adjusted_mode->clock = dev_priv->panel_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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/*
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* XXX: It would be nice to support lower refresh rates on the
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* panels to reduce power consumption, and perhaps match the
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* user's requested refresh rate.
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*/
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return true;
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}
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static void intel_lvds_prepare(struct drm_encoder *encoder)
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{
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struct drm_device *dev = encoder->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
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dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
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BACKLIGHT_DUTY_CYCLE_MASK);
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intel_lvds_set_power(dev, false);
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}
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static void intel_lvds_commit( struct drm_encoder *encoder)
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{
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struct drm_device *dev = encoder->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (dev_priv->backlight_duty_cycle == 0)
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dev_priv->backlight_duty_cycle =
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intel_lvds_get_max_backlight(dev);
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intel_lvds_set_power(dev, true);
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}
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static void intel_lvds_mode_set(struct drm_encoder *encoder,
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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_device *dev = encoder->dev;
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
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u32 pfit_control;
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/*
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* The LVDS pin pair will already have been turned on in the
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* intel_crtc_mode_set since it has a large impact on the DPLL
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* settings.
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*/
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/*
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* Enable automatic panel scaling so that non-native modes fill the
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* screen. Should be enabled before the pipe is enabled, according to
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* register description and PRM.
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*/
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if (mode->hdisplay != adjusted_mode->hdisplay ||
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mode->vdisplay != adjusted_mode->vdisplay)
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pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
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HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
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HORIZ_INTERP_BILINEAR);
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else
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pfit_control = 0;
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if (!IS_I965G(dev)) {
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if (dev_priv->panel_wants_dither || dev_priv->lvds_dither)
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pfit_control |= PANEL_8TO6_DITHER_ENABLE;
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}
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else
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pfit_control |= intel_crtc->pipe << PFIT_PIPE_SHIFT;
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I915_WRITE(PFIT_CONTROL, pfit_control);
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}
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/**
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* Detect the LVDS connection.
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*
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* This always returns CONNECTOR_STATUS_CONNECTED. This connector should only have
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* been set up if the LVDS was actually connected anyway.
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*/
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static enum drm_connector_status intel_lvds_detect(struct drm_connector *connector)
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{
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return connector_status_connected;
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}
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/**
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* Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
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*/
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static int intel_lvds_get_modes(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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struct intel_output *intel_output = to_intel_output(connector);
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struct drm_i915_private *dev_priv = dev->dev_private;
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int ret = 0;
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ret = intel_ddc_get_modes(intel_output);
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if (ret)
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return ret;
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/* Didn't get an EDID, so
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* Set wide sync ranges so we get all modes
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* handed to valid_mode for checking
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*/
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connector->display_info.min_vfreq = 0;
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connector->display_info.max_vfreq = 200;
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connector->display_info.min_hfreq = 0;
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connector->display_info.max_hfreq = 200;
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if (dev_priv->panel_fixed_mode != NULL) {
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
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drm_mode_probed_add(connector, mode);
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return 1;
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}
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return 0;
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}
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/**
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* intel_lvds_destroy - unregister and free LVDS structures
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* @connector: connector to free
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*
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* Unregister the DDC bus for this connector then free the driver private
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* structure.
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*/
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static void intel_lvds_destroy(struct drm_connector *connector)
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{
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struct intel_output *intel_output = to_intel_output(connector);
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if (intel_output->ddc_bus)
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intel_i2c_destroy(intel_output->ddc_bus);
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drm_sysfs_connector_remove(connector);
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drm_connector_cleanup(connector);
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kfree(connector);
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}
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static int intel_lvds_set_property(struct drm_connector *connector,
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struct drm_property *property,
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uint64_t value)
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{
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struct drm_device *dev = connector->dev;
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if (property == dev->mode_config.dpms_property && connector->encoder)
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intel_lvds_dpms(connector->encoder, (uint32_t)(value & 0xf));
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return 0;
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}
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static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
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.dpms = intel_lvds_dpms,
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.mode_fixup = intel_lvds_mode_fixup,
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.prepare = intel_lvds_prepare,
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.mode_set = intel_lvds_mode_set,
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.commit = intel_lvds_commit,
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};
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static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
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.get_modes = intel_lvds_get_modes,
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.mode_valid = intel_lvds_mode_valid,
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.best_encoder = intel_best_encoder,
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};
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static const struct drm_connector_funcs intel_lvds_connector_funcs = {
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.save = intel_lvds_save,
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.restore = intel_lvds_restore,
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.detect = intel_lvds_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.set_property = intel_lvds_set_property,
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.destroy = intel_lvds_destroy,
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};
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static void intel_lvds_enc_destroy(struct drm_encoder *encoder)
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{
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drm_encoder_cleanup(encoder);
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}
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static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
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.destroy = intel_lvds_enc_destroy,
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};
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/**
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* intel_lvds_init - setup LVDS connectors on this device
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* @dev: drm device
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*
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* Create the connector, register the LVDS DDC bus, and try to figure out what
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* modes we can display on the LVDS panel (if present).
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*/
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void intel_lvds_init(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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struct intel_output *intel_output;
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struct drm_connector *connector;
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struct drm_encoder *encoder;
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struct drm_display_mode *scan; /* *modes, *bios_mode; */
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struct drm_crtc *crtc;
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u32 lvds;
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int pipe;
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/* Blacklist machines that we know falsely report LVDS. */
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/* FIXME: add a check for the Aopen Mini PC */
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/* Apple Mac Mini Core Duo and Mac Mini Core 2 Duo */
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if(dmi_match(DMI_PRODUCT_NAME, "Macmini1,1") ||
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dmi_match(DMI_PRODUCT_NAME, "Macmini2,1")) {
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DRM_DEBUG("Skipping LVDS initialization for Apple Mac Mini\n");
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return;
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}
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intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
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if (!intel_output) {
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return;
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}
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connector = &intel_output->base;
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encoder = &intel_output->enc;
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drm_connector_init(dev, &intel_output->base, &intel_lvds_connector_funcs,
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DRM_MODE_CONNECTOR_LVDS);
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drm_encoder_init(dev, &intel_output->enc, &intel_lvds_enc_funcs,
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DRM_MODE_ENCODER_LVDS);
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drm_mode_connector_attach_encoder(&intel_output->base, &intel_output->enc);
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intel_output->type = INTEL_OUTPUT_LVDS;
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drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
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drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
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connector->display_info.subpixel_order = SubPixelHorizontalRGB;
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connector->interlace_allowed = false;
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connector->doublescan_allowed = false;
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/*
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* LVDS discovery:
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* 1) check for EDID on DDC
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* 2) check for VBT data
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* 3) check to see if LVDS is already on
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* if none of the above, no panel
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* 4) make sure lid is open
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* if closed, act like it's not there for now
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*/
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/* Set up the DDC bus. */
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intel_output->ddc_bus = intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
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if (!intel_output->ddc_bus) {
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dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
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"failed.\n");
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goto failed;
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}
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/*
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* Attempt to get the fixed panel mode from DDC. Assume that the
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* preferred mode is the right one.
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*/
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intel_ddc_get_modes(intel_output);
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list_for_each_entry(scan, &connector->probed_modes, head) {
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mutex_lock(&dev->mode_config.mutex);
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if (scan->type & DRM_MODE_TYPE_PREFERRED) {
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dev_priv->panel_fixed_mode =
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drm_mode_duplicate(dev, scan);
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mutex_unlock(&dev->mode_config.mutex);
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goto out;
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}
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mutex_unlock(&dev->mode_config.mutex);
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}
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/* Failed to get EDID, what about VBT? */
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if (dev_priv->vbt_mode) {
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mutex_lock(&dev->mode_config.mutex);
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dev_priv->panel_fixed_mode =
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drm_mode_duplicate(dev, dev_priv->vbt_mode);
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mutex_unlock(&dev->mode_config.mutex);
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if (dev_priv->panel_fixed_mode) {
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dev_priv->panel_fixed_mode->type |=
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DRM_MODE_TYPE_PREFERRED;
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goto out;
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}
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}
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|
|
|
/*
|
|
* If we didn't get EDID, try checking if the panel is already turned
|
|
* on. If so, assume that whatever is currently programmed is the
|
|
* correct mode.
|
|
*/
|
|
lvds = I915_READ(LVDS);
|
|
pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
|
|
crtc = intel_get_crtc_from_pipe(dev, pipe);
|
|
|
|
if (crtc && (lvds & LVDS_PORT_EN)) {
|
|
dev_priv->panel_fixed_mode = intel_crtc_mode_get(dev, crtc);
|
|
if (dev_priv->panel_fixed_mode) {
|
|
dev_priv->panel_fixed_mode->type |=
|
|
DRM_MODE_TYPE_PREFERRED;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* If we still don't have a mode after all that, give up. */
|
|
if (!dev_priv->panel_fixed_mode)
|
|
goto failed;
|
|
|
|
out:
|
|
drm_sysfs_connector_add(connector);
|
|
return;
|
|
|
|
failed:
|
|
DRM_DEBUG("No LVDS modes found, disabling.\n");
|
|
if (intel_output->ddc_bus)
|
|
intel_i2c_destroy(intel_output->ddc_bus);
|
|
drm_connector_cleanup(connector);
|
|
kfree(connector);
|
|
}
|