[net-next-2.6.git] / drivers / gpu / drm / i915 / intel_lvds.c

/*
 * Copyright © 2006-2007 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>
 */

#include <linux/dmi.h>
#include <linux/i2c.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "drm_edid.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"

/**
 * Sets the backlight level.
 *
 * \param level backlight level, from 0 to intel_lvds_get_max_backlight().
 */
static void intel_lvds_set_backlight(struct drm_device *dev, int level)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	u32 blc_pwm_ctl;

	blc_pwm_ctl = I915_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
	I915_WRITE(BLC_PWM_CTL, (blc_pwm_ctl |
				 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
}

/**
 * Returns the maximum level of the backlight duty cycle field.
 */
static u32 intel_lvds_get_max_backlight(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;

	return ((I915_READ(BLC_PWM_CTL) & BACKLIGHT_MODULATION_FREQ_MASK) >>
		BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
}

/**
 * Sets the power state for the panel.
 */
static void intel_lvds_set_power(struct drm_device *dev, bool on)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	u32 pp_status;

	if (on) {
		I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) |
			   POWER_TARGET_ON);
		do {
			pp_status = I915_READ(PP_STATUS);
		} while ((pp_status & PP_ON) == 0);

		intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle);
	} else {
		intel_lvds_set_backlight(dev, 0);

		I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) &
			   ~POWER_TARGET_ON);
		do {
			pp_status = I915_READ(PP_STATUS);
		} while (pp_status & PP_ON);
	}
}

static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
{
	struct drm_device *dev = encoder->dev;

	if (mode == DRM_MODE_DPMS_ON)
		intel_lvds_set_power(dev, true);
	else
		intel_lvds_set_power(dev, false);

	/* XXX: We never power down the LVDS pairs. */
}

static void intel_lvds_save(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	dev_priv->savePP_ON = I915_READ(PP_ON_DELAYS);
	dev_priv->savePP_OFF = I915_READ(PP_OFF_DELAYS);
	dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
	dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
	dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
				       BACKLIGHT_DUTY_CYCLE_MASK);

	/*
	 * If the light is off at server startup, just make it full brightness
	 */
	if (dev_priv->backlight_duty_cycle == 0)
		dev_priv->backlight_duty_cycle =
			intel_lvds_get_max_backlight(dev);
}

static void intel_lvds_restore(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
	I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON);
	I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF);
	I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
	I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
	if (dev_priv->savePP_CONTROL & POWER_TARGET_ON)
		intel_lvds_set_power(dev, true);
	else
		intel_lvds_set_power(dev, false);
}

static int intel_lvds_mode_valid(struct drm_connector *connector,
				 struct drm_display_mode *mode)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode;

	if (fixed_mode)	{
		if (mode->hdisplay > fixed_mode->hdisplay)
			return MODE_PANEL;
		if (mode->vdisplay > fixed_mode->vdisplay)
			return MODE_PANEL;
	}

	return MODE_OK;
}

static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
				  struct drm_display_mode *mode,
				  struct drm_display_mode *adjusted_mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
	struct drm_encoder *tmp_encoder;

	/* Should never happen!! */
	if (!IS_I965G(dev) && intel_crtc->pipe == 0) {
		printk(KERN_ERR "Can't support LVDS on pipe A\n");
		return false;
	}

	/* Should never happen!! */
	list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
		if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
			printk(KERN_ERR "Can't enable LVDS and another "
			       "encoder on the same pipe\n");
			return false;
		}
	}

	/*
	 * If we have timings from the BIOS for the panel, put them in
	 * to the adjusted mode.  The CRTC will be set up for this mode,
	 * with the panel scaling set up to source from the H/VDisplay
	 * of the original mode.
	 */
	if (dev_priv->panel_fixed_mode != NULL) {
		adjusted_mode->hdisplay = dev_priv->panel_fixed_mode->hdisplay;
		adjusted_mode->hsync_start =
			dev_priv->panel_fixed_mode->hsync_start;
		adjusted_mode->hsync_end =
			dev_priv->panel_fixed_mode->hsync_end;
		adjusted_mode->htotal = dev_priv->panel_fixed_mode->htotal;
		adjusted_mode->vdisplay = dev_priv->panel_fixed_mode->vdisplay;
		adjusted_mode->vsync_start =
			dev_priv->panel_fixed_mode->vsync_start;
		adjusted_mode->vsync_end =
			dev_priv->panel_fixed_mode->vsync_end;
		adjusted_mode->vtotal = dev_priv->panel_fixed_mode->vtotal;
		adjusted_mode->clock = dev_priv->panel_fixed_mode->clock;
		drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
	}

	/*
	 * XXX: It would be nice to support lower refresh rates on the
	 * panels to reduce power consumption, and perhaps match the
	 * user's requested refresh rate.
	 */

	return true;
}

static void intel_lvds_prepare(struct drm_encoder *encoder)
{
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
	dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
				       BACKLIGHT_DUTY_CYCLE_MASK);

	intel_lvds_set_power(dev, false);
}

static void intel_lvds_commit( struct drm_encoder *encoder)
{
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;

	if (dev_priv->backlight_duty_cycle == 0)
		dev_priv->backlight_duty_cycle =
			intel_lvds_get_max_backlight(dev);

	intel_lvds_set_power(dev, true);
}

static void intel_lvds_mode_set(struct drm_encoder *encoder,
				struct drm_display_mode *mode,
				struct drm_display_mode *adjusted_mode)
{
	struct drm_device *dev = encoder->dev;
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
	u32 pfit_control;

	/*
	 * The LVDS pin pair will already have been turned on in the
	 * intel_crtc_mode_set since it has a large impact on the DPLL
	 * settings.
	 */

	/*
	 * Enable automatic panel scaling so that non-native modes fill the
	 * screen.  Should be enabled before the pipe is enabled, according to
	 * register description and PRM.
	 */
	if (mode->hdisplay != adjusted_mode->hdisplay ||
	    mode->vdisplay != adjusted_mode->vdisplay)
		pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
				HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
				HORIZ_INTERP_BILINEAR);
	else
		pfit_control = 0;

	if (!IS_I965G(dev)) {
		if (dev_priv->panel_wants_dither || dev_priv->lvds_dither)
			pfit_control |= PANEL_8TO6_DITHER_ENABLE;
	}
	else
		pfit_control |= intel_crtc->pipe << PFIT_PIPE_SHIFT;

	I915_WRITE(PFIT_CONTROL, pfit_control);
}

/**
 * Detect the LVDS connection.
 *
 * This always returns CONNECTOR_STATUS_CONNECTED.  This connector should only have
 * been set up if the LVDS was actually connected anyway.
 */
static enum drm_connector_status intel_lvds_detect(struct drm_connector *connector)
{
	return connector_status_connected;
}

/**
 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
 */
static int intel_lvds_get_modes(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct intel_output *intel_output = to_intel_output(connector);
	struct drm_i915_private *dev_priv = dev->dev_private;
	int ret = 0;

	ret = intel_ddc_get_modes(intel_output);

	if (ret)
		return ret;

	/* Didn't get an EDID, so
	 * Set wide sync ranges so we get all modes
	 * handed to valid_mode for checking
	 */
	connector->display_info.min_vfreq = 0;
	connector->display_info.max_vfreq = 200;
	connector->display_info.min_hfreq = 0;
	connector->display_info.max_hfreq = 200;

	if (dev_priv->panel_fixed_mode != NULL) {
		struct drm_display_mode *mode;

		mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
		drm_mode_probed_add(connector, mode);

		return 1;
	}

	return 0;
}

/**
 * intel_lvds_destroy - unregister and free LVDS structures
 * @connector: connector to free
 *
 * Unregister the DDC bus for this connector then free the driver private
 * structure.
 */
static void intel_lvds_destroy(struct drm_connector *connector)
{
	struct intel_output *intel_output = to_intel_output(connector);

	if (intel_output->ddc_bus)
		intel_i2c_destroy(intel_output->ddc_bus);
	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(connector);
}

static int intel_lvds_set_property(struct drm_connector *connector,
				   struct drm_property *property,
				   uint64_t value)
{
	struct drm_device *dev = connector->dev;

	if (property == dev->mode_config.dpms_property && connector->encoder)
		intel_lvds_dpms(connector->encoder, (uint32_t)(value & 0xf));

	return 0;
}

static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
	.dpms = intel_lvds_dpms,
	.mode_fixup = intel_lvds_mode_fixup,
	.prepare = intel_lvds_prepare,
	.mode_set = intel_lvds_mode_set,
	.commit = intel_lvds_commit,
};

static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
	.get_modes = intel_lvds_get_modes,
	.mode_valid = intel_lvds_mode_valid,
	.best_encoder = intel_best_encoder,
};

static const struct drm_connector_funcs intel_lvds_connector_funcs = {
	.save = intel_lvds_save,
	.restore = intel_lvds_restore,
	.detect = intel_lvds_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.set_property = intel_lvds_set_property,
	.destroy = intel_lvds_destroy,
};


static void intel_lvds_enc_destroy(struct drm_encoder *encoder)
{
	drm_encoder_cleanup(encoder);
}

static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
	.destroy = intel_lvds_enc_destroy,
};

static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
{
	DRM_DEBUG("Skipping LVDS initialization for %s\n", id->ident);
	return 1;
}

/* These systems claim to have LVDS, but really don't */
static const struct dmi_system_id __initdata intel_no_lvds[] = {
	{
		.callback = intel_no_lvds_dmi_callback,
		.ident = "Apple Mac Mini (Core series)",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
		},
	},
	{
		.callback = intel_no_lvds_dmi_callback,
		.ident = "Apple Mac Mini (Core 2 series)",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
		},
	},
	{
		.callback = intel_no_lvds_dmi_callback,
		.ident = "MSI IM-945GSE-A",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
			DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
		},
	},
	{
		.callback = intel_no_lvds_dmi_callback,
		.ident = "Dell Studio Hybrid",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
			DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
		},
	},

	/* FIXME: add a check for the Aopen Mini PC */

	{ }	/* terminating entry */
};

/**
 * intel_lvds_init - setup LVDS connectors on this device
 * @dev: drm device
 *
 * Create the connector, register the LVDS DDC bus, and try to figure out what
 * modes we can display on the LVDS panel (if present).
 */
void intel_lvds_init(struct drm_device *dev)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct intel_output *intel_output;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	struct drm_display_mode *scan; /* *modes, *bios_mode; */
	struct drm_crtc *crtc;
	u32 lvds;
	int pipe;

	/* Skip init on machines we know falsely report LVDS */
	if (dmi_check_system(intel_no_lvds))
		return;

	intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
	if (!intel_output) {
		return;
	}

	connector = &intel_output->base;
	encoder = &intel_output->enc;
	drm_connector_init(dev, &intel_output->base, &intel_lvds_connector_funcs,
			   DRM_MODE_CONNECTOR_LVDS);

	drm_encoder_init(dev, &intel_output->enc, &intel_lvds_enc_funcs,
			 DRM_MODE_ENCODER_LVDS);

	drm_mode_connector_attach_encoder(&intel_output->base, &intel_output->enc);
	intel_output->type = INTEL_OUTPUT_LVDS;

	drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
	drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
	connector->interlace_allowed = false;
	connector->doublescan_allowed = false;


	/*
	 * LVDS discovery:
	 * 1) check for EDID on DDC
	 * 2) check for VBT data
	 * 3) check to see if LVDS is already on
	 *    if none of the above, no panel
	 * 4) make sure lid is open
	 *    if closed, act like it's not there for now
	 */

	/* Set up the DDC bus. */
	intel_output->ddc_bus = intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
	if (!intel_output->ddc_bus) {
		dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
			   "failed.\n");
		goto failed;
	}

	/*
	 * Attempt to get the fixed panel mode from DDC.  Assume that the
	 * preferred mode is the right one.
	 */
	intel_ddc_get_modes(intel_output);

	list_for_each_entry(scan, &connector->probed_modes, head) {
		mutex_lock(&dev->mode_config.mutex);
		if (scan->type & DRM_MODE_TYPE_PREFERRED) {
			dev_priv->panel_fixed_mode =
				drm_mode_duplicate(dev, scan);
			mutex_unlock(&dev->mode_config.mutex);
			goto out;
		}
		mutex_unlock(&dev->mode_config.mutex);
	}

	/* Failed to get EDID, what about VBT? */
	if (dev_priv->lfp_lvds_vbt_mode) {
		mutex_lock(&dev->mode_config.mutex);
		dev_priv->panel_fixed_mode =
			drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
		mutex_unlock(&dev->mode_config.mutex);
		if (dev_priv->panel_fixed_mode) {
			dev_priv->panel_fixed_mode->type |=
				DRM_MODE_TYPE_PREFERRED;
			goto out;
		}
	}

	/*
	 * 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);
}
Commit	Line	Data
79e53945 JB	1	/*
	2	* Copyright © 2006-2007 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	*/
	29
565dcd46	30	#include <linux/dmi.h>
79e53945 JB	31	#include <linux/i2c.h>
	32	#include "drmP.h"
	33	#include "drm.h"
	34	#include "drm_crtc.h"
	35	#include "drm_edid.h"
	36	#include "intel_drv.h"
	37	#include "i915_drm.h"
	38	#include "i915_drv.h"
	39
	40	/**
	41	* Sets the backlight level.
	42	*
	43	* \param level backlight level, from 0 to intel_lvds_get_max_backlight().
	44	*/
	45	static void intel_lvds_set_backlight(struct drm_device *dev, int level)
	46	{
	47	struct drm_i915_private *dev_priv = dev->dev_private;
	48	u32 blc_pwm_ctl;
	49
	50	blc_pwm_ctl = I915_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
	51	I915_WRITE(BLC_PWM_CTL, (blc_pwm_ctl \|
	52	(level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
	53	}
	54
	55	/**
	56	* Returns the maximum level of the backlight duty cycle field.
	57	*/
	58	static u32 intel_lvds_get_max_backlight(struct drm_device *dev)
	59	{
	60	struct drm_i915_private *dev_priv = dev->dev_private;
	61
	62	return ((I915_READ(BLC_PWM_CTL) & BACKLIGHT_MODULATION_FREQ_MASK) >>
	63	BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
	64	}
	65
	66	/**
	67	* Sets the power state for the panel.
	68	*/
	69	static void intel_lvds_set_power(struct drm_device *dev, bool on)
	70	{
	71	struct drm_i915_private *dev_priv = dev->dev_private;
	72	u32 pp_status;
	73
	74	if (on) {
	75	I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) \|
	76	POWER_TARGET_ON);
	77	do {
	78	pp_status = I915_READ(PP_STATUS);
	79	} while ((pp_status & PP_ON) == 0);
	80
	81	intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle);
	82	} else {
	83	intel_lvds_set_backlight(dev, 0);
	84
	85	I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) &
	86	~POWER_TARGET_ON);
	87	do {
	88	pp_status = I915_READ(PP_STATUS);
	89	} while (pp_status & PP_ON);
	90	}
	91	}
	92
	93	static void intel_lvds_dpms(struct drm_encoder *encoder, int mode)
	94	{
95	struct drm_device *dev = encoder->dev;
96
97	if (mode == DRM_MODE_DPMS_ON)
98	intel_lvds_set_power(dev, true);
99	else
100	intel_lvds_set_power(dev, false);
101
102	/* XXX: We never power down the LVDS pairs. */
103	}
104
105	static void intel_lvds_save(struct drm_connector *connector)
106	{
107	struct drm_device *dev = connector->dev;
108	struct drm_i915_private *dev_priv = dev->dev_private;
109
110	dev_priv->savePP_ON = I915_READ(PP_ON_DELAYS);
111	dev_priv->savePP_OFF = I915_READ(PP_OFF_DELAYS);
112	dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
113	dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
114	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
115	dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
116	BACKLIGHT_DUTY_CYCLE_MASK);
117
118	/*
119	* If the light is off at server startup, just make it full brightness
120	*/
121	if (dev_priv->backlight_duty_cycle == 0)
122	dev_priv->backlight_duty_cycle =
123	intel_lvds_get_max_backlight(dev);
124	}
125
126	static void intel_lvds_restore(struct drm_connector *connector)
127	{
128	struct drm_device *dev = connector->dev;
129	struct drm_i915_private *dev_priv = dev->dev_private;
130
131	I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
132	I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON);
133	I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF);
134	I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
135	I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
136	if (dev_priv->savePP_CONTROL & POWER_TARGET_ON)
137	intel_lvds_set_power(dev, true);
138	else
139	intel_lvds_set_power(dev, false);
140	}
141
142	static int intel_lvds_mode_valid(struct drm_connector *connector,
143	struct drm_display_mode *mode)
144	{
145	struct drm_device *dev = connector->dev;
146	struct drm_i915_private *dev_priv = dev->dev_private;
147	struct drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode;
148
149	if (fixed_mode) {
150	if (mode->hdisplay > fixed_mode->hdisplay)
151	return MODE_PANEL;
152	if (mode->vdisplay > fixed_mode->vdisplay)
153	return MODE_PANEL;
154	}
155
156	return MODE_OK;
157	}
158
159	static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
160	struct drm_display_mode *mode,
161	struct drm_display_mode *adjusted_mode)
162	{
163	struct drm_device *dev = encoder->dev;
164	struct drm_i915_private *dev_priv = dev->dev_private;
165	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
166	struct drm_encoder *tmp_encoder;
167
168	/* Should never happen!! */
169	if (!IS_I965G(dev) && intel_crtc->pipe == 0) {
170	printk(KERN_ERR "Can't support LVDS on pipe A\n");
171	return false;
172	}
173
174	/* Should never happen!! */
175	list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) {
176	if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) {
177	printk(KERN_ERR "Can't enable LVDS and another "
178	"encoder on the same pipe\n");
179	return false;
180	}
181	}
182
183	/*
184	* If we have timings from the BIOS for the panel, put them in
185	* to the adjusted mode. The CRTC will be set up for this mode,
186	* with the panel scaling set up to source from the H/VDisplay
187	* of the original mode.
188	*/
189	if (dev_priv->panel_fixed_mode != NULL) {
190	adjusted_mode->hdisplay = dev_priv->panel_fixed_mode->hdisplay;
191	adjusted_mode->hsync_start =
192	dev_priv->panel_fixed_mode->hsync_start;
193	adjusted_mode->hsync_end =
194	dev_priv->panel_fixed_mode->hsync_end;
195	adjusted_mode->htotal = dev_priv->panel_fixed_mode->htotal;
196	adjusted_mode->vdisplay = dev_priv->panel_fixed_mode->vdisplay;
197	adjusted_mode->vsync_start =
198	dev_priv->panel_fixed_mode->vsync_start;
199	adjusted_mode->vsync_end =
200	dev_priv->panel_fixed_mode->vsync_end;
201	adjusted_mode->vtotal = dev_priv->panel_fixed_mode->vtotal;
202	adjusted_mode->clock = dev_priv->panel_fixed_mode->clock;
203	drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
204	}
205
206	/*
207	* XXX: It would be nice to support lower refresh rates on the
208	* panels to reduce power consumption, and perhaps match the
209	* user's requested refresh rate.
210	*/
211
212	return true;
213	}
214
215	static void intel_lvds_prepare(struct drm_encoder *encoder)
216	{
217	struct drm_device *dev = encoder->dev;
218	struct drm_i915_private *dev_priv = dev->dev_private;
219
220	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
221	dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
222	BACKLIGHT_DUTY_CYCLE_MASK);
223
224	intel_lvds_set_power(dev, false);
225	}
226
227	static void intel_lvds_commit( struct drm_encoder *encoder)
228	{
229	struct drm_device *dev = encoder->dev;
230	struct drm_i915_private *dev_priv = dev->dev_private;
231
232	if (dev_priv->backlight_duty_cycle == 0)
233	dev_priv->backlight_duty_cycle =
234	intel_lvds_get_max_backlight(dev);
235
236	intel_lvds_set_power(dev, true);
237	}
238
239	static void intel_lvds_mode_set(struct drm_encoder *encoder,
240	struct drm_display_mode *mode,
241	struct drm_display_mode *adjusted_mode)
242	{
243	struct drm_device *dev = encoder->dev;
244	struct drm_i915_private *dev_priv = dev->dev_private;
245	struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
246	u32 pfit_control;
247
248	/*
249	* The LVDS pin pair will already have been turned on in the
250	* intel_crtc_mode_set since it has a large impact on the DPLL
251	* settings.
252	*/
253
254	/*
255	* Enable automatic panel scaling so that non-native modes fill the
256	* screen. Should be enabled before the pipe is enabled, according to
257	* register description and PRM.
258	*/
259	if (mode->hdisplay != adjusted_mode->hdisplay \|\|
260	mode->vdisplay != adjusted_mode->vdisplay)
261	pfit_control = (PFIT_ENABLE \| VERT_AUTO_SCALE \|
262	HORIZ_AUTO_SCALE \| VERT_INTERP_BILINEAR \|
263	HORIZ_INTERP_BILINEAR);
264	else
265	pfit_control = 0;
266
267	if (!IS_I965G(dev)) {
2b5cde2b	268	if (dev_priv->panel_wants_dither \|\| dev_priv->lvds_dither)
79e53945 JB	269	pfit_control \|= PANEL_8TO6_DITHER_ENABLE;
	270	}
	271	else
	272	pfit_control \|= intel_crtc->pipe << PFIT_PIPE_SHIFT;
	273
	274	I915_WRITE(PFIT_CONTROL, pfit_control);
	275	}
	276
	277	/**
	278	* Detect the LVDS connection.
	279	*
	280	* This always returns CONNECTOR_STATUS_CONNECTED. This connector should only have
	281	* been set up if the LVDS was actually connected anyway.
	282	*/
	283	static enum drm_connector_status intel_lvds_detect(struct drm_connector *connector)
	284	{
	285	return connector_status_connected;
	286	}
	287
	288	/**
	289	* Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
	290	*/
	291	static int intel_lvds_get_modes(struct drm_connector *connector)
	292	{
	293	struct drm_device *dev = connector->dev;
	294	struct intel_output *intel_output = to_intel_output(connector);
	295	struct drm_i915_private *dev_priv = dev->dev_private;
	296	int ret = 0;
	297
	298	ret = intel_ddc_get_modes(intel_output);
	299
	300	if (ret)
	301	return ret;
	302
	303	/* Didn't get an EDID, so
	304	* Set wide sync ranges so we get all modes
	305	* handed to valid_mode for checking
	306	*/
	307	connector->display_info.min_vfreq = 0;
	308	connector->display_info.max_vfreq = 200;
	309	connector->display_info.min_hfreq = 0;
	310	connector->display_info.max_hfreq = 200;
	311
	312	if (dev_priv->panel_fixed_mode != NULL) {
	313	struct drm_display_mode *mode;
	314
79e53945 JB	315	mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
79e53945 JB	316	drm_mode_probed_add(connector, mode);
79e53945 JB	317
	318	return 1;
	319	}
	320
	321	return 0;
	322	}
	323
	324	/**
	325	* intel_lvds_destroy - unregister and free LVDS structures
	326	* @connector: connector to free
	327	*
	328	* Unregister the DDC bus for this connector then free the driver private
	329	* structure.
	330	*/
	331	static void intel_lvds_destroy(struct drm_connector *connector)
	332	{
	333	struct intel_output *intel_output = to_intel_output(connector);
	334
	335	if (intel_output->ddc_bus)
	336	intel_i2c_destroy(intel_output->ddc_bus);
	337	drm_sysfs_connector_remove(connector);
	338	drm_connector_cleanup(connector);
	339	kfree(connector);
	340	}
	341
335041ed JB	342	static int intel_lvds_set_property(struct drm_connector *connector,
	343	struct drm_property *property,
	344	uint64_t value)
	345	{
	346	struct drm_device *dev = connector->dev;
	347
	348	if (property == dev->mode_config.dpms_property && connector->encoder)
	349	intel_lvds_dpms(connector->encoder, (uint32_t)(value & 0xf));
	350
	351	return 0;
	352	}
	353
79e53945 JB	354	static const struct drm_encoder_helper_funcs intel_lvds_helper_funcs = {
	355	.dpms = intel_lvds_dpms,
	356	.mode_fixup = intel_lvds_mode_fixup,
	357	.prepare = intel_lvds_prepare,
	358	.mode_set = intel_lvds_mode_set,
	359	.commit = intel_lvds_commit,
	360	};
	361
	362	static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
	363	.get_modes = intel_lvds_get_modes,
	364	.mode_valid = intel_lvds_mode_valid,
	365	.best_encoder = intel_best_encoder,
	366	};
	367
	368	static const struct drm_connector_funcs intel_lvds_connector_funcs = {
	369	.save = intel_lvds_save,
	370	.restore = intel_lvds_restore,
	371	.detect = intel_lvds_detect,
	372	.fill_modes = drm_helper_probe_single_connector_modes,
335041ed	373	.set_property = intel_lvds_set_property,
79e53945 JB	374	.destroy = intel_lvds_destroy,
	375	};
	376
	377
	378	static void intel_lvds_enc_destroy(struct drm_encoder *encoder)
	379	{
	380	drm_encoder_cleanup(encoder);
	381	}
	382
	383	static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
	384	.destroy = intel_lvds_enc_destroy,
	385	};
	386
425d244c JW	387	static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
	388	{
	389	DRM_DEBUG("Skipping LVDS initialization for %s\n", id->ident);
	390	return 1;
	391	}
79e53945	392
425d244c JW	393	/* These systems claim to have LVDS, but really don't */
	394	static const struct dmi_system_id __initdata intel_no_lvds[] = {
	395	{
	396	.callback = intel_no_lvds_dmi_callback,
	397	.ident = "Apple Mac Mini (Core series)",
	398	.matches = {
	399	DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
	400	DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
	401	},
	402	},
	403	{
	404	.callback = intel_no_lvds_dmi_callback,
	405	.ident = "Apple Mac Mini (Core 2 series)",
	406	.matches = {
	407	DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
	408	DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
	409	},
	410	},
	411	{
	412	.callback = intel_no_lvds_dmi_callback,
	413	.ident = "MSI IM-945GSE-A",
	414	.matches = {
	415	DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
	416	DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
	417	},
	418	},
	419	{
	420	.callback = intel_no_lvds_dmi_callback,
	421	.ident = "Dell Studio Hybrid",
	422	.matches = {
	423	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
	424	DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
	425	},
	426	},
	427
	428	/* FIXME: add a check for the Aopen Mini PC */
	429
	430	{ } /* terminating entry */
	431	};
79e53945 JB	432
	433	/**
	434	* intel_lvds_init - setup LVDS connectors on this device
	435	* @dev: drm device
	436	*
	437	* Create the connector, register the LVDS DDC bus, and try to figure out what
	438	* modes we can display on the LVDS panel (if present).
	439	*/
	440	void intel_lvds_init(struct drm_device *dev)
	441	{
	442	struct drm_i915_private *dev_priv = dev->dev_private;
	443	struct intel_output *intel_output;
	444	struct drm_connector *connector;
	445	struct drm_encoder *encoder;
	446	struct drm_display_mode scan; / modes, bios_mode; */
	447	struct drm_crtc *crtc;
	448	u32 lvds;
	449	int pipe;
	450
425d244c JW	451	/* Skip init on machines we know falsely report LVDS */
425d244c JW	452	if (dmi_check_system(intel_no_lvds))
565dcd46	453	return;
565dcd46	454
79e53945 JB	455	intel_output = kzalloc(sizeof(struct intel_output), GFP_KERNEL);
	456	if (!intel_output) {
	457	return;
	458	}
	459
	460	connector = &intel_output->base;
	461	encoder = &intel_output->enc;
	462	drm_connector_init(dev, &intel_output->base, &intel_lvds_connector_funcs,
	463	DRM_MODE_CONNECTOR_LVDS);
	464
	465	drm_encoder_init(dev, &intel_output->enc, &intel_lvds_enc_funcs,
	466	DRM_MODE_ENCODER_LVDS);
	467
	468	drm_mode_connector_attach_encoder(&intel_output->base, &intel_output->enc);
	469	intel_output->type = INTEL_OUTPUT_LVDS;
	470
	471	drm_encoder_helper_add(encoder, &intel_lvds_helper_funcs);
	472	drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
	473	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
	474	connector->interlace_allowed = false;
	475	connector->doublescan_allowed = false;
	476
	477
	478	/*
	479	* LVDS discovery:
	480	* 1) check for EDID on DDC
	481	* 2) check for VBT data
	482	* 3) check to see if LVDS is already on
	483	* if none of the above, no panel
	484	* 4) make sure lid is open
	485	* if closed, act like it's not there for now
	486	*/
	487
	488	/* Set up the DDC bus. */
	489	intel_output->ddc_bus = intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
	490	if (!intel_output->ddc_bus) {
	491	dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
	492	"failed.\n");
	493	goto failed;
	494	}
	495
	496	/*
	497	* Attempt to get the fixed panel mode from DDC. Assume that the
	498	* preferred mode is the right one.
	499	*/
	500	intel_ddc_get_modes(intel_output);
	501
	502	list_for_each_entry(scan, &connector->probed_modes, head) {
	503	mutex_lock(&dev->mode_config.mutex);
	504	if (scan->type & DRM_MODE_TYPE_PREFERRED) {
	505	dev_priv->panel_fixed_mode =
	506	drm_mode_duplicate(dev, scan);
	507	mutex_unlock(&dev->mode_config.mutex);
565dcd46	508	goto out;
79e53945 JB	509	}
	510	mutex_unlock(&dev->mode_config.mutex);
	511	}
	512
	513	/* Failed to get EDID, what about VBT? */
88631706	514	if (dev_priv->lfp_lvds_vbt_mode) {
79e53945 JB	515	mutex_lock(&dev->mode_config.mutex);
79e53945 JB	516	dev_priv->panel_fixed_mode =
88631706	517	drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
79e53945	518	mutex_unlock(&dev->mode_config.mutex);
e285f3cd JB	519	if (dev_priv->panel_fixed_mode) {
	520	dev_priv->panel_fixed_mode->type \|=
	521	DRM_MODE_TYPE_PREFERRED;
e285f3cd JB	522	goto out;
e285f3cd JB	523	}
79e53945 JB	524	}
	525
	526	/*
	527	* If we didn't get EDID, try checking if the panel is already turned
	528	* on. If so, assume that whatever is currently programmed is the
	529	* correct mode.
	530	*/
	531	lvds = I915_READ(LVDS);
	532	pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
	533	crtc = intel_get_crtc_from_pipe(dev, pipe);
	534
	535	if (crtc && (lvds & LVDS_PORT_EN)) {
	536	dev_priv->panel_fixed_mode = intel_crtc_mode_get(dev, crtc);
	537	if (dev_priv->panel_fixed_mode) {
	538	dev_priv->panel_fixed_mode->type \|=
	539	DRM_MODE_TYPE_PREFERRED;
565dcd46	540	goto out;
79e53945 JB	541	}
	542	}
	543
	544	/* If we still don't have a mode after all that, give up. */
	545	if (!dev_priv->panel_fixed_mode)
	546	goto failed;
	547
79e53945 JB	548	out:
	549	drm_sysfs_connector_add(connector);
	550	return;
	551
	552	failed:
	553	DRM_DEBUG("No LVDS modes found, disabling.\n");
	554	if (intel_output->ddc_bus)
	555	intel_i2c_destroy(intel_output->ddc_bus);
	556	drm_connector_cleanup(connector);
	557	kfree(connector);
	558	}