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linux/drivers/gpu/drm/i915/intel_lvds.c

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/*
* 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 <acpi/button.h>
#include <linux/dmi.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include "intel_drv.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include <linux/acpi.h>
/* Private structure for the integrated LVDS support */
struct intel_lvds_connector {
struct intel_connector base;
struct notifier_block lid_notifier;
};
struct intel_lvds_encoder {
struct intel_encoder base;
bool is_dual_link;
u32 reg;
struct intel_lvds_connector *attached_connector;
};
static struct intel_lvds_encoder *to_lvds_encoder(struct drm_encoder *encoder)
{
return container_of(encoder, struct intel_lvds_encoder, base.base);
}
static struct intel_lvds_connector *to_lvds_connector(struct drm_connector *connector)
{
return container_of(connector, struct intel_lvds_connector, base.base);
}
static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
enum pipe *pipe)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
enum intel_display_power_domain power_domain;
u32 tmp;
power_domain = intel_display_port_power_domain(encoder);
if (!intel_display_power_enabled(dev_priv, power_domain))
return false;
tmp = I915_READ(lvds_encoder->reg);
if (!(tmp & LVDS_PORT_EN))
return false;
if (HAS_PCH_CPT(dev))
*pipe = PORT_TO_PIPE_CPT(tmp);
else
*pipe = PORT_TO_PIPE(tmp);
return true;
}
static void intel_lvds_get_config(struct intel_encoder *encoder,
struct intel_crtc_config *pipe_config)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 lvds_reg, tmp, flags = 0;
int dotclock;
if (HAS_PCH_SPLIT(dev))
lvds_reg = PCH_LVDS;
else
lvds_reg = LVDS;
tmp = I915_READ(lvds_reg);
if (tmp & LVDS_HSYNC_POLARITY)
flags |= DRM_MODE_FLAG_NHSYNC;
else
flags |= DRM_MODE_FLAG_PHSYNC;
if (tmp & LVDS_VSYNC_POLARITY)
flags |= DRM_MODE_FLAG_NVSYNC;
else
flags |= DRM_MODE_FLAG_PVSYNC;
pipe_config->adjusted_mode.flags |= flags;
dotclock = pipe_config->port_clock;
if (HAS_PCH_SPLIT(dev_priv->dev))
ironlake_check_encoder_dotclock(pipe_config, dotclock);
pipe_config->adjusted_mode.crtc_clock = dotclock;
}
static void intel_pre_enable_lvds(struct intel_encoder *encoder)
{
struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
const struct drm_display_mode *adjusted_mode =
&crtc->config.adjusted_mode;
int pipe = crtc->pipe;
u32 temp;
if (HAS_PCH_SPLIT(dev)) {
assert_fdi_rx_pll_disabled(dev_priv, pipe);
assert_shared_dpll_disabled(dev_priv,
intel_crtc_to_shared_dpll(crtc));
} else {
assert_pll_disabled(dev_priv, pipe);
}
temp = I915_READ(lvds_encoder->reg);
temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
if (HAS_PCH_CPT(dev)) {
temp &= ~PORT_TRANS_SEL_MASK;
temp |= PORT_TRANS_SEL_CPT(pipe);
} else {
if (pipe == 1) {
temp |= LVDS_PIPEB_SELECT;
} else {
temp &= ~LVDS_PIPEB_SELECT;
}
}
/* set the corresponsding LVDS_BORDER bit */
temp &= ~LVDS_BORDER_ENABLE;
temp |= crtc->config.gmch_pfit.lvds_border_bits;
/* Set the B0-B3 data pairs corresponding to whether we're going to
* set the DPLLs for dual-channel mode or not.
*/
if (lvds_encoder->is_dual_link)
temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
else
temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
/* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
* appropriately here, but we need to look more thoroughly into how
* panels behave in the two modes.
*/
/* Set the dithering flag on LVDS as needed, note that there is no
* special lvds dither control bit on pch-split platforms, dithering is
* only controlled through the PIPECONF reg. */
if (INTEL_INFO(dev)->gen == 4) {
/* Bspec wording suggests that LVDS port dithering only exists
* for 18bpp panels. */
if (crtc->config.dither && crtc->config.pipe_bpp == 18)
temp |= LVDS_ENABLE_DITHER;
else
temp &= ~LVDS_ENABLE_DITHER;
}
temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
temp |= LVDS_HSYNC_POLARITY;
if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
temp |= LVDS_VSYNC_POLARITY;
I915_WRITE(lvds_encoder->reg, temp);
}
/**
* Sets the power state for the panel.
*/
static void intel_enable_lvds(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
struct intel_connector *intel_connector =
&lvds_encoder->attached_connector->base;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 ctl_reg, stat_reg;
if (HAS_PCH_SPLIT(dev)) {
ctl_reg = PCH_PP_CONTROL;
stat_reg = PCH_PP_STATUS;
} else {
ctl_reg = PP_CONTROL;
stat_reg = PP_STATUS;
}
I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN);
I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
POSTING_READ(lvds_encoder->reg);
if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
DRM_ERROR("timed out waiting for panel to power on\n");
intel_panel_enable_backlight(intel_connector);
}
static void intel_disable_lvds(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
struct intel_connector *intel_connector =
&lvds_encoder->attached_connector->base;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 ctl_reg, stat_reg;
if (HAS_PCH_SPLIT(dev)) {
ctl_reg = PCH_PP_CONTROL;
stat_reg = PCH_PP_STATUS;
} else {
ctl_reg = PP_CONTROL;
stat_reg = PP_STATUS;
}
intel_panel_disable_backlight(intel_connector);
I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON);
if (wait_for((I915_READ(stat_reg) & PP_ON) == 0, 1000))
DRM_ERROR("timed out waiting for panel to power off\n");
I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN);
POSTING_READ(lvds_encoder->reg);
}
static enum drm_mode_status
intel_lvds_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct drm_display_mode *fixed_mode = intel_connector->panel.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_compute_config(struct intel_encoder *intel_encoder,
struct intel_crtc_config *pipe_config)
{
struct drm_device *dev = intel_encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_lvds_encoder *lvds_encoder =
to_lvds_encoder(&intel_encoder->base);
struct intel_connector *intel_connector =
&lvds_encoder->attached_connector->base;
struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
struct intel_crtc *intel_crtc = lvds_encoder->base.new_crtc;
unsigned int lvds_bpp;
/* Should never happen!! */
if (INTEL_INFO(dev)->gen < 4 && intel_crtc->pipe == 0) {
DRM_ERROR("Can't support LVDS on pipe A\n");
return false;
}
if ((I915_READ(lvds_encoder->reg) & LVDS_A3_POWER_MASK) ==
LVDS_A3_POWER_UP)
lvds_bpp = 8*3;
else
lvds_bpp = 6*3;
if (lvds_bpp != pipe_config->pipe_bpp && !pipe_config->bw_constrained) {
DRM_DEBUG_KMS("forcing display bpp (was %d) to LVDS (%d)\n",
pipe_config->pipe_bpp, lvds_bpp);
pipe_config->pipe_bpp = lvds_bpp;
}
/*
* 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.
*/
intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
adjusted_mode);
if (HAS_PCH_SPLIT(dev)) {
pipe_config->has_pch_encoder = true;
intel_pch_panel_fitting(intel_crtc, pipe_config,
intel_connector->panel.fitting_mode);
} else {
intel_gmch_panel_fitting(intel_crtc, pipe_config,
intel_connector->panel.fitting_mode);
}
/*
* 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;
}
/**
* Detect the LVDS connection.
*
* Since LVDS doesn't have hotlug, we use the lid as a proxy. Open means
* connected and closed means disconnected. We also send hotplug events as
* needed, using lid status notification from the input layer.
*/
static enum drm_connector_status
intel_lvds_detect(struct drm_connector *connector, bool force)
{
struct drm_device *dev = connector->dev;
enum drm_connector_status status;
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
connector->base.id, connector->name);
status = intel_panel_detect(dev);
if (status != connector_status_unknown)
return status;
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 intel_lvds_connector *lvds_connector = to_lvds_connector(connector);
struct drm_device *dev = connector->dev;
struct drm_display_mode *mode;
/* use cached edid if we have one */
if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
return drm_add_edid_modes(connector, lvds_connector->base.edid);
mode = drm_mode_duplicate(dev, lvds_connector->base.panel.fixed_mode);
if (mode == NULL)
return 0;
drm_mode_probed_add(connector, mode);
return 1;
}
static int intel_no_modeset_on_lid_dmi_callback(const struct dmi_system_id *id)
{
DRM_INFO("Skipping forced modeset for %s\n", id->ident);
return 1;
}
/* The GPU hangs up on these systems if modeset is performed on LID open */
static const struct dmi_system_id intel_no_modeset_on_lid[] = {
{
.callback = intel_no_modeset_on_lid_dmi_callback,
.ident = "Toshiba Tecra A11",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A11"),
},
},
{ } /* terminating entry */
};
/*
* Lid events. Note the use of 'modeset':
* - we set it to MODESET_ON_LID_OPEN on lid close,
* and set it to MODESET_DONE on open
* - we use it as a "only once" bit (ie we ignore
* duplicate events where it was already properly set)
* - the suspend/resume paths will set it to
* MODESET_SUSPENDED and ignore the lid open event,
* because they restore the mode ("lid open").
*/
static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
void *unused)
{
struct intel_lvds_connector *lvds_connector =
container_of(nb, struct intel_lvds_connector, lid_notifier);
struct drm_connector *connector = &lvds_connector->base.base;
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
return NOTIFY_OK;
mutex_lock(&dev_priv->modeset_restore_lock);
if (dev_priv->modeset_restore == MODESET_SUSPENDED)
goto exit;
/*
* check and update the status of LVDS connector after receiving
* the LID nofication event.
*/
connector->status = connector->funcs->detect(connector, false);
/* Don't force modeset on machines where it causes a GPU lockup */
if (dmi_check_system(intel_no_modeset_on_lid))
goto exit;
if (!acpi_lid_open()) {
/* do modeset on next lid open event */
dev_priv->modeset_restore = MODESET_ON_LID_OPEN;
goto exit;
}
if (dev_priv->modeset_restore == MODESET_DONE)
goto exit;
/*
* Some old platform's BIOS love to wreak havoc while the lid is closed.
* We try to detect this here and undo any damage. The split for PCH
* platforms is rather conservative and a bit arbitrary expect that on
* those platforms VGA disabling requires actual legacy VGA I/O access,
* and as part of the cleanup in the hw state restore we also redisable
* the vga plane.
*/
if (!HAS_PCH_SPLIT(dev)) {
drm_modeset_lock_all(dev);
intel_modeset_setup_hw_state(dev, true);
drm_modeset_unlock_all(dev);
}
dev_priv->modeset_restore = MODESET_DONE;
exit:
mutex_unlock(&dev_priv->modeset_restore_lock);
return NOTIFY_OK;
}
/**
* 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_lvds_connector *lvds_connector =
to_lvds_connector(connector);
if (lvds_connector->lid_notifier.notifier_call)
acpi_lid_notifier_unregister(&lvds_connector->lid_notifier);
if (!IS_ERR_OR_NULL(lvds_connector->base.edid))
kfree(lvds_connector->base.edid);
intel_panel_fini(&lvds_connector->base.panel);
drm_connector_cleanup(connector);
kfree(connector);
}
static int intel_lvds_set_property(struct drm_connector *connector,
struct drm_property *property,
uint64_t value)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct drm_device *dev = connector->dev;
if (property == dev->mode_config.scaling_mode_property) {
struct drm_crtc *crtc;
if (value == DRM_MODE_SCALE_NONE) {
DRM_DEBUG_KMS("no scaling not supported\n");
return -EINVAL;
}
if (intel_connector->panel.fitting_mode == value) {
/* the LVDS scaling property is not changed */
return 0;
}
intel_connector->panel.fitting_mode = value;
crtc = intel_attached_encoder(connector)->base.crtc;
if (crtc && crtc->enabled) {
/*
* If the CRTC is enabled, the display will be changed
* according to the new panel fitting mode.
*/
intel_crtc_restore_mode(crtc);
}
}
return 0;
}
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 = {
.dpms = intel_connector_dpms,
.detect = intel_lvds_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = intel_lvds_set_property,
.destroy = intel_lvds_destroy,
};
static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
.destroy = intel_encoder_destroy,
};
static int __init intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
{
DRM_INFO("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 intel_no_lvds[] = {
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Apple Mac Mini (Core series)",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
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"),
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"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Dell OptiPlex FX170",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "AOpen Mini PC",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "AOpen Mini PC MP915",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "AOpen i915GMm-HFS",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "AOpen i45GMx-I",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Aopen i945GTt-VFA",
.matches = {
DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Clientron U800",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Clientron E830",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Asus EeeBox PC EB1007",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Asus AT5NM10T-I",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Hewlett-Packard HP t5740",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Hewlett-Packard t5745",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Hewlett-Packard st5747",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "MSI Wind Box DC500",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Gigabyte GA-D525TUD",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Supermicro X7SPA-H",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Fujitsu Esprimo Q900",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Intel D410PT",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
DMI_MATCH(DMI_BOARD_NAME, "D410PT"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Intel D425KT",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Intel D510MO",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Intel D525MW",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
},
},
{ } /* terminating entry */
};
/*
* Enumerate the child dev array parsed from VBT to check whether
* the LVDS is present.
* If it is present, return 1.
* If it is not present, return false.
* If no child dev is parsed from VBT, it assumes that the LVDS is present.
*/
static bool lvds_is_present_in_vbt(struct drm_device *dev,
u8 *i2c_pin)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
if (!dev_priv->vbt.child_dev_num)
return true;
for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
union child_device_config *uchild = dev_priv->vbt.child_dev + i;
struct old_child_dev_config *child = &uchild->old;
/* If the device type is not LFP, continue.
* We have to check both the new identifiers as well as the
* old for compatibility with some BIOSes.
*/
if (child->device_type != DEVICE_TYPE_INT_LFP &&
child->device_type != DEVICE_TYPE_LFP)
continue;
if (intel_gmbus_is_port_valid(child->i2c_pin))
*i2c_pin = child->i2c_pin;
/* However, we cannot trust the BIOS writers to populate
* the VBT correctly. Since LVDS requires additional
* information from AIM blocks, a non-zero addin offset is
* a good indicator that the LVDS is actually present.
*/
if (child->addin_offset)
return true;
/* But even then some BIOS writers perform some black magic
* and instantiate the device without reference to any
* additional data. Trust that if the VBT was written into
* the OpRegion then they have validated the LVDS's existence.
*/
if (dev_priv->opregion.vbt)
return true;
}
return false;
}
static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
{
DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
return 1;
}
static const struct dmi_system_id intel_dual_link_lvds[] = {
{
.callback = intel_dual_link_lvds_callback,
.ident = "Apple MacBook Pro (Core i5/i7 Series)",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
},
},
{ } /* terminating entry */
};
bool intel_is_dual_link_lvds(struct drm_device *dev)
{
struct intel_encoder *encoder;
struct intel_lvds_encoder *lvds_encoder;
list_for_each_entry(encoder, &dev->mode_config.encoder_list,
base.head) {
if (encoder->type == INTEL_OUTPUT_LVDS) {
lvds_encoder = to_lvds_encoder(&encoder->base);
return lvds_encoder->is_dual_link;
}
}
return false;
}
static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
{
struct drm_device *dev = lvds_encoder->base.base.dev;
unsigned int val;
struct drm_i915_private *dev_priv = dev->dev_private;
/* use the module option value if specified */
if (i915.lvds_channel_mode > 0)
return i915.lvds_channel_mode == 2;
if (dmi_check_system(intel_dual_link_lvds))
return true;
/* BIOS should set the proper LVDS register value at boot, but
* in reality, it doesn't set the value when the lid is closed;
* we need to check "the value to be set" in VBT when LVDS
* register is uninitialized.
*/
val = I915_READ(lvds_encoder->reg);
if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
val = dev_priv->vbt.bios_lvds_val;
return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
}
static bool intel_lvds_supported(struct drm_device *dev)
{
/* With the introduction of the PCH we gained a dedicated
* LVDS presence pin, use it. */
if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
return true;
/* Otherwise LVDS was only attached to mobile products,
* except for the inglorious 830gm */
if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
return true;
return false;
}
/**
* 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_lvds_encoder *lvds_encoder;
struct intel_encoder *intel_encoder;
struct intel_lvds_connector *lvds_connector;
struct intel_connector *intel_connector;
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_display_mode *scan; /* *modes, *bios_mode; */
struct drm_display_mode *fixed_mode = NULL;
struct drm_display_mode *downclock_mode = NULL;
struct edid *edid;
struct drm_crtc *crtc;
u32 lvds;
int pipe;
u8 pin;
if (!intel_lvds_supported(dev))
return;
/* Skip init on machines we know falsely report LVDS */
if (dmi_check_system(intel_no_lvds))
return;
pin = GMBUS_PORT_PANEL;
if (!lvds_is_present_in_vbt(dev, &pin)) {
DRM_DEBUG_KMS("LVDS is not present in VBT\n");
return;
}
if (HAS_PCH_SPLIT(dev)) {
if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
return;
if (dev_priv->vbt.edp_support) {
DRM_DEBUG_KMS("disable LVDS for eDP support\n");
return;
}
}
lvds_encoder = kzalloc(sizeof(*lvds_encoder), GFP_KERNEL);
if (!lvds_encoder)
return;
lvds_connector = kzalloc(sizeof(*lvds_connector), GFP_KERNEL);
if (!lvds_connector) {
kfree(lvds_encoder);
return;
}
lvds_encoder->attached_connector = lvds_connector;
intel_encoder = &lvds_encoder->base;
encoder = &intel_encoder->base;
intel_connector = &lvds_connector->base;
connector = &intel_connector->base;
drm_connector_init(dev, &intel_connector->base, &intel_lvds_connector_funcs,
DRM_MODE_CONNECTOR_LVDS);
drm_encoder_init(dev, &intel_encoder->base, &intel_lvds_enc_funcs,
DRM_MODE_ENCODER_LVDS);
intel_encoder->enable = intel_enable_lvds;
intel_encoder->pre_enable = intel_pre_enable_lvds;
intel_encoder->compute_config = intel_lvds_compute_config;
intel_encoder->disable = intel_disable_lvds;
intel_encoder->get_hw_state = intel_lvds_get_hw_state;
intel_encoder->get_config = intel_lvds_get_config;
intel_connector->get_hw_state = intel_connector_get_hw_state;
intel_connector->unregister = intel_connector_unregister;
intel_connector_attach_encoder(intel_connector, intel_encoder);
intel_encoder->type = INTEL_OUTPUT_LVDS;
intel_encoder->cloneable = 0;
if (HAS_PCH_SPLIT(dev))
intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
else if (IS_GEN4(dev))
intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
else
intel_encoder->crtc_mask = (1 << 1);
drm_connector_helper_add(connector, &intel_lvds_connector_helper_funcs);
connector->display_info.subpixel_order = SubPixelHorizontalRGB;
connector->interlace_allowed = false;
connector->doublescan_allowed = false;
if (HAS_PCH_SPLIT(dev)) {
lvds_encoder->reg = PCH_LVDS;
} else {
lvds_encoder->reg = LVDS;
}
/* create the scaling mode property */
drm_mode_create_scaling_mode_property(dev);
drm_object_attach_property(&connector->base,
dev->mode_config.scaling_mode_property,
DRM_MODE_SCALE_ASPECT);
intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
/*
* 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
*/
/*
* Attempt to get the fixed panel mode from DDC. Assume that the
* preferred mode is the right one.
*/
mutex_lock(&dev->mode_config.mutex);
edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, pin));
if (edid) {
if (drm_add_edid_modes(connector, edid)) {
drm_mode_connector_update_edid_property(connector,
edid);
} else {
kfree(edid);
edid = ERR_PTR(-EINVAL);
}
} else {
edid = ERR_PTR(-ENOENT);
}
lvds_connector->base.edid = edid;
if (IS_ERR_OR_NULL(edid)) {
/* 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;
}
list_for_each_entry(scan, &connector->probed_modes, head) {
if (scan->type & DRM_MODE_TYPE_PREFERRED) {
DRM_DEBUG_KMS("using preferred mode from EDID: ");
drm_mode_debug_printmodeline(scan);
fixed_mode = drm_mode_duplicate(dev, scan);
if (fixed_mode) {
downclock_mode =
intel_find_panel_downclock(dev,
fixed_mode, connector);
if (downclock_mode != NULL &&
i915.lvds_downclock) {
/* We found the downclock for LVDS. */
dev_priv->lvds_downclock_avail = true;
dev_priv->lvds_downclock =
downclock_mode->clock;
DRM_DEBUG_KMS("LVDS downclock is found"
" in EDID. Normal clock %dKhz, "
"downclock %dKhz\n",
fixed_mode->clock,
dev_priv->lvds_downclock);
}
goto out;
}
}
}
/* Failed to get EDID, what about VBT? */
if (dev_priv->vbt.lfp_lvds_vbt_mode) {
DRM_DEBUG_KMS("using mode from VBT: ");
drm_mode_debug_printmodeline(dev_priv->vbt.lfp_lvds_vbt_mode);
fixed_mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode);
if (fixed_mode) {
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.
*/
/* Ironlake: FIXME if still fail, not try pipe mode now */
if (HAS_PCH_SPLIT(dev))
goto failed;
lvds = I915_READ(LVDS);
pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
crtc = intel_get_crtc_for_pipe(dev, pipe);
if (crtc && (lvds & LVDS_PORT_EN)) {
fixed_mode = intel_crtc_mode_get(dev, crtc);
if (fixed_mode) {
DRM_DEBUG_KMS("using current (BIOS) mode: ");
drm_mode_debug_printmodeline(fixed_mode);
fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
goto out;
}
}
/* If we still don't have a mode after all that, give up. */
if (!fixed_mode)
goto failed;
out:
mutex_unlock(&dev->mode_config.mutex);
lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
lvds_encoder->is_dual_link ? "dual" : "single");
/*
* Unlock registers and just
* leave them unlocked
*/
if (HAS_PCH_SPLIT(dev)) {
I915_WRITE(PCH_PP_CONTROL,
I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
} else {
I915_WRITE(PP_CONTROL,
I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
}
lvds_connector->lid_notifier.notifier_call = intel_lid_notify;
if (acpi_lid_notifier_register(&lvds_connector->lid_notifier)) {
DRM_DEBUG_KMS("lid notifier registration failed\n");
lvds_connector->lid_notifier.notifier_call = NULL;
}
drm_sysfs_connector_add(connector);
intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode);
intel_panel_setup_backlight(connector);
return;
failed:
mutex_unlock(&dev->mode_config.mutex);
DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
drm_connector_cleanup(connector);
drm_encoder_cleanup(encoder);
kfree(lvds_encoder);
kfree(lvds_connector);
return;
}
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