/* * Copyright © 2006-2007 Intel Corporation * Copyright (c) 2006 Dave Airlie * * 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 * Dave Airlie * Jesse Barnes */ #include #include #include #include #include #include #include #include "intel_drv.h" #include #include "i915_drv.h" #include /* 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); u32 tmp; 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; /* gen2/3 store dither state in pfit control, needs to match */ if (INTEL_INFO(dev)->gen < 4) { tmp = I915_READ(PFIT_CONTROL); pipe_config->gmch_pfit.control |= tmp & PANEL_8TO6_DITHER_ENABLE; } 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; } /* The LVDS pin pair needs to be on before the DPLLs are enabled. * This is an exception to the general rule that mode_set doesn't turn * things on. */ 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; } static void intel_lvds_mode_set(struct intel_encoder *encoder) { /* * We don't do anything here, the LVDS port is fully set up in the pre * enable hook - the ordering constraints for enabling the lvds port vs. * enabling the display pll are too strict. */ } /** * 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, drm_get_connector_name(connector)); 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 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->mode_set = intel_lvds_mode_set; 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_attach_encoder(intel_connector, intel_encoder); intel_encoder->type = INTEL_OUTPUT_LVDS; intel_encoder->cloneable = false; 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. */ 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) { intel_connector->panel.downclock_mode = intel_find_panel_downclock(dev, fixed_mode, connector); if (intel_connector->panel.downclock_mode != NULL && i915_lvds_downclock) { /* We found the downclock for LVDS. */ dev_priv->lvds_downclock_avail = true; dev_priv->lvds_downclock = intel_connector->panel. 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: 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); intel_panel_setup_backlight(connector); return; failed: DRM_DEBUG_KMS("No LVDS modes found, disabling.\n"); drm_connector_cleanup(connector); drm_encoder_cleanup(encoder); if (fixed_mode) drm_mode_destroy(dev, fixed_mode); kfree(lvds_encoder); kfree(lvds_connector); return; }