/* * 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 "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" #include <linux/acpi.h> /* Private structure for the integrated LVDS support */ struct intel_lvds { struct intel_encoder base; struct edid *edid; int fitting_mode; u32 pfit_control; u32 pfit_pgm_ratios; bool pfit_dirty; struct drm_display_mode *fixed_mode; }; static struct intel_lvds *to_intel_lvds(struct drm_encoder *encoder) { return container_of(encoder, struct intel_lvds, base.base); } static struct intel_lvds *intel_attached_lvds(struct drm_connector *connector) { return container_of(intel_attached_encoder(connector), struct intel_lvds, base); } /** * Sets the power state for the panel. */ static void intel_lvds_set_power(struct intel_lvds *intel_lvds, bool on) { struct drm_device *dev = intel_lvds->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; u32 ctl_reg, lvds_reg; if (HAS_PCH_SPLIT(dev)) { ctl_reg = PCH_PP_CONTROL; lvds_reg = PCH_LVDS; } else { ctl_reg = PP_CONTROL; lvds_reg = LVDS; } if (on) { I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN); I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON); intel_panel_set_backlight(dev, dev_priv->backlight_level); } else { dev_priv->backlight_level = intel_panel_get_backlight(dev); intel_panel_set_backlight(dev, 0); I915_WRITE(ctl_reg, I915_READ(ctl_reg) & ~POWER_TARGET_ON); if (intel_lvds->pfit_control) { if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000)) DRM_ERROR("timed out waiting for panel to power off\n"); I915_WRITE(PFIT_CONTROL, 0); intel_lvds->pfit_control = 0; intel_lvds->pfit_dirty = false; } I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN); } POSTING_READ(lvds_reg); } static void intel_lvds_dpms(struct drm_encoder *encoder, int mode) { struct intel_lvds *intel_lvds = to_intel_lvds(encoder); if (mode == DRM_MODE_DPMS_ON) intel_lvds_set_power(intel_lvds, true); else intel_lvds_set_power(intel_lvds, false); /* XXX: We never power down the LVDS pairs. */ } static int intel_lvds_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { struct intel_lvds *intel_lvds = intel_attached_lvds(connector); struct drm_display_mode *fixed_mode = intel_lvds->fixed_mode; if (mode->hdisplay > fixed_mode->hdisplay) return MODE_PANEL; if (mode->vdisplay > fixed_mode->vdisplay) return MODE_PANEL; return MODE_OK; } static void centre_horizontally(struct drm_display_mode *mode, int width) { u32 border, sync_pos, blank_width, sync_width; /* keep the hsync and hblank widths constant */ sync_width = mode->crtc_hsync_end - mode->crtc_hsync_start; blank_width = mode->crtc_hblank_end - mode->crtc_hblank_start; sync_pos = (blank_width - sync_width + 1) / 2; border = (mode->hdisplay - width + 1) / 2; border += border & 1; /* make the border even */ mode->crtc_hdisplay = width; mode->crtc_hblank_start = width + border; mode->crtc_hblank_end = mode->crtc_hblank_start + blank_width; mode->crtc_hsync_start = mode->crtc_hblank_start + sync_pos; mode->crtc_hsync_end = mode->crtc_hsync_start + sync_width; } static void centre_vertically(struct drm_display_mode *mode, int height) { u32 border, sync_pos, blank_width, sync_width; /* keep the vsync and vblank widths constant */ sync_width = mode->crtc_vsync_end - mode->crtc_vsync_start; blank_width = mode->crtc_vblank_end - mode->crtc_vblank_start; sync_pos = (blank_width - sync_width + 1) / 2; border = (mode->vdisplay - height + 1) / 2; mode->crtc_vdisplay = height; mode->crtc_vblank_start = height + border; mode->crtc_vblank_end = mode->crtc_vblank_start + blank_width; mode->crtc_vsync_start = mode->crtc_vblank_start + sync_pos; mode->crtc_vsync_end = mode->crtc_vsync_start + sync_width; } static inline u32 panel_fitter_scaling(u32 source, u32 target) { /* * Floating point operation is not supported. So the FACTOR * is defined, which can avoid the floating point computation * when calculating the panel ratio. */ #define ACCURACY 12 #define FACTOR (1 << ACCURACY) u32 ratio = source * FACTOR / target; return (FACTOR * ratio + FACTOR/2) / FACTOR; } 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 intel_lvds *intel_lvds = to_intel_lvds(encoder); struct drm_encoder *tmp_encoder; u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0; /* 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; } /* Should never happen!! */ list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list, head) { if (tmp_encoder != encoder && tmp_encoder->crtc == encoder->crtc) { DRM_ERROR("Can't enable LVDS and another " "encoder on the same pipe\n"); return false; } } /* * 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_lvds->fixed_mode, adjusted_mode); if (HAS_PCH_SPLIT(dev)) { intel_pch_panel_fitting(dev, intel_lvds->fitting_mode, mode, adjusted_mode); return true; } /* Make sure pre-965s set dither correctly */ if (INTEL_INFO(dev)->gen < 4) { if (dev_priv->lvds_dither) pfit_control |= PANEL_8TO6_DITHER_ENABLE; } /* Native modes don't need fitting */ if (adjusted_mode->hdisplay == mode->hdisplay && adjusted_mode->vdisplay == mode->vdisplay) goto out; /* 965+ wants fuzzy fitting */ if (INTEL_INFO(dev)->gen >= 4) pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) | PFIT_FILTER_FUZZY); /* * Enable automatic panel scaling for non-native modes so that they fill * the screen. Should be enabled before the pipe is enabled, according * to register description and PRM. * Change the value here to see the borders for debugging */ I915_WRITE(BCLRPAT_A, 0); I915_WRITE(BCLRPAT_B, 0); switch (intel_lvds->fitting_mode) { case DRM_MODE_SCALE_CENTER: /* * For centered modes, we have to calculate border widths & * heights and modify the values programmed into the CRTC. */ centre_horizontally(adjusted_mode, mode->hdisplay); centre_vertically(adjusted_mode, mode->vdisplay); border = LVDS_BORDER_ENABLE; break; case DRM_MODE_SCALE_ASPECT: /* Scale but preserve the aspect ratio */ if (INTEL_INFO(dev)->gen >= 4) { u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay; u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay; pfit_control |= PFIT_ENABLE; /* 965+ is easy, it does everything in hw */ if (scaled_width > scaled_height) pfit_control |= PFIT_SCALING_PILLAR; else if (scaled_width < scaled_height) pfit_control |= PFIT_SCALING_LETTER; else pfit_control |= PFIT_SCALING_AUTO; } else { u32 scaled_width = adjusted_mode->hdisplay * mode->vdisplay; u32 scaled_height = mode->hdisplay * adjusted_mode->vdisplay; /* * For earlier chips we have to calculate the scaling * ratio by hand and program it into the * PFIT_PGM_RATIO register */ if (scaled_width > scaled_height) { /* pillar */ centre_horizontally(adjusted_mode, scaled_height / mode->vdisplay); border = LVDS_BORDER_ENABLE; if (mode->vdisplay != adjusted_mode->vdisplay) { u32 bits = panel_fitter_scaling(mode->vdisplay, adjusted_mode->vdisplay); pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | bits << PFIT_VERT_SCALE_SHIFT); pfit_control |= (PFIT_ENABLE | VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); } } else if (scaled_width < scaled_height) { /* letter */ centre_vertically(adjusted_mode, scaled_width / mode->hdisplay); border = LVDS_BORDER_ENABLE; if (mode->hdisplay != adjusted_mode->hdisplay) { u32 bits = panel_fitter_scaling(mode->hdisplay, adjusted_mode->hdisplay); pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | bits << PFIT_VERT_SCALE_SHIFT); pfit_control |= (PFIT_ENABLE | VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); } } else /* Aspects match, Let hw scale both directions */ pfit_control |= (PFIT_ENABLE | VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); } break; case DRM_MODE_SCALE_FULLSCREEN: /* * Full scaling, even if it changes the aspect ratio. * Fortunately this is all done for us in hw. */ pfit_control |= PFIT_ENABLE; if (INTEL_INFO(dev)->gen >= 4) pfit_control |= PFIT_SCALING_AUTO; else pfit_control |= (VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); break; default: break; } out: if (pfit_control != intel_lvds->pfit_control || pfit_pgm_ratios != intel_lvds->pfit_pgm_ratios) { intel_lvds->pfit_control = pfit_control; intel_lvds->pfit_pgm_ratios = pfit_pgm_ratios; intel_lvds->pfit_dirty = true; } dev_priv->lvds_border_bits = border; /* * 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; struct intel_lvds *intel_lvds = to_intel_lvds(encoder); dev_priv->backlight_level = intel_panel_get_backlight(dev); /* We try to do the minimum that is necessary in order to unlock * the registers for mode setting. * * On Ironlake, this is quite simple as we just set the unlock key * and ignore all subtleties. (This may cause some issues...) * * Prior to Ironlake, we must disable the pipe if we want to adjust * the panel fitter. However at all other times we can just reset * the registers regardless. */ if (HAS_PCH_SPLIT(dev)) { I915_WRITE(PCH_PP_CONTROL, I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS); } else if (intel_lvds->pfit_dirty) { I915_WRITE(PP_CONTROL, (I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS) & ~POWER_TARGET_ON); } else { I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS); } } static void intel_lvds_commit(struct drm_encoder *encoder) { struct drm_device *dev = encoder->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_lvds *intel_lvds = to_intel_lvds(encoder); if (dev_priv->backlight_level == 0) dev_priv->backlight_level = intel_panel_get_max_backlight(dev); /* Undo any unlocking done in prepare to prevent accidental * adjustment of the registers. */ if (HAS_PCH_SPLIT(dev)) { u32 val = I915_READ(PCH_PP_CONTROL); if ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS) I915_WRITE(PCH_PP_CONTROL, val & 0x3); } else { u32 val = I915_READ(PP_CONTROL); if ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS) I915_WRITE(PP_CONTROL, val & 0x3); } /* Always do a full power on as we do not know what state * we were left in. */ intel_lvds_set_power(intel_lvds, 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_lvds *intel_lvds = to_intel_lvds(encoder); /* * 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. */ if (HAS_PCH_SPLIT(dev)) return; if (!intel_lvds->pfit_dirty) return; /* * 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. */ DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n", intel_lvds->pfit_control, intel_lvds->pfit_pgm_ratios); if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000)) DRM_ERROR("timed out waiting for panel to power off\n"); I915_WRITE(PFIT_PGM_RATIOS, intel_lvds->pfit_pgm_ratios); I915_WRITE(PFIT_CONTROL, intel_lvds->pfit_control); intel_lvds->pfit_dirty = false; } /** * 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 = connector_status_connected; /* ACPI lid methods were generally unreliable in this generation, so * don't even bother. */ if (IS_GEN2(dev) || IS_GEN3(dev)) return connector_status_connected; return status; } /** * 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 *intel_lvds = intel_attached_lvds(connector); struct drm_device *dev = connector->dev; struct drm_display_mode *mode; if (intel_lvds->edid) return drm_add_edid_modes(connector, intel_lvds->edid); mode = drm_mode_duplicate(dev, intel_lvds->fixed_mode); if (mode == 0) 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_DEBUG_KMS("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_on_lid': * - we set it on lid close, and reset it on open * - we use it as a "only once" bit (ie we ignore * duplicate events where it was already properly * set/reset) * - the suspend/resume paths will also set it to * zero, since they restore the mode ("lid open"). */ static int intel_lid_notify(struct notifier_block *nb, unsigned long val, void *unused) { struct drm_i915_private *dev_priv = container_of(nb, struct drm_i915_private, lid_notifier); struct drm_device *dev = dev_priv->dev; struct drm_connector *connector = dev_priv->int_lvds_connector; /* * check and update the status of LVDS connector after receiving * the LID nofication event. */ if (connector) 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)) return NOTIFY_OK; if (!acpi_lid_open()) { dev_priv->modeset_on_lid = 1; return NOTIFY_OK; } if (!dev_priv->modeset_on_lid) return NOTIFY_OK; dev_priv->modeset_on_lid = 0; mutex_lock(&dev->mode_config.mutex); drm_helper_resume_force_mode(dev); mutex_unlock(&dev->mode_config.mutex); 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 drm_device *dev = connector->dev; struct drm_i915_private *dev_priv = dev->dev_private; if (dev_priv->lid_notifier.notifier_call) acpi_lid_notifier_unregister(&dev_priv->lid_notifier); 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 intel_lvds *intel_lvds = intel_attached_lvds(connector); struct drm_device *dev = connector->dev; if (property == dev->mode_config.scaling_mode_property) { struct drm_crtc *crtc = intel_lvds->base.base.crtc; if (value == DRM_MODE_SCALE_NONE) { DRM_DEBUG_KMS("no scaling not supported\n"); return -EINVAL; } if (intel_lvds->fitting_mode == value) { /* the LVDS scaling property is not changed */ return 0; } intel_lvds->fitting_mode = value; if (crtc && crtc->enabled) { /* * If the CRTC is enabled, the display will be changed * according to the new panel fitting mode. */ drm_crtc_helper_set_mode(crtc, &crtc->mode, crtc->x, crtc->y, crtc->fb); } } 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 = { .dpms = drm_helper_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_DEBUG_KMS("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 = "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 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"), }, }, { } /* terminating entry */ }; /** * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID * @dev: drm device * @connector: LVDS connector * * Find the reduced downclock for LVDS in EDID. */ static void intel_find_lvds_downclock(struct drm_device *dev, struct drm_display_mode *fixed_mode, struct drm_connector *connector) { struct drm_i915_private *dev_priv = dev->dev_private; struct drm_display_mode *scan; int temp_downclock; temp_downclock = fixed_mode->clock; list_for_each_entry(scan, &connector->probed_modes, head) { /* * If one mode has the same resolution with the fixed_panel * mode while they have the different refresh rate, it means * that the reduced downclock is found for the LVDS. In such * case we can set the different FPx0/1 to dynamically select * between low and high frequency. */ if (scan->hdisplay == fixed_mode->hdisplay && scan->hsync_start == fixed_mode->hsync_start && scan->hsync_end == fixed_mode->hsync_end && scan->htotal == fixed_mode->htotal && scan->vdisplay == fixed_mode->vdisplay && scan->vsync_start == fixed_mode->vsync_start && scan->vsync_end == fixed_mode->vsync_end && scan->vtotal == fixed_mode->vtotal) { if (scan->clock < temp_downclock) { /* * The downclock is already found. But we * expect to find the lower downclock. */ temp_downclock = scan->clock; } } } if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) { /* We found the downclock for LVDS. */ dev_priv->lvds_downclock_avail = 1; dev_priv->lvds_downclock = temp_downclock; DRM_DEBUG_KMS("LVDS downclock is found in EDID. " "Normal clock %dKhz, downclock %dKhz\n", fixed_mode->clock, temp_downclock); } } /* * 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->child_dev_num) return true; for (i = 0; i < dev_priv->child_dev_num; i++) { struct child_device_config *child = dev_priv->child_dev + i; /* 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 (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 bool intel_lvds_ddc_probe(struct drm_device *dev, u8 pin) { struct drm_i915_private *dev_priv = dev->dev_private; u8 buf = 0; struct i2c_msg msgs[] = { { .addr = 0xA0, .flags = 0, .len = 1, .buf = &buf, }, }; struct i2c_adapter *i2c = &dev_priv->gmbus[pin].adapter; /* XXX this only appears to work when using GMBUS */ if (intel_gmbus_is_forced_bit(i2c)) return true; return i2c_transfer(i2c, msgs, 1) == 1; } /** * 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 *intel_lvds; struct intel_encoder *intel_encoder; struct intel_connector *intel_connector; struct drm_connector *connector; struct drm_encoder *encoder; struct drm_display_mode *scan; /* *modes, *bios_mode; */ struct drm_crtc *crtc; u32 lvds; int pipe; u8 pin; /* 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->edp.support) { DRM_DEBUG_KMS("disable LVDS for eDP support\n"); return; } } if (!intel_lvds_ddc_probe(dev, pin)) { DRM_DEBUG_KMS("LVDS did not respond to DDC probe\n"); return; } intel_lvds = kzalloc(sizeof(struct intel_lvds), GFP_KERNEL); if (!intel_lvds) { return; } intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); if (!intel_connector) { kfree(intel_lvds); return; } if (!HAS_PCH_SPLIT(dev)) { intel_lvds->pfit_control = I915_READ(PFIT_CONTROL); } intel_encoder = &intel_lvds->base; encoder = &intel_encoder->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_connector_attach_encoder(intel_connector, intel_encoder); intel_encoder->type = INTEL_OUTPUT_LVDS; intel_encoder->clone_mask = (1 << INTEL_LVDS_CLONE_BIT); intel_encoder->crtc_mask = (1 << 1); 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; /* create the scaling mode property */ drm_mode_create_scaling_mode_property(dev); /* * the initial panel fitting mode will be FULL_SCREEN. */ drm_connector_attach_property(&intel_connector->base, dev->mode_config.scaling_mode_property, DRM_MODE_SCALE_ASPECT); intel_lvds->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. */ intel_lvds->edid = drm_get_edid(connector, &dev_priv->gmbus[pin].adapter); if (intel_lvds->edid) { if (drm_add_edid_modes(connector, intel_lvds->edid)) { drm_mode_connector_update_edid_property(connector, intel_lvds->edid); } else { kfree(intel_lvds->edid); intel_lvds->edid = NULL; } } if (!intel_lvds->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) { intel_lvds->fixed_mode = drm_mode_duplicate(dev, scan); intel_find_lvds_downclock(dev, intel_lvds->fixed_mode, connector); goto out; } } /* Failed to get EDID, what about VBT? */ if (dev_priv->lfp_lvds_vbt_mode) { intel_lvds->fixed_mode = drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); if (intel_lvds->fixed_mode) { intel_lvds->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)) { intel_lvds->fixed_mode = intel_crtc_mode_get(dev, crtc); if (intel_lvds->fixed_mode) { intel_lvds->fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; goto out; } } /* If we still don't have a mode after all that, give up. */ if (!intel_lvds->fixed_mode) goto failed; out: if (HAS_PCH_SPLIT(dev)) { u32 pwm; /* make sure PWM is enabled */ pwm = I915_READ(BLC_PWM_CPU_CTL2); pwm |= (PWM_ENABLE | PWM_PIPE_B); I915_WRITE(BLC_PWM_CPU_CTL2, pwm); pwm = I915_READ(BLC_PWM_PCH_CTL1); pwm |= PWM_PCH_ENABLE; I915_WRITE(BLC_PWM_PCH_CTL1, pwm); } dev_priv->lid_notifier.notifier_call = intel_lid_notify; if (acpi_lid_notifier_register(&dev_priv->lid_notifier)) { DRM_DEBUG_KMS("lid notifier registration failed\n"); dev_priv->lid_notifier.notifier_call = NULL; } /* keep the LVDS connector */ dev_priv->int_lvds_connector = connector; drm_sysfs_connector_add(connector); return; failed: DRM_DEBUG_KMS("No LVDS modes found, disabling.\n"); drm_connector_cleanup(connector); drm_encoder_cleanup(encoder); kfree(intel_lvds); kfree(intel_connector); }