| /* |
| * 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_enable(struct intel_lvds *intel_lvds) |
| { |
| 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; |
| } |
| |
| I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN); |
| |
| if (intel_lvds->pfit_dirty) { |
| /* |
| * Enable automatic panel scaling so that non-native modes |
| * fill the screen. The panel fitter should only be |
| * adjusted whilst the pipe is disabled, 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"); |
| } else { |
| I915_WRITE(PFIT_PGM_RATIOS, intel_lvds->pfit_pgm_ratios); |
| I915_WRITE(PFIT_CONTROL, intel_lvds->pfit_control); |
| intel_lvds->pfit_dirty = false; |
| } |
| } |
| |
| I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON); |
| POSTING_READ(lvds_reg); |
| |
| intel_panel_enable_backlight(dev); |
| } |
| |
| static void intel_lvds_disable(struct intel_lvds *intel_lvds) |
| { |
| 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; |
| } |
| |
| intel_panel_disable_backlight(dev); |
| |
| 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_dirty = true; |
| } |
| |
| 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_enable(intel_lvds); |
| else |
| intel_lvds_disable(intel_lvds); |
| |
| /* 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; |
| int pipe; |
| |
| /* 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; |
| } |
| |
| /* 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 |
| */ |
| for_each_pipe(pipe) |
| I915_WRITE(BCLRPAT(pipe), 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; |
| |
| /* 965+ is easy, it does everything in hw */ |
| if (scaled_width > scaled_height) |
| pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR; |
| else if (scaled_width < scaled_height) |
| pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER; |
| else if (adjusted_mode->hdisplay != mode->hdisplay) |
| pfit_control |= PFIT_ENABLE | 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. |
| */ |
| if (mode->vdisplay != adjusted_mode->vdisplay || |
| mode->hdisplay != adjusted_mode->hdisplay) { |
| pfit_control |= PFIT_ENABLE; |
| if (INTEL_INFO(dev)->gen >= 4) |
| pfit_control |= PFIT_SCALING_AUTO; |
| else |
| pfit_control |= (VERT_AUTO_SCALE | |
| VERT_INTERP_BILINEAR | |
| HORIZ_AUTO_SCALE | |
| HORIZ_INTERP_BILINEAR); |
| } |
| break; |
| |
| default: |
| break; |
| } |
| |
| out: |
| /* If not enabling scaling, be consistent and always use 0. */ |
| if ((pfit_control & PFIT_ENABLE) == 0) { |
| pfit_control = 0; |
| pfit_pgm_ratios = 0; |
| } |
| |
| /* Make sure pre-965 set dither correctly */ |
| if (INTEL_INFO(dev)->gen < 4 && dev_priv->lvds_dither) |
| pfit_control |= PANEL_8TO6_DITHER_ENABLE; |
| |
| 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); |
| |
| /* 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); |
| |
| /* 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_enable(intel_lvds); |
| } |
| |
| static void intel_lvds_mode_set(struct drm_encoder *encoder, |
| struct drm_display_mode *mode, |
| struct drm_display_mode *adjusted_mode) |
| { |
| /* |
| * 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. |
| */ |
| } |
| |
| /** |
| * 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; |
| |
| 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 *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 == 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_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; |
| |
| if (dev->switch_power_state != DRM_SWITCH_POWER_ON) |
| return NOTIFY_OK; |
| |
| /* |
| * 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 i915GMm-HFS", |
| .matches = { |
| DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"), |
| DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"), |
| }, |
| }, |
| { |
| .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; |
| } |
| |
| /** |
| * 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). |
| */ |
| bool 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 false; |
| |
| pin = GMBUS_PORT_PANEL; |
| if (!lvds_is_present_in_vbt(dev, &pin)) { |
| DRM_DEBUG_KMS("LVDS is not present in VBT\n"); |
| return false; |
| } |
| |
| if (HAS_PCH_SPLIT(dev)) { |
| if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0) |
| return false; |
| if (dev_priv->edp.support) { |
| DRM_DEBUG_KMS("disable LVDS for eDP support\n"); |
| return false; |
| } |
| } |
| |
| intel_lvds = kzalloc(sizeof(struct intel_lvds), GFP_KERNEL); |
| if (!intel_lvds) { |
| return false; |
| } |
| |
| intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); |
| if (!intel_connector) { |
| kfree(intel_lvds); |
| return false; |
| } |
| |
| 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); |
| if (INTEL_INFO(dev)->gen >= 5) |
| intel_encoder->crtc_mask |= (1 << 0); |
| 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; |
| |
| pipe = (I915_READ(PCH_LVDS) & LVDS_PIPEB_SELECT) ? 1 : 0; |
| |
| /* make sure PWM is enabled and locked to the LVDS pipe */ |
| pwm = I915_READ(BLC_PWM_CPU_CTL2); |
| if (pipe == 0 && (pwm & PWM_PIPE_B)) |
| I915_WRITE(BLC_PWM_CPU_CTL2, pwm & ~PWM_ENABLE); |
| if (pipe) |
| pwm |= PWM_PIPE_B; |
| else |
| pwm &= ~PWM_PIPE_B; |
| I915_WRITE(BLC_PWM_CPU_CTL2, pwm | PWM_ENABLE); |
| |
| 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 true; |
| |
| failed: |
| DRM_DEBUG_KMS("No LVDS modes found, disabling.\n"); |
| drm_connector_cleanup(connector); |
| drm_encoder_cleanup(encoder); |
| kfree(intel_lvds); |
| kfree(intel_connector); |
| return false; |
| } |