diff options
Diffstat (limited to 'linux-core/intel_lvds.c')
| -rw-r--r-- | linux-core/intel_lvds.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/linux-core/intel_lvds.c b/linux-core/intel_lvds.c new file mode 100644 index 00000000..942eb2ab --- /dev/null +++ b/linux-core/intel_lvds.c @@ -0,0 +1,502 @@ +/* + * Copyright © 2006-2007 Intel Corporation + * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Authors: + * Eric Anholt <eric@anholt.net> + * Dave Airlie <airlied@linux.ie> + * Jesse Barnes <jesse.barnes@intel.com> + */ + +#include <linux/i2c.h> +#include "drmP.h" +#include "drm.h" +#include "drm_crtc.h" +#include "drm_edid.h" +#include "intel_drv.h" +#include "i915_drm.h" +#include "i915_drv.h" + +/** + * Sets the backlight level. + * + * \param level backlight level, from 0 to intel_lvds_get_max_backlight(). + */ +static void intel_lvds_set_backlight(struct drm_device *dev, int level) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + u32 blc_pwm_ctl; + + blc_pwm_ctl = I915_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; + I915_WRITE(BLC_PWM_CTL, (blc_pwm_ctl | + (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); +} + +/** + * Returns the maximum level of the backlight duty cycle field. + */ +static u32 intel_lvds_get_max_backlight(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + + return ((I915_READ(BLC_PWM_CTL) & BACKLIGHT_MODULATION_FREQ_MASK) >> + BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; +} + +/** + * Sets the power state for the panel. + */ +static void intel_lvds_set_power(struct drm_device *dev, bool on) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + u32 pp_status; + + if (on) { + I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) | + POWER_TARGET_ON); + do { + pp_status = I915_READ(PP_STATUS); + } while ((pp_status & PP_ON) == 0); + + intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle); + } else { + intel_lvds_set_backlight(dev, 0); + + I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & + ~POWER_TARGET_ON); + do { + pp_status = I915_READ(PP_STATUS); + } while (pp_status & PP_ON); + } +} + +static void intel_lvds_dpms(struct drm_output *output, int mode) +{ + struct drm_device *dev = output->dev; + + if (mode == DPMSModeOn) + intel_lvds_set_power(dev, true); + else + intel_lvds_set_power(dev, false); + + /* XXX: We never power down the LVDS pairs. */ +} + +static void intel_lvds_save(struct drm_output *output) +{ + struct drm_device *dev = output->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + + dev_priv->savePP_ON = I915_READ(LVDSPP_ON); + dev_priv->savePP_OFF = I915_READ(LVDSPP_OFF); + dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL); + dev_priv->savePP_CYCLE = I915_READ(PP_CYCLE); + dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL); + dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL & + BACKLIGHT_DUTY_CYCLE_MASK); + + /* + * If the light is off at server startup, just make it full brightness + */ + if (dev_priv->backlight_duty_cycle == 0) + dev_priv->backlight_duty_cycle = + intel_lvds_get_max_backlight(dev); +} + +static void intel_lvds_restore(struct drm_output *output) +{ + struct drm_device *dev = output->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + + I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL); + I915_WRITE(LVDSPP_ON, dev_priv->savePP_ON); + I915_WRITE(LVDSPP_OFF, dev_priv->savePP_OFF); + I915_WRITE(PP_CYCLE, dev_priv->savePP_CYCLE); + I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL); + if (dev_priv->savePP_CONTROL & POWER_TARGET_ON) + intel_lvds_set_power(dev, true); + else + intel_lvds_set_power(dev, false); +} + +static int intel_lvds_mode_valid(struct drm_output *output, + struct drm_display_mode *mode) +{ + struct drm_device *dev = output->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + struct drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode; + + if (fixed_mode) { + if (mode->hdisplay > fixed_mode->hdisplay) + return MODE_PANEL; + if (mode->vdisplay > fixed_mode->vdisplay) + return MODE_PANEL; + } + + return MODE_OK; +} + +static bool intel_lvds_mode_fixup(struct drm_output *output, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct drm_device *dev = output->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + struct intel_crtc *intel_crtc = output->crtc->driver_private; + struct drm_output *tmp_output; + + /* Should never happen!! */ + if (!IS_I965G(dev) && intel_crtc->pipe == 0) { + printk(KERN_ERR "Can't support LVDS on pipe A\n"); + return false; + } + + /* Should never happen!! */ + list_for_each_entry(tmp_output, &dev->mode_config.output_list, head) { + if (tmp_output != output && tmp_output->crtc == output->crtc) { + printk(KERN_ERR "Can't enable LVDS and another " + "output on the same pipe\n"); + return false; + } + } + + /* + * If we have timings from the BIOS for the panel, put them in + * to the adjusted mode. The CRTC will be set up for this mode, + * with the panel scaling set up to source from the H/VDisplay + * of the original mode. + */ + if (dev_priv->panel_fixed_mode != NULL) { + adjusted_mode->hdisplay = dev_priv->panel_fixed_mode->hdisplay; + adjusted_mode->hsync_start = + dev_priv->panel_fixed_mode->hsync_start; + adjusted_mode->hsync_end = + dev_priv->panel_fixed_mode->hsync_end; + adjusted_mode->htotal = dev_priv->panel_fixed_mode->htotal; + adjusted_mode->vdisplay = dev_priv->panel_fixed_mode->vdisplay; + adjusted_mode->vsync_start = + dev_priv->panel_fixed_mode->vsync_start; + adjusted_mode->vsync_end = + dev_priv->panel_fixed_mode->vsync_end; + adjusted_mode->vtotal = dev_priv->panel_fixed_mode->vtotal; + adjusted_mode->clock = dev_priv->panel_fixed_mode->clock; + drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); + } + + /* + * XXX: It would be nice to support lower refresh rates on the + * panels to reduce power consumption, and perhaps match the + * user's requested refresh rate. + */ + + return true; +} + +static void intel_lvds_prepare(struct drm_output *output) +{ + struct drm_device *dev = output->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + + dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL); + dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL & + BACKLIGHT_DUTY_CYCLE_MASK); + + intel_lvds_set_power(dev, false); +} + +static void intel_lvds_commit( struct drm_output *output) +{ + struct drm_device *dev = output->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + + if (dev_priv->backlight_duty_cycle == 0) + dev_priv->backlight_duty_cycle = + intel_lvds_get_max_backlight(dev); + + intel_lvds_set_power(dev, true); +} + +static void intel_lvds_mode_set(struct drm_output *output, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct drm_device *dev = output->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + struct intel_crtc *intel_crtc = output->crtc->driver_private; + u32 pfit_control; + + /* + * The LVDS pin pair will already have been turned on in the + * intel_crtc_mode_set since it has a large impact on the DPLL + * settings. + */ + + /* + * Enable automatic panel scaling so that non-native modes fill the + * screen. Should be enabled before the pipe is enabled, according to + * register description and PRM. + */ + pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | + VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); + + if (!IS_I965G(dev)) { + if (dev_priv->panel_wants_dither) + pfit_control |= PANEL_8TO6_DITHER_ENABLE; + } + else + pfit_control |= intel_crtc->pipe << PFIT_PIPE_SHIFT; + + I915_WRITE(PFIT_CONTROL, pfit_control); +} + +/** + * Detect the LVDS connection. + * + * This always returns OUTPUT_STATUS_CONNECTED. This output should only have + * been set up if the LVDS was actually connected anyway. + */ +static enum drm_output_status intel_lvds_detect(struct drm_output *output) +{ + return output_status_connected; +} + +/** + * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. + */ +static int intel_lvds_get_modes(struct drm_output *output) +{ + struct drm_device *dev = output->dev; + drm_i915_private_t *dev_priv = dev->dev_private; + int ret = 0; + + ret = intel_ddc_get_modes(output); + + if (ret) + return ret; + + /* Didn't get an EDID */ + if (!output->monitor_info) { + struct drm_display_info *dspinfo; + dspinfo = kzalloc(sizeof(*output->monitor_info), GFP_KERNEL); + if (!dspinfo) + goto out; + + /* Set wide sync ranges so we get all modes + * handed to valid_mode for checking + */ + dspinfo->min_vfreq = 0; + dspinfo->max_vfreq = 200; + dspinfo->min_hfreq = 0; + dspinfo->max_hfreq = 200; + output->monitor_info = dspinfo; + } + +out: + if (dev_priv->panel_fixed_mode != NULL) { + struct drm_display_mode *mode = + drm_mode_duplicate(dev, dev_priv->panel_fixed_mode); + drm_mode_probed_add(output, mode); + return 1; + } + + return 0; +} + +/** + * intel_lvds_destroy - unregister and free LVDS structures + * @output: output to free + * + * Unregister the DDC bus for this output then free the driver private + * structure. + */ +static void intel_lvds_destroy(struct drm_output *output) +{ + struct intel_output *intel_output = output->driver_private; + + intel_i2c_destroy(intel_output->ddc_bus); + kfree(output->driver_private); +} + +static const struct drm_output_funcs intel_lvds_output_funcs = { + .dpms = intel_lvds_dpms, + .save = intel_lvds_save, + .restore = intel_lvds_restore, + .mode_valid = intel_lvds_mode_valid, + .mode_fixup = intel_lvds_mode_fixup, + .prepare = intel_lvds_prepare, + .mode_set = intel_lvds_mode_set, + .commit = intel_lvds_commit, + .detect = intel_lvds_detect, + .get_modes = intel_lvds_get_modes, + .cleanup = intel_lvds_destroy +}; + +/** + * intel_lvds_init - setup LVDS outputs on this device + * @dev: drm device + * + * Create the output, 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) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + struct drm_output *output; + struct intel_output *intel_output; + struct drm_display_mode *scan; /* *modes, *bios_mode; */ + struct drm_crtc *crtc; + u32 lvds; + int pipe; + + output = drm_output_create(dev, &intel_lvds_output_funcs, "LVDS"); + if (!output) + return; + + intel_output = kmalloc(sizeof(struct intel_output), GFP_KERNEL); + if (!intel_output) { + drm_output_destroy(output); + return; + } + + intel_output->type = INTEL_OUTPUT_LVDS; + output->driver_private = intel_output; + output->subpixel_order = SubPixelHorizontalRGB; + output->interlace_allowed = FALSE; + output->doublescan_allowed = FALSE; + + /* Set up the DDC bus. */ + intel_output->ddc_bus = intel_i2c_create(dev, GPIOC, "LVDSDDC_C"); + if (!intel_output->ddc_bus) { + dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration " + "failed.\n"); + return; + } + + /* + * Attempt to get the fixed panel mode from DDC. Assume that the + * preferred mode is the right one. + */ + intel_ddc_get_modes(output); + + list_for_each_entry(scan, &output->probed_modes, head) { + if (scan->type & DRM_MODE_TYPE_PREFERRED) { + dev_priv->panel_fixed_mode = + drm_mode_duplicate(dev, scan); + goto out; /* FIXME: check for quirks */ + } + } + + /* + * If we didn't get EDID, try checking if the panel is already turned + * on. If so, assume that whatever is currently programmed is the + * correct mode. + */ + lvds = I915_READ(LVDS); + pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; + crtc = intel_get_crtc_from_pipe(dev, pipe); + + if (crtc && (lvds & LVDS_PORT_EN)) { + dev_priv->panel_fixed_mode = intel_crtc_mode_get(dev, crtc); + if (dev_priv->panel_fixed_mode) { + dev_priv->panel_fixed_mode->type |= + DRM_MODE_TYPE_PREFERRED; + goto out; /* FIXME: check for quirks */ + } + } + + /* If we still don't have a mode after all that, give up. */ + if (!dev_priv->panel_fixed_mode) + goto failed; + + /* FIXME: probe the BIOS for modes and check for LVDS quirks */ +#if 0 + /* Get the LVDS fixed mode out of the BIOS. We should support LVDS + * with the BIOS being unavailable or broken, but lack the + * configuration options for now. + */ + bios_mode = intel_bios_get_panel_mode(pScrn); + if (bios_mode != NULL) { + if (dev_priv->panel_fixed_mode != NULL) { + if (dev_priv->debug_modes && + !xf86ModesEqual(dev_priv->panel_fixed_mode, + bios_mode)) + { + xf86DrvMsg(pScrn->scrnIndex, X_WARNING, + "BIOS panel mode data doesn't match probed data, " + "continuing with probed.\n"); + xf86DrvMsg(pScrn->scrnIndex, X_INFO, "BIOS mode:\n"); + xf86PrintModeline(pScrn->scrnIndex, bios_mode); + xf86DrvMsg(pScrn->scrnIndex, X_INFO, "probed mode:\n"); + xf86PrintModeline(pScrn->scrnIndex, dev_priv->panel_fixed_mode); + xfree(bios_mode->name); + xfree(bios_mode); + } + } else { + dev_priv->panel_fixed_mode = bios_mode; + } + } else { + xf86DrvMsg(pScrn->scrnIndex, X_WARNING, + "Couldn't detect panel mode. Disabling panel\n"); + goto disable_exit; + } + + /* + * Blacklist machines with BIOSes that list an LVDS panel without + * actually having one. + */ + if (dev_priv->PciInfo->chipType == PCI_CHIP_I945_GM) { + /* aopen mini pc */ + if (dev_priv->PciInfo->subsysVendor == 0xa0a0) + goto disable_exit; + + if ((dev_priv->PciInfo->subsysVendor == 0x8086) && + (dev_priv->PciInfo->subsysCard == 0x7270)) { + /* It's a Mac Mini or Macbook Pro. + * + * Apple hardware is out to get us. The macbook pro + * has a real LVDS panel, but the mac mini does not, + * and they have the same device IDs. We'll + * distinguish by panel size, on the assumption + * that Apple isn't about to make any machines with an + * 800x600 display. + */ + + if (dev_priv->panel_fixed_mode != NULL && + dev_priv->panel_fixed_mode->HDisplay == 800 && + dev_priv->panel_fixed_mode->VDisplay == 600) + { + xf86DrvMsg(pScrn->scrnIndex, X_INFO, + "Suspected Mac Mini, ignoring the LVDS\n"); + goto disable_exit; + } + } + } + +#endif + +out: + return; + +failed: + DRM_DEBUG("No LVDS modes found, disabling.\n"); + drm_output_destroy(output); /* calls intel_lvds_destroy above */ +} |