diff options
Diffstat (limited to 'drivers/gpu/drm/gma500/psb_intel_lvds.c')
| -rw-r--r-- | drivers/gpu/drm/gma500/psb_intel_lvds.c | 868 |
1 files changed, 868 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/psb_intel_lvds.c b/drivers/gpu/drm/gma500/psb_intel_lvds.c new file mode 100644 index 0000000..a25e4ca --- /dev/null +++ b/drivers/gpu/drm/gma500/psb_intel_lvds.c @@ -0,0 +1,868 @@ +/* + * Copyright © 2006-2007 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + * Authors: + * Eric Anholt <eric@anholt.net> + * Dave Airlie <airlied@linux.ie> + * Jesse Barnes <jesse.barnes@intel.com> + */ + +#include <linux/i2c.h> +#include <drm/drmP.h> + +#include "intel_bios.h" +#include "psb_drv.h" +#include "psb_intel_drv.h" +#include "psb_intel_reg.h" +#include "power.h" +#include <linux/pm_runtime.h> + +/* + * LVDS I2C backlight control macros + */ +#define BRIGHTNESS_MAX_LEVEL 100 +#define BRIGHTNESS_MASK 0xFF +#define BLC_I2C_TYPE 0x01 +#define BLC_PWM_TYPT 0x02 + +#define BLC_POLARITY_NORMAL 0 +#define BLC_POLARITY_INVERSE 1 + +#define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE) +#define PSB_BLC_MIN_PWM_REG_FREQ (0x2) +#define PSB_BLC_PWM_PRECISION_FACTOR (10) +#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16) +#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE) + +struct psb_intel_lvds_priv { + /* + * Saved LVDO output states + */ + uint32_t savePP_ON; + uint32_t savePP_OFF; + uint32_t saveLVDS; + uint32_t savePP_CONTROL; + uint32_t savePP_CYCLE; + uint32_t savePFIT_CONTROL; + uint32_t savePFIT_PGM_RATIOS; + uint32_t saveBLC_PWM_CTL; + + struct psb_intel_i2c_chan *i2c_bus; + struct psb_intel_i2c_chan *ddc_bus; +}; + + +/* + * Returns the maximum level of the backlight duty cycle field. + */ +static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev) +{ + struct drm_psb_private *dev_priv = dev->dev_private; + u32 ret; + + if (gma_power_begin(dev, false)) { + ret = REG_READ(BLC_PWM_CTL); + gma_power_end(dev); + } else /* Powered off, use the saved value */ + ret = dev_priv->saveBLC_PWM_CTL; + + /* Top 15bits hold the frequency mask */ + ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >> + BACKLIGHT_MODULATION_FREQ_SHIFT; + + ret *= 2; /* Return a 16bit range as needed for setting */ + if (ret == 0) + dev_err(dev->dev, "BL bug: Reg %08x save %08X\n", + REG_READ(BLC_PWM_CTL), dev_priv->saveBLC_PWM_CTL); + return ret; +} + +/* + * Set LVDS backlight level by I2C command + * + * FIXME: at some point we need to both track this for PM and also + * disable runtime pm on MRST if the brightness is nil (ie blanked) + */ +static int psb_lvds_i2c_set_brightness(struct drm_device *dev, + unsigned int level) +{ + struct drm_psb_private *dev_priv = + (struct drm_psb_private *)dev->dev_private; + + struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus; + u8 out_buf[2]; + unsigned int blc_i2c_brightness; + + struct i2c_msg msgs[] = { + { + .addr = lvds_i2c_bus->slave_addr, + .flags = 0, + .len = 2, + .buf = out_buf, + } + }; + + blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level * + BRIGHTNESS_MASK / + BRIGHTNESS_MAX_LEVEL); + + if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) + blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness; + + out_buf[0] = dev_priv->lvds_bl->brightnesscmd; + out_buf[1] = (u8)blc_i2c_brightness; + + if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) { + dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n", + dev_priv->lvds_bl->brightnesscmd, + blc_i2c_brightness); + return 0; + } + + dev_err(dev->dev, "I2C transfer error\n"); + return -1; +} + + +static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level) +{ + struct drm_psb_private *dev_priv = + (struct drm_psb_private *)dev->dev_private; + + u32 max_pwm_blc; + u32 blc_pwm_duty_cycle; + + max_pwm_blc = psb_intel_lvds_get_max_backlight(dev); + + /*BLC_PWM_CTL Should be initiated while backlight device init*/ + BUG_ON(max_pwm_blc == 0); + + blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL; + + if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE) + blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle; + + blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR; + REG_WRITE(BLC_PWM_CTL, + (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | + (blc_pwm_duty_cycle)); + + dev_info(dev->dev, "Backlight lvds set brightness %08x\n", + (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) | + (blc_pwm_duty_cycle)); + + return 0; +} + +/* + * Set LVDS backlight level either by I2C or PWM + */ +void psb_intel_lvds_set_brightness(struct drm_device *dev, int level) +{ + struct drm_psb_private *dev_priv = dev->dev_private; + + dev_dbg(dev->dev, "backlight level is %d\n", level); + + if (!dev_priv->lvds_bl) { + dev_err(dev->dev, "NO LVDS backlight info\n"); + return; + } + + if (dev_priv->lvds_bl->type == BLC_I2C_TYPE) + psb_lvds_i2c_set_brightness(dev, level); + else + psb_lvds_pwm_set_brightness(dev, level); +} + +/* + * Sets the backlight level. + * + * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight(). + */ +static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level) +{ + struct drm_psb_private *dev_priv = dev->dev_private; + u32 blc_pwm_ctl; + + if (gma_power_begin(dev, false)) { + blc_pwm_ctl = REG_READ(BLC_PWM_CTL); + blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK; + REG_WRITE(BLC_PWM_CTL, + (blc_pwm_ctl | + (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); + dev_priv->saveBLC_PWM_CTL = (blc_pwm_ctl | + (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); + gma_power_end(dev); + } else { + blc_pwm_ctl = dev_priv->saveBLC_PWM_CTL & + ~BACKLIGHT_DUTY_CYCLE_MASK; + dev_priv->saveBLC_PWM_CTL = (blc_pwm_ctl | + (level << BACKLIGHT_DUTY_CYCLE_SHIFT)); + } +} + +/* + * Sets the power state for the panel. + */ +static void psb_intel_lvds_set_power(struct drm_device *dev, bool on) +{ + struct drm_psb_private *dev_priv = dev->dev_private; + struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; + u32 pp_status; + + if (!gma_power_begin(dev, true)) { + dev_err(dev->dev, "set power, chip off!\n"); + return; + } + + if (on) { + REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | + POWER_TARGET_ON); + do { + pp_status = REG_READ(PP_STATUS); + } while ((pp_status & PP_ON) == 0); + + psb_intel_lvds_set_backlight(dev, + mode_dev->backlight_duty_cycle); + } else { + psb_intel_lvds_set_backlight(dev, 0); + + REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & + ~POWER_TARGET_ON); + do { + pp_status = REG_READ(PP_STATUS); + } while (pp_status & PP_ON); + } + + gma_power_end(dev); +} + +static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode) +{ + struct drm_device *dev = encoder->dev; + + if (mode == DRM_MODE_DPMS_ON) + psb_intel_lvds_set_power(dev, true); + else + psb_intel_lvds_set_power(dev, false); + + /* XXX: We never power down the LVDS pairs. */ +} + +static void psb_intel_lvds_save(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_psb_private *dev_priv = + (struct drm_psb_private *)dev->dev_private; + struct psb_intel_encoder *psb_intel_encoder = + psb_intel_attached_encoder(connector); + struct psb_intel_lvds_priv *lvds_priv = + (struct psb_intel_lvds_priv *)psb_intel_encoder->dev_priv; + + lvds_priv->savePP_ON = REG_READ(LVDSPP_ON); + lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF); + lvds_priv->saveLVDS = REG_READ(LVDS); + lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL); + lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE); + /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/ + lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); + lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL); + lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS); + + /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/ + 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 = + psb_intel_lvds_get_max_backlight(dev); + + dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", + lvds_priv->savePP_ON, + lvds_priv->savePP_OFF, + lvds_priv->saveLVDS, + lvds_priv->savePP_CONTROL, + lvds_priv->savePP_CYCLE, + lvds_priv->saveBLC_PWM_CTL); +} + +static void psb_intel_lvds_restore(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + u32 pp_status; + struct psb_intel_encoder *psb_intel_encoder = + psb_intel_attached_encoder(connector); + struct psb_intel_lvds_priv *lvds_priv = + (struct psb_intel_lvds_priv *)psb_intel_encoder->dev_priv; + + dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", + lvds_priv->savePP_ON, + lvds_priv->savePP_OFF, + lvds_priv->saveLVDS, + lvds_priv->savePP_CONTROL, + lvds_priv->savePP_CYCLE, + lvds_priv->saveBLC_PWM_CTL); + + REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL); + REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL); + REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS); + REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON); + REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF); + /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/ + REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE); + REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL); + REG_WRITE(LVDS, lvds_priv->saveLVDS); + + if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) { + REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) | + POWER_TARGET_ON); + do { + pp_status = REG_READ(PP_STATUS); + } while ((pp_status & PP_ON) == 0); + } else { + REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) & + ~POWER_TARGET_ON); + do { + pp_status = REG_READ(PP_STATUS); + } while (pp_status & PP_ON); + } +} + +int psb_intel_lvds_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct drm_psb_private *dev_priv = connector->dev->dev_private; + struct psb_intel_encoder *psb_intel_encoder = + psb_intel_attached_encoder(connector); + struct drm_display_mode *fixed_mode = + dev_priv->mode_dev.panel_fixed_mode; + + if (psb_intel_encoder->type == INTEL_OUTPUT_MIPI2) + fixed_mode = dev_priv->mode_dev.panel_fixed_mode2; + + /* just in case */ + if (mode->flags & DRM_MODE_FLAG_DBLSCAN) + return MODE_NO_DBLESCAN; + + /* just in case */ + if (mode->flags & DRM_MODE_FLAG_INTERLACE) + return MODE_NO_INTERLACE; + + if (fixed_mode) { + if (mode->hdisplay > fixed_mode->hdisplay) + return MODE_PANEL; + if (mode->vdisplay > fixed_mode->vdisplay) + return MODE_PANEL; + } + return MODE_OK; +} + +bool psb_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_psb_private *dev_priv = dev->dev_private; + struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; + struct psb_intel_crtc *psb_intel_crtc = + to_psb_intel_crtc(encoder->crtc); + struct drm_encoder *tmp_encoder; + struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode; + struct psb_intel_encoder *psb_intel_encoder = + to_psb_intel_encoder(encoder); + + if (psb_intel_encoder->type == INTEL_OUTPUT_MIPI2) + panel_fixed_mode = mode_dev->panel_fixed_mode2; + + /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */ + if (!IS_MRST(dev) && psb_intel_crtc->pipe == 0) { + printk(KERN_ERR "Can't support LVDS on pipe A\n"); + return false; + } + if (IS_MRST(dev) && psb_intel_crtc->pipe != 0) { + printk(KERN_ERR "Must use 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) { + printk(KERN_ERR "Can't enable LVDS and another " + "encoder 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 (panel_fixed_mode != NULL) { + adjusted_mode->hdisplay = panel_fixed_mode->hdisplay; + adjusted_mode->hsync_start = panel_fixed_mode->hsync_start; + adjusted_mode->hsync_end = panel_fixed_mode->hsync_end; + adjusted_mode->htotal = panel_fixed_mode->htotal; + adjusted_mode->vdisplay = panel_fixed_mode->vdisplay; + adjusted_mode->vsync_start = panel_fixed_mode->vsync_start; + adjusted_mode->vsync_end = panel_fixed_mode->vsync_end; + adjusted_mode->vtotal = panel_fixed_mode->vtotal; + adjusted_mode->clock = 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 psb_intel_lvds_prepare(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct drm_psb_private *dev_priv = dev->dev_private; + struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; + + if (!gma_power_begin(dev, true)) + return; + + mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL); + mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL & + BACKLIGHT_DUTY_CYCLE_MASK); + + psb_intel_lvds_set_power(dev, false); + + gma_power_end(dev); +} + +static void psb_intel_lvds_commit(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct drm_psb_private *dev_priv = dev->dev_private; + struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; + + if (mode_dev->backlight_duty_cycle == 0) + mode_dev->backlight_duty_cycle = + psb_intel_lvds_get_max_backlight(dev); + + psb_intel_lvds_set_power(dev, true); +} + +static void psb_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_psb_private *dev_priv = dev->dev_private; + u32 pfit_control; + + /* + * The LVDS pin pair will already have been turned on in the + * psb_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. + */ + if (mode->hdisplay != adjusted_mode->hdisplay || + mode->vdisplay != adjusted_mode->vdisplay) + pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | + HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | + HORIZ_INTERP_BILINEAR); + else + pfit_control = 0; + + if (dev_priv->lvds_dither) + pfit_control |= PANEL_8TO6_DITHER_ENABLE; + + REG_WRITE(PFIT_CONTROL, pfit_control); +} + +/* + * Detect the LVDS connection. + * + * This always returns CONNECTOR_STATUS_CONNECTED. + * This connector should only have + * been set up if the LVDS was actually connected anyway. + */ +static enum drm_connector_status psb_intel_lvds_detect(struct drm_connector + *connector, bool force) +{ + return connector_status_connected; +} + +/* + * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. + */ +static int psb_intel_lvds_get_modes(struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_psb_private *dev_priv = dev->dev_private; + struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev; + struct psb_intel_encoder *psb_intel_encoder = + psb_intel_attached_encoder(connector); + struct psb_intel_lvds_priv *lvds_priv = psb_intel_encoder->dev_priv; + int ret = 0; + + if (!IS_MRST(dev)) + ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter); + + if (ret) + return ret; + + /* 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; + + if (mode_dev->panel_fixed_mode != NULL) { + struct drm_display_mode *mode = + drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); + drm_mode_probed_add(connector, mode); + return 1; + } + + return 0; +} + +/** + * psb_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. + */ +void psb_intel_lvds_destroy(struct drm_connector *connector) +{ + struct psb_intel_encoder *psb_intel_encoder = + psb_intel_attached_encoder(connector); + struct psb_intel_lvds_priv *lvds_priv = psb_intel_encoder->dev_priv; + + if (lvds_priv->ddc_bus) + psb_intel_i2c_destroy(lvds_priv->ddc_bus); + drm_sysfs_connector_remove(connector); + drm_connector_cleanup(connector); + kfree(connector); +} + +int psb_intel_lvds_set_property(struct drm_connector *connector, + struct drm_property *property, + uint64_t value) +{ + struct drm_encoder *encoder = connector->encoder; + + if (!encoder) + return -1; + + if (!strcmp(property->name, "scaling mode")) { + struct psb_intel_crtc *crtc = + to_psb_intel_crtc(encoder->crtc); + uint64_t curval; + + if (!crtc) + goto set_prop_error; + + switch (value) { + case DRM_MODE_SCALE_FULLSCREEN: + break; + case DRM_MODE_SCALE_NO_SCALE: + break; + case DRM_MODE_SCALE_ASPECT: + break; + default: + goto set_prop_error; + } + + if (drm_connector_property_get_value(connector, + property, + &curval)) + goto set_prop_error; + + if (curval == value) + goto set_prop_done; + + if (drm_connector_property_set_value(connector, + property, + value)) + goto set_prop_error; + + if (crtc->saved_mode.hdisplay != 0 && + crtc->saved_mode.vdisplay != 0) { + if (!drm_crtc_helper_set_mode(encoder->crtc, + &crtc->saved_mode, + encoder->crtc->x, + encoder->crtc->y, + encoder->crtc->fb)) + goto set_prop_error; + } + } else if (!strcmp(property->name, "backlight")) { + if (drm_connector_property_set_value(connector, + property, + value)) + goto set_prop_error; + else { +#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE + struct drm_psb_private *devp = + encoder->dev->dev_private; + struct backlight_device *bd = devp->backlight_device; + if (bd) { + bd->props.brightness = value; + backlight_update_status(bd); + } +#endif + } + } else if (!strcmp(property->name, "DPMS")) { + struct drm_encoder_helper_funcs *hfuncs + = encoder->helper_private; + hfuncs->dpms(encoder, value); + } + +set_prop_done: + return 0; +set_prop_error: + return -1; +} + +static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = { + .dpms = psb_intel_lvds_encoder_dpms, + .mode_fixup = psb_intel_lvds_mode_fixup, + .prepare = psb_intel_lvds_prepare, + .mode_set = psb_intel_lvds_mode_set, + .commit = psb_intel_lvds_commit, +}; + +const struct drm_connector_helper_funcs + psb_intel_lvds_connector_helper_funcs = { + .get_modes = psb_intel_lvds_get_modes, + .mode_valid = psb_intel_lvds_mode_valid, + .best_encoder = psb_intel_best_encoder, +}; + +const struct drm_connector_funcs psb_intel_lvds_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .save = psb_intel_lvds_save, + .restore = psb_intel_lvds_restore, + .detect = psb_intel_lvds_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .set_property = psb_intel_lvds_set_property, + .destroy = psb_intel_lvds_destroy, +}; + + +static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder) +{ + drm_encoder_cleanup(encoder); +} + +const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = { + .destroy = psb_intel_lvds_enc_destroy, +}; + + + +/** + * psb_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 psb_intel_lvds_init(struct drm_device *dev, + struct psb_intel_mode_device *mode_dev) +{ + struct psb_intel_encoder *psb_intel_encoder; + struct psb_intel_connector *psb_intel_connector; + struct psb_intel_lvds_priv *lvds_priv; + struct drm_connector *connector; + struct drm_encoder *encoder; + struct drm_display_mode *scan; /* *modes, *bios_mode; */ + struct drm_crtc *crtc; + struct drm_psb_private *dev_priv = dev->dev_private; + u32 lvds; + int pipe; + + psb_intel_encoder = + kzalloc(sizeof(struct psb_intel_encoder), GFP_KERNEL); + + if (!psb_intel_encoder) { + dev_err(dev->dev, "psb_intel_encoder allocation error\n"); + return; + } + + psb_intel_connector = + kzalloc(sizeof(struct psb_intel_connector), GFP_KERNEL); + + if (!psb_intel_connector) { + kfree(psb_intel_encoder); + dev_err(dev->dev, "psb_intel_connector allocation error\n"); + } + + lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL); + if (!lvds_priv) { + dev_err(dev->dev, "LVDS private allocation error\n"); + goto failed_connector; + } + + psb_intel_encoder->dev_priv = lvds_priv; + + connector = &psb_intel_connector->base; + encoder = &psb_intel_encoder->base; + drm_connector_init(dev, connector, + &psb_intel_lvds_connector_funcs, + DRM_MODE_CONNECTOR_LVDS); + + drm_encoder_init(dev, encoder, + &psb_intel_lvds_enc_funcs, + DRM_MODE_ENCODER_LVDS); + + psb_intel_connector_attach_encoder(psb_intel_connector, + psb_intel_encoder); + psb_intel_encoder->type = INTEL_OUTPUT_LVDS; + + drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs); + drm_connector_helper_add(connector, + &psb_intel_lvds_connector_helper_funcs); + connector->display_info.subpixel_order = SubPixelHorizontalRGB; + connector->interlace_allowed = false; + connector->doublescan_allowed = false; + + /*Attach connector properties*/ + drm_connector_attach_property(connector, + dev->mode_config.scaling_mode_property, + DRM_MODE_SCALE_FULLSCREEN); + drm_connector_attach_property(connector, + dev_priv->backlight_property, + BRIGHTNESS_MAX_LEVEL); + + /* + * Set up I2C bus + * FIXME: distroy i2c_bus when exit + */ + lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B"); + if (!lvds_priv->i2c_bus) { + dev_printk(KERN_ERR, + &dev->pdev->dev, "I2C bus registration failed.\n"); + goto failed_blc_i2c; + } + lvds_priv->i2c_bus->slave_addr = 0x2C; + dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus; + + /* + * 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 + */ + + /* Set up the DDC bus. */ + lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C"); + if (!lvds_priv->ddc_bus) { + dev_printk(KERN_ERR, &dev->pdev->dev, + "DDC bus registration " "failed.\n"); + goto failed_ddc; + } + + /* + * Attempt to get the fixed panel mode from DDC. Assume that the + * preferred mode is the right one. + */ + psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter); + list_for_each_entry(scan, &connector->probed_modes, head) { + if (scan->type & DRM_MODE_TYPE_PREFERRED) { + mode_dev->panel_fixed_mode = + drm_mode_duplicate(dev, scan); + goto out; /* FIXME: check for quirks */ + } + } + + /* Failed to get EDID, what about VBT? do we need this? */ + if (mode_dev->vbt_mode) + mode_dev->panel_fixed_mode = + drm_mode_duplicate(dev, mode_dev->vbt_mode); + + if (!mode_dev->panel_fixed_mode) + if (dev_priv->lfp_lvds_vbt_mode) + mode_dev->panel_fixed_mode = + drm_mode_duplicate(dev, + dev_priv->lfp_lvds_vbt_mode); + + /* + * 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 = REG_READ(LVDS); + pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; + crtc = psb_intel_get_crtc_from_pipe(dev, pipe); + + if (crtc && (lvds & LVDS_PORT_EN)) { + mode_dev->panel_fixed_mode = + psb_intel_crtc_mode_get(dev, crtc); + if (mode_dev->panel_fixed_mode) { + mode_dev->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 (!mode_dev->panel_fixed_mode) { + dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n"); + goto failed_find; + } + + /* + * Blacklist machines with BIOSes that list an LVDS panel without + * actually having one. + */ +out: + drm_sysfs_connector_add(connector); + return; + +failed_find: + if (lvds_priv->ddc_bus) + psb_intel_i2c_destroy(lvds_priv->ddc_bus); +failed_ddc: + if (lvds_priv->i2c_bus) + psb_intel_i2c_destroy(lvds_priv->i2c_bus); +failed_blc_i2c: + drm_encoder_cleanup(encoder); + drm_connector_cleanup(connector); +failed_connector: + if (psb_intel_connector) + kfree(psb_intel_connector); +} + |