--- /dev/null
+/*
+ * 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->regs.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->regs.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->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
+ (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
+ gma_power_end(dev);
+ } else {
+ blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
+ ~BACKLIGHT_DUTY_CYCLE_MASK;
+ dev_priv->regs.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 gma_encoder *gma_encoder = gma_attached_encoder(connector);
+ struct psb_intel_lvds_priv *lvds_priv =
+ (struct psb_intel_lvds_priv *)gma_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->regs.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 gma_encoder *gma_encoder = gma_attached_encoder(connector);
+ struct psb_intel_lvds_priv *lvds_priv =
+ (struct psb_intel_lvds_priv *)gma_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 gma_encoder *gma_encoder = gma_attached_encoder(connector);
+ struct drm_display_mode *fixed_mode =
+ dev_priv->mode_dev.panel_fixed_mode;
+
+ if (gma_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,
+ const 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 gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
+ struct drm_encoder *tmp_encoder;
+ struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
+ struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
+
+ if (gma_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) && gma_crtc->pipe == 0) {
+ printk(KERN_ERR "Can't support LVDS on pipe A\n");
+ return false;
+ }
+ if (IS_MRST(dev) && gma_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 gma_encoder *gma_encoder = gma_attached_encoder(connector);
+ struct psb_intel_lvds_priv *lvds_priv = gma_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 gma_encoder *gma_encoder = gma_attached_encoder(connector);
+ struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
+
+ if (lvds_priv->ddc_bus)
+ psb_intel_i2c_destroy(lvds_priv->ddc_bus);
+ drm_connector_unregister(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 gma_crtc *crtc = to_gma_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_object_property_get_value(&connector->base,
+ property,
+ &curval))
+ goto set_prop_error;
+
+ if (curval == value)
+ goto set_prop_done;
+
+ if (drm_object_property_set_value(&connector->base,
+ 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->primary->fb))
+ goto set_prop_error;
+ }
+ } else if (!strcmp(property->name, "backlight")) {
+ if (drm_object_property_set_value(&connector->base,
+ property,
+ value))
+ goto set_prop_error;
+ else
+ gma_backlight_set(encoder->dev, value);
+ } else if (!strcmp(property->name, "DPMS")) {
+ const 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 = gma_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 gma_encoder *gma_encoder;
+ struct gma_connector *gma_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;
+
+ gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
+ if (!gma_encoder) {
+ dev_err(dev->dev, "gma_encoder allocation error\n");
+ return;
+ }
+
+ gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
+ if (!gma_connector) {
+ dev_err(dev->dev, "gma_connector allocation error\n");
+ goto failed_encoder;
+ }
+
+ 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;
+ }
+
+ gma_encoder->dev_priv = lvds_priv;
+
+ connector = &gma_connector->base;
+ encoder = &gma_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);
+
+ gma_connector_attach_encoder(gma_connector, gma_encoder);
+ gma_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_object_attach_property(&connector->base,
+ dev->mode_config.scaling_mode_property,
+ DRM_MODE_SCALE_FULLSCREEN);
+ drm_object_attach_property(&connector->base,
+ 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.
+ */
+ mutex_lock(&dev->mode_config.mutex);
+ 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:
+ mutex_unlock(&dev->mode_config.mutex);
+ drm_connector_register(connector);
+ return;
+
+failed_find:
+ mutex_unlock(&dev->mode_config.mutex);
+ 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:
+ kfree(gma_connector);
+failed_encoder:
+ kfree(gma_encoder);
+}
+
Code Review / kvmfornfv.git / blobdiff