// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright © 2006-2007 Intel Corporation
*
* Authors:
* Eric Anholt <[email protected]>
* Dave Airlie <[email protected]>
* Jesse Barnes <[email protected]>
*/
#include <linux/i2c.h>
#include <linux/pm_runtime.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_simple_kms_helper.h>
#include "intel_bios.h"
#include "power.h"
#include "psb_drv.h"
#include "psb_intel_drv.h"
#include "psb_intel_reg.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 gma_i2c_chan *i2c_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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
struct gma_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->target_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->base, 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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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);
}
}
enum drm_mode_status psb_intel_lvds_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct drm_psb_private *dev_priv = to_drm_psb_private(connector->dev);
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 = to_drm_psb_private(dev);
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) {
pr_err("Can't support LVDS on pipe A\n");
return false;
}
if (IS_MRST(dev) && gma_crtc->pipe != 0) {
pr_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) {
pr_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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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 = to_drm_psb_private(dev);
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);
}
/*
* 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 = to_drm_psb_private(dev);
struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
int ret = 0;
if (!IS_MRST(dev))
ret = psb_intel_ddc_get_modes(connector, connector->ddc);
if (ret)
return ret;
if (mode_dev->panel_fixed_mode != NULL) {
struct drm_display_mode *mode =
drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
if (!mode)
return 0;
drm_mode_probed_add(connector, mode);
return 1;
}
return 0;
}
void psb_intel_lvds_destroy(struct drm_connector *connector)
{
struct gma_connector *gma_connector = to_gma_connector(connector);
struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);
gma_i2c_destroy(ddc_bus);
drm_connector_cleanup(connector);
kfree(gma_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,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = psb_intel_lvds_set_property,
.destroy = psb_intel_lvds_destroy,
};
/**
* psb_intel_lvds_init - setup LVDS connectors on this device
* @dev: drm device
* @mode_dev: mode 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 = to_drm_psb_private(dev);
struct gma_i2c_chan *ddc_bus;
u32 lvds;
int pipe;
int ret;
gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
if (!gma_encoder) {
dev_err(dev->dev, "gma_encoder allocation error\n");
return;
}
encoder = &gma_encoder->base;
gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
if (!gma_connector) {
dev_err(dev->dev, "gma_connector allocation error\n");
goto err_free_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 err_free_connector;
}
gma_encoder->dev_priv = lvds_priv;
connector = &gma_connector->base;
gma_connector->save = psb_intel_lvds_save;
gma_connector->restore = psb_intel_lvds_restore;
/* Set up the DDC bus. */
ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C");
if (!ddc_bus) {
dev_printk(KERN_ERR, dev->dev,
"DDC bus registration " "failed.\n");
goto err_free_lvds_priv;
}
ret = drm_connector_init_with_ddc(dev, connector,
&psb_intel_lvds_connector_funcs,
DRM_MODE_CONNECTOR_LVDS,
&ddc_bus->base);
if (ret)
goto err_ddc_destroy;
ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
if (ret)
goto err_connector_cleanup;
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 = gma_i2c_create(dev, GPIOB, "LVDSBLC_B");
if (!lvds_priv->i2c_bus) {
dev_printk(KERN_ERR,
dev->dev, "I2C bus registration failed.\n");
goto err_encoder_cleanup;
}
lvds_priv->i2c_bus->target_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
*/
/*
* 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, &ddc_bus->base);
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);
DRM_DEBUG_KMS("Using mode from DDC\n");
goto out; /* FIXME: check for quirks */
}
}
/* Failed to get EDID, what about VBT? do we need this? */
if (dev_priv->lfp_lvds_vbt_mode) {
mode_dev->panel_fixed_mode =
drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
if (mode_dev->panel_fixed_mode) {
mode_dev->panel_fixed_mode->type |=
DRM_MODE_TYPE_PREFERRED;
DRM_DEBUG_KMS("Using mode from VBT\n");
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.
*/
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;
DRM_DEBUG_KMS("Using pre-programmed mode\n");
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 err_unlock;
}
/*
* Blacklist machines with BIOSes that list an LVDS panel without
* actually having one.
*/
out:
mutex_unlock(&dev->mode_config.mutex);
return;
err_unlock:
mutex_unlock(&dev->mode_config.mutex);
gma_i2c_destroy(lvds_priv->i2c_bus);
err_encoder_cleanup:
drm_encoder_cleanup(encoder);
err_connector_cleanup:
drm_connector_cleanup(connector);
err_ddc_destroy:
gma_i2c_destroy(ddc_bus);
err_free_lvds_priv:
kfree(lvds_priv);
err_free_connector:
kfree(gma_connector);
err_free_encoder:
kfree(gma_encoder);
}
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