gma500: Fix backlight crash
Initial changes to get backlight behaviour we want and to fix backlight crashes on suspend/resume paths. [Note: on some boxes this will now produce a warning about the backlight, this isn't a regression it's an unfixed but non harmful case I still need to nail] Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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d921b0b765
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2a30cda7af
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@ -302,7 +302,7 @@ int psb_runtime_suspend(struct device *dev)
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int psb_runtime_resume(struct device *dev)
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{
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return 0;
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return gma_power_resume(dev);;
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}
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int psb_runtime_idle(struct device *dev)
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@ -68,20 +68,23 @@ struct psb_intel_lvds_priv {
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static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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u32 retVal;
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u32 ret;
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if (gma_power_begin(dev, false)) {
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retVal = ((REG_READ(BLC_PWM_CTL) &
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BACKLIGHT_MODULATION_FREQ_MASK) >>
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BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
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ret = REG_READ(BLC_PWM_CTL);
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gma_power_end(dev);
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} else
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retVal = ((dev_priv->saveBLC_PWM_CTL &
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BACKLIGHT_MODULATION_FREQ_MASK) >>
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BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
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} else /* Powered off, use the saved value */
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ret = dev_priv->saveBLC_PWM_CTL;
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return retVal;
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/* Top 15bits hold the frequency mask */
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ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >>
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BACKLIGHT_MODULATION_FREQ_SHIFT;
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ret *= 2; /* Return a 16bit range as needed for setting */
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if (ret == 0)
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dev_err(dev->dev, "BL bug: Reg %08x save %08X\n",
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REG_READ(BLC_PWM_CTL), dev_priv->saveBLC_PWM_CTL);
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return ret;
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}
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/*
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@ -142,7 +145,7 @@ static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
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max_pwm_blc = psb_intel_lvds_get_max_backlight(dev);
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/*BLC_PWM_CTL Should be initiated while backlight device init*/
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BUG_ON((max_pwm_blc & PSB_BLC_MAX_PWM_REG_FREQ) == 0);
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BUG_ON(max_pwm_blc == 0);
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blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
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@ -154,6 +157,10 @@ static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
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(max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
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(blc_pwm_duty_cycle));
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dev_info(dev->dev, "Backlight lvds set brightness %08x\n",
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(max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
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(blc_pwm_duty_cycle));
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return 0;
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}
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@ -162,14 +169,12 @@ static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
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*/
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void psb_intel_lvds_set_brightness(struct drm_device *dev, int level)
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{
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/*u32 blc_pwm_ctl;*/
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struct drm_psb_private *dev_priv =
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(struct drm_psb_private *)dev->dev_private;
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struct drm_psb_private *dev_priv = dev->dev_private;
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dev_dbg(dev->dev, "backlight level is %d\n", level);
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if (!dev_priv->lvds_bl) {
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dev_err(dev->dev, "NO LVDS Backlight Info\n");
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dev_err(dev->dev, "NO LVDS backlight info\n");
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return;
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}
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@ -190,11 +195,13 @@ static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level)
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u32 blc_pwm_ctl;
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if (gma_power_begin(dev, false)) {
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blc_pwm_ctl =
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REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
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blc_pwm_ctl = REG_READ(BLC_PWM_CTL);
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blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
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REG_WRITE(BLC_PWM_CTL,
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(blc_pwm_ctl |
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(level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
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dev_priv->saveBLC_PWM_CTL = (blc_pwm_ctl |
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(level << BACKLIGHT_DUTY_CYCLE_SHIFT));
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gma_power_end(dev);
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} else {
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blc_pwm_ctl = dev_priv->saveBLC_PWM_CTL &
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@ -212,9 +219,11 @@ static void psb_intel_lvds_set_power(struct drm_device *dev,
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{
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u32 pp_status;
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if (!gma_power_begin(dev, true))
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if (!gma_power_begin(dev, true)) {
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dev_err(dev->dev, "set power, chip off!\n");
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return;
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}
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if (on) {
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REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
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POWER_TARGET_ON);
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@ -296,9 +305,6 @@ static void psb_intel_lvds_restore(struct drm_connector *connector)
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{
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struct drm_device *dev = connector->dev;
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u32 pp_status;
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/*struct drm_psb_private *dev_priv =
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(struct drm_psb_private *)dev->dev_private;*/
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struct psb_intel_output *psb_intel_output =
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to_psb_intel_output(connector);
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struct psb_intel_lvds_priv *lvds_priv =
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@ -621,7 +627,8 @@ int psb_intel_lvds_set_property(struct drm_connector *connector,
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goto set_prop_error;
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else {
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#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
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struct drm_psb_private *devp = encoder->dev->dev_private;
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struct drm_psb_private *devp =
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encoder->dev->dev_private;
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struct backlight_device *bd = devp->backlight_device;
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if (bd) {
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bd->props.brightness = value;
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@ -694,8 +701,7 @@ void psb_intel_lvds_init(struct drm_device *dev,
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struct drm_encoder *encoder;
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struct drm_display_mode *scan; /* *modes, *bios_mode; */
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struct drm_crtc *crtc;
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struct drm_psb_private *dev_priv =
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(struct drm_psb_private *)dev->dev_private;
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struct drm_psb_private *dev_priv = dev->dev_private;
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u32 lvds;
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int pipe;
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@ -711,8 +717,8 @@ void psb_intel_lvds_init(struct drm_device *dev,
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}
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psb_intel_output->dev_priv = lvds_priv;
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psb_intel_output->mode_dev = mode_dev;
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connector = &psb_intel_output->base;
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encoder = &psb_intel_output->enc;
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drm_connector_init(dev, &psb_intel_output->base,
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