return 0;
}
+/* XXX: query mode clock or hardware clock and program max PWM appropriately
+ * when it's 0.
+ */
static u32 i915_read_blc_pwm_ctl(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
return val;
}
-static u32 _intel_panel_get_max_backlight(struct drm_device *dev)
+static u32 intel_panel_get_max_backlight(struct drm_device *dev)
{
u32 max;
max *= 0xff;
}
- return max;
-}
-
-u32 intel_panel_get_max_backlight(struct drm_device *dev)
-{
- u32 max;
-
- max = _intel_panel_get_max_backlight(dev);
- if (max == 0) {
- /* XXX add code here to query mode clock or hardware clock
- * and program max PWM appropriately.
- */
- pr_warn_once("fixme: max PWM is zero\n");
- return 1;
- }
-
DRM_DEBUG_DRIVER("max backlight PWM = %d\n", max);
+
return max;
}
return val;
if (i915_panel_invert_brightness > 0 ||
- dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)
- return intel_panel_get_max_backlight(dev) - val;
+ dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
+ u32 max = intel_panel_get_max_backlight(dev);
+ if (max)
+ return max - val;
+ }
return val;
}
u32 max = intel_panel_get_max_backlight(dev);
u8 lbpc;
+ /* we're screwed, but keep behaviour backwards compatible */
+ if (!max)
+ max = 1;
+
lbpc = level * 0xfe / max + 1;
level /= lbpc;
pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
I915_WRITE(BLC_PWM_CTL, tmp | level);
}
-void intel_panel_set_backlight(struct drm_device *dev, u32 level)
+/* set backlight brightness to level in range [0..max] */
+void intel_panel_set_backlight(struct drm_device *dev, u32 level, u32 max)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ u32 freq;
+
+ freq = intel_panel_get_max_backlight(dev);
+ if (!freq) {
+ /* we are screwed, bail out */
+ return;
+ }
- dev_priv->backlight_level = level;
- if (dev_priv->backlight_enabled)
+ /* scale to hardware */
+ level = level * freq / max;
+
+ dev_priv->backlight.level = level;
+ if (dev_priv->backlight.device)
+ dev_priv->backlight.device->props.brightness = level;
+
+ if (dev_priv->backlight.enabled)
intel_panel_actually_set_backlight(dev, level);
}
{
struct drm_i915_private *dev_priv = dev->dev_private;
- dev_priv->backlight_enabled = false;
+ dev_priv->backlight.enabled = false;
intel_panel_actually_set_backlight(dev, 0);
if (INTEL_INFO(dev)->gen >= 4) {
{
struct drm_i915_private *dev_priv = dev->dev_private;
- if (dev_priv->backlight_level == 0)
- dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
-
- dev_priv->backlight_enabled = true;
- intel_panel_actually_set_backlight(dev, dev_priv->backlight_level);
+ if (dev_priv->backlight.level == 0) {
+ dev_priv->backlight.level = intel_panel_get_max_backlight(dev);
+ if (dev_priv->backlight.device)
+ dev_priv->backlight.device->props.brightness =
+ dev_priv->backlight.level;
+ }
if (INTEL_INFO(dev)->gen >= 4) {
uint32_t reg, tmp;
if (tmp & BLM_PWM_ENABLE)
goto set_level;
- if (dev_priv->num_pipe == 3)
+ if (INTEL_INFO(dev)->num_pipes == 3)
tmp &= ~BLM_PIPE_SELECT_IVB;
else
tmp &= ~BLM_PIPE_SELECT;
}
set_level:
- /* Check the current backlight level and try to set again if it's zero.
- * On some machines, BLC_PWM_CPU_CTL is cleared to zero automatically
- * when BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1 are written.
+ /* Call below after setting BLC_PWM_CPU_CTL2 and BLC_PWM_PCH_CTL1.
+ * BLC_PWM_CPU_CTL may be cleared to zero automatically when these
+ * registers are set.
*/
- if (!intel_panel_get_backlight(dev))
- intel_panel_actually_set_backlight(dev, dev_priv->backlight_level);
+ dev_priv->backlight.enabled = true;
+ intel_panel_actually_set_backlight(dev, dev_priv->backlight.level);
}
static void intel_panel_init_backlight(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
- dev_priv->backlight_level = intel_panel_get_backlight(dev);
- dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
+ dev_priv->backlight.level = intel_panel_get_backlight(dev);
+ dev_priv->backlight.enabled = dev_priv->backlight.level != 0;
}
enum drm_connector_status
static int intel_panel_update_status(struct backlight_device *bd)
{
struct drm_device *dev = bl_get_data(bd);
- intel_panel_set_backlight(dev, bd->props.brightness);
+ intel_panel_set_backlight(dev, bd->props.brightness,
+ bd->props.max_brightness);
return 0;
}
static int intel_panel_get_brightness(struct backlight_device *bd)
{
struct drm_device *dev = bl_get_data(bd);
- struct drm_i915_private *dev_priv = dev->dev_private;
- return dev_priv->backlight_level;
+ return intel_panel_get_backlight(dev);
}
static const struct backlight_ops intel_panel_bl_ops = {
intel_panel_init_backlight(dev);
+ if (WARN_ON(dev_priv->backlight.device))
+ return -ENODEV;
+
memset(&props, 0, sizeof(props));
props.type = BACKLIGHT_RAW;
- props.max_brightness = _intel_panel_get_max_backlight(dev);
+ props.brightness = dev_priv->backlight.level;
+ props.max_brightness = intel_panel_get_max_backlight(dev);
if (props.max_brightness == 0) {
DRM_DEBUG_DRIVER("Failed to get maximum backlight value\n");
return -ENODEV;
}
- dev_priv->backlight =
+ dev_priv->backlight.device =
backlight_device_register("intel_backlight",
&connector->kdev, dev,
&intel_panel_bl_ops, &props);
- if (IS_ERR(dev_priv->backlight)) {
+ if (IS_ERR(dev_priv->backlight.device)) {
DRM_ERROR("Failed to register backlight: %ld\n",
- PTR_ERR(dev_priv->backlight));
- dev_priv->backlight = NULL;
+ PTR_ERR(dev_priv->backlight.device));
+ dev_priv->backlight.device = NULL;
return -ENODEV;
}
- dev_priv->backlight->props.brightness = intel_panel_get_backlight(dev);
return 0;
}
void intel_panel_destroy_backlight(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
- if (dev_priv->backlight)
- backlight_device_unregister(dev_priv->backlight);
+ if (dev_priv->backlight.device) {
+ backlight_device_unregister(dev_priv->backlight.device);
+ dev_priv->backlight.device = NULL;
+ }
}
#else
int intel_panel_setup_backlight(struct drm_connector *connector)
projects / deliverable / linux.git / blobdiff