Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_panel.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index a821949..e82b2dd 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -555,7 +555,7 @@ static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
{
struct drm_device *dev = connector->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
- u32 tmp;
+ u32 tmp, mask;
if (is_backlight_combination_mode(dev)) {
u32 max = intel_panel_get_max_backlight(connector);
@@ -570,10 +570,14 @@ static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
pci_write_config_byte(dev->pdev, PCI_LBPC, lbpc);
}
- if (INTEL_INFO(dev)->gen < 4)
+ if (IS_GEN4(dev)) {
+ mask = BACKLIGHT_DUTY_CYCLE_MASK;
+ } else {
level <<= 1;
+ mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV;
+ }
- tmp = I915_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
+ tmp = I915_READ(BLC_PWM_CTL) & ~mask;
I915_WRITE(BLC_PWM_CTL, tmp | level);
}
--
1.7.10.4
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