diff options
| author | Carsten Emde <C.Emde@osadl.org> | 2012-03-15 15:56:26 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-03-18 21:48:18 +0100 |
| commit | 4dca20efb1a9c2efefc28ad2867e5d6c3f5e1955 (patch) | |
| tree | 807c4807c91bf53db35fd28e05eaeaa846d41bde /drivers/gpu/drm/i915/intel_panel.c | |
| parent | 7bd90909bbf9ce7c40e1da3d72b97b93839c188a (diff) | |
drm/i915: panel: invert brightness via quirk
A machine may need to invert the panel backlight brightness value. This
patch adds the infrastructure for a quirk to do so.
Signed-off-by: Carsten Emde <C.Emde@osadl.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_panel.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index c4b3f349af69..7998ca6f594f 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -192,15 +192,22 @@ u32 intel_panel_get_max_backlight(struct drm_device *dev) return max; } -static bool i915_panel_invert_brightness; -MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness, please " +static int i915_panel_invert_brightness; +MODULE_PARM_DESC(invert_brightness, "Invert backlight brightness " + "(-1 force normal, 0 machine defaults, 1 force inversion), please " "report PCI device ID, subsystem vendor and subsystem device ID " "to dri-devel@lists.freedesktop.org, if your machine needs it. " "It will then be included in an upcoming module version."); -module_param_named(invert_brightness, i915_panel_invert_brightness, bool, 0600); +module_param_named(invert_brightness, i915_panel_invert_brightness, int, 0600); static u32 intel_panel_compute_brightness(struct drm_device *dev, u32 val) { - if (i915_panel_invert_brightness) + struct drm_i915_private *dev_priv = dev->dev_private; + + if (i915_panel_invert_brightness < 0) + return val; + + if (i915_panel_invert_brightness > 0 || + dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) return intel_panel_get_max_backlight(dev) - val; return val; |