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drm/i915: pnv has a backlight polarity control bit, too

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We already correctly ignore bit0 on gen < 4, now we also know why ;-)
I've decided that losing that single bit of precision isn't worth the
trouble to sprinkle IS_PINEVIEW checks all over the backlight control
code - that code is way too fragile imo.

Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-06-05 10:07:08 +02:00
parent afba018898
commit 534b5a5341
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_reg.h
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@ -1828,6 +1828,8 @@
*/
#define BACKLIGHT_DUTY_CYCLE_SHIFT (0)
#define BACKLIGHT_DUTY_CYCLE_MASK (0xffff)
#define BACKLIGHT_DUTY_CYCLE_MASK_PNV (0xfffe)
#define BLM_POLARITY_PNV (1 << 0) /* pnv only */
#define BLC_HIST_CTL 0x61260