diff options
| author | Sean Paul <seanpaul@chromium.org> | 2018-03-21 09:40:55 -0400 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2018-03-21 09:40:55 -0400 |
| commit | 1c7095d2836baafd84e596dd34ba1a1293a4faa9 (patch) | |
| tree | 498f529809b9c0a3c75c8b8bb1098ed4f71233db /drivers/gpu/drm/i915/intel_panel.c | |
| parent | 2793c1d77aa8876e5674e901d051c79570e99db2 (diff) | |
| parent | 78230c46ec0a91dd4256c9e54934b3c7095a7ee3 (diff) | |
Merge airlied/drm-next into drm-misc-next
Refresh -misc-next
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_panel.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index e702a6487aa9..41d00b1603e3 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -397,8 +397,11 @@ intel_panel_detect(struct drm_i915_private *dev_priv) /** * scale - scale values from one range to another - * * @source_val: value in range [@source_min..@source_max] + * @source_min: minimum legal value for @source_val + * @source_max: maximum legal value for @source_val + * @target_min: corresponding target value for @source_min + * @target_max: corresponding target value for @source_max * * Return @source_val in range [@source_min..@source_max] scaled to range * [@target_min..@target_max]. @@ -416,8 +419,9 @@ static uint32_t scale(uint32_t source_val, source_val = clamp(source_val, source_min, source_max); /* avoid overflows */ - target_val = DIV_ROUND_CLOSEST_ULL((uint64_t)(source_val - source_min) * - (target_max - target_min), source_max - source_min); + target_val = mul_u32_u32(source_val - source_min, + target_max - target_min); + target_val = DIV_ROUND_CLOSEST_ULL(target_val, source_max - source_min); target_val += target_min; return target_val; @@ -497,7 +501,7 @@ static u32 i9xx_get_backlight(struct intel_connector *connector) u32 val; val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; - if (INTEL_INFO(dev_priv)->gen < 4) + if (INTEL_GEN(dev_priv) < 4) val >>= 1; if (panel->backlight.combination_mode) { |