diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_color.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c index 1d26be54ddfc..1e734e932917 100644 --- a/drivers/gpu/drm/i915/display/intel_color.c +++ b/drivers/gpu/drm/i915/display/intel_color.c @@ -785,14 +785,12 @@ static void chv_assign_csc(struct intel_crtc_state *crtc_state) /* convert hw value with given bit_precision to lut property val */ static u32 intel_color_lut_pack(u32 val, int bit_precision) { - u32 max = 0xffff >> (16 - bit_precision); - - val = clamp_val(val, 0, max); - - if (bit_precision < 16) - val <<= 16 - bit_precision; - - return val; + if (bit_precision > 16) + return DIV_ROUND_CLOSEST_ULL(mul_u32_u32(val, (1 << 16) - 1), + (1 << bit_precision) - 1); + else + return DIV_ROUND_CLOSEST(val * ((1 << 16) - 1), + (1 << bit_precision) - 1); } static u32 i9xx_lut_8(const struct drm_color_lut *color) |