[v6][PATCH 09/12] drm/i915: Extract bdw_read_luts()

[Swati Sharma]

In this patch, gamma and degamma hw blobs are created for BDW.

v4: -No need to initialize *blob [Jani]
    -Removed right shifts [Jani]
    -Dropped dev local var [Jani]
v5: -Returned blob instead of assigning it internally within the
     function [Ville]
    -Renamed bdw_get_color_config() to bdw_read_luts() [Ville]
    -Enabled degamma lut validation [Ville]

Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
---
 drivers/gpu/drm/i915/intel_color.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 9c1e292..97c012b 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -1602,6 +1602,19 @@ static void glk_read_luts(struct intel_crtc_state *crtc_state)
 		crtc_state->base.gamma_lut = bdw_read_lut_10(crtc_state, PAL_PREC_INDEX_VALUE(0));
 }
 
+static void bdw_read_luts(struct intel_crtc_state *crtc_state)
+{
+	if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT) {
+		crtc_state->base.gamma_lut = i9xx_read_lut_8(crtc_state);
+	} else if (crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) {
+		crtc_state->base.degamma_lut = bdw_read_lut_10(crtc_state, PAL_PREC_SPLIT_MODE | PAL_PREC_INDEX_VALUE(0));
+		crtc_state->base.gamma_lut = bdw_read_lut_10(crtc_state, PAL_PREC_INDEX_VALUE(512));
+	} else {
+		crtc_state->base.degamma_lut = bdw_read_lut_10(crtc_state, PAL_PREC_INDEX_VALUE(0));
+		crtc_state->base.gamma_lut = bdw_read_lut_10(crtc_state, PAL_PREC_INDEX_VALUE(0));
+	}
+}
+
 void intel_color_init(struct intel_crtc *crtc)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
@@ -1649,9 +1662,10 @@ void intel_color_init(struct intel_crtc *crtc)
 		} else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) {
 			dev_priv->display.load_luts = glk_load_luts;
 			dev_priv->display.read_luts = glk_read_luts;
-		}
-		else if (INTEL_GEN(dev_priv) >= 8)
+		} else if (INTEL_GEN(dev_priv) >= 8) {
 			dev_priv->display.load_luts = bdw_load_luts;
+			dev_priv->display.read_luts = bdw_read_luts;
+		}
 		else if (INTEL_GEN(dev_priv) >= 7)
 			dev_priv->display.load_luts = ivb_load_luts;
 		else
-- 
1.9.1