[v7][PATCH 08/12] drm/i915: Extract glk_read_luts()

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

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 glk_get_color_config() to glk_read_luts() [Ville]
    -Added degamma validation [Ville]

Signed-off-by: Swati Sharma <swati2.sharma@xxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_color.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index fa8e895..4e58cd1 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -1589,6 +1589,14 @@ static void icl_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 glk_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
+		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);
@@ -1633,9 +1641,10 @@ void intel_color_init(struct intel_crtc *crtc)
 		if (INTEL_GEN(dev_priv) >= 11) {
 			dev_priv->display.load_luts = icl_load_luts;
 			dev_priv->display.read_luts = icl_read_luts;
-		}
-		else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
+		} 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)
 			dev_priv->display.load_luts = bdw_load_luts;
 		else if (INTEL_GEN(dev_priv) >= 7)
-- 
1.9.1

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