[Intel-gfx] [PATCH 5/9] drm/i915: Reset glk degamma index after programming/readout

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Just for some extra consistency let's reset the glk degamma LUT
index back to 0 after we're dong trawling the LUT.

Reviewed-by: Uma Shankar <uma.shankar at intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_color.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 77c103a86a30..37a4fede7bc0 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -818,12 +818,14 @@ static void glk_load_degamma_lut(const struct intel_crtc_state *crtc_state)
 		 * as compared to just 16 to achieve this.
 		 */
 		intel_de_write(dev_priv, PRE_CSC_GAMC_DATA(pipe),
-		               lut[i].green);
+			       lut[i].green);
 	}
 
 	/* Clamp values > 1.0. */
 	while (i++ < 35)
 		intel_de_write(dev_priv, PRE_CSC_GAMC_DATA(pipe), 1 << 16);
+
+	intel_de_write(dev_priv, PRE_CSC_GAMC_INDEX(pipe), 0);
 }
 
 static void glk_load_degamma_lut_linear(const struct intel_crtc_state *crtc_state)
@@ -851,6 +853,8 @@ static void glk_load_degamma_lut_linear(const struct intel_crtc_state *crtc_stat
 	/* Clamp values > 1.0. */
 	while (i++ < 35)
 		intel_de_write(dev_priv, PRE_CSC_GAMC_DATA(pipe), 1 << 16);
+
+	intel_de_write(dev_priv, PRE_CSC_GAMC_INDEX(pipe), 0);
 }
 
 static void glk_load_luts(const struct intel_crtc_state *crtc_state)
-- 
2.26.2