diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 7f4410296921..6bed4f3ffcd6 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -45,6 +45,22 @@
 #define MIXER_WIN_NR		3
 #define VP_DEFAULT_WIN		2
 
+/*
+ * Mixer color space conversion coefficient triplet.
+ * Used for CSC from RGB to YCbCr.
+ * Each coefficient is a 10-bit fixed point number with
+ * sign and no integer part, i.e.
+ * [0:8] = fractional part (representing a value y = x / 2^9)
+ * [9] = sign
+ * Negative values are encoded with two's complement.
+ */
+#define MXR_CSC_C(x) ((int)((x) * 512.0) & 0x3ff)
+#define MXR_CSC_CT(a0, a1, a2) \
+  ((MXR_CSC_C(a0) << 20) | (MXR_CSC_C(a1) << 10) | (MXR_CSC_C(a2) << 0))
+
+/* YCbCr value, used for mixer background color configuration. */
+#define MXR_YCBCR_VAL(y, cb, cr) (((y) << 16) | ((cb) << 8) | ((cr) << 0))
+
 /* The pixelformats that are natively supported by the mixer. */
 #define MXR_FORMAT_RGB565	4
 #define MXR_FORMAT_ARGB1555	5
@@ -390,13 +406,14 @@ static void mixer_cfg_rgb_fmt(struct mixer_context *ctx, unsigned int height)
 	case 1080:
 	default:
 		val = MXR_CFG_RGB709_16_235;
+		/* Configure the BT.709 CSC matrix for full range RGB. */
 		mixer_reg_write(res, MXR_CM_COEFF_Y,
-				(1 << 30) | (94 << 20) | (314 << 10) |
-				(32 << 0));
+			MXR_CSC_CT( 0.184,  0.614,  0.063) |
+			MXR_CM_COEFF_RGB_FULL);
 		mixer_reg_write(res, MXR_CM_COEFF_CB,
-				(972 << 20) | (851 << 10) | (225 << 0));
+			MXR_CSC_CT(-0.102, -0.338,  0.440));
 		mixer_reg_write(res, MXR_CM_COEFF_CR,
-				(225 << 20) | (820 << 10) | (1004 << 0));
+			MXR_CSC_CT( 0.440, -0.399, -0.040));
 		break;
 	}
 
@@ -714,10 +731,10 @@ static void mixer_win_reset(struct mixer_context *ctx)
 	/* reset default layer priority */
 	mixer_reg_write(res, MXR_LAYER_CFG, 0);
 
-	/* setting background color */
-	mixer_reg_write(res, MXR_BG_COLOR0, 0x008080);
-	mixer_reg_write(res, MXR_BG_COLOR1, 0x008080);
-	mixer_reg_write(res, MXR_BG_COLOR2, 0x008080);
+	/* set all background colors to RGB (0,0,0) */
+	mixer_reg_write(res, MXR_BG_COLOR0, MXR_YCBCR_VAL(0, 128, 128));
+	mixer_reg_write(res, MXR_BG_COLOR1, MXR_YCBCR_VAL(0, 128, 128));
+	mixer_reg_write(res, MXR_BG_COLOR2, MXR_YCBCR_VAL(0, 128, 128));
 
 	if (test_bit(MXR_BIT_VP_ENABLED, &ctx->flags)) {
 		/* configuration of Video Processor Registers */
diff --git a/drivers/gpu/drm/exynos/regs-mixer.h b/drivers/gpu/drm/exynos/regs-mixer.h
index 7f22df5bf707..c311f571bdf9 100644
--- a/drivers/gpu/drm/exynos/regs-mixer.h
+++ b/drivers/gpu/drm/exynos/regs-mixer.h
@@ -140,11 +140,11 @@
 #define MXR_INT_EN_VSYNC		(1 << 11)
 #define MXR_INT_EN_ALL			(0x0f << 8)
 
-/* bit for MXR_INT_STATUS */
+/* bits for MXR_INT_STATUS */
 #define MXR_INT_CLEAR_VSYNC		(1 << 11)
 #define MXR_INT_STATUS_VSYNC		(1 << 0)
 
-/* bit for MXR_LAYER_CFG */
+/* bits for MXR_LAYER_CFG */
 #define MXR_LAYER_CFG_GRP1_VAL(x)	MXR_MASK_VAL(x, 11, 8)
 #define MXR_LAYER_CFG_GRP1_MASK		MXR_LAYER_CFG_GRP1_VAL(~0)
 #define MXR_LAYER_CFG_GRP0_VAL(x)	MXR_MASK_VAL(x, 7, 4)
@@ -152,5 +152,8 @@
 #define MXR_LAYER_CFG_VP_VAL(x)		MXR_MASK_VAL(x, 3, 0)
 #define MXR_LAYER_CFG_VP_MASK		MXR_LAYER_CFG_VP_VAL(~0)
 
+/* bits for MXR_CM_COEFF_Y */
+#define MXR_CM_COEFF_RGB_FULL		(1 << 30)
+
 #endif /* SAMSUNG_REGS_MIXER_H */