drm/i915/icl: Define Plane Input CSC Coefficient Registers

Defined the plane input csc coefficient registers and macros.
6 registers are used to program a total of 9 coefficients,
added macros to define each of them for all the planes
supporting the feature on pipes. On ICL, bottom 3 planes
have this capability.

v2: Segregated the register macro definition as separate patch
as per Maarten's suggestion.

v3: Removed a redundant 3rd Pipe register definition and
simplified the equally spaced register definition by adding an
offset as per Matt's comment.

v4: No Change

v5: Renamed the register Macro as per Matt's suggestion.

v6: No Change

v7: No Change

v8: No Change

v9: No Change
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1541099420-12419-2-git-send-email-uma.shankar@intel.com

drivers/gpu/drm/i915/i915_reg.h

@@ -6582,6 +6582,7 @@ enum {
 #define _PLANE_COLOR_CTL_3_A			0x703CC /* GLK+ */
 #define   PLANE_COLOR_PIPE_GAMMA_ENABLE		(1 << 30) /* Pre-ICL */
 #define   PLANE_COLOR_YUV_RANGE_CORRECTION_DISABLE	(1 << 28)
+#define   PLANE_COLOR_INPUT_CSC_ENABLE		(1 << 20) /* ICL+ */
 #define   PLANE_COLOR_PIPE_CSC_ENABLE		(1 << 23) /* Pre-ICL */
 #define   PLANE_COLOR_CSC_MODE_BYPASS			(0 << 17)
 #define   PLANE_COLOR_CSC_MODE_YUV601_TO_RGB709		(1 << 17)
@@ -6598,6 +6599,55 @@ enum {
 #define _PLANE_NV12_BUF_CFG_1_A		0x70278
 #define _PLANE_NV12_BUF_CFG_2_A		0x70378
 
+/* Input CSC Register Definitions */
+#define _PLANE_INPUT_CSC_RY_GY_1_A	0x701E0
+#define _PLANE_INPUT_CSC_RY_GY_2_A	0x702E0
+
+#define _PLANE_INPUT_CSC_RY_GY_1_B	0x711E0
+#define _PLANE_INPUT_CSC_RY_GY_2_B	0x712E0
+
+#define _PLANE_INPUT_CSC_RY_GY_1(pipe)	\
+	_PIPE(pipe, _PLANE_INPUT_CSC_RY_GY_1_A, \
+	     _PLANE_INPUT_CSC_RY_GY_1_B)
+#define _PLANE_INPUT_CSC_RY_GY_2(pipe)	\
+	_PIPE(pipe, _PLANE_INPUT_CSC_RY_GY_2_A, \
+	     _PLANE_INPUT_CSC_RY_GY_2_B)
+
+#define PLANE_INPUT_CSC_COEFF(pipe, plane, index)	\
+	_MMIO_PLANE(plane, _PLANE_INPUT_CSC_RY_GY_1(pipe) +  (index) * 4, \
+		    _PLANE_INPUT_CSC_RY_GY_2(pipe) + (index) * 4)
+
+#define _PLANE_INPUT_CSC_PREOFF_HI_1_A		0x701F8
+#define _PLANE_INPUT_CSC_PREOFF_HI_2_A		0x702F8
+
+#define _PLANE_INPUT_CSC_PREOFF_HI_1_B		0x711F8
+#define _PLANE_INPUT_CSC_PREOFF_HI_2_B		0x712F8
+
+#define _PLANE_INPUT_CSC_PREOFF_HI_1(pipe)	\
+	_PIPE(pipe, _PLANE_INPUT_CSC_PREOFF_HI_1_A, \
+	     _PLANE_INPUT_CSC_PREOFF_HI_1_B)
+#define _PLANE_INPUT_CSC_PREOFF_HI_2(pipe)	\
+	_PIPE(pipe, _PLANE_INPUT_CSC_PREOFF_HI_2_A, \
+	     _PLANE_INPUT_CSC_PREOFF_HI_2_B)
+#define PLANE_INPUT_CSC_PREOFF(pipe, plane, index)	\
+	_MMIO_PLANE(plane, _PLANE_INPUT_CSC_PREOFF_HI_1(pipe) + (index) * 4, \
+		    _PLANE_INPUT_CSC_PREOFF_HI_2(pipe) + (index) * 4)
+
+#define _PLANE_INPUT_CSC_POSTOFF_HI_1_A		0x70204
+#define _PLANE_INPUT_CSC_POSTOFF_HI_2_A		0x70304
+
+#define _PLANE_INPUT_CSC_POSTOFF_HI_1_B		0x71204
+#define _PLANE_INPUT_CSC_POSTOFF_HI_2_B		0x71304
+
+#define _PLANE_INPUT_CSC_POSTOFF_HI_1(pipe)	\
+	_PIPE(pipe, _PLANE_INPUT_CSC_POSTOFF_HI_1_A, \
+	     _PLANE_INPUT_CSC_POSTOFF_HI_1_B)
+#define _PLANE_INPUT_CSC_POSTOFF_HI_2(pipe)	\
+	_PIPE(pipe, _PLANE_INPUT_CSC_POSTOFF_HI_2_A, \
+	     _PLANE_INPUT_CSC_POSTOFF_HI_2_B)
+#define PLANE_INPUT_CSC_POSTOFF(pipe, plane, index)	\
+	_MMIO_PLANE(plane, _PLANE_INPUT_CSC_POSTOFF_HI_1(pipe) + (index) * 4, \
+		    _PLANE_INPUT_CSC_POSTOFF_HI_2(pipe) + (index) * 4)
 
 #define _PLANE_CTL_1_B				0x71180
 #define _PLANE_CTL_2_B				0x71280