drivers/gpu/drm/amd/display/dc/dcn10/dcn10_opp.c - linux - Git at Google

 /*
  * Copyright 2012-15 Advanced Micro Devices, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  *
  * Authors: AMD
  *
  */

 #include <linux/slab.h>

 #include "dm_services.h"
 #include "dcn10_opp.h"
 #include "reg_helper.h"

 #define REG(reg) \
 	(oppn10->regs->reg)

 #undef FN
 #define FN(reg_name, field_name) \
 	oppn10->opp_shift->field_name, oppn10->opp_mask->field_name

 #define CTX \
 	oppn10->base.ctx


 /************* FORMATTER ************/

 /**
  *	set_truncation
  *	1) set truncation depth: 0 for 18 bpp or 1 for 24 bpp
  *	2) enable truncation
  *	3) HW remove 12bit FMT support for DCE11 power saving reason.
  */
 static void opp1_set_truncation(
 		struct dcn10_opp *oppn10,
 		const struct bit_depth_reduction_params *params)
 {
 	REG_UPDATE_3(FMT_BIT_DEPTH_CONTROL,
 		FMT_TRUNCATE_EN, params->flags.TRUNCATE_ENABLED,
 		FMT_TRUNCATE_DEPTH, params->flags.TRUNCATE_DEPTH,
 		FMT_TRUNCATE_MODE, params->flags.TRUNCATE_MODE);
 }

 static void opp1_set_spatial_dither(
 	struct dcn10_opp *oppn10,
 	const struct bit_depth_reduction_params *params)
 {
 	/*Disable spatial (random) dithering*/
 	REG_UPDATE_7(FMT_BIT_DEPTH_CONTROL,
 			FMT_SPATIAL_DITHER_EN, 0,
 			FMT_SPATIAL_DITHER_MODE, 0,
 			FMT_SPATIAL_DITHER_DEPTH, 0,
 			FMT_TEMPORAL_DITHER_EN, 0,
 			FMT_HIGHPASS_RANDOM_ENABLE, 0,
 			FMT_FRAME_RANDOM_ENABLE, 0,
 			FMT_RGB_RANDOM_ENABLE, 0);


 	/* only use FRAME_COUNTER_MAX if frameRandom == 1*/
 	if (params->flags.FRAME_RANDOM == 1) {
 		if (params->flags.SPATIAL_DITHER_DEPTH == 0 || params->flags.SPATIAL_DITHER_DEPTH == 1) {
 			REG_UPDATE_2(FMT_CONTROL,
 					FMT_SPATIAL_DITHER_FRAME_COUNTER_MAX, 15,
 					FMT_SPATIAL_DITHER_FRAME_COUNTER_BIT_SWAP, 2);
 		} else if (params->flags.SPATIAL_DITHER_DEPTH == 2) {
 			REG_UPDATE_2(FMT_CONTROL,
 					FMT_SPATIAL_DITHER_FRAME_COUNTER_MAX, 3,
 					FMT_SPATIAL_DITHER_FRAME_COUNTER_BIT_SWAP, 1);
 		} else {
 			return;
 		}
 	} else {
 		REG_UPDATE_2(FMT_CONTROL,
 				FMT_SPATIAL_DITHER_FRAME_COUNTER_MAX, 0,
 				FMT_SPATIAL_DITHER_FRAME_COUNTER_BIT_SWAP, 0);
 	}

 	/*Set seed for random values for
 	 * spatial dithering for R,G,B channels*/

 	REG_SET(FMT_DITHER_RAND_R_SEED, 0,
 			FMT_RAND_R_SEED, params->r_seed_value);

 	REG_SET(FMT_DITHER_RAND_G_SEED, 0,
 			FMT_RAND_G_SEED, params->g_seed_value);

 	REG_SET(FMT_DITHER_RAND_B_SEED, 0,
 			FMT_RAND_B_SEED, params->b_seed_value);

 	/* FMT_OFFSET_R_Cr  31:16 0x0 Setting the zero
 	 * offset for the R/Cr channel, lower 4LSB
 	 * is forced to zeros. Typically set to 0
 	 * RGB and 0x80000 YCbCr.
 	 */
 	/* FMT_OFFSET_G_Y   31:16 0x0 Setting the zero
 	 * offset for the G/Y  channel, lower 4LSB is
 	 * forced to zeros. Typically set to 0 RGB
 	 * and 0x80000 YCbCr.
 	 */
 	/* FMT_OFFSET_B_Cb  31:16 0x0 Setting the zero
 	 * offset for the B/Cb channel, lower 4LSB is
 	 * forced to zeros. Typically set to 0 RGB and
 	 * 0x80000 YCbCr.
 	 */

 	REG_UPDATE_6(FMT_BIT_DEPTH_CONTROL,
 			/*Enable spatial dithering*/
 			FMT_SPATIAL_DITHER_EN, params->flags.SPATIAL_DITHER_ENABLED,
 			/* Set spatial dithering mode
 			 * (default is Seed patterrn AAAA...)
 			 */
 			FMT_SPATIAL_DITHER_MODE, params->flags.SPATIAL_DITHER_MODE,
 			/*Set spatial dithering bit depth*/
 			FMT_SPATIAL_DITHER_DEPTH, params->flags.SPATIAL_DITHER_DEPTH,
 			/*Disable High pass filter*/
 			FMT_HIGHPASS_RANDOM_ENABLE, params->flags.HIGHPASS_RANDOM,
 			/*Reset only at startup*/
 			FMT_FRAME_RANDOM_ENABLE, params->flags.FRAME_RANDOM,
 			/*Set RGB data dithered with x^28+x^3+1*/
 			FMT_RGB_RANDOM_ENABLE, params->flags.RGB_RANDOM);
 }

 void opp1_program_bit_depth_reduction(
 	struct output_pixel_processor *opp,
 	const struct bit_depth_reduction_params *params)
 {
 	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

 	opp1_set_truncation(oppn10, params);
 	opp1_set_spatial_dither(oppn10, params);
 	/* TODO
 	 * set_temporal_dither(oppn10, params);
 	 */
 }

 /**
  *	set_pixel_encoding
  *
  *	Set Pixel Encoding
  *		0: RGB 4:4:4 or YCbCr 4:4:4 or YOnly
  *		1: YCbCr 4:2:2
  */
 static void opp1_set_pixel_encoding(
 	struct dcn10_opp *oppn10,
 	const struct clamping_and_pixel_encoding_params *params)
 {
 	switch (params->pixel_encoding)	{

 	case PIXEL_ENCODING_RGB:
 	case PIXEL_ENCODING_YCBCR444:
 		REG_UPDATE(FMT_CONTROL, FMT_PIXEL_ENCODING, 0);
 		break;
 	case PIXEL_ENCODING_YCBCR422:
 		REG_UPDATE_3(FMT_CONTROL,
 				FMT_PIXEL_ENCODING, 1,
 				FMT_SUBSAMPLING_MODE, 2,
 				FMT_CBCR_BIT_REDUCTION_BYPASS, 0);
 		break;
 	case PIXEL_ENCODING_YCBCR420:
 		REG_UPDATE(FMT_CONTROL, FMT_PIXEL_ENCODING, 2);
 		break;
 	default:
 		break;
 	}
 }

 /**
  *	Set Clamping
  *	1) Set clamping format based on bpc - 0 for 6bpc (No clamping)
  *		1 for 8 bpc
  *		2 for 10 bpc
  *		3 for 12 bpc
  *		7 for programable
  *	2) Enable clamp if Limited range requested
  */
 static void opp1_set_clamping(
 	struct dcn10_opp *oppn10,
 	const struct clamping_and_pixel_encoding_params *params)
 {
 	REG_UPDATE_2(FMT_CLAMP_CNTL,
 			FMT_CLAMP_DATA_EN, 0,
 			FMT_CLAMP_COLOR_FORMAT, 0);

 	switch (params->clamping_level) {
 	case CLAMPING_FULL_RANGE:
 		REG_UPDATE_2(FMT_CLAMP_CNTL,
 				FMT_CLAMP_DATA_EN, 1,
 				FMT_CLAMP_COLOR_FORMAT, 0);
 		break;
 	case CLAMPING_LIMITED_RANGE_8BPC:
 		REG_UPDATE_2(FMT_CLAMP_CNTL,
 				FMT_CLAMP_DATA_EN, 1,
 				FMT_CLAMP_COLOR_FORMAT, 1);
 		break;
 	case CLAMPING_LIMITED_RANGE_10BPC:
 		REG_UPDATE_2(FMT_CLAMP_CNTL,
 				FMT_CLAMP_DATA_EN, 1,
 				FMT_CLAMP_COLOR_FORMAT, 2);

 		break;
 	case CLAMPING_LIMITED_RANGE_12BPC:
 		REG_UPDATE_2(FMT_CLAMP_CNTL,
 				FMT_CLAMP_DATA_EN, 1,
 				FMT_CLAMP_COLOR_FORMAT, 3);
 		break;
 	case CLAMPING_LIMITED_RANGE_PROGRAMMABLE:
 		/* TODO */
 	default:
 		break;
 	}

 }

 void opp1_set_dyn_expansion(
 	struct output_pixel_processor *opp,
 	enum dc_color_space color_sp,
 	enum dc_color_depth color_dpth,
 	enum signal_type signal)
 {
 	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

 	REG_UPDATE_2(FMT_DYNAMIC_EXP_CNTL,
 			FMT_DYNAMIC_EXP_EN, 0,
 			FMT_DYNAMIC_EXP_MODE, 0);

 	if (opp->dyn_expansion == DYN_EXPANSION_DISABLE)
 		return;

 	/*00 - 10-bit -> 12-bit dynamic expansion*/
 	/*01 - 8-bit  -> 12-bit dynamic expansion*/
 	if (signal == SIGNAL_TYPE_HDMI_TYPE_A ||
 		signal == SIGNAL_TYPE_DISPLAY_PORT ||
 		signal == SIGNAL_TYPE_DISPLAY_PORT_MST ||
 		signal == SIGNAL_TYPE_VIRTUAL) {
 		switch (color_dpth) {
 		case COLOR_DEPTH_888:
 			REG_UPDATE_2(FMT_DYNAMIC_EXP_CNTL,
 				FMT_DYNAMIC_EXP_EN, 1,
 				FMT_DYNAMIC_EXP_MODE, 1);
 			break;
 		case COLOR_DEPTH_101010:
 			REG_UPDATE_2(FMT_DYNAMIC_EXP_CNTL,
 				FMT_DYNAMIC_EXP_EN, 1,
 				FMT_DYNAMIC_EXP_MODE, 0);
 			break;
 		case COLOR_DEPTH_121212:
 			REG_UPDATE_2(FMT_DYNAMIC_EXP_CNTL,
 				FMT_DYNAMIC_EXP_EN, 1,/*otherwise last two bits are zero*/
 				FMT_DYNAMIC_EXP_MODE, 0);
 			break;
 		default:
 			break;
 		}
 	}
 }

 static void opp1_program_clamping_and_pixel_encoding(
 	struct output_pixel_processor *opp,
 	const struct clamping_and_pixel_encoding_params *params)
 {
 	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

 	opp1_set_clamping(oppn10, params);
 	opp1_set_pixel_encoding(oppn10, params);
 }

 void opp1_program_fmt(
 	struct output_pixel_processor *opp,
 	struct bit_depth_reduction_params *fmt_bit_depth,
 	struct clamping_and_pixel_encoding_params *clamping)
 {
 	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

 	if (clamping->pixel_encoding == PIXEL_ENCODING_YCBCR420)
 		REG_UPDATE(FMT_MAP420_MEMORY_CONTROL, FMT_MAP420MEM_PWR_FORCE, 0);

 	/* dithering is affected by <CrtcSourceSelect>, hence should be
 	 * programmed afterwards */
 	opp1_program_bit_depth_reduction(
 		opp,
 		fmt_bit_depth);

 	opp1_program_clamping_and_pixel_encoding(
 		opp,
 		clamping);

 	return;
 }

 void opp1_program_stereo(
 	struct output_pixel_processor *opp,
 	bool enable,
 	const struct dc_crtc_timing *timing)
 {
 	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

 	uint32_t active_width = timing->h_addressable - timing->h_border_right - timing->h_border_right;
 	uint32_t space1_size = timing->v_total - timing->v_addressable;
 	/* TODO: confirm computation of space2_size */
 	uint32_t space2_size = timing->v_total - timing->v_addressable;

 	if (!enable) {
 		active_width = 0;
 		space1_size = 0;
 		space2_size = 0;
 	}

 	/* TODO: for which cases should FMT_STEREOSYNC_OVERRIDE be set? */
 	REG_UPDATE(FMT_CONTROL, FMT_STEREOSYNC_OVERRIDE, 0);

 	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_ACTIVE_WIDTH, active_width);

 	/* Program OPPBUF_3D_VACT_SPACE1_SIZE and OPPBUF_VACT_SPACE2_SIZE registers
 	 * In 3D progressive frames, Vactive space happens only in between the 2 frames,
 	 * so only need to program OPPBUF_3D_VACT_SPACE1_SIZE
 	 * In 3D alternative frames, left and right frames, top and bottom field.
 	 */
 	if (timing->timing_3d_format == TIMING_3D_FORMAT_FRAME_ALTERNATE)
 		REG_UPDATE(OPPBUF_3D_PARAMETERS_0, OPPBUF_3D_VACT_SPACE2_SIZE, space2_size);
 	else
 		REG_UPDATE(OPPBUF_3D_PARAMETERS_0, OPPBUF_3D_VACT_SPACE1_SIZE, space1_size);

 	/* TODO: Is programming of OPPBUF_DUMMY_DATA_R/G/B needed? */
 	/*
 	REG_UPDATE(OPPBUF_3D_PARAMETERS_0,
 			OPPBUF_DUMMY_DATA_R, data_r);
 	REG_UPDATE(OPPBUF_3D_PARAMETERS_1,
 			OPPBUF_DUMMY_DATA_G, data_g);
 	REG_UPDATE(OPPBUF_3D_PARAMETERS_1,
 			OPPBUF_DUMMY_DATA_B, _data_b);
 	*/
 }

 void opp1_program_oppbuf(
 	struct output_pixel_processor *opp,
 	struct oppbuf_params *oppbuf)
 {
 	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

 	/* Program the oppbuf active width to be the frame width from mpc */
 	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_ACTIVE_WIDTH, oppbuf->active_width);

 	/* Specifies the number of segments in multi-segment mode (DP-MSO operation)
 	 * description  "In 1/2/4 segment mode, specifies the horizontal active width in pixels of the display panel.
 	 * In 4 segment split left/right mode, specifies the horizontal 1/2 active width in pixels of the display panel.
 	 * Used to determine segment boundaries in multi-segment mode. Used to determine the width of the vertical active space in 3D frame packed modes.
 	 * OPPBUF_ACTIVE_WIDTH must be integer divisible by the total number of segments."
 	 */
 	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_DISPLAY_SEGMENTATION, oppbuf->mso_segmentation);

 	/* description  "Specifies the number of overlap pixels (1-8 overlapping pixels supported), used in multi-segment mode (DP-MSO operation)" */
 	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_OVERLAP_PIXEL_NUM, oppbuf->mso_overlap_pixel_num);

 	/* description  "Specifies the number of times a pixel is replicated (0-15 pixel replications supported).
 	 * A value of 0 disables replication. The total number of times a pixel is output is OPPBUF_PIXEL_REPETITION + 1."
 	 */
 	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_PIXEL_REPETITION, oppbuf->pixel_repetition);

 	/* Controls the number of padded pixels at the end of a segment */
 	if (REG(OPPBUF_CONTROL1))
 		REG_UPDATE(OPPBUF_CONTROL1, OPPBUF_NUM_SEGMENT_PADDED_PIXELS, oppbuf->num_segment_padded_pixels);
 }

 void opp1_pipe_clock_control(struct output_pixel_processor *opp, bool enable)
 {
 	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);
 	uint32_t regval = enable ? 1 : 0;

 	REG_UPDATE(OPP_PIPE_CONTROL, OPP_PIPE_CLOCK_EN, regval);
 }

 /*****************************************/
 /* Constructor, Destructor               */
 /*****************************************/

 void opp1_destroy(struct output_pixel_processor **opp)
 {
 	kfree(TO_DCN10_OPP(*opp));
 	*opp = NULL;
 }

 static const struct opp_funcs dcn10_opp_funcs = {
 		.opp_set_dyn_expansion = opp1_set_dyn_expansion,
 		.opp_program_fmt = opp1_program_fmt,
 		.opp_program_bit_depth_reduction = opp1_program_bit_depth_reduction,
 		.opp_program_stereo = opp1_program_stereo,
 		.opp_pipe_clock_control = opp1_pipe_clock_control,
 		.opp_set_disp_pattern_generator = NULL,
 		.opp_program_dpg_dimensions = NULL,
 		.dpg_is_blanked = NULL,
 		.opp_destroy = opp1_destroy
 };

 void dcn10_opp_construct(struct dcn10_opp *oppn10,
 	struct dc_context *ctx,
 	uint32_t inst,
 	const struct dcn10_opp_registers *regs,
 	const struct dcn10_opp_shift *opp_shift,
 	const struct dcn10_opp_mask *opp_mask)
 {

 	oppn10->base.ctx = ctx;
 	oppn10->base.inst = inst;
 	oppn10->base.funcs = &dcn10_opp_funcs;

 	oppn10->regs = regs;
 	oppn10->opp_shift = opp_shift;
 	oppn10->opp_mask = opp_mask;
 }
	/*
	* Copyright 2012-15 Advanced Micro Devices, Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*
	* Authors: AMD
	*
	*/

	#include <linux/slab.h>

	#include "dm_services.h"
	#include "dcn10_opp.h"
	#include "reg_helper.h"

	#define REG(reg) \
	(oppn10->regs->reg)

	#undef FN
	#define FN(reg_name, field_name) \
	oppn10->opp_shift->field_name, oppn10->opp_mask->field_name

	#define CTX \
	oppn10->base.ctx


	/*********** FORMATTER **********/

	/**
	* set_truncation
	* 1) set truncation depth: 0 for 18 bpp or 1 for 24 bpp
	* 2) enable truncation
	* 3) HW remove 12bit FMT support for DCE11 power saving reason.
	*/
	static void opp1_set_truncation(
	struct dcn10_opp *oppn10,
	const struct bit_depth_reduction_params *params)
	{
	REG_UPDATE_3(FMT_BIT_DEPTH_CONTROL,
	FMT_TRUNCATE_EN, params->flags.TRUNCATE_ENABLED,
	FMT_TRUNCATE_DEPTH, params->flags.TRUNCATE_DEPTH,
	FMT_TRUNCATE_MODE, params->flags.TRUNCATE_MODE);
	}

	static void opp1_set_spatial_dither(
	struct dcn10_opp *oppn10,
	const struct bit_depth_reduction_params *params)
	{
	/Disable spatial (random) dithering/
	REG_UPDATE_7(FMT_BIT_DEPTH_CONTROL,
	FMT_SPATIAL_DITHER_EN, 0,
	FMT_SPATIAL_DITHER_MODE, 0,
	FMT_SPATIAL_DITHER_DEPTH, 0,
	FMT_TEMPORAL_DITHER_EN, 0,
	FMT_HIGHPASS_RANDOM_ENABLE, 0,
	FMT_FRAME_RANDOM_ENABLE, 0,
	FMT_RGB_RANDOM_ENABLE, 0);


	/* only use FRAME_COUNTER_MAX if frameRandom == 1*/
	if (params->flags.FRAME_RANDOM == 1) {
	if (params->flags.SPATIAL_DITHER_DEPTH == 0 \|\| params->flags.SPATIAL_DITHER_DEPTH == 1) {
	REG_UPDATE_2(FMT_CONTROL,
	FMT_SPATIAL_DITHER_FRAME_COUNTER_MAX, 15,
	FMT_SPATIAL_DITHER_FRAME_COUNTER_BIT_SWAP, 2);
	} else if (params->flags.SPATIAL_DITHER_DEPTH == 2) {
	REG_UPDATE_2(FMT_CONTROL,
	FMT_SPATIAL_DITHER_FRAME_COUNTER_MAX, 3,
	FMT_SPATIAL_DITHER_FRAME_COUNTER_BIT_SWAP, 1);
	} else {
	return;
	}
	} else {
	REG_UPDATE_2(FMT_CONTROL,
	FMT_SPATIAL_DITHER_FRAME_COUNTER_MAX, 0,
	FMT_SPATIAL_DITHER_FRAME_COUNTER_BIT_SWAP, 0);
	}

	/*Set seed for random values for
	* spatial dithering for R,G,B channels*/

	REG_SET(FMT_DITHER_RAND_R_SEED, 0,
	FMT_RAND_R_SEED, params->r_seed_value);

	REG_SET(FMT_DITHER_RAND_G_SEED, 0,
	FMT_RAND_G_SEED, params->g_seed_value);

	REG_SET(FMT_DITHER_RAND_B_SEED, 0,
	FMT_RAND_B_SEED, params->b_seed_value);

	/* FMT_OFFSET_R_Cr 31:16 0x0 Setting the zero
	* offset for the R/Cr channel, lower 4LSB
	* is forced to zeros. Typically set to 0
	* RGB and 0x80000 YCbCr.
	*/
	/* FMT_OFFSET_G_Y 31:16 0x0 Setting the zero
	* offset for the G/Y channel, lower 4LSB is
	* forced to zeros. Typically set to 0 RGB
	* and 0x80000 YCbCr.
	*/
	/* FMT_OFFSET_B_Cb 31:16 0x0 Setting the zero
	* offset for the B/Cb channel, lower 4LSB is
	* forced to zeros. Typically set to 0 RGB and
	* 0x80000 YCbCr.
	*/

	REG_UPDATE_6(FMT_BIT_DEPTH_CONTROL,
	/Enable spatial dithering/
	FMT_SPATIAL_DITHER_EN, params->flags.SPATIAL_DITHER_ENABLED,
	/* Set spatial dithering mode
	* (default is Seed patterrn AAAA...)
	*/
	FMT_SPATIAL_DITHER_MODE, params->flags.SPATIAL_DITHER_MODE,
	/Set spatial dithering bit depth/
	FMT_SPATIAL_DITHER_DEPTH, params->flags.SPATIAL_DITHER_DEPTH,
	/Disable High pass filter/
	FMT_HIGHPASS_RANDOM_ENABLE, params->flags.HIGHPASS_RANDOM,
	/Reset only at startup/
	FMT_FRAME_RANDOM_ENABLE, params->flags.FRAME_RANDOM,
	/Set RGB data dithered with x^28+x^3+1/
	FMT_RGB_RANDOM_ENABLE, params->flags.RGB_RANDOM);
	}

	void opp1_program_bit_depth_reduction(
	struct output_pixel_processor *opp,
	const struct bit_depth_reduction_params *params)
	{
	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

	opp1_set_truncation(oppn10, params);
	opp1_set_spatial_dither(oppn10, params);
	/* TODO
	* set_temporal_dither(oppn10, params);
	*/
	}

	/**
	* set_pixel_encoding
	*
	* Set Pixel Encoding
	* 0: RGB 4:4:4 or YCbCr 4:4:4 or YOnly
	* 1: YCbCr 4:2:2
	*/
	static void opp1_set_pixel_encoding(
	struct dcn10_opp *oppn10,
	const struct clamping_and_pixel_encoding_params *params)
	{
	switch (params->pixel_encoding) {

	case PIXEL_ENCODING_RGB:
	case PIXEL_ENCODING_YCBCR444:
	REG_UPDATE(FMT_CONTROL, FMT_PIXEL_ENCODING, 0);
	break;
	case PIXEL_ENCODING_YCBCR422:
	REG_UPDATE_3(FMT_CONTROL,
	FMT_PIXEL_ENCODING, 1,
	FMT_SUBSAMPLING_MODE, 2,
	FMT_CBCR_BIT_REDUCTION_BYPASS, 0);
	break;
	case PIXEL_ENCODING_YCBCR420:
	REG_UPDATE(FMT_CONTROL, FMT_PIXEL_ENCODING, 2);
	break;
	default:
	break;
	}
	}

	/**
	* Set Clamping
	* 1) Set clamping format based on bpc - 0 for 6bpc (No clamping)
	* 1 for 8 bpc
	* 2 for 10 bpc
	* 3 for 12 bpc
	* 7 for programable
	* 2) Enable clamp if Limited range requested
	*/
	static void opp1_set_clamping(
	struct dcn10_opp *oppn10,
	const struct clamping_and_pixel_encoding_params *params)
	{
	REG_UPDATE_2(FMT_CLAMP_CNTL,
	FMT_CLAMP_DATA_EN, 0,
	FMT_CLAMP_COLOR_FORMAT, 0);

	switch (params->clamping_level) {
	case CLAMPING_FULL_RANGE:
	REG_UPDATE_2(FMT_CLAMP_CNTL,
	FMT_CLAMP_DATA_EN, 1,
	FMT_CLAMP_COLOR_FORMAT, 0);
	break;
	case CLAMPING_LIMITED_RANGE_8BPC:
	REG_UPDATE_2(FMT_CLAMP_CNTL,
	FMT_CLAMP_DATA_EN, 1,
	FMT_CLAMP_COLOR_FORMAT, 1);
	break;
	case CLAMPING_LIMITED_RANGE_10BPC:
	REG_UPDATE_2(FMT_CLAMP_CNTL,
	FMT_CLAMP_DATA_EN, 1,
	FMT_CLAMP_COLOR_FORMAT, 2);

	break;
	case CLAMPING_LIMITED_RANGE_12BPC:
	REG_UPDATE_2(FMT_CLAMP_CNTL,
	FMT_CLAMP_DATA_EN, 1,
	FMT_CLAMP_COLOR_FORMAT, 3);
	break;
	case CLAMPING_LIMITED_RANGE_PROGRAMMABLE:
	/* TODO */
	default:
	break;
	}

	}

	void opp1_set_dyn_expansion(
	struct output_pixel_processor *opp,
	enum dc_color_space color_sp,
	enum dc_color_depth color_dpth,
	enum signal_type signal)
	{
	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

	REG_UPDATE_2(FMT_DYNAMIC_EXP_CNTL,
	FMT_DYNAMIC_EXP_EN, 0,
	FMT_DYNAMIC_EXP_MODE, 0);

	if (opp->dyn_expansion == DYN_EXPANSION_DISABLE)
	return;

	/00 - 10-bit -> 12-bit dynamic expansion/
	/01 - 8-bit -> 12-bit dynamic expansion/
	if (signal == SIGNAL_TYPE_HDMI_TYPE_A \|\|
	signal == SIGNAL_TYPE_DISPLAY_PORT \|\|
	signal == SIGNAL_TYPE_DISPLAY_PORT_MST \|\|
	signal == SIGNAL_TYPE_VIRTUAL) {
	switch (color_dpth) {
	case COLOR_DEPTH_888:
	REG_UPDATE_2(FMT_DYNAMIC_EXP_CNTL,
	FMT_DYNAMIC_EXP_EN, 1,
	FMT_DYNAMIC_EXP_MODE, 1);
	break;
	case COLOR_DEPTH_101010:
	REG_UPDATE_2(FMT_DYNAMIC_EXP_CNTL,
	FMT_DYNAMIC_EXP_EN, 1,
	FMT_DYNAMIC_EXP_MODE, 0);
	break;
	case COLOR_DEPTH_121212:
	REG_UPDATE_2(FMT_DYNAMIC_EXP_CNTL,
	FMT_DYNAMIC_EXP_EN, 1,/otherwise last two bits are zero/
	FMT_DYNAMIC_EXP_MODE, 0);
	break;
	default:
	break;
	}
	}
	}

	static void opp1_program_clamping_and_pixel_encoding(
	struct output_pixel_processor *opp,
	const struct clamping_and_pixel_encoding_params *params)
	{
	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

	opp1_set_clamping(oppn10, params);
	opp1_set_pixel_encoding(oppn10, params);
	}

	void opp1_program_fmt(
	struct output_pixel_processor *opp,
	struct bit_depth_reduction_params *fmt_bit_depth,
	struct clamping_and_pixel_encoding_params *clamping)
	{
	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

	if (clamping->pixel_encoding == PIXEL_ENCODING_YCBCR420)
	REG_UPDATE(FMT_MAP420_MEMORY_CONTROL, FMT_MAP420MEM_PWR_FORCE, 0);

	/* dithering is affected by <CrtcSourceSelect>, hence should be
	* programmed afterwards */
	opp1_program_bit_depth_reduction(
	opp,
	fmt_bit_depth);

	opp1_program_clamping_and_pixel_encoding(
	opp,
	clamping);

	return;
	}

	void opp1_program_stereo(
	struct output_pixel_processor *opp,
	bool enable,
	const struct dc_crtc_timing *timing)
	{
	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

	uint32_t active_width = timing->h_addressable - timing->h_border_right - timing->h_border_right;
	uint32_t space1_size = timing->v_total - timing->v_addressable;
	/* TODO: confirm computation of space2_size */
	uint32_t space2_size = timing->v_total - timing->v_addressable;

	if (!enable) {
	active_width = 0;
	space1_size = 0;
	space2_size = 0;
	}

	/* TODO: for which cases should FMT_STEREOSYNC_OVERRIDE be set? */
	REG_UPDATE(FMT_CONTROL, FMT_STEREOSYNC_OVERRIDE, 0);

	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_ACTIVE_WIDTH, active_width);

	/* Program OPPBUF_3D_VACT_SPACE1_SIZE and OPPBUF_VACT_SPACE2_SIZE registers
	* In 3D progressive frames, Vactive space happens only in between the 2 frames,
	* so only need to program OPPBUF_3D_VACT_SPACE1_SIZE
	* In 3D alternative frames, left and right frames, top and bottom field.
	*/
	if (timing->timing_3d_format == TIMING_3D_FORMAT_FRAME_ALTERNATE)
	REG_UPDATE(OPPBUF_3D_PARAMETERS_0, OPPBUF_3D_VACT_SPACE2_SIZE, space2_size);
	else
	REG_UPDATE(OPPBUF_3D_PARAMETERS_0, OPPBUF_3D_VACT_SPACE1_SIZE, space1_size);

	/* TODO: Is programming of OPPBUF_DUMMY_DATA_R/G/B needed? */
	/*
	REG_UPDATE(OPPBUF_3D_PARAMETERS_0,
	OPPBUF_DUMMY_DATA_R, data_r);
	REG_UPDATE(OPPBUF_3D_PARAMETERS_1,
	OPPBUF_DUMMY_DATA_G, data_g);
	REG_UPDATE(OPPBUF_3D_PARAMETERS_1,
	OPPBUF_DUMMY_DATA_B, _data_b);
	*/
	}

	void opp1_program_oppbuf(
	struct output_pixel_processor *opp,
	struct oppbuf_params *oppbuf)
	{
	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);

	/* Program the oppbuf active width to be the frame width from mpc */
	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_ACTIVE_WIDTH, oppbuf->active_width);

	/* Specifies the number of segments in multi-segment mode (DP-MSO operation)
	* description "In 1/2/4 segment mode, specifies the horizontal active width in pixels of the display panel.
	* In 4 segment split left/right mode, specifies the horizontal 1/2 active width in pixels of the display panel.
	* Used to determine segment boundaries in multi-segment mode. Used to determine the width of the vertical active space in 3D frame packed modes.
	* OPPBUF_ACTIVE_WIDTH must be integer divisible by the total number of segments."
	*/
	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_DISPLAY_SEGMENTATION, oppbuf->mso_segmentation);

	/* description "Specifies the number of overlap pixels (1-8 overlapping pixels supported), used in multi-segment mode (DP-MSO operation)" */
	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_OVERLAP_PIXEL_NUM, oppbuf->mso_overlap_pixel_num);

	/* description "Specifies the number of times a pixel is replicated (0-15 pixel replications supported).
	* A value of 0 disables replication. The total number of times a pixel is output is OPPBUF_PIXEL_REPETITION + 1."
	*/
	REG_UPDATE(OPPBUF_CONTROL, OPPBUF_PIXEL_REPETITION, oppbuf->pixel_repetition);

	/* Controls the number of padded pixels at the end of a segment */
	if (REG(OPPBUF_CONTROL1))
	REG_UPDATE(OPPBUF_CONTROL1, OPPBUF_NUM_SEGMENT_PADDED_PIXELS, oppbuf->num_segment_padded_pixels);
	}

	void opp1_pipe_clock_control(struct output_pixel_processor *opp, bool enable)
	{
	struct dcn10_opp *oppn10 = TO_DCN10_OPP(opp);
	uint32_t regval = enable ? 1 : 0;

	REG_UPDATE(OPP_PIPE_CONTROL, OPP_PIPE_CLOCK_EN, regval);
	}

	/*****************************************/
	/* Constructor, Destructor */
	/*****************************************/

	void opp1_destroy(struct output_pixel_processor **opp)
	{
	kfree(TO_DCN10_OPP(*opp));
	*opp = NULL;
	}

	static const struct opp_funcs dcn10_opp_funcs = {
	.opp_set_dyn_expansion = opp1_set_dyn_expansion,
	.opp_program_fmt = opp1_program_fmt,
	.opp_program_bit_depth_reduction = opp1_program_bit_depth_reduction,
	.opp_program_stereo = opp1_program_stereo,
	.opp_pipe_clock_control = opp1_pipe_clock_control,
	.opp_set_disp_pattern_generator = NULL,
	.opp_program_dpg_dimensions = NULL,
	.dpg_is_blanked = NULL,
	.opp_destroy = opp1_destroy
	};

	void dcn10_opp_construct(struct dcn10_opp *oppn10,
	struct dc_context *ctx,
	uint32_t inst,
	const struct dcn10_opp_registers *regs,
	const struct dcn10_opp_shift *opp_shift,
	const struct dcn10_opp_mask *opp_mask)
	{

	oppn10->base.ctx = ctx;
	oppn10->base.inst = inst;
	oppn10->base.funcs = &dcn10_opp_funcs;

	oppn10->regs = regs;
	oppn10->opp_shift = opp_shift;
	oppn10->opp_mask = opp_mask;
	}