// SPDX-License-Identifier: MIT
/*
 * Copyright © 2018 Intel Corporation
 *
 * Author: Gaurav K Singh <gaurav.k.singh@intel.com>
 *         Manasi Navare <manasi.d.navare@intel.com>
 */
#include <linux/limits.h>

#include <drm/display/drm_dsc_helper.h>

#include "i915_drv.h"
#include "i915_reg.h"
#include "intel_crtc.h"
#include "intel_de.h"
#include "intel_display_types.h"
#include "intel_dsi.h"
#include "intel_qp_tables.h"
#include "intel_vdsc.h"
#include "intel_vdsc_regs.h"

enum ROW_INDEX_BPP {
	ROW_INDEX_6BPP = 0,
	ROW_INDEX_8BPP,
	ROW_INDEX_10BPP,
	ROW_INDEX_12BPP,
	ROW_INDEX_15BPP,
	MAX_ROW_INDEX
};

enum COLUMN_INDEX_BPC {
	COLUMN_INDEX_8BPC = 0,
	COLUMN_INDEX_10BPC,
	COLUMN_INDEX_12BPC,
	COLUMN_INDEX_14BPC,
	COLUMN_INDEX_16BPC,
	MAX_COLUMN_INDEX
};

/* From DSC_v1.11 spec, rc_parameter_Set syntax element typically constant */
static const u16 rc_buf_thresh[] = {
	896, 1792, 2688, 3584, 4480, 5376, 6272, 6720, 7168, 7616,
	7744, 7872, 8000, 8064
};

struct rc_parameters {
	u16 initial_xmit_delay;
	u8 first_line_bpg_offset;
	u16 initial_offset;
	u8 flatness_min_qp;
	u8 flatness_max_qp;
	u8 rc_quant_incr_limit0;
	u8 rc_quant_incr_limit1;
	struct drm_dsc_rc_range_parameters rc_range_params[DSC_NUM_BUF_RANGES];
};

/*
 * Selected Rate Control Related Parameter Recommended Values
 * from DSC_v1.11 spec & C Model release: DSC_model_20161212
 */
static const struct rc_parameters rc_parameters[][MAX_COLUMN_INDEX] = {
{
	/* 6BPP/8BPC */
	{ 768, 15, 6144, 3, 13, 11, 11, {
		{ 0, 4, 0 }, { 1, 6, -2 }, { 3, 8, -2 }, { 4, 8, -4 },
		{ 5, 9, -6 }, { 5, 9, -6 }, { 6, 9, -6 }, { 6, 10, -8 },
		{ 7, 11, -8 }, { 8, 12, -10 }, { 9, 12, -10 }, { 10, 12, -12 },
		{ 10, 12, -12 }, { 11, 12, -12 }, { 13, 14, -12 }
		}
	},
	/* 6BPP/10BPC */
	{ 768, 15, 6144, 7, 17, 15, 15, {
		{ 0, 8, 0 }, { 3, 10, -2 }, { 7, 12, -2 }, { 8, 12, -4 },
		{ 9, 13, -6 }, { 9, 13, -6 }, { 10, 13, -6 }, { 10, 14, -8 },
		{ 11, 15, -8 }, { 12, 16, -10 }, { 13, 16, -10 },
		{ 14, 16, -12 }, { 14, 16, -12 }, { 15, 16, -12 },
		{ 17, 18, -12 }
		}
	},
	/* 6BPP/12BPC */
	{ 768, 15, 6144, 11, 21, 19, 19, {
		{ 0, 12, 0 }, { 5, 14, -2 }, { 11, 16, -2 }, { 12, 16, -4 },
		{ 13, 17, -6 }, { 13, 17, -6 }, { 14, 17, -6 }, { 14, 18, -8 },
		{ 15, 19, -8 }, { 16, 20, -10 }, { 17, 20, -10 },
		{ 18, 20, -12 }, { 18, 20, -12 }, { 19, 20, -12 },
		{ 21, 22, -12 }
		}
	},
	/* 6BPP/14BPC */
	{ 768, 15, 6144, 15, 25, 23, 27, {
		{ 0, 16, 0 }, { 7, 18, -2 }, { 15, 20, -2 }, { 16, 20, -4 },
		{ 17, 21, -6 }, { 17, 21, -6 }, { 18, 21, -6 }, { 18, 22, -8 },
		{ 19, 23, -8 }, { 20, 24, -10 }, { 21, 24, -10 },
		{ 22, 24, -12 }, { 22, 24, -12 }, { 23, 24, -12 },
		{ 25, 26, -12 }
		}
	},
	/* 6BPP/16BPC */
	{ 768, 15, 6144, 19, 29, 27, 27, {
		{ 0, 20, 0 }, { 9, 22, -2 }, { 19, 24, -2 }, { 20, 24, -4 },
		{ 21, 25, -6 }, { 21, 25, -6 }, { 22, 25, -6 }, { 22, 26, -8 },
		{ 23, 27, -8 }, { 24, 28, -10 }, { 25, 28, -10 },
		{ 26, 28, -12 }, { 26, 28, -12 }, { 27, 28, -12 },
		{ 29, 30, -12 }
		}
	},
},
{
	/* 8BPP/8BPC */
	{ 512, 12, 6144, 3, 12, 11, 11, {
		{ 0, 4, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
		{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
		{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 }, { 5, 12, -12 },
		{ 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
		}
	},
	/* 8BPP/10BPC */
	{ 512, 12, 6144, 7, 16, 15, 15, {
		{ 0, 4, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 5, 10, -2 },
		{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
		{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
		{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
		}
	},
	/* 8BPP/12BPC */
	{ 512, 12, 6144, 11, 20, 19, 19, {
		{ 0, 12, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 9, 14, -2 },
		{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
		{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
		{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
		{ 21, 23, -12 }
		}
	},
	/* 8BPP/14BPC */
	{ 512, 12, 6144, 15, 24, 23, 23, {
		{ 0, 12, 0 }, { 5, 13, 0 }, { 11, 15, 0 }, { 12, 17, -2 },
		{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
		{ 15, 21, -8 }, { 15, 22, -10 }, { 17, 22, -10 },
		{ 17, 23, -12 }, { 17, 23, -12 }, { 21, 24, -12 },
		{ 24, 25, -12 }
		}
	},
	/* 8BPP/16BPC */
	{ 512, 12, 6144, 19, 28, 27, 27, {
		{ 0, 12, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 15, 20, -2 },
		{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
		{ 19, 25, -8 }, { 19, 26, -10 }, { 21, 26, -10 },
		{ 21, 27, -12 }, { 21, 27, -12 }, { 25, 28, -12 },
		{ 28, 29, -12 }
		}
	},
},
{
	/* 10BPP/8BPC */
	{ 410, 15, 5632, 3, 12, 11, 11, {
		{ 0, 3, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 2, 6, -2 },
		{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
		{ 3, 9, -8 }, { 3, 9, -10 }, { 5, 10, -10 }, { 5, 10, -10 },
		{ 5, 11, -12 }, { 7, 11, -12 }, { 11, 12, -12 }
		}
	},
	/* 10BPP/10BPC */
	{ 410, 15, 5632, 7, 16, 15, 15, {
		{ 0, 7, 2 }, { 4, 8, 0 }, { 5, 9, 0 }, { 6, 10, -2 },
		{ 7, 11, -4 }, { 7, 11, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
		{ 7, 13, -8 }, { 7, 13, -10 }, { 9, 14, -10 }, { 9, 14, -10 },
		{ 9, 15, -12 }, { 11, 15, -12 }, { 15, 16, -12 }
		}
	},
	/* 10BPP/12BPC */
	{ 410, 15, 5632, 11, 20, 19, 19, {
		{ 0, 11, 2 }, { 4, 12, 0 }, { 9, 13, 0 }, { 10, 14, -2 },
		{ 11, 15, -4 }, { 11, 15, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
		{ 11, 17, -8 }, { 11, 17, -10 }, { 13, 18, -10 },
		{ 13, 18, -10 }, { 13, 19, -12 }, { 15, 19, -12 },
		{ 19, 20, -12 }
		}
	},
	/* 10BPP/14BPC */
	{ 410, 15, 5632, 15, 24, 23, 23, {
		{ 0, 11, 2 }, { 5, 13, 0 }, { 11, 15, 0 }, { 13, 18, -2 },
		{ 15, 19, -4 }, { 15, 19, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
		{ 15, 21, -8 }, { 15, 21, -10 }, { 17, 22, -10 },
		{ 17, 22, -10 }, { 17, 23, -12 }, { 19, 23, -12 },
		{ 23, 24, -12 }
		}
	},
	/* 10BPP/16BPC */
	{ 410, 15, 5632, 19, 28, 27, 27, {
		{ 0, 11, 2 }, { 6, 14, 0 }, { 13, 17, 0 }, { 16, 20, -2 },
		{ 19, 23, -4 }, { 19, 23, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
		{ 19, 25, -8 }, { 19, 25, -10 }, { 21, 26, -10 },
		{ 21, 26, -10 }, { 21, 27, -12 }, { 23, 27, -12 },
		{ 27, 28, -12 }
		}
	},
},
{
	/* 12BPP/8BPC */
	{ 341, 15, 2048, 3, 12, 11, 11, {
		{ 0, 2, 2 }, { 0, 4, 0 }, { 1, 5, 0 }, { 1, 6, -2 },
		{ 3, 7, -4 }, { 3, 7, -6 }, { 3, 7, -8 }, { 3, 8, -8 },
		{ 3, 9, -8 }, { 3, 10, -10 }, { 5, 11, -10 },
		{ 5, 12, -12 }, { 5, 13, -12 }, { 7, 13, -12 }, { 13, 15, -12 }
		}
	},
	/* 12BPP/10BPC */
	{ 341, 15, 2048, 7, 16, 15, 15, {
		{ 0, 2, 2 }, { 2, 5, 0 }, { 3, 7, 0 }, { 4, 8, -2 },
		{ 6, 9, -4 }, { 7, 10, -6 }, { 7, 11, -8 }, { 7, 12, -8 },
		{ 7, 13, -8 }, { 7, 14, -10 }, { 9, 15, -10 }, { 9, 16, -12 },
		{ 9, 17, -12 }, { 11, 17, -12 }, { 17, 19, -12 }
		}
	},
	/* 12BPP/12BPC */
	{ 341, 15, 2048, 11, 20, 19, 19, {
		{ 0, 6, 2 }, { 4, 9, 0 }, { 7, 11, 0 }, { 8, 12, -2 },
		{ 10, 13, -4 }, { 11, 14, -6 }, { 11, 15, -8 }, { 11, 16, -8 },
		{ 11, 17, -8 }, { 11, 18, -10 }, { 13, 19, -10 },
		{ 13, 20, -12 }, { 13, 21, -12 }, { 15, 21, -12 },
		{ 21, 23, -12 }
		}
	},
	/* 12BPP/14BPC */
	{ 341, 15, 2048, 15, 24, 23, 23, {
		{ 0, 6, 2 }, { 7, 10, 0 }, { 9, 13, 0 }, { 11, 16, -2 },
		{ 14, 17, -4 }, { 15, 18, -6 }, { 15, 19, -8 }, { 15, 20, -8 },
		{ 15, 20, -8 }, { 15, 21, -10 }, { 17, 21, -10 },
		{ 17, 21, -12 }, { 17, 21, -12 }, { 19, 22, -12 },
		{ 22, 23, -12 }
		}
	},
	/* 12BPP/16BPC */
	{ 341, 15, 2048, 19, 28, 27, 27, {
		{ 0, 6, 2 }, { 6, 11, 0 }, { 11, 15, 0 }, { 14, 18, -2 },
		{ 18, 21, -4 }, { 19, 22, -6 }, { 19, 23, -8 }, { 19, 24, -8 },
		{ 19, 24, -8 }, { 19, 25, -10 }, { 21, 25, -10 },
		{ 21, 25, -12 }, { 21, 25, -12 }, { 23, 26, -12 },
		{ 26, 27, -12 }
		}
	},
},
{
	/* 15BPP/8BPC */
	{ 273, 15, 2048, 3, 12, 11, 11, {
		{ 0, 0, 10 }, { 0, 1, 8 }, { 0, 1, 6 }, { 0, 2, 4 },
		{ 1, 2, 2 }, { 1, 3, 0 }, { 1, 3, -2 }, { 2, 4, -4 },
		{ 2, 5, -6 }, { 3, 5, -8 }, { 4, 6, -10 }, { 4, 7, -10 },
		{ 5, 7, -12 }, { 7, 8, -12 }, { 8, 9, -12 }
		}
	},
	/* 15BPP/10BPC */
	{ 273, 15, 2048, 7, 16, 15, 15, {
		{ 0, 2, 10 }, { 2, 5, 8 }, { 3, 5, 6 }, { 4, 6, 4 },
		{ 5, 6, 2 }, { 5, 7, 0 }, { 5, 7, -2 }, { 6, 8, -4 },
		{ 6, 9, -6 }, { 7, 9, -8 }, { 8, 10, -10 }, { 8, 11, -10 },
		{ 9, 11, -12 }, { 11, 12, -12 }, { 12, 13, -12 }
		}
	},
	/* 15BPP/12BPC */
	{ 273, 15, 2048, 11, 20, 19, 19, {
		{ 0, 4, 10 }, { 2, 7, 8 }, { 4, 9, 6 }, { 6, 11, 4 },
		{ 9, 11, 2 }, { 9, 11, 0 }, { 9, 12, -2 }, { 10, 12, -4 },
		{ 11, 13, -6 }, { 11, 13, -8 }, { 12, 14, -10 },
		{ 13, 15, -10 }, { 13, 15, -12 }, { 15, 16, -12 },
		{ 16, 17, -12 }
		}
	},
	/* 15BPP/14BPC */
	{ 273, 15, 2048, 15, 24, 23, 23, {
		{ 0, 4, 10 }, { 3, 8, 8 }, { 6, 11, 6 }, { 9, 14, 4 },
		{ 13, 15, 2 }, { 13, 15, 0 }, { 13, 16, -2 }, { 14, 16, -4 },
		{ 15, 17, -6 }, { 15, 17, -8 }, { 16, 18, -10 },
		{ 17, 19, -10 }, { 17, 19, -12 }, { 19, 20, -12 },
		{ 20, 21, -12 }
		}
	},
	/* 15BPP/16BPC */
	{ 273, 15, 2048, 19, 28, 27, 27, {
		{ 0, 4, 10 }, { 4, 9, 8 }, { 8, 13, 6 }, { 12, 17, 4 },
		{ 17, 19, 2 }, { 17, 20, 0 }, { 17, 20, -2 }, { 18, 20, -4 },
		{ 19, 21, -6 }, { 19, 21, -8 }, { 20, 22, -10 },
		{ 21, 23, -10 }, { 21, 23, -12 }, { 23, 24, -12 },
		{ 24, 25, -12 }
		}
	}
}

};

static int get_row_index_for_rc_params(u16 compressed_bpp)
{
	switch (compressed_bpp) {
	case 6:
		return ROW_INDEX_6BPP;
	case 8:
		return ROW_INDEX_8BPP;
	case 10:
		return ROW_INDEX_10BPP;
	case 12:
		return ROW_INDEX_12BPP;
	case 15:
		return ROW_INDEX_15BPP;
	default:
		return -EINVAL;
	}
}

static int get_column_index_for_rc_params(u8 bits_per_component)
{
	switch (bits_per_component) {
	case 8:
		return COLUMN_INDEX_8BPC;
	case 10:
		return COLUMN_INDEX_10BPC;
	case 12:
		return COLUMN_INDEX_12BPC;
	case 14:
		return COLUMN_INDEX_14BPC;
	case 16:
		return COLUMN_INDEX_16BPC;
	default:
		return -EINVAL;
	}
}

static const struct rc_parameters *get_rc_params(u16 compressed_bpp,
						 u8 bits_per_component)
{
	int row_index, column_index;

	row_index = get_row_index_for_rc_params(compressed_bpp);
	if (row_index < 0)
		return NULL;

	column_index = get_column_index_for_rc_params(bits_per_component);
	if (column_index < 0)
		return NULL;

	return &rc_parameters[row_index][column_index];
}

bool intel_dsc_source_support(const struct intel_crtc_state *crtc_state)
{
	const struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;

	if (!HAS_DSC(i915))
		return false;

	if (DISPLAY_VER(i915) == 11 && cpu_transcoder == TRANSCODER_A)
		return false;

	return true;
}

static bool is_pipe_dsc(struct intel_crtc *crtc, enum transcoder cpu_transcoder)
{
	struct drm_i915_private *i915 = to_i915(crtc->base.dev);

	if (DISPLAY_VER(i915) >= 12)
		return true;

	if (cpu_transcoder == TRANSCODER_EDP ||
	    cpu_transcoder == TRANSCODER_DSI_0 ||
	    cpu_transcoder == TRANSCODER_DSI_1)
		return false;

	/* There's no pipe A DSC engine on ICL */
	drm_WARN_ON(&i915->drm, crtc->pipe == PIPE_A);

	return true;
}

static void
calculate_rc_params(struct rc_parameters *rc,
		    struct drm_dsc_config *vdsc_cfg)
{
	int bpc = vdsc_cfg->bits_per_component;
	int bpp = vdsc_cfg->bits_per_pixel >> 4;
	static const s8 ofs_und6[] = {
		0, -2, -2, -4, -6, -6, -8, -8, -8, -10, -10, -12, -12, -12, -12
	};
	static const s8 ofs_und8[] = {
		2, 0, 0, -2, -4, -6, -8, -8, -8, -10, -10, -10, -12, -12, -12
	};
	static const s8 ofs_und12[] = {
		2, 0, 0, -2, -4, -6, -8, -8, -8, -10, -10, -10, -12, -12, -12
	};
	static const s8 ofs_und15[] = {
		10, 8, 6, 4, 2, 0, -2, -4, -6, -8, -10, -10, -12, -12, -12
	};
	int qp_bpc_modifier = (bpc - 8) * 2;
	u32 res, buf_i, bpp_i;

	if (vdsc_cfg->slice_height >= 8)
		rc->first_line_bpg_offset =
			12 + DIV_ROUND_UP((9 * min(34, vdsc_cfg->slice_height - 8)), 100);
	else
		rc->first_line_bpg_offset = 2 * (vdsc_cfg->slice_height - 1);

	/* Our hw supports only 444 modes as of today */
	if (bpp >= 12)
		rc->initial_offset = 2048;
	else if (bpp >= 10)
		rc->initial_offset = 5632 - DIV_ROUND_UP(((bpp - 10) * 3584), 2);
	else if (bpp >= 8)
		rc->initial_offset = 6144 - DIV_ROUND_UP(((bpp - 8) * 512), 2);
	else
		rc->initial_offset = 6144;

	/* initial_xmit_delay = rc_model_size/2/compression_bpp */
	rc->initial_xmit_delay = DIV_ROUND_UP(DSC_RC_MODEL_SIZE_CONST, 2 * bpp);

	rc->flatness_min_qp = 3 + qp_bpc_modifier;
	rc->flatness_max_qp = 12 + qp_bpc_modifier;

	rc->rc_quant_incr_limit0 = 11 + qp_bpc_modifier;
	rc->rc_quant_incr_limit1 = 11 + qp_bpc_modifier;

	bpp_i  = (2 * (bpp - 6));
	for (buf_i = 0; buf_i < DSC_NUM_BUF_RANGES; buf_i++) {
		/* Read range_minqp and range_max_qp from qp tables */
		rc->rc_range_params[buf_i].range_min_qp =
			intel_lookup_range_min_qp(bpc, buf_i, bpp_i, vdsc_cfg->native_420);
		rc->rc_range_params[buf_i].range_max_qp =
			intel_lookup_range_max_qp(bpc, buf_i, bpp_i, vdsc_cfg->native_420);

		/* Calculate range_bgp_offset */
		if (bpp <= 6) {
			rc->rc_range_params[buf_i].range_bpg_offset = ofs_und6[buf_i];
		} else if (bpp <= 8) {
			res = DIV_ROUND_UP(((bpp - 6) * (ofs_und8[buf_i] - ofs_und6[buf_i])), 2);
			rc->rc_range_params[buf_i].range_bpg_offset =
								ofs_und6[buf_i] + res;
		} else if (bpp <= 12) {
			rc->rc_range_params[buf_i].range_bpg_offset =
								ofs_und8[buf_i];
		} else if (bpp <= 15) {
			res = DIV_ROUND_UP(((bpp - 12) * (ofs_und15[buf_i] - ofs_und12[buf_i])), 3);
			rc->rc_range_params[buf_i].range_bpg_offset =
								ofs_und12[buf_i] + res;
		} else {
			rc->rc_range_params[buf_i].range_bpg_offset =
								ofs_und15[buf_i];
		}
	}
}

static int intel_dsc_slice_dimensions_valid(struct intel_crtc_state *pipe_config,
					    struct drm_dsc_config *vdsc_cfg)
{
	if (pipe_config->output_format == INTEL_OUTPUT_FORMAT_RGB ||
	    pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) {
		if (vdsc_cfg->slice_height > 4095)
			return -EINVAL;
		if (vdsc_cfg->slice_height * vdsc_cfg->slice_width < 15000)
			return -EINVAL;
	} else if (pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420) {
		if (vdsc_cfg->slice_width % 2)
			return -EINVAL;
		if (vdsc_cfg->slice_height % 2)
			return -EINVAL;
		if (vdsc_cfg->slice_height > 4094)
			return -EINVAL;
		if (vdsc_cfg->slice_height * vdsc_cfg->slice_width < 30000)
			return -EINVAL;
	}

	return 0;
}

int intel_dsc_compute_params(struct intel_crtc_state *pipe_config)
{
	struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
	struct drm_dsc_config *vdsc_cfg = &pipe_config->dsc.config;
	u16 compressed_bpp = pipe_config->dsc.compressed_bpp;
	const struct rc_parameters *rc_params;
	struct rc_parameters *rc = NULL;
	int err;
	u8 i = 0;

	vdsc_cfg->pic_width = pipe_config->hw.adjusted_mode.crtc_hdisplay;
	vdsc_cfg->slice_width = DIV_ROUND_UP(vdsc_cfg->pic_width,
					     pipe_config->dsc.slice_count);

	err = intel_dsc_slice_dimensions_valid(pipe_config, vdsc_cfg);

	if (err) {
		drm_dbg_kms(&dev_priv->drm, "Slice dimension requirements not met\n");
		return err;
	}

	/*
	 * According to DSC 1.2 specs if colorspace is YCbCr then convert_rgb is 0
	 * else 1
	 */
	vdsc_cfg->convert_rgb = pipe_config->output_format != INTEL_OUTPUT_FORMAT_YCBCR420 &&
				pipe_config->output_format != INTEL_OUTPUT_FORMAT_YCBCR444;

	if (DISPLAY_VER(dev_priv) >= 14 &&
	    pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
		vdsc_cfg->native_420 = true;
	/* We do not support YcBCr422 as of now */
	vdsc_cfg->native_422 = false;
	vdsc_cfg->simple_422 = false;
	/* Gen 11 does not support VBR */
	vdsc_cfg->vbr_enable = false;

	/* Gen 11 only supports integral values of bpp */
	vdsc_cfg->bits_per_pixel = compressed_bpp << 4;

	/*
	 * According to DSC 1.2 specs in Section 4.1 if native_420 is set:
	 * -We need to double the current bpp.
	 * -second_line_bpg_offset is 12 in general and equal to 2*(slice_height-1) if slice
	 * height < 8.
	 * -second_line_offset_adj is 512 as shown by emperical values to yeild best chroma
	 * preservation in second line.
	 * -nsl_bpg_offset is calculated as second_line_offset/slice_height -1 then rounded
	 * up to 16 fractional bits, we left shift second line offset by 11 to preserve 11
	 * fractional bits.
	 */
	if (vdsc_cfg->native_420) {
		vdsc_cfg->bits_per_pixel <<= 1;

		if (vdsc_cfg->slice_height >= 8)
			vdsc_cfg->second_line_bpg_offset = 12;
		else
			vdsc_cfg->second_line_bpg_offset =
				2 * (vdsc_cfg->slice_height - 1);

		vdsc_cfg->second_line_offset_adj = 512;
		vdsc_cfg->nsl_bpg_offset = DIV_ROUND_UP(vdsc_cfg->second_line_bpg_offset << 11,
							vdsc_cfg->slice_height - 1);
	}

	vdsc_cfg->bits_per_component = pipe_config->pipe_bpp / 3;

	for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++) {
		/*
		 * six 0s are appended to the lsb of each threshold value
		 * internally in h/w.
		 * Only 8 bits are allowed for programming RcBufThreshold
		 */
		vdsc_cfg->rc_buf_thresh[i] = rc_buf_thresh[i] >> 6;
	}

	/*
	 * For 6bpp, RC Buffer threshold 12 and 13 need a different value
	 * as per C Model
	 */
	if (compressed_bpp == 6) {
		vdsc_cfg->rc_buf_thresh[12] = 0x7C;
		vdsc_cfg->rc_buf_thresh[13] = 0x7D;
	}

	/*
	 * From XE_LPD onwards we supports compression bpps in steps of 1
	 * upto uncompressed bpp-1, hence add calculations for all the rc
	 * parameters
	 */
	if (DISPLAY_VER(dev_priv) >= 13) {
		rc = kmalloc(sizeof(*rc), GFP_KERNEL);
		if (!rc)
			return -ENOMEM;

		calculate_rc_params(rc, vdsc_cfg);
		rc_params = rc;
	} else {
		rc_params = get_rc_params(compressed_bpp,
					  vdsc_cfg->bits_per_component);
		if (!rc_params)
			return -EINVAL;
	}

	vdsc_cfg->first_line_bpg_offset = rc_params->first_line_bpg_offset;
	vdsc_cfg->initial_xmit_delay = rc_params->initial_xmit_delay;
	vdsc_cfg->initial_offset = rc_params->initial_offset;
	vdsc_cfg->flatness_min_qp = rc_params->flatness_min_qp;
	vdsc_cfg->flatness_max_qp = rc_params->flatness_max_qp;
	vdsc_cfg->rc_quant_incr_limit0 = rc_params->rc_quant_incr_limit0;
	vdsc_cfg->rc_quant_incr_limit1 = rc_params->rc_quant_incr_limit1;

	for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
		vdsc_cfg->rc_range_params[i].range_min_qp =
			rc_params->rc_range_params[i].range_min_qp;
		vdsc_cfg->rc_range_params[i].range_max_qp =
			rc_params->rc_range_params[i].range_max_qp;
		/*
		 * Range BPG Offset uses 2's complement and is only a 6 bits. So
		 * mask it to get only 6 bits.
		 */
		vdsc_cfg->rc_range_params[i].range_bpg_offset =
			rc_params->rc_range_params[i].range_bpg_offset &
			DSC_RANGE_BPG_OFFSET_MASK;
	}

	/*
	 * BitsPerComponent value determines mux_word_size:
	 * When BitsPerComponent is less than or 10bpc, muxWordSize will be equal to
	 * 48 bits otherwise 64
	 */
	if (vdsc_cfg->bits_per_component <= 10)
		vdsc_cfg->mux_word_size = DSC_MUX_WORD_SIZE_8_10_BPC;
	else
		vdsc_cfg->mux_word_size = DSC_MUX_WORD_SIZE_12_BPC;

	/* InitialScaleValue is a 6 bit value with 3 fractional bits (U3.3) */
	vdsc_cfg->initial_scale_value = (vdsc_cfg->rc_model_size << 3) /
		(vdsc_cfg->rc_model_size - vdsc_cfg->initial_offset);

	kfree(rc);

	return 0;
}

enum intel_display_power_domain
intel_dsc_power_domain(struct intel_crtc *crtc, enum transcoder cpu_transcoder)
{
	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
	enum pipe pipe = crtc->pipe;

	/*
	 * VDSC/joining uses a separate power well, PW2, and requires
	 * POWER_DOMAIN_TRANSCODER_VDSC_PW2 power domain in two cases:
	 *
	 *  - ICL eDP/DSI transcoder
	 *  - Display version 12 (except RKL) pipe A
	 *
	 * For any other pipe, VDSC/joining uses the power well associated with
	 * the pipe in use. Hence another reference on the pipe power domain
	 * will suffice. (Except no VDSC/joining on ICL pipe A.)
	 */
	if (DISPLAY_VER(i915) == 12 && !IS_ROCKETLAKE(i915) && pipe == PIPE_A)
		return POWER_DOMAIN_TRANSCODER_VDSC_PW2;
	else if (is_pipe_dsc(crtc, cpu_transcoder))
		return POWER_DOMAIN_PIPE(pipe);
	else
		return POWER_DOMAIN_TRANSCODER_VDSC_PW2;
}

static void intel_dsc_pps_configure(const struct intel_crtc_state *crtc_state)
{
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
	const struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
	enum pipe pipe = crtc->pipe;
	u32 pps_val = 0;
	u32 rc_buf_thresh_dword[4];
	u32 rc_range_params_dword[8];
	u8 num_vdsc_instances = (crtc_state->dsc.dsc_split) ? 2 : 1;
	int i = 0;

	if (crtc_state->bigjoiner_pipes)
		num_vdsc_instances *= 2;

	/* Populate PICTURE_PARAMETER_SET_0 registers */
	pps_val = DSC_VER_MAJ | vdsc_cfg->dsc_version_minor <<
		DSC_VER_MIN_SHIFT |
		vdsc_cfg->bits_per_component << DSC_BPC_SHIFT |
		vdsc_cfg->line_buf_depth << DSC_LINE_BUF_DEPTH_SHIFT;
	if (vdsc_cfg->dsc_version_minor == 2) {
		pps_val |= DSC_ALT_ICH_SEL;
		if (vdsc_cfg->native_420)
			pps_val |= DSC_NATIVE_420_ENABLE;
		if (vdsc_cfg->native_422)
			pps_val |= DSC_NATIVE_422_ENABLE;
	}
	if (vdsc_cfg->block_pred_enable)
		pps_val |= DSC_BLOCK_PREDICTION;
	if (vdsc_cfg->convert_rgb)
		pps_val |= DSC_COLOR_SPACE_CONVERSION;
	if (vdsc_cfg->simple_422)
		pps_val |= DSC_422_ENABLE;
	if (vdsc_cfg->vbr_enable)
		pps_val |= DSC_VBR_ENABLE;
	drm_dbg_kms(&dev_priv->drm, "PPS0 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_0,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_0,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_0(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_0(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_1 registers */
	pps_val = 0;
	pps_val |= DSC_BPP(vdsc_cfg->bits_per_pixel);
	drm_dbg_kms(&dev_priv->drm, "PPS1 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_1,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_1,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_1(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_1(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_2 registers */
	pps_val = 0;
	pps_val |= DSC_PIC_HEIGHT(vdsc_cfg->pic_height) |
		DSC_PIC_WIDTH(vdsc_cfg->pic_width / num_vdsc_instances);
	drm_dbg_kms(&dev_priv->drm, "PPS2 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_2,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_2,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_2(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_2(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_3 registers */
	pps_val = 0;
	pps_val |= DSC_SLICE_HEIGHT(vdsc_cfg->slice_height) |
		DSC_SLICE_WIDTH(vdsc_cfg->slice_width);
	drm_dbg_kms(&dev_priv->drm, "PPS3 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_3,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_3,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_3(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_3(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_4 registers */
	pps_val = 0;
	pps_val |= DSC_INITIAL_XMIT_DELAY(vdsc_cfg->initial_xmit_delay) |
		DSC_INITIAL_DEC_DELAY(vdsc_cfg->initial_dec_delay);
	drm_dbg_kms(&dev_priv->drm, "PPS4 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_4,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_4,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_4(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_4(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_5 registers */
	pps_val = 0;
	pps_val |= DSC_SCALE_INC_INT(vdsc_cfg->scale_increment_interval) |
		DSC_SCALE_DEC_INT(vdsc_cfg->scale_decrement_interval);
	drm_dbg_kms(&dev_priv->drm, "PPS5 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_5,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_5,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_5(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_5(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_6 registers */
	pps_val = 0;
	pps_val |= DSC_INITIAL_SCALE_VALUE(vdsc_cfg->initial_scale_value) |
		DSC_FIRST_LINE_BPG_OFFSET(vdsc_cfg->first_line_bpg_offset) |
		DSC_FLATNESS_MIN_QP(vdsc_cfg->flatness_min_qp) |
		DSC_FLATNESS_MAX_QP(vdsc_cfg->flatness_max_qp);
	drm_dbg_kms(&dev_priv->drm, "PPS6 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_6,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_6,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_6(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_6(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_7 registers */
	pps_val = 0;
	pps_val |= DSC_SLICE_BPG_OFFSET(vdsc_cfg->slice_bpg_offset) |
		DSC_NFL_BPG_OFFSET(vdsc_cfg->nfl_bpg_offset);
	drm_dbg_kms(&dev_priv->drm, "PPS7 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_7,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_7,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_7(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_7(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_8 registers */
	pps_val = 0;
	pps_val |= DSC_FINAL_OFFSET(vdsc_cfg->final_offset) |
		DSC_INITIAL_OFFSET(vdsc_cfg->initial_offset);
	drm_dbg_kms(&dev_priv->drm, "PPS8 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_8,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_8,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_8(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_8(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_9 registers */
	pps_val = 0;
	pps_val |= DSC_RC_MODEL_SIZE(vdsc_cfg->rc_model_size) |
		DSC_RC_EDGE_FACTOR(DSC_RC_EDGE_FACTOR_CONST);
	drm_dbg_kms(&dev_priv->drm, "PPS9 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_9,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv, DSCC_PICTURE_PARAMETER_SET_9,
				       pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_9(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_9(pipe),
				       pps_val);
	}

	/* Populate PICTURE_PARAMETER_SET_10 registers */
	pps_val = 0;
	pps_val |= DSC_RC_QUANT_INC_LIMIT0(vdsc_cfg->rc_quant_incr_limit0) |
		DSC_RC_QUANT_INC_LIMIT1(vdsc_cfg->rc_quant_incr_limit1) |
		DSC_RC_TARGET_OFF_HIGH(DSC_RC_TGT_OFFSET_HI_CONST) |
		DSC_RC_TARGET_OFF_LOW(DSC_RC_TGT_OFFSET_LO_CONST);
	drm_dbg_kms(&dev_priv->drm, "PPS10 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_10,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       DSCC_PICTURE_PARAMETER_SET_10, pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_10(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_10(pipe),
				       pps_val);
	}

	/* Populate Picture parameter set 16 */
	pps_val = 0;
	pps_val |= DSC_SLICE_CHUNK_SIZE(vdsc_cfg->slice_chunk_size) |
		DSC_SLICE_PER_LINE((vdsc_cfg->pic_width / num_vdsc_instances) /
				   vdsc_cfg->slice_width) |
		DSC_SLICE_ROW_PER_FRAME(vdsc_cfg->pic_height /
					vdsc_cfg->slice_height);
	drm_dbg_kms(&dev_priv->drm, "PPS16 = 0x%08x\n", pps_val);
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_PICTURE_PARAMETER_SET_16,
			       pps_val);
		/*
		 * If 2 VDSC instances are needed, configure PPS for second
		 * VDSC
		 */
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       DSCC_PICTURE_PARAMETER_SET_16, pps_val);
	} else {
		intel_de_write(dev_priv,
			       ICL_DSC0_PICTURE_PARAMETER_SET_16(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       ICL_DSC1_PICTURE_PARAMETER_SET_16(pipe),
				       pps_val);
	}

	if (DISPLAY_VER(dev_priv) >= 14) {
		/* Populate PICTURE_PARAMETER_SET_17 registers */
		pps_val = 0;
		pps_val |= DSC_SL_BPG_OFFSET(vdsc_cfg->second_line_bpg_offset);
		drm_dbg_kms(&dev_priv->drm, "PPS17 = 0x%08x\n", pps_val);
		intel_de_write(dev_priv,
			       MTL_DSC0_PICTURE_PARAMETER_SET_17(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       MTL_DSC1_PICTURE_PARAMETER_SET_17(pipe),
				       pps_val);

		/* Populate PICTURE_PARAMETER_SET_18 registers */
		pps_val = 0;
		pps_val |= DSC_NSL_BPG_OFFSET(vdsc_cfg->nsl_bpg_offset) |
			   DSC_SL_OFFSET_ADJ(vdsc_cfg->second_line_offset_adj);
		drm_dbg_kms(&dev_priv->drm, "PPS18 = 0x%08x\n", pps_val);
		intel_de_write(dev_priv,
			       MTL_DSC0_PICTURE_PARAMETER_SET_18(pipe),
			       pps_val);
		if (crtc_state->dsc.dsc_split)
			intel_de_write(dev_priv,
				       MTL_DSC1_PICTURE_PARAMETER_SET_18(pipe),
				       pps_val);
	}

	/* Populate the RC_BUF_THRESH registers */
	memset(rc_buf_thresh_dword, 0, sizeof(rc_buf_thresh_dword));
	for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++) {
		rc_buf_thresh_dword[i / 4] |=
			(u32)(vdsc_cfg->rc_buf_thresh[i] <<
			      BITS_PER_BYTE * (i % 4));
		drm_dbg_kms(&dev_priv->drm, "RC_BUF_THRESH_%d = 0x%08x\n", i,
			    rc_buf_thresh_dword[i / 4]);
	}
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_RC_BUF_THRESH_0,
			       rc_buf_thresh_dword[0]);
		intel_de_write(dev_priv, DSCA_RC_BUF_THRESH_0_UDW,
			       rc_buf_thresh_dword[1]);
		intel_de_write(dev_priv, DSCA_RC_BUF_THRESH_1,
			       rc_buf_thresh_dword[2]);
		intel_de_write(dev_priv, DSCA_RC_BUF_THRESH_1_UDW,
			       rc_buf_thresh_dword[3]);
		if (crtc_state->dsc.dsc_split) {
			intel_de_write(dev_priv, DSCC_RC_BUF_THRESH_0,
				       rc_buf_thresh_dword[0]);
			intel_de_write(dev_priv, DSCC_RC_BUF_THRESH_0_UDW,
				       rc_buf_thresh_dword[1]);
			intel_de_write(dev_priv, DSCC_RC_BUF_THRESH_1,
				       rc_buf_thresh_dword[2]);
			intel_de_write(dev_priv, DSCC_RC_BUF_THRESH_1_UDW,
				       rc_buf_thresh_dword[3]);
		}
	} else {
		intel_de_write(dev_priv, ICL_DSC0_RC_BUF_THRESH_0(pipe),
			       rc_buf_thresh_dword[0]);
		intel_de_write(dev_priv, ICL_DSC0_RC_BUF_THRESH_0_UDW(pipe),
			       rc_buf_thresh_dword[1]);
		intel_de_write(dev_priv, ICL_DSC0_RC_BUF_THRESH_1(pipe),
			       rc_buf_thresh_dword[2]);
		intel_de_write(dev_priv, ICL_DSC0_RC_BUF_THRESH_1_UDW(pipe),
			       rc_buf_thresh_dword[3]);
		if (crtc_state->dsc.dsc_split) {
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_BUF_THRESH_0(pipe),
				       rc_buf_thresh_dword[0]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_BUF_THRESH_0_UDW(pipe),
				       rc_buf_thresh_dword[1]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_BUF_THRESH_1(pipe),
				       rc_buf_thresh_dword[2]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_BUF_THRESH_1_UDW(pipe),
				       rc_buf_thresh_dword[3]);
		}
	}

	/* Populate the RC_RANGE_PARAMETERS registers */
	memset(rc_range_params_dword, 0, sizeof(rc_range_params_dword));
	for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
		rc_range_params_dword[i / 2] |=
			(u32)(((vdsc_cfg->rc_range_params[i].range_bpg_offset <<
				RC_BPG_OFFSET_SHIFT) |
			       (vdsc_cfg->rc_range_params[i].range_max_qp <<
				RC_MAX_QP_SHIFT) |
			       (vdsc_cfg->rc_range_params[i].range_min_qp <<
				RC_MIN_QP_SHIFT)) << 16 * (i % 2));
		drm_dbg_kms(&dev_priv->drm, "RC_RANGE_PARAM_%d = 0x%08x\n", i,
			    rc_range_params_dword[i / 2]);
	}
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_0,
			       rc_range_params_dword[0]);
		intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_0_UDW,
			       rc_range_params_dword[1]);
		intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_1,
			       rc_range_params_dword[2]);
		intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_1_UDW,
			       rc_range_params_dword[3]);
		intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_2,
			       rc_range_params_dword[4]);
		intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_2_UDW,
			       rc_range_params_dword[5]);
		intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_3,
			       rc_range_params_dword[6]);
		intel_de_write(dev_priv, DSCA_RC_RANGE_PARAMETERS_3_UDW,
			       rc_range_params_dword[7]);
		if (crtc_state->dsc.dsc_split) {
			intel_de_write(dev_priv, DSCC_RC_RANGE_PARAMETERS_0,
				       rc_range_params_dword[0]);
			intel_de_write(dev_priv,
				       DSCC_RC_RANGE_PARAMETERS_0_UDW,
				       rc_range_params_dword[1]);
			intel_de_write(dev_priv, DSCC_RC_RANGE_PARAMETERS_1,
				       rc_range_params_dword[2]);
			intel_de_write(dev_priv,
				       DSCC_RC_RANGE_PARAMETERS_1_UDW,
				       rc_range_params_dword[3]);
			intel_de_write(dev_priv, DSCC_RC_RANGE_PARAMETERS_2,
				       rc_range_params_dword[4]);
			intel_de_write(dev_priv,
				       DSCC_RC_RANGE_PARAMETERS_2_UDW,
				       rc_range_params_dword[5]);
			intel_de_write(dev_priv, DSCC_RC_RANGE_PARAMETERS_3,
				       rc_range_params_dword[6]);
			intel_de_write(dev_priv,
				       DSCC_RC_RANGE_PARAMETERS_3_UDW,
				       rc_range_params_dword[7]);
		}
	} else {
		intel_de_write(dev_priv, ICL_DSC0_RC_RANGE_PARAMETERS_0(pipe),
			       rc_range_params_dword[0]);
		intel_de_write(dev_priv,
			       ICL_DSC0_RC_RANGE_PARAMETERS_0_UDW(pipe),
			       rc_range_params_dword[1]);
		intel_de_write(dev_priv, ICL_DSC0_RC_RANGE_PARAMETERS_1(pipe),
			       rc_range_params_dword[2]);
		intel_de_write(dev_priv,
			       ICL_DSC0_RC_RANGE_PARAMETERS_1_UDW(pipe),
			       rc_range_params_dword[3]);
		intel_de_write(dev_priv, ICL_DSC0_RC_RANGE_PARAMETERS_2(pipe),
			       rc_range_params_dword[4]);
		intel_de_write(dev_priv,
			       ICL_DSC0_RC_RANGE_PARAMETERS_2_UDW(pipe),
			       rc_range_params_dword[5]);
		intel_de_write(dev_priv, ICL_DSC0_RC_RANGE_PARAMETERS_3(pipe),
			       rc_range_params_dword[6]);
		intel_de_write(dev_priv,
			       ICL_DSC0_RC_RANGE_PARAMETERS_3_UDW(pipe),
			       rc_range_params_dword[7]);
		if (crtc_state->dsc.dsc_split) {
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_RANGE_PARAMETERS_0(pipe),
				       rc_range_params_dword[0]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_RANGE_PARAMETERS_0_UDW(pipe),
				       rc_range_params_dword[1]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_RANGE_PARAMETERS_1(pipe),
				       rc_range_params_dword[2]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_RANGE_PARAMETERS_1_UDW(pipe),
				       rc_range_params_dword[3]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_RANGE_PARAMETERS_2(pipe),
				       rc_range_params_dword[4]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_RANGE_PARAMETERS_2_UDW(pipe),
				       rc_range_params_dword[5]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_RANGE_PARAMETERS_3(pipe),
				       rc_range_params_dword[6]);
			intel_de_write(dev_priv,
				       ICL_DSC1_RC_RANGE_PARAMETERS_3_UDW(pipe),
				       rc_range_params_dword[7]);
		}
	}
}

void intel_dsc_dsi_pps_write(struct intel_encoder *encoder,
			     const struct intel_crtc_state *crtc_state)
{
	const struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
	struct mipi_dsi_device *dsi;
	struct drm_dsc_picture_parameter_set pps;
	enum port port;

	if (!crtc_state->dsc.compression_enable)
		return;

	drm_dsc_pps_payload_pack(&pps, vdsc_cfg);

	for_each_dsi_port(port, intel_dsi->ports) {
		dsi = intel_dsi->dsi_hosts[port]->device;

		mipi_dsi_picture_parameter_set(dsi, &pps);
		mipi_dsi_compression_mode(dsi, true);
	}
}

void intel_dsc_dp_pps_write(struct intel_encoder *encoder,
			    const struct intel_crtc_state *crtc_state)
{
	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
	const struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
	struct drm_dsc_pps_infoframe dp_dsc_pps_sdp;

	if (!crtc_state->dsc.compression_enable)
		return;

	/* Prepare DP SDP PPS header as per DP 1.4 spec, Table 2-123 */
	drm_dsc_dp_pps_header_init(&dp_dsc_pps_sdp.pps_header);

	/* Fill the PPS payload bytes as per DSC spec 1.2 Table 4-1 */
	drm_dsc_pps_payload_pack(&dp_dsc_pps_sdp.pps_payload, vdsc_cfg);

	dig_port->write_infoframe(encoder, crtc_state,
				  DP_SDP_PPS, &dp_dsc_pps_sdp,
				  sizeof(dp_dsc_pps_sdp));
}

static i915_reg_t dss_ctl1_reg(struct intel_crtc *crtc, enum transcoder cpu_transcoder)
{
	return is_pipe_dsc(crtc, cpu_transcoder) ?
		ICL_PIPE_DSS_CTL1(crtc->pipe) : DSS_CTL1;
}

static i915_reg_t dss_ctl2_reg(struct intel_crtc *crtc, enum transcoder cpu_transcoder)
{
	return is_pipe_dsc(crtc, cpu_transcoder) ?
		ICL_PIPE_DSS_CTL2(crtc->pipe) : DSS_CTL2;
}

void intel_uncompressed_joiner_enable(const struct intel_crtc_state *crtc_state)
{
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
	u32 dss_ctl1_val = 0;

	if (crtc_state->bigjoiner_pipes && !crtc_state->dsc.compression_enable) {
		if (intel_crtc_is_bigjoiner_slave(crtc_state))
			dss_ctl1_val |= UNCOMPRESSED_JOINER_SLAVE;
		else
			dss_ctl1_val |= UNCOMPRESSED_JOINER_MASTER;

		intel_de_write(dev_priv, dss_ctl1_reg(crtc, crtc_state->cpu_transcoder), dss_ctl1_val);
	}
}

void intel_dsc_enable(const struct intel_crtc_state *crtc_state)
{
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
	u32 dss_ctl1_val = 0;
	u32 dss_ctl2_val = 0;

	if (!crtc_state->dsc.compression_enable)
		return;

	intel_dsc_pps_configure(crtc_state);

	dss_ctl2_val |= LEFT_BRANCH_VDSC_ENABLE;
	if (crtc_state->dsc.dsc_split) {
		dss_ctl2_val |= RIGHT_BRANCH_VDSC_ENABLE;
		dss_ctl1_val |= JOINER_ENABLE;
	}
	if (crtc_state->bigjoiner_pipes) {
		dss_ctl1_val |= BIG_JOINER_ENABLE;
		if (!intel_crtc_is_bigjoiner_slave(crtc_state))
			dss_ctl1_val |= MASTER_BIG_JOINER_ENABLE;
	}
	intel_de_write(dev_priv, dss_ctl1_reg(crtc, crtc_state->cpu_transcoder), dss_ctl1_val);
	intel_de_write(dev_priv, dss_ctl2_reg(crtc, crtc_state->cpu_transcoder), dss_ctl2_val);
}

void intel_dsc_disable(const struct intel_crtc_state *old_crtc_state)
{
	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);

	/* Disable only if either of them is enabled */
	if (old_crtc_state->dsc.compression_enable ||
	    old_crtc_state->bigjoiner_pipes) {
		intel_de_write(dev_priv, dss_ctl1_reg(crtc, old_crtc_state->cpu_transcoder), 0);
		intel_de_write(dev_priv, dss_ctl2_reg(crtc, old_crtc_state->cpu_transcoder), 0);
	}
}

void intel_dsc_get_config(struct intel_crtc_state *crtc_state)
{
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
	struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
	enum pipe pipe = crtc->pipe;
	enum intel_display_power_domain power_domain;
	intel_wakeref_t wakeref;
	u32 dss_ctl1, dss_ctl2, pps0 = 0, pps1 = 0;

	if (!intel_dsc_source_support(crtc_state))
		return;

	power_domain = intel_dsc_power_domain(crtc, cpu_transcoder);

	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
	if (!wakeref)
		return;

	dss_ctl1 = intel_de_read(dev_priv, dss_ctl1_reg(crtc, cpu_transcoder));
	dss_ctl2 = intel_de_read(dev_priv, dss_ctl2_reg(crtc, cpu_transcoder));

	crtc_state->dsc.compression_enable = dss_ctl2 & LEFT_BRANCH_VDSC_ENABLE;
	if (!crtc_state->dsc.compression_enable)
		goto out;

	crtc_state->dsc.dsc_split = (dss_ctl2 & RIGHT_BRANCH_VDSC_ENABLE) &&
		(dss_ctl1 & JOINER_ENABLE);

	/* FIXME: add more state readout as needed */

	/* PPS0 & PPS1 */
	if (!is_pipe_dsc(crtc, cpu_transcoder)) {
		pps1 = intel_de_read(dev_priv, DSCA_PICTURE_PARAMETER_SET_1);
	} else {
		pps0 = intel_de_read(dev_priv,
				     ICL_DSC0_PICTURE_PARAMETER_SET_0(pipe));
		pps1 = intel_de_read(dev_priv,
				     ICL_DSC0_PICTURE_PARAMETER_SET_1(pipe));
	}

	vdsc_cfg->bits_per_pixel = pps1;

	if (pps0 & DSC_NATIVE_420_ENABLE)
		vdsc_cfg->bits_per_pixel >>= 1;

	crtc_state->dsc.compressed_bpp = vdsc_cfg->bits_per_pixel >> 4;
out:
	intel_display_power_put(dev_priv, power_domain, wakeref);
}