drm/amd/display: Remove drm_dsc_dc.c

This file was accidentally added to the driver during
Navi promotion

Nothing includes it. No makefile attempts to compile it, and
it would fail compilation if they tried

Remove it

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>w
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 0 insertions, 453 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c b/drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c
deleted file mode 100644
index fd1fb1653479..000000000000
--- a/drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c
+++ /dev/null
@@ -1,453 +0,0 @@
-// SPDX-License-Identifier: MIT
-/*
- * Copyright © 2018 Intel Corp
- *
- * Author:
- * Manasi Navare <manasi.d.navare@intel.com>
- */
-
-/* DC versions of linux includes */
-#include <include/drm_dsc_dc.h>
-
-#define EXPORT_SYMBOL(symbol)	/* nothing */
-#define BUILD_BUG_ON(cond)	/* nothing */
-#define DIV_ROUND_UP(a, b)	(((b) + (a) - 1) / (b))
-#define ERANGE			-1
-#define DRM_DEBUG_KMS(msg)	/* nothing */
-#define cpu_to_be16(__x) little_to_big(__x)
-#define MAX(x, y)		((x) > (y) ? (x) : (y))
-
-static unsigned short little_to_big(int data)
-{
-	/* Swap lower and upper byte. DMCU uses big endian format. */
-	return (0xff & (data >> 8)) + ((data & 0xff) << 8);
-}
-
-/*
- * Everything below this comment was copied directly from drm_dsc.c.
- * Only the functions needed in DC are included.
- * Please keep this file synced with upstream.
- */
-
-/**
- * DOC: dsc helpers
- *
- * These functions contain some common logic and helpers to deal with VESA
- * Display Stream Compression standard required for DSC on Display Port/eDP or
- * MIPI display interfaces.
- */
-
-/**
- * drm_dsc_pps_payload_pack() - Populates the DSC PPS
- *
- * @pps_payload:
- * Bitwise struct for DSC Picture Parameter Set. This is defined
- * by &struct drm_dsc_picture_parameter_set
- * @dsc_cfg:
- * DSC Configuration data filled by driver as defined by
- * &struct drm_dsc_config
- *
- * DSC source device sends a picture parameter set (PPS) containing the
- * information required by the sink to decode the compressed frame. Driver
- * populates the DSC PPS struct using the DSC configuration parameters in
- * the order expected by the DSC Display Sink device. For the DSC, the sink
- * device expects the PPS payload in big endian format for fields
- * that span more than 1 byte.
- */
-void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_payload,
-				const struct drm_dsc_config *dsc_cfg)
-{
-	int i;
-
-	/* Protect against someone accidently changing struct size */
-	BUILD_BUG_ON(sizeof(*pps_payload) !=
-		     DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1 + 1);
-
-	memset(pps_payload, 0, sizeof(*pps_payload));
-
-	/* PPS 0 */
-	pps_payload->dsc_version =
-		dsc_cfg->dsc_version_minor |
-		dsc_cfg->dsc_version_major << DSC_PPS_VERSION_MAJOR_SHIFT;
-
-	/* PPS 1, 2 is 0 */
-
-	/* PPS 3 */
-	pps_payload->pps_3 =
-		dsc_cfg->line_buf_depth |
-		dsc_cfg->bits_per_component << DSC_PPS_BPC_SHIFT;
-
-	/* PPS 4 */
-	pps_payload->pps_4 =
-		((dsc_cfg->bits_per_pixel & DSC_PPS_BPP_HIGH_MASK) >>
-		 DSC_PPS_MSB_SHIFT) |
-		dsc_cfg->vbr_enable << DSC_PPS_VBR_EN_SHIFT |
-		dsc_cfg->simple_422 << DSC_PPS_SIMPLE422_SHIFT |
-		dsc_cfg->convert_rgb << DSC_PPS_CONVERT_RGB_SHIFT |
-		dsc_cfg->block_pred_enable << DSC_PPS_BLOCK_PRED_EN_SHIFT;
-
-	/* PPS 5 */
-	pps_payload->bits_per_pixel_low =
-		(dsc_cfg->bits_per_pixel & DSC_PPS_LSB_MASK);
-
-	/*
-	 * The DSC panel expects the PPS packet to have big endian format
-	 * for data spanning 2 bytes. Use a macro cpu_to_be16() to convert
-	 * to big endian format. If format is little endian, it will swap
-	 * bytes to convert to Big endian else keep it unchanged.
-	 */
-
-	/* PPS 6, 7 */
-	pps_payload->pic_height = cpu_to_be16(dsc_cfg->pic_height);
-
-	/* PPS 8, 9 */
-	pps_payload->pic_width = cpu_to_be16(dsc_cfg->pic_width);
-
-	/* PPS 10, 11 */
-	pps_payload->slice_height = cpu_to_be16(dsc_cfg->slice_height);
-
-	/* PPS 12, 13 */
-	pps_payload->slice_width = cpu_to_be16(dsc_cfg->slice_width);
-
-	/* PPS 14, 15 */
-	pps_payload->chunk_size = cpu_to_be16(dsc_cfg->slice_chunk_size);
-
-	/* PPS 16 */
-	pps_payload->initial_xmit_delay_high =
-		((dsc_cfg->initial_xmit_delay &
-		  DSC_PPS_INIT_XMIT_DELAY_HIGH_MASK) >>
-		 DSC_PPS_MSB_SHIFT);
-
-	/* PPS 17 */
-	pps_payload->initial_xmit_delay_low =
-		(dsc_cfg->initial_xmit_delay & DSC_PPS_LSB_MASK);
-
-	/* PPS 18, 19 */
-	pps_payload->initial_dec_delay =
-		cpu_to_be16(dsc_cfg->initial_dec_delay);
-
-	/* PPS 20 is 0 */
-
-	/* PPS 21 */
-	pps_payload->initial_scale_value =
-		dsc_cfg->initial_scale_value;
-
-	/* PPS 22, 23 */
-	pps_payload->scale_increment_interval =
-		cpu_to_be16(dsc_cfg->scale_increment_interval);
-
-	/* PPS 24 */
-	pps_payload->scale_decrement_interval_high =
-		((dsc_cfg->scale_decrement_interval &
-		  DSC_PPS_SCALE_DEC_INT_HIGH_MASK) >>
-		 DSC_PPS_MSB_SHIFT);
-
-	/* PPS 25 */
-	pps_payload->scale_decrement_interval_low =
-		(dsc_cfg->scale_decrement_interval & DSC_PPS_LSB_MASK);
-
-	/* PPS 26[7:0], PPS 27[7:5] RESERVED */
-
-	/* PPS 27 */
-	pps_payload->first_line_bpg_offset =
-		dsc_cfg->first_line_bpg_offset;
-
-	/* PPS 28, 29 */
-	pps_payload->nfl_bpg_offset =
-		cpu_to_be16(dsc_cfg->nfl_bpg_offset);
-
-	/* PPS 30, 31 */
-	pps_payload->slice_bpg_offset =
-		cpu_to_be16(dsc_cfg->slice_bpg_offset);
-
-	/* PPS 32, 33 */
-	pps_payload->initial_offset =
-		cpu_to_be16(dsc_cfg->initial_offset);
-
-	/* PPS 34, 35 */
-	pps_payload->final_offset = cpu_to_be16(dsc_cfg->final_offset);
-
-	/* PPS 36 */
-	pps_payload->flatness_min_qp = dsc_cfg->flatness_min_qp;
-
-	/* PPS 37 */
-	pps_payload->flatness_max_qp = dsc_cfg->flatness_max_qp;
-
-	/* PPS 38, 39 */
-	pps_payload->rc_model_size =
-		cpu_to_be16(DSC_RC_MODEL_SIZE_CONST);
-
-	/* PPS 40 */
-	pps_payload->rc_edge_factor = DSC_RC_EDGE_FACTOR_CONST;
-
-	/* PPS 41 */
-	pps_payload->rc_quant_incr_limit0 =
-		dsc_cfg->rc_quant_incr_limit0;
-
-	/* PPS 42 */
-	pps_payload->rc_quant_incr_limit1 =
-		dsc_cfg->rc_quant_incr_limit1;
-
-	/* PPS 43 */
-	pps_payload->rc_tgt_offset = DSC_RC_TGT_OFFSET_LO_CONST |
-		DSC_RC_TGT_OFFSET_HI_CONST << DSC_PPS_RC_TGT_OFFSET_HI_SHIFT;
-
-	/* PPS 44 - 57 */
-	for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++)
-		pps_payload->rc_buf_thresh[i] =
-			dsc_cfg->rc_buf_thresh[i];
-
-	/* PPS 58 - 87 */
-	/*
-	 * For DSC sink programming the RC Range parameter fields
-	 * are as follows: Min_qp[15:11], max_qp[10:6], offset[5:0]
-	 */
-	for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
-		pps_payload->rc_range_parameters[i] =
-			((dsc_cfg->rc_range_params[i].range_min_qp <<
-			  DSC_PPS_RC_RANGE_MINQP_SHIFT) |
-			 (dsc_cfg->rc_range_params[i].range_max_qp <<
-			  DSC_PPS_RC_RANGE_MAXQP_SHIFT) |
-			 (dsc_cfg->rc_range_params[i].range_bpg_offset));
-		pps_payload->rc_range_parameters[i] =
-			cpu_to_be16(pps_payload->rc_range_parameters[i]);
-	}
-
-	/* PPS 88 */
-	pps_payload->native_422_420 = dsc_cfg->native_422 |
-		dsc_cfg->native_420 << DSC_PPS_NATIVE_420_SHIFT;
-
-	/* PPS 89 */
-	pps_payload->second_line_bpg_offset =
-		dsc_cfg->second_line_bpg_offset;
-
-	/* PPS 90, 91 */
-	pps_payload->nsl_bpg_offset =
-		cpu_to_be16(dsc_cfg->nsl_bpg_offset);
-
-	/* PPS 92, 93 */
-	pps_payload->second_line_offset_adj =
-		cpu_to_be16(dsc_cfg->second_line_offset_adj);
-
-	/* PPS 94 - 127 are O */
-}
-EXPORT_SYMBOL(drm_dsc_pps_payload_pack);
-
-static int compute_offset(struct drm_dsc_config *vdsc_cfg, int pixels_per_group,
-				int groups_per_line, int grpcnt)
-{
-	int offset = 0;
-	int grpcnt_id = DIV_ROUND_UP(vdsc_cfg->initial_xmit_delay, pixels_per_group);
-
-	if (grpcnt <= grpcnt_id)
-		offset = DIV_ROUND_UP(grpcnt * pixels_per_group * vdsc_cfg->bits_per_pixel, 16);
-	else
-		offset = DIV_ROUND_UP(grpcnt_id * pixels_per_group * vdsc_cfg->bits_per_pixel, 16)
-			- (((grpcnt - grpcnt_id) * vdsc_cfg->slice_bpg_offset) >> 11);
-
-	if (grpcnt <= groups_per_line)
-		offset += grpcnt * vdsc_cfg->first_line_bpg_offset;
-	else
-		offset += groups_per_line * vdsc_cfg->first_line_bpg_offset
-			- (((grpcnt - groups_per_line) * vdsc_cfg->nfl_bpg_offset) >> 11);
-
-	if (vdsc_cfg->native_420) {
-		if (grpcnt <= groups_per_line)
-			offset -= (grpcnt * vdsc_cfg->nsl_bpg_offset) >> 11;
-		else if (grpcnt <= 2 * groups_per_line)
-			offset += (grpcnt - groups_per_line) * vdsc_cfg->second_line_bpg_offset
-				- ((groups_per_line * vdsc_cfg->nsl_bpg_offset) >> 11);
-		else
-			offset += (grpcnt - groups_per_line) * vdsc_cfg->second_line_bpg_offset
-				- (((grpcnt - groups_per_line) * vdsc_cfg->nsl_bpg_offset) >> 11);
-	}
-
-	return offset;
-}
-
-/**
- * drm_dsc_compute_rc_parameters() - Write rate control
- * parameters to the dsc configuration defined in
- * &struct drm_dsc_config in accordance with the DSC 1.2
- * specification. Some configuration fields must be present
- * beforehand.
- *
- * @vdsc_cfg:
- * DSC Configuration data partially filled by driver
- */
-int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg)
-{
-	unsigned long groups_per_line = 0;
-	unsigned long groups_total = 0;
-	unsigned long num_extra_mux_bits = 0;
-	unsigned long slice_bits = 0;
-	unsigned long hrd_delay = 0;
-	unsigned long final_scale = 0;
-	unsigned long rbs_min = 0;
-	unsigned long max_offset = 0;
-
-	if (vdsc_cfg->native_420 || vdsc_cfg->native_422) {
-		/* Number of groups used to code each line of a slice */
-		groups_per_line = DIV_ROUND_UP(vdsc_cfg->slice_width / 2,
-					       DSC_RC_PIXELS_PER_GROUP);
-
-		/* chunksize in Bytes */
-		vdsc_cfg->slice_chunk_size = DIV_ROUND_UP(vdsc_cfg->slice_width / 2 *
-							  vdsc_cfg->bits_per_pixel,
-							  (8 * 16));
-	} else {
-		/* Number of groups used to code each line of a slice */
-		groups_per_line = DIV_ROUND_UP(vdsc_cfg->slice_width,
-					       DSC_RC_PIXELS_PER_GROUP);
-
-		/* chunksize in Bytes */
-		vdsc_cfg->slice_chunk_size = DIV_ROUND_UP(vdsc_cfg->slice_width *
-							  vdsc_cfg->bits_per_pixel,
-							  (8 * 16));
-	}
-
-	if (vdsc_cfg->convert_rgb)
-		num_extra_mux_bits = 3 * (vdsc_cfg->mux_word_size +
-					  (4 * vdsc_cfg->bits_per_component + 4)
-					  - 2);
-	else if (vdsc_cfg->native_422)
-		num_extra_mux_bits = 4 * vdsc_cfg->mux_word_size +
-			(4 * vdsc_cfg->bits_per_component + 4) +
-			3 * (4 * vdsc_cfg->bits_per_component) - 2;
-	else
-		num_extra_mux_bits = 3 * vdsc_cfg->mux_word_size +
-			(4 * vdsc_cfg->bits_per_component + 4) +
-			2 * (4 * vdsc_cfg->bits_per_component) - 2;
-	/* Number of bits in one Slice */
-	slice_bits = 8 * vdsc_cfg->slice_chunk_size * vdsc_cfg->slice_height;
-
-	while ((num_extra_mux_bits > 0) &&
-	       ((slice_bits - num_extra_mux_bits) % vdsc_cfg->mux_word_size))
-		num_extra_mux_bits--;
-
-	if (groups_per_line < vdsc_cfg->initial_scale_value - 8)
-		vdsc_cfg->initial_scale_value = groups_per_line + 8;
-
-	/* scale_decrement_interval calculation according to DSC spec 1.11 */
-	if (vdsc_cfg->initial_scale_value > 8)
-		vdsc_cfg->scale_decrement_interval = groups_per_line /
-			(vdsc_cfg->initial_scale_value - 8);
-	else
-		vdsc_cfg->scale_decrement_interval = DSC_SCALE_DECREMENT_INTERVAL_MAX;
-
-	vdsc_cfg->final_offset = vdsc_cfg->rc_model_size -
-		(vdsc_cfg->initial_xmit_delay *
-		 vdsc_cfg->bits_per_pixel + 8) / 16 + num_extra_mux_bits;
-
-	if (vdsc_cfg->final_offset >= vdsc_cfg->rc_model_size) {
-		DRM_DEBUG_KMS("FinalOfs < RcModelSze for this InitialXmitDelay\n");
-		return -ERANGE;
-	}
-
-	final_scale = (vdsc_cfg->rc_model_size * 8) /
-		(vdsc_cfg->rc_model_size - vdsc_cfg->final_offset);
-	if (vdsc_cfg->slice_height > 1)
-		/*
-		 * NflBpgOffset is 16 bit value with 11 fractional bits
-		 * hence we multiply by 2^11 for preserving the
-		 * fractional part
-		 */
-		vdsc_cfg->nfl_bpg_offset = DIV_ROUND_UP((vdsc_cfg->first_line_bpg_offset << 11),
-							(vdsc_cfg->slice_height - 1));
-	else
-		vdsc_cfg->nfl_bpg_offset = 0;
-
-	/* 2^16 - 1 */
-	if (vdsc_cfg->nfl_bpg_offset > 65535) {
-		DRM_DEBUG_KMS("NflBpgOffset is too large for this slice height\n");
-		return -ERANGE;
-	}
-
-	if (vdsc_cfg->slice_height > 2)
-		vdsc_cfg->nsl_bpg_offset = DIV_ROUND_UP((vdsc_cfg->second_line_bpg_offset << 11),
-							(vdsc_cfg->slice_height - 1));
-	else
-		vdsc_cfg->nsl_bpg_offset = 0;
-
-	if (vdsc_cfg->nsl_bpg_offset > 65535) {
-		DRM_DEBUG_KMS("NslBpgOffset is too large for this slice height\n");
-		return -ERANGE;
-	}
-
-	/* Number of groups used to code the entire slice */
-	groups_total = groups_per_line * vdsc_cfg->slice_height;
-
-	/* slice_bpg_offset is 16 bit value with 11 fractional bits */
-	vdsc_cfg->slice_bpg_offset = DIV_ROUND_UP(((vdsc_cfg->rc_model_size -
-						    vdsc_cfg->initial_offset +
-						    num_extra_mux_bits) << 11),
-						  groups_total);
-
-	if (final_scale > 9) {
-		/*
-		 * ScaleIncrementInterval =
-		 * finaloffset/((NflBpgOffset + SliceBpgOffset)*8(finalscale - 1.125))
-		 * as (NflBpgOffset + SliceBpgOffset) has 11 bit fractional value,
-		 * we need divide by 2^11 from pstDscCfg values
-		 */
-		vdsc_cfg->scale_increment_interval =
-				(vdsc_cfg->final_offset * (1 << 11)) /
-				((vdsc_cfg->nfl_bpg_offset +
-				vdsc_cfg->nsl_bpg_offset +
-				vdsc_cfg->slice_bpg_offset) *
-				(final_scale - 9));
-	} else {
-		/*
-		 * If finalScaleValue is less than or equal to 9, a value of 0 should
-		 * be used to disable the scale increment at the end of the slice
-		 */
-		vdsc_cfg->scale_increment_interval = 0;
-	}
-
-	if (vdsc_cfg->scale_increment_interval > 65535) {
-		DRM_DEBUG_KMS("ScaleIncrementInterval is large for slice height\n");
-		return -ERANGE;
-	}
-
-	/*
-	 * DSC spec mentions that bits_per_pixel specifies the target
-	 * bits/pixel (bpp) rate that is used by the encoder,
-	 * in steps of 1/16 of a bit per pixel
-	 */
-	if (vdsc_cfg->dsc_version_minor == 2 && (vdsc_cfg->native_420 || vdsc_cfg->native_422)) {
-
-		max_offset = compute_offset(vdsc_cfg, DSC_RC_PIXELS_PER_GROUP, groups_per_line,
-					DIV_ROUND_UP(vdsc_cfg->initial_xmit_delay,
-						DSC_RC_PIXELS_PER_GROUP));
-
-		max_offset = MAX(max_offset,
-				compute_offset(vdsc_cfg, DSC_RC_PIXELS_PER_GROUP, groups_per_line,
-					DIV_ROUND_UP(vdsc_cfg->initial_xmit_delay,
-						groups_per_line)));
-
-		max_offset = MAX(max_offset,
-				compute_offset(vdsc_cfg, DSC_RC_PIXELS_PER_GROUP, groups_per_line,
-					DIV_ROUND_UP(vdsc_cfg->initial_xmit_delay,
-						groups_per_line * 2)));
-
-		rbs_min = vdsc_cfg->rc_model_size - vdsc_cfg->initial_offset + max_offset;
-	} else {
-		rbs_min = vdsc_cfg->rc_model_size - vdsc_cfg->initial_offset +
-			DIV_ROUND_UP(vdsc_cfg->initial_xmit_delay *
-				     vdsc_cfg->bits_per_pixel, 16) +
-			groups_per_line * vdsc_cfg->first_line_bpg_offset;
-	}
-
-	hrd_delay = DIV_ROUND_UP((rbs_min * 16), vdsc_cfg->bits_per_pixel);
-	vdsc_cfg->rc_bits = (hrd_delay * vdsc_cfg->bits_per_pixel) / 16;
-	vdsc_cfg->initial_dec_delay = hrd_delay - vdsc_cfg->initial_xmit_delay;
-
-	/* As per DSC spec v1.2a recommendation: */
-	if (vdsc_cfg->native_420)
-		vdsc_cfg->second_line_offset_adj = 512;
-	else
-		vdsc_cfg->second_line_offset_adj = 0;
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_dsc_compute_rc_parameters);