diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c | 453 |
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); |