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611 lines
16 KiB
611 lines
16 KiB
/* SPDX-License-Identifier: MIT |
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* Copyright (C) 2018 Intel Corp. |
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* |
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* Authors: |
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* Manasi Navare <[email protected]> |
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*/ |
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#ifndef DRM_DSC_H_ |
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#define DRM_DSC_H_ |
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#include <drm/drm_dp_helper.h> |
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/* VESA Display Stream Compression DSC 1.2 constants */ |
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#define DSC_NUM_BUF_RANGES 15 |
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#define DSC_MUX_WORD_SIZE_8_10_BPC 48 |
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#define DSC_MUX_WORD_SIZE_12_BPC 64 |
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#define DSC_RC_PIXELS_PER_GROUP 3 |
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#define DSC_SCALE_DECREMENT_INTERVAL_MAX 4095 |
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#define DSC_RANGE_BPG_OFFSET_MASK 0x3f |
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/* DSC Rate Control Constants */ |
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#define DSC_RC_MODEL_SIZE_CONST 8192 |
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#define DSC_RC_EDGE_FACTOR_CONST 6 |
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#define DSC_RC_TGT_OFFSET_HI_CONST 3 |
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#define DSC_RC_TGT_OFFSET_LO_CONST 3 |
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/* DSC PPS constants and macros */ |
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#define DSC_PPS_VERSION_MAJOR_SHIFT 4 |
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#define DSC_PPS_BPC_SHIFT 4 |
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#define DSC_PPS_MSB_SHIFT 8 |
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#define DSC_PPS_LSB_MASK (0xFF << 0) |
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#define DSC_PPS_BPP_HIGH_MASK (0x3 << 8) |
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#define DSC_PPS_VBR_EN_SHIFT 2 |
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#define DSC_PPS_SIMPLE422_SHIFT 3 |
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#define DSC_PPS_CONVERT_RGB_SHIFT 4 |
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#define DSC_PPS_BLOCK_PRED_EN_SHIFT 5 |
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#define DSC_PPS_INIT_XMIT_DELAY_HIGH_MASK (0x3 << 8) |
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#define DSC_PPS_SCALE_DEC_INT_HIGH_MASK (0xF << 8) |
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#define DSC_PPS_RC_TGT_OFFSET_HI_SHIFT 4 |
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#define DSC_PPS_RC_RANGE_MINQP_SHIFT 11 |
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#define DSC_PPS_RC_RANGE_MAXQP_SHIFT 6 |
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#define DSC_PPS_NATIVE_420_SHIFT 1 |
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#define DSC_1_2_MAX_LINEBUF_DEPTH_BITS 16 |
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#define DSC_1_2_MAX_LINEBUF_DEPTH_VAL 0 |
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#define DSC_1_1_MAX_LINEBUF_DEPTH_BITS 13 |
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/** |
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* struct drm_dsc_rc_range_parameters - DSC Rate Control range parameters |
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* |
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* This defines different rate control parameters used by the DSC engine |
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* to compress the frame. |
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*/ |
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struct drm_dsc_rc_range_parameters { |
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/** |
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* @range_min_qp: Min Quantization Parameters allowed for this range |
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*/ |
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u8 range_min_qp; |
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/** |
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* @range_max_qp: Max Quantization Parameters allowed for this range |
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*/ |
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u8 range_max_qp; |
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/** |
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* @range_bpg_offset: |
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* Bits/group offset to apply to target for this group |
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*/ |
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u8 range_bpg_offset; |
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}; |
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/** |
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* struct drm_dsc_config - Parameters required to configure DSC |
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* |
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* Driver populates this structure with all the parameters required |
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* to configure the display stream compression on the source. |
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*/ |
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struct drm_dsc_config { |
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/** |
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* @line_buf_depth: |
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* Bits per component for previous reconstructed line buffer |
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*/ |
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u8 line_buf_depth; |
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/** |
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* @bits_per_component: Bits per component to code (8/10/12) |
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*/ |
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u8 bits_per_component; |
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/** |
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* @convert_rgb: |
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* Flag to indicate if RGB - YCoCg conversion is needed |
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* True if RGB input, False if YCoCg input |
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*/ |
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bool convert_rgb; |
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/** |
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* @slice_count: Number fo slices per line used by the DSC encoder |
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*/ |
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u8 slice_count; |
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/** |
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* @slice_width: Width of each slice in pixels |
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*/ |
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u16 slice_width; |
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/** |
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* @slice_height: Slice height in pixels |
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*/ |
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u16 slice_height; |
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/** |
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* @simple_422: True if simple 4_2_2 mode is enabled else False |
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*/ |
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bool simple_422; |
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/** |
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* @pic_width: Width of the input display frame in pixels |
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*/ |
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u16 pic_width; |
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/** |
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* @pic_height: Vertical height of the input display frame |
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*/ |
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u16 pic_height; |
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/** |
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* @rc_tgt_offset_high: |
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* Offset to bits/group used by RC to determine QP adjustment |
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*/ |
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u8 rc_tgt_offset_high; |
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/** |
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* @rc_tgt_offset_low: |
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* Offset to bits/group used by RC to determine QP adjustment |
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*/ |
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u8 rc_tgt_offset_low; |
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/** |
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* @bits_per_pixel: |
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* Target bits per pixel with 4 fractional bits, bits_per_pixel << 4 |
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*/ |
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u16 bits_per_pixel; |
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/** |
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* @rc_edge_factor: |
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* Factor to determine if an edge is present based on the bits produced |
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*/ |
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u8 rc_edge_factor; |
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/** |
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* @rc_quant_incr_limit1: |
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* Slow down incrementing once the range reaches this value |
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*/ |
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u8 rc_quant_incr_limit1; |
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/** |
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* @rc_quant_incr_limit0: |
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* Slow down incrementing once the range reaches this value |
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*/ |
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u8 rc_quant_incr_limit0; |
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/** |
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* @initial_xmit_delay: |
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* Number of pixels to delay the initial transmission |
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*/ |
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u16 initial_xmit_delay; |
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/** |
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* @initial_dec_delay: |
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* Initial decoder delay, number of pixel times that the decoder |
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* accumulates data in its rate buffer before starting to decode |
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* and output pixels. |
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*/ |
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u16 initial_dec_delay; |
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/** |
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* @block_pred_enable: |
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* True if block prediction is used to code any groups within the |
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* picture. False if BP not used |
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*/ |
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bool block_pred_enable; |
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/** |
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* @first_line_bpg_offset: |
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* Number of additional bits allocated for each group on the first |
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* line of slice. |
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*/ |
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u8 first_line_bpg_offset; |
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/** |
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* @initial_offset: Value to use for RC model offset at slice start |
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*/ |
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u16 initial_offset; |
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/** |
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* @rc_buf_thresh: Thresholds defining each of the buffer ranges |
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*/ |
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u16 rc_buf_thresh[DSC_NUM_BUF_RANGES - 1]; |
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/** |
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* @rc_range_params: |
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* Parameters for each of the RC ranges defined in |
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* &struct drm_dsc_rc_range_parameters |
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*/ |
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struct drm_dsc_rc_range_parameters rc_range_params[DSC_NUM_BUF_RANGES]; |
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/** |
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* @rc_model_size: Total size of RC model |
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*/ |
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u16 rc_model_size; |
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/** |
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* @flatness_min_qp: Minimum QP where flatness information is sent |
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*/ |
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u8 flatness_min_qp; |
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/** |
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* @flatness_max_qp: Maximum QP where flatness information is sent |
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*/ |
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u8 flatness_max_qp; |
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/** |
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* @initial_scale_value: Initial value for the scale factor |
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*/ |
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u8 initial_scale_value; |
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/** |
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* @scale_decrement_interval: |
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* Specifies number of group times between decrementing the scale factor |
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* at beginning of a slice. |
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*/ |
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u16 scale_decrement_interval; |
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/** |
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* @scale_increment_interval: |
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* Number of group times between incrementing the scale factor value |
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* used at the beginning of a slice. |
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*/ |
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u16 scale_increment_interval; |
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/** |
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* @nfl_bpg_offset: Non first line BPG offset to be used |
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*/ |
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u16 nfl_bpg_offset; |
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/** |
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* @slice_bpg_offset: BPG offset used to enforce slice bit |
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*/ |
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u16 slice_bpg_offset; |
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/** |
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* @final_offset: Final RC linear transformation offset value |
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*/ |
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u16 final_offset; |
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/** |
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* @vbr_enable: True if VBR mode is enabled, false if disabled |
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*/ |
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bool vbr_enable; |
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/** |
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* @mux_word_size: Mux word size (in bits) for SSM mode |
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*/ |
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u8 mux_word_size; |
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/** |
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* @slice_chunk_size: |
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* The (max) size in bytes of the "chunks" that are used in slice |
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* multiplexing. |
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*/ |
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u16 slice_chunk_size; |
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/** |
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* @rc_bits: Rate control buffer size in bits |
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*/ |
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u16 rc_bits; |
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/** |
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* @dsc_version_minor: DSC minor version |
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*/ |
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u8 dsc_version_minor; |
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/** |
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* @dsc_version_major: DSC major version |
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*/ |
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u8 dsc_version_major; |
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/** |
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* @native_422: True if Native 4:2:2 supported, else false |
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*/ |
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bool native_422; |
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/** |
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* @native_420: True if Native 4:2:0 supported else false. |
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*/ |
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bool native_420; |
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/** |
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* @second_line_bpg_offset: |
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* Additional bits/grp for seconnd line of slice for native 4:2:0 |
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*/ |
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u8 second_line_bpg_offset; |
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/** |
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* @nsl_bpg_offset: |
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* Num of bits deallocated for each grp that is not in second line of |
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* slice |
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*/ |
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u16 nsl_bpg_offset; |
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/** |
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* @second_line_offset_adj: |
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* Offset adjustment for second line in Native 4:2:0 mode |
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*/ |
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u16 second_line_offset_adj; |
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}; |
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/** |
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* struct drm_dsc_picture_parameter_set - Represents 128 bytes of |
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* Picture Parameter Set |
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* |
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* The VESA DSC standard defines picture parameter set (PPS) which display |
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* stream compression encoders must communicate to decoders. |
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* The PPS is encapsulated in 128 bytes (PPS 0 through PPS 127). The fields in |
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* this structure are as per Table 4.1 in Vesa DSC specification v1.1/v1.2. |
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* The PPS fields that span over more than a byte should be stored in Big Endian |
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* format. |
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*/ |
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struct drm_dsc_picture_parameter_set { |
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/** |
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* @dsc_version: |
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* PPS0[3:0] - dsc_version_minor: Contains Minor version of DSC |
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* PPS0[7:4] - dsc_version_major: Contains major version of DSC |
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*/ |
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u8 dsc_version; |
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/** |
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* @pps_identifier: |
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* PPS1[7:0] - Application specific identifier that can be |
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* used to differentiate between different PPS tables. |
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*/ |
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u8 pps_identifier; |
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/** |
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* @pps_reserved: |
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* PPS2[7:0]- RESERVED Byte |
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*/ |
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u8 pps_reserved; |
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/** |
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* @pps_3: |
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* PPS3[3:0] - linebuf_depth: Contains linebuffer bit depth used to |
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* generate the bitstream. (0x0 - 16 bits for DSC 1.2, 0x8 - 8 bits, |
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* 0xA - 10 bits, 0xB - 11 bits, 0xC - 12 bits, 0xD - 13 bits, |
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* 0xE - 14 bits for DSC1.2, 0xF - 14 bits for DSC 1.2. |
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* PPS3[7:4] - bits_per_component: Bits per component for the original |
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* pixels of the encoded picture. |
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* 0x0 = 16bpc (allowed only when dsc_version_minor = 0x2) |
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* 0x8 = 8bpc, 0xA = 10bpc, 0xC = 12bpc, 0xE = 14bpc (also |
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* allowed only when dsc_minor_version = 0x2) |
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*/ |
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u8 pps_3; |
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/** |
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* @pps_4: |
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* PPS4[1:0] -These are the most significant 2 bits of |
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* compressed BPP bits_per_pixel[9:0] syntax element. |
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* PPS4[2] - vbr_enable: 0 = VBR disabled, 1 = VBR enabled |
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* PPS4[3] - simple_422: Indicates if decoder drops samples to |
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* reconstruct the 4:2:2 picture. |
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* PPS4[4] - Convert_rgb: Indicates if DSC color space conversion is |
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* active. |
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* PPS4[5] - blobk_pred_enable: Indicates if BP is used to code any |
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* groups in picture |
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* PPS4[7:6] - Reseved bits |
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*/ |
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u8 pps_4; |
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/** |
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* @bits_per_pixel_low: |
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* PPS5[7:0] - This indicates the lower significant 8 bits of |
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* the compressed BPP bits_per_pixel[9:0] element. |
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*/ |
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u8 bits_per_pixel_low; |
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/** |
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* @pic_height: |
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* PPS6[7:0], PPS7[7:0] -pic_height: Specifies the number of pixel rows |
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* within the raster. |
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*/ |
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__be16 pic_height; |
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/** |
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* @pic_width: |
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* PPS8[7:0], PPS9[7:0] - pic_width: Number of pixel columns within |
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* the raster. |
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*/ |
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__be16 pic_width; |
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/** |
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* @slice_height: |
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* PPS10[7:0], PPS11[7:0] - Slice height in units of pixels. |
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*/ |
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__be16 slice_height; |
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/** |
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* @slice_width: |
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* PPS12[7:0], PPS13[7:0] - Slice width in terms of pixels. |
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*/ |
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__be16 slice_width; |
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/** |
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* @chunk_size: |
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* PPS14[7:0], PPS15[7:0] - Size in units of bytes of the chunks |
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* that are used for slice multiplexing. |
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*/ |
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__be16 chunk_size; |
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/** |
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* @initial_xmit_delay_high: |
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* PPS16[1:0] - Most Significant two bits of initial transmission delay. |
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* It specifies the number of pixel times that the encoder waits before |
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* transmitting data from its rate buffer. |
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* PPS16[7:2] - Reserved |
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*/ |
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u8 initial_xmit_delay_high; |
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/** |
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* @initial_xmit_delay_low: |
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* PPS17[7:0] - Least significant 8 bits of initial transmission delay. |
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*/ |
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u8 initial_xmit_delay_low; |
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/** |
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* @initial_dec_delay: |
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* |
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* PPS18[7:0], PPS19[7:0] - Initial decoding delay which is the number |
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* of pixel times that the decoder accumulates data in its rate buffer |
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* before starting to decode and output pixels. |
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*/ |
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__be16 initial_dec_delay; |
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/** |
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* @pps20_reserved: |
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* |
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* PPS20[7:0] - Reserved |
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*/ |
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u8 pps20_reserved; |
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/** |
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* @initial_scale_value: |
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* PPS21[5:0] - Initial rcXformScale factor used at beginning |
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* of a slice. |
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* PPS21[7:6] - Reserved |
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*/ |
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u8 initial_scale_value; |
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/** |
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* @scale_increment_interval: |
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* PPS22[7:0], PPS23[7:0] - Number of group times between incrementing |
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* the rcXformScale factor at end of a slice. |
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*/ |
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__be16 scale_increment_interval; |
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/** |
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* @scale_decrement_interval_high: |
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* PPS24[3:0] - Higher 4 bits indicating number of group times between |
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* decrementing the rcXformScale factor at beginning of a slice. |
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* PPS24[7:4] - Reserved |
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*/ |
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u8 scale_decrement_interval_high; |
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/** |
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* @scale_decrement_interval_low: |
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* PPS25[7:0] - Lower 8 bits of scale decrement interval |
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*/ |
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u8 scale_decrement_interval_low; |
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/** |
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* @pps26_reserved: |
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* PPS26[7:0] |
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*/ |
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u8 pps26_reserved; |
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/** |
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* @first_line_bpg_offset: |
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* PPS27[4:0] - Number of additional bits that are allocated |
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* for each group on first line of a slice. |
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* PPS27[7:5] - Reserved |
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*/ |
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u8 first_line_bpg_offset; |
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/** |
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* @nfl_bpg_offset: |
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* PPS28[7:0], PPS29[7:0] - Number of bits including frac bits |
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* deallocated for each group for groups after the first line of slice. |
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*/ |
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__be16 nfl_bpg_offset; |
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/** |
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* @slice_bpg_offset: |
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* PPS30, PPS31[7:0] - Number of bits that are deallocated for each |
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* group to enforce the slice constraint. |
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*/ |
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__be16 slice_bpg_offset; |
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/** |
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* @initial_offset: |
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* PPS32,33[7:0] - Initial value for rcXformOffset |
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*/ |
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__be16 initial_offset; |
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/** |
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* @final_offset: |
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* PPS34,35[7:0] - Maximum end-of-slice value for rcXformOffset |
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*/ |
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__be16 final_offset; |
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/** |
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* @flatness_min_qp: |
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* PPS36[4:0] - Minimum QP at which flatness is signaled and |
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* flatness QP adjustment is made. |
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* PPS36[7:5] - Reserved |
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*/ |
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u8 flatness_min_qp; |
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/** |
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* @flatness_max_qp: |
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* PPS37[4:0] - Max QP at which flatness is signalled and |
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* the flatness adjustment is made. |
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* PPS37[7:5] - Reserved |
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*/ |
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u8 flatness_max_qp; |
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/** |
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* @rc_model_size: |
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* PPS38,39[7:0] - Number of bits within RC Model. |
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*/ |
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__be16 rc_model_size; |
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/** |
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* @rc_edge_factor: |
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* PPS40[3:0] - Ratio of current activity vs, previous |
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* activity to determine presence of edge. |
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* PPS40[7:4] - Reserved |
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*/ |
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u8 rc_edge_factor; |
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/** |
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* @rc_quant_incr_limit0: |
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* PPS41[4:0] - QP threshold used in short term RC |
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* PPS41[7:5] - Reserved |
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*/ |
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u8 rc_quant_incr_limit0; |
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/** |
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* @rc_quant_incr_limit1: |
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* PPS42[4:0] - QP threshold used in short term RC |
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* PPS42[7:5] - Reserved |
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*/ |
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u8 rc_quant_incr_limit1; |
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/** |
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* @rc_tgt_offset: |
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* PPS43[3:0] - Lower end of the variability range around the target |
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* bits per group that is allowed by short term RC. |
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* PPS43[7:4]- Upper end of the variability range around the target |
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* bits per group that i allowed by short term rc. |
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*/ |
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u8 rc_tgt_offset; |
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/** |
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* @rc_buf_thresh: |
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* PPS44[7:0] - PPS57[7:0] - Specifies the thresholds in RC model for |
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* the 15 ranges defined by 14 thresholds. |
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*/ |
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u8 rc_buf_thresh[DSC_NUM_BUF_RANGES - 1]; |
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/** |
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* @rc_range_parameters: |
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* PPS58[7:0] - PPS87[7:0] |
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* Parameters that correspond to each of the 15 ranges. |
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*/ |
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__be16 rc_range_parameters[DSC_NUM_BUF_RANGES]; |
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/** |
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* @native_422_420: |
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* PPS88[0] - 0 = Native 4:2:2 not used |
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* 1 = Native 4:2:2 used |
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* PPS88[1] - 0 = Native 4:2:0 not use |
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* 1 = Native 4:2:0 used |
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* PPS88[7:2] - Reserved 6 bits |
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*/ |
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u8 native_422_420; |
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/** |
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* @second_line_bpg_offset: |
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* PPS89[4:0] - Additional bits/group budget for the |
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* second line of a slice in Native 4:2:0 mode. |
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* Set to 0 if DSC minor version is 1 or native420 is 0. |
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* PPS89[7:5] - Reserved |
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*/ |
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u8 second_line_bpg_offset; |
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/** |
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* @nsl_bpg_offset: |
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* PPS90[7:0], PPS91[7:0] - Number of bits that are deallocated |
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* for each group that is not in the second line of a slice. |
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*/ |
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__be16 nsl_bpg_offset; |
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/** |
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* @second_line_offset_adj: |
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* PPS92[7:0], PPS93[7:0] - Used as offset adjustment for the second |
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* line in Native 4:2:0 mode. |
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*/ |
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__be16 second_line_offset_adj; |
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/** |
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* @pps_long_94_reserved: |
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* PPS 94, 95, 96, 97 - Reserved |
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*/ |
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u32 pps_long_94_reserved; |
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/** |
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* @pps_long_98_reserved: |
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* PPS 98, 99, 100, 101 - Reserved |
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*/ |
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u32 pps_long_98_reserved; |
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/** |
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* @pps_long_102_reserved: |
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* PPS 102, 103, 104, 105 - Reserved |
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*/ |
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u32 pps_long_102_reserved; |
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/** |
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* @pps_long_106_reserved: |
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* PPS 106, 107, 108, 109 - reserved |
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*/ |
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u32 pps_long_106_reserved; |
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/** |
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* @pps_long_110_reserved: |
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* PPS 110, 111, 112, 113 - reserved |
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*/ |
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u32 pps_long_110_reserved; |
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/** |
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* @pps_long_114_reserved: |
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* PPS 114 - 117 - reserved |
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*/ |
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u32 pps_long_114_reserved; |
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/** |
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* @pps_long_118_reserved: |
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* PPS 118 - 121 - reserved |
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*/ |
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u32 pps_long_118_reserved; |
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/** |
|
* @pps_long_122_reserved: |
|
* PPS 122- 125 - reserved |
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*/ |
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u32 pps_long_122_reserved; |
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/** |
|
* @pps_short_126_reserved: |
|
* PPS 126, 127 - reserved |
|
*/ |
|
__be16 pps_short_126_reserved; |
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} __packed; |
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/** |
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* struct drm_dsc_pps_infoframe - DSC infoframe carrying the Picture Parameter |
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* Set Metadata |
|
* |
|
* This structure represents the DSC PPS infoframe required to send the Picture |
|
* Parameter Set metadata required before enabling VESA Display Stream |
|
* Compression. This is based on the DP Secondary Data Packet structure and |
|
* comprises of SDP Header as defined &struct dp_sdp_header in drm_dp_helper.h |
|
* and PPS payload defined in &struct drm_dsc_picture_parameter_set. |
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* |
|
* @pps_header: Header for PPS as per DP SDP header format of type |
|
* &struct dp_sdp_header |
|
* @pps_payload: PPS payload fields as per DSC specification Table 4-1 |
|
* as represented in &struct drm_dsc_picture_parameter_set |
|
*/ |
|
struct drm_dsc_pps_infoframe { |
|
struct dp_sdp_header pps_header; |
|
struct drm_dsc_picture_parameter_set pps_payload; |
|
} __packed; |
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|
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void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header); |
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int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size); |
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void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp, |
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const struct drm_dsc_config *dsc_cfg); |
|
int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg); |
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|
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#endif /* _DRM_DSC_H_ */
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