This patch needs to now incorporate the newly added slice_row_per_frame parameter in PPS_16.
Anusha
>-----Original Message-----
>From: Navare, Manasi D
>Sent: Tuesday, July 31, 2018 2:07 PM
>To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>Cc: Navare, Manasi D <manasi.d.navare@xxxxxxxxx>; Singh, Gaurav K
><gaurav.k.singh@xxxxxxxxx>; dri-devel@xxxxxxxxxxxxxxxxxxxxx; Jani Nikula
><jani.nikula@xxxxxxxxxxxxxxx>; Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>;
>Srivatsa, Anusha <anusha.srivatsa@xxxxxxxxx>; Harry Wentland
><harry.wentland@xxxxxxx>
>Subject: [PATCH v2 07/23] drm/dsc: Define Display Stream Compression PPS
>infoframe
>
>This patch defines a new header file for all the DSC 1.2 structures and creates a
>structure for PPS infoframe which will be used to send picture parameter set
>secondary data packet for display stream compression.
>All the PPS infoframe syntax elements are taken from DSC 1.2 specification from
>VESA.
>
>Cc: Gaurav K Singh <gaurav.k.singh@xxxxxxxxx>
>Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
>Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
>Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
>Cc: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
>Cc: Harry Wentland <harry.wentland@xxxxxxx>
>Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
>---
> include/drm/drm_dsc.h | 365
>++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 365 insertions(+)
> create mode 100644 include/drm/drm_dsc.h
>
>diff --git a/include/drm/drm_dsc.h b/include/drm/drm_dsc.h new file mode
>100644 index 0000000..678e8e6
>--- /dev/null
>+++ b/include/drm/drm_dsc.h
>@@ -0,0 +1,365 @@
>+/*
>+ * Copyright (C) 2018 Intel Corp.
>+ *
>+ * Permission is hereby granted, free of charge, to any person
>+obtaining a
>+ * copy of this software and associated documentation files (the
>+"Software"),
>+ * to deal in the Software without restriction, including without
>+limitation
>+ * the rights to use, copy, modify, merge, publish, distribute,
>+sublicense,
>+ * and/or sell copies of the Software, and to permit persons to whom
>+the
>+ * Software is furnished to do so, subject to the following conditions:
>+ *
>+ * The above copyright notice and this permission notice shall be
>+included in
>+ * all copies or substantial portions of the Software.
>+ *
>+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
>+EXPRESS OR
>+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
>+MERCHANTABILITY,
>+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
>EVENT
>+SHALL
>+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM,
>+DAMAGES OR
>+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
>+OTHERWISE,
>+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
>USE
>+OR
>+ * OTHER DEALINGS IN THE SOFTWARE.
>+ *
>+ * Authors:
>+ * Manasi Navare <manasi.d.navare@xxxxxxxxx> */
>+
>+#ifndef DRM_DSC_H_
>+#define DRM_DSC_H_
>+
>+#include <drm/drm_dp_helper.h>
>+
>+/* VESA Display Stream Compression DSC 1.2 constants */
>+#define DSC_NUM_BUF_RANGES 15
>+
>+/**
>+ * struct picture_parameter_set - Represents 128 bytes of Picture
>+Parameter Set
>+ *
>+ * The VESA DSC standard defines picture parameter set (PPS) which
>+display
>+ * stream compression encoders must communicate to decoders.
>+ * The PPS is encapsulated in 128 bytes (PPS 0 through PPS 127). The
>+fields in
>+ * this structure are as per Table 4.1 in Vesa DSC specification v1.1/v1.2.
>+ * The PPS fields that span over more than a byte should be stored in
>+Big Endian
>+ * format.
>+ */
>+struct picture_parameter_set {
>+ /**
>+ * @dsc_version:
>+ * PPS0[3:0] - dsc_version_minor: Contains Minor version of DSC
>+ * PPS0[7:4] - dsc_version_major: Contains major version of DSC
>+ */
>+ u8 dsc_version;
>+ /**
>+ * @pps_identifier:
>+ * PPS1[7:0] - Application specific identifier that can be
>+ * used to differentiate between different PPS tables.
>+ */
>+ u8 pps_identifier;
>+ /**
>+ * @pps_reserved:
>+ * PPS2[7:0]- RESERVED Byte
>+ */
>+ u8 pps_reserved;
>+ /**
>+ * @pps_3:
>+ * PPS3[3:0] - linebuf_depth: Contains linebuffer bit depth used to
>+ * generate the bitstream. (0x0 - 16 bits for DSC 1.2, 0x8 - 8 bits,
>+ * 0xA - 10 bits, 0xB - 11 bits, 0xC - 12 bits, 0xD - 13 bits,
>+ * 0xE - 14 bits for DSC1.2, 0xF - 14 bits for DSC 1.2.
>+ * PPS3[7:4] - bits_per_component: Bits per component for the original
>+ * pixels of the encoded picture.
>+ * 0x0 = 16bpc (allowed only when dsc_version_minor = 0x2)
>+ * 0x8 = 8bpc, 0xA = 10bpc, 0xC = 12bpc, 0xE = 14bpc (also
>+ * allowed only when dsc_minor_version = 0x2)
>+ */
>+ u8 pps_3;
>+ /**
>+ * @pps_4:
>+ * PPS4[1:0] -These are the most significant 2 bits of
>+ * compressed BPP bits_per_pixel[9:0] syntax element.
>+ * PPS4[2] - vbr_enable: 0 = VBR disabled, 1 = VBR enabled
>+ * PPS4[3] - simple_422: Indicates if decoder drops samples to
>+ * reconstruct the 4:2:2 picture.
>+ * PPS4[4] - Convert_rgb: Indicates if DSC color space conversion is
>+ * active.
>+ * PPS4[5] - blobk_pred_enable: Indicates if BP is used to code any
>+ * groups in picture
>+ * PPS4[7:6] - Reseved bits
>+ */
>+ u8 pps_4;
>+ /**
>+ * @bits_per_pixel_low:
>+ * PPS5[7:0] - This indicates the lower significant 8 bits of
>+ * the compressed BPP bits_per_pixel[9:0] element.
>+ */
>+ u8 bits_per_pixel_low;
>+ /**
>+ * @pic_height:
>+ * PPS6[7:0], PPS7[7:0] -pic_height: Specifies the number of pixel rows
>+ * within the raster.
>+ */
>+ __be16 pic_height;
>+ /**
>+ * @pic_width:
>+ * PPS8[7:0], PPS9[7:0] - pic_width: Number of pixel columns within
>+ * the raster.
>+ */
>+ __be16 pic_width;
>+ /**
>+ * @slice_height:
>+ * PPS10[7:0], PPS11[7:0] - Slice height in units of pixels.
>+ */
>+ __be16 slice_height;
>+ /**
>+ * @slice_width:
>+ * PPS12[7:0], PPS13[7:0] - Slice width in terms of pixels.
>+ */
>+ __be16 slice_width;
>+ /**
>+ * @chunk_size:
>+ * PPS14[7:0], PPS15[7:0] - Size in units of bytes of the chunks
>+ * that are used for slice multiplexing.
>+ */
>+ __be16 chunk_size;
>+ /**
>+ * @initial_xmit_delay_high:
>+ * PPS16[1:0] - Most Significant two bits of initial transmission delay.
>+ * It specifies the number of pixel times that the encoder waits before
>+ * transmitting data from its rate buffer.
>+ * PPS16[7:2] - Reserved
>+ */
>+ u8 initial_xmit_delay_high;
>+ /**
>+ * @initial_xmit_delay_low:
>+ * PPS17[7:0] - Least significant 8 bits of initial transmission delay.
>+ */
>+ u8 initial_xmit_delay_low;
>+ /**
>+ * @initial_dec_delay:
>+ *
>+ * PPS18[7:0], PPS19[7:0] - Initial decoding delay which is the number
>+ * of pixel times that the decoder accumulates data in its rate buffer
>+ * before starting to decode and output pixels.
>+ */
>+ __be16 initial_dec_delay;
>+ /**
>+ * @pps20_reserved:
>+ *
>+ * PPS20[7:0] - Reserved
>+ */
>+ u8 pps20_reserved;
>+ /**
>+ * @initial_scale_value:
>+ * PPS21[5:0] - Initial rcXformScale factor used at beginning
>+ * of a slice.
>+ * PPS21[7:6] - Reserved
>+ */
>+ u8 initial_scale_value;
>+ /**
>+ * @scale_increment_interval:
>+ * PPS22[7:0], PPS23[7:0] - Number of group times between incrementing
>+ * the rcXformScale factor at end of a slice.
>+ */
>+ __be16 scale_increment_interval;
>+ /**
>+ * @scale_decrement_interval_high:
>+ * PPS24[3:0] - Higher 4 bits indicating number of group times between
>+ * decrementing the rcXformScale factor at beginning of a slice.
>+ * PPS24[7:4] - Reserved
>+ */
>+ u8 scale_decrement_interval_high;
>+ /**
>+ * @scale_decrement_interval_low:
>+ * PPS25[7:0] - Lower 8 bits of scale decrement interval
>+ */
>+ u8 scale_decrement_interval_low;
>+ /**
>+ * @pps26_reserved:
>+ * PPS26[7:0]
>+ */
>+ u8 pps26_reserved;
>+ /**
>+ * @first_line_bpg_offset:
>+ * PPS27[4:0] - Number of additional bits that are allocated
>+ * for each group on first line of a slice.
>+ * PPS27[7:5] - Reserved
>+ */
>+ u8 first_line_bpg_offset;
>+ /**
>+ * @nfl_bpg_offset:
>+ * PPS28[7:0], PPS29[7:0] - Number of bits including frac bits
>+ * deallocated for each group for groups after the first line of slice.
>+ */
>+ __be16 nfl_bpg_offset;
>+ /**
>+ * @slice_bpg_offset:
>+ * PPS30, PPS31[7:0] - Number of bits that are deallocated for each
>+ * group to enforce the slice constraint.
>+ */
>+ __be16 slice_bpg_offset;
>+ /**
>+ * @initial_offset:
>+ * PPS32,33[7:0] - Initial value for rcXformOffset
>+ */
>+ __be16 initial_offset;
>+ /**
>+ * @final_offset:
>+ * PPS34,35[7:0] - Maximum end-of-slice value for rcXformOffset
>+ */
>+ __be16 final_offset;
>+ /**
>+ * @flatness_min_qp:
>+ * PPS36[4:0] - Minimum QP at which flatness is signaled and
>+ * flatness QP adjustment is made.
>+ * PPS36[7:5] - Reserved
>+ */
>+ u8 flatness_min_qp;
>+ /**
>+ * @flatness_max_qp:
>+ * PPS37[4:0] - Max QP at which flatness is signalled and
>+ * the flatness adjustment is made.
>+ * PPS37[7:5] - Reserved
>+ */
>+ u8 flatness_max_qp;
>+ /**
>+ * @rc_model_size:
>+ * PPS38,39[7:0] - Number of bits within RC Model.
>+ */
>+ __be16 rc_model_size;
>+ /**
>+ * @rc_edge_factor:
>+ * PPS40[3:0] - Ratio of current activity vs, previous
>+ * activity to determine presence of edge.
>+ * PPS40[7:4] - Reserved
>+ */
>+ u8 rc_edge_factor;
>+ /**
>+ * @rc_quant_incr_limit0:
>+ * PPS41[4:0] - QP threshold used in short term RC
>+ * PPS41[7:5] - Reserved
>+ */
>+ u8 rc_quant_incr_limit0;
>+ /**
>+ * @rc_quant_incr_limit1:
>+ * PPS42[4:0] - QP threshold used in short term RC
>+ * PPS42[7:5] - Reserved
>+ */
>+ u8 rc_quant_incr_limit1;
>+ /**
>+ * @rc_tgt_offset:
>+ * PPS43[3:0] - Lower end of the variability range around the target
>+ * bits per group that is allowed by short term RC.
>+ * PPS43[7:4]- Upper end of the variability range around the target
>+ * bits per group that i allowed by short term rc.
>+ */
>+ u8 rc_tgt_offset;
>+ /**
>+ * @rc_buf_thresh:
>+ * PPS44[7:0] - PPS57[7:0] - Specifies the thresholds in RC model for
>+ * the 15 ranges defined by 14 thresholds.
>+ */
>+ u8 rc_buf_thresh[DSC_NUM_BUF_RANGES - 1];
>+ /**
>+ * @rc_range_parameters:
>+ * PPS58[7:0] - PPS87[7:0]
>+ * Parameters that correspond to each of the 15 ranges.
>+ */
>+ __be16 rc_range_parameters[DSC_NUM_BUF_RANGES];
>+ /**
>+ * @native_422_420:
>+ * PPS88[0] - 0 = Native 4:2:2 not used
>+ * 1 = Native 4:2:2 used
>+ * PPS88[1] - 0 = Native 4:2:0 not use
>+ * 1 = Native 4:2:0 used
>+ * PPS88[7:2] - Reserved 6 bits
>+ */
>+ u8 native_422_420;
>+ /**
>+ * @second_line_bpg_offset:
>+ * PPS89[4:0] - Additional bits/group budget for the
>+ * second line of a slice in Native 4:2:0 mode.
>+ * Set to 0 if DSC minor version is 1 or native420 is 0.
>+ * PPS89[7:5] - Reserved
>+ */
>+ u8 second_line_bpg_offset;
>+ /**
>+ * @nsl_bpg_offset:
>+ * PPS90[7:0], PPS91[7:0] - Number of bits that are deallocated
>+ * for each group that is not in the second line of a slice.
>+ */
>+ __be16 nsl_bpg_offset;
>+ /**
>+ * @second_line_offset_adj:
>+ * PPS92[7:0], PPS93[7:0] - Used as offset adjustment for the second
>+ * line in Native 4:2:0 mode.
>+ */
>+ __be16 second_line_offset_adj;
>+ /**
>+ * @pps_long_94_reserved:
>+ * PPS 94, 95, 96, 97 - Reserved
>+ */
>+ u32 pps_long_94_reserved;
>+ /**
>+ * @pps_long_98_reserved:
>+ * PPS 98, 99, 100, 101 - Reserved
>+ */
>+ u32 pps_long_98_reserved;
>+ /**
>+ * @pps_long_102_reserved:
>+ * PPS 102, 103, 104, 105 - Reserved
>+ */
>+ u32 pps_long_102_reserved;
>+ /**
>+ * @pps_long_106_reserved:
>+ * PPS 106, 107, 108, 109 - reserved
>+ */
>+ u32 pps_long_106_reserved;
>+ /**
>+ * @pps_long_110_reserved:
>+ * PPS 110, 111, 112, 113 - reserved
>+ */
>+ u32 pps_long_110_reserved;
>+ /**
>+ * @pps_long_114_reserved:
>+ * PPS 114 - 117 - reserved
>+ */
>+ u32 pps_long_114_reserved;
>+ /**
>+ * @pps_long_118_reserved:
>+ * PPS 118 - 121 - reserved
>+ */
>+ u32 pps_long_118_reserved;
>+ /**
>+ * @pps_long_122_reserved:
>+ * PPS 122- 125 - reserved
>+ */
>+ u32 pps_long_122_reserved;
>+ /**
>+ * @pps_short_126_reserved:
>+ * PPS 126, 127 - reserved
>+ */
>+ __be16 pps_short_126_reserved;
>+};
>+
>+/**
>+ * struct drm_dsc_pps_infoframe - DSC infoframe carrying the Picture
>+Parameter
>+ * 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 in drm_dp_helper.h and PPS payload.
>+ *
>+ * @pps_header:
>+ *
>+ * Header for PPS as per DP SDP header format
>+ *
>+ * @pps_payload:
>+ *
>+ * PPS payload fields as per DSC specification Table 4-1 */ struct
>+drm_dsc_pps_infoframe {
>+ struct dp_sdp_header pps_header;
>+ struct picture_parameter_set pps_payload; } __packed;
>+
>+#endif /* _DRM_DSC_H_ */
>--
>2.7.4
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