DisplayPort Intel® FPGA IP User Guide

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ID 683273
Date 9/02/2022
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Document Table of Contents
Document Table of Contents x
1. DisplayPort Intel® FPGA IP Quick Reference 2. About This IP 3. Getting Started 4. DisplayPort Intel® FPGA IP Hardware Design Examples 5. DisplayPort Source 6. DisplayPort Sink 7. DisplayPort Intel® FPGA IP Parameters 8. DisplayPort Intel® FPGA IP Simulation Example 9. DisplayPort API Reference 10. DisplayPort Source Register Map and DPCD Locations 11. DisplayPort Sink Register Map and DPCD Locations 12. DisplayPort Intel® FPGA IP User Guide Archives 13. Document Revision History for the DisplayPort Intel® FPGA IP User Guide
1. DisplayPort Intel® FPGA IP Quick Reference x
1.1. DisplayPort Terms and Acronyms
2. About This IP x
2.1. Release Information 2.2. Device Family Support 2.3. IP Core Verification 2.4. Performance and Resource Utilization
3. Getting Started x
3.1. Installing and Licensing Intel® FPGA IP Cores 3.2. Specifying IP Parameters and Options 3.3. Simulating the Design 3.4. Compiling the Full Design and Programming the FPGA 3.5. Calculating Video Bandwidth and Recovered Pixel Clock Frequency
3.1. Installing and Licensing Intel® FPGA IP Cores x
3.1.1. Intel® FPGA IP Evaluation Mode
3.3. Simulating the Design x
3.3.1. Simulating with the ModelSim Simulator
4. DisplayPort Intel® FPGA IP Hardware Design Examples x
4.1. DisplayPort Intel® FPGA IP Hardware Design Examples for Intel® Arria® 10, Intel® Cyclone® 10 GX, Intel® Stratix® 10, and Intel® Agilex™ F-Tile Devices 4.2. HDCP Over DisplayPort Design Example for Intel® Arria® 10 and Intel® Stratix® 10 Devices 4.3. DisplayPort Intel® FPGA IP Hardware Design Examples for Arria V, Cyclone V, and Stratix V Devices
4.3. DisplayPort Intel® FPGA IP Hardware Design Examples for Arria V, Cyclone V, and Stratix V Devices x
4.3.1. Clock Recovery Core 4.3.2. Transceiver and Clocking 4.3.3. Required Hardware 4.3.4. Design Walkthrough 4.3.5. DisplayPort Link Training Flow 4.3.6. DisplayPort Post Link Training Adjust Request Flow (LQA) 4.3.7. DisplayPort MST Source User Application
4.3.1. Clock Recovery Core x
4.3.1.1. Clock Recovery Core Parameters 4.3.1.2. Clock Recovery Interface
4.3.1.2. Clock Recovery Interface x
4.3.1.2.1. Video Input Port
4.3.4. Design Walkthrough x
4.3.4.1. Set Up the Hardware 4.3.4.2. Copy the Design Files to Your Working Directory 4.3.4.3. Build the FPGA Design 4.3.4.4. Load and Run the Software 4.3.4.5. View the Results
5. DisplayPort Source x
5.1. IP to Transceiver Parallel Data Interface Width 5.2. Main Data Path 5.3. Controller Interface 5.4. Sideband Channel 5.5. Source Embedded DisplayPort (eDP) Support 5.6. HDCP 1.3 TX Architecture 5.7. HDCP 2.3 TX Architecture 5.8. Source Interfaces 5.9. Source Clock Tree
5.2. Main Data Path x
5.2.1. Video Packetizer Path 5.2.2. Video Geometry Measurement Path 5.2.3. Audio and Secondary Stream Encoder Path 5.2.4. Training and Link Quality Patterns Generator
5.2.4. Training and Link Quality Patterns Generator x
5.2.4.1. DP1.4 (8B/10B Channel Coding) 5.2.4.2. DP2.0 (128B/132B Channel Coding)
5.8. Source Interfaces x
5.8.1. Controller Interface 5.8.2. AUX Interface 5.8.3. Video Interface 5.8.4. TX Transceiver Interface 5.8.5. Transceiver Reconfiguration Interface 5.8.6. Transceiver Analog Reconfiguration Interface 5.8.7. Secondary Stream Interface 5.8.8. Audio Interface
5.8.3. Video Interface x
5.8.3.1. Video Interface (TX Video IM Enable = 0) 5.8.3.2. Video Interface (TX Video IM Enable = 1) 5.8.3.3. Video Interface (Enable Active Video Data Protocols = AXIS-VVP Full)
6. DisplayPort Sink x
6.1. Transceiver to IP Parallel Data Interface Width 6.2. Sink Embedded DisplayPort (eDP) Support 6.3. Sink Non-GPU Mode Support 6.4. HDCP 1.3 RX Architecture 6.5. HDCP 2.3 RX Architecture 6.6. Sink Interfaces 6.7. Sink Clock Tree
6.6. Sink Interfaces x
6.6.1. Controller Interface 6.6.2. AUX Interface 6.6.3. Debugging Interface 6.6.4. Video Interface 6.6.5. Video Interface (Enable Active Video Data Protocols = AXIS-VVP Full) 6.6.6. Clocked Video Input Interface 6.6.7. RX Transceiver Interface 6.6.8. Transceiver Reconfiguration Interface 6.6.9. Secondary Stream Interface 6.6.10. Audio Interface 6.6.11. Non-GPU Mode EDID Interface 6.6.12. MSA Interface
6.6.2. AUX Interface x
6.6.2.1. AUX Debug Interface 6.6.2.2. EDID Interface
6.6.3. Debugging Interface x
6.6.3.1. Link Parameters Interface 6.6.3.2. Video Stream Out Interface
7. DisplayPort Intel® FPGA IP Parameters x
7.1. DisplayPort Intel® FPGA IP Source Parameters 7.2. DisplayPort Intel® FPGA IP Sink Parameters
8. DisplayPort Intel® FPGA IP Simulation Example x
8.1. Design Walkthrough
8.1. Design Walkthrough x
8.1.1. Copy the Simulation Files to Your Working Directory 8.1.2. Generate the IP Simulation Files and Scripts, and Compile and Simulate 8.1.3. View the Results
9. DisplayPort API Reference x
9.1. Using the Library 9.2. btc_dprx_syslib API Reference 9.3. btc_dprx_aux_get_request 9.4. btc_dprx_aux_handler 9.5. btc_dprx_aux_post_reply 9.6. btc_dprx_baseaddr 9.7. btc_dprx_dpcd_gpu_access 9.8. btc_dprx_edid_set 9.9. btc_dprx_hpd_get 9.10. btc_dprx_hpd_pulse 9.11. btc_dprx_hpd_set 9.12. btc_dprx_lt_eyeq_init 9.13. btc_dprx_lt_force 9.14. btc_dprx_rtl_ver 9.15. btc_dprx_sw_ver 9.16. btc_dprx_syslib_add_rx 9.17. btc_dprx_syslib_info 9.18. btc_dprx_syslib_init 9.19. btc_dprx_syslib_monitor 9.20. btc_dprx_mst_link_addr_rep_set 9.21. btc_dprx_mst_conn_stat_notify_req 9.22. btc_dprx_mst_conn_stat_notify_rep 9.23. btc_dptx_syslib API Reference 9.24. btc_dptx_aux_i2c_read 9.25. btc_dptx_aux_i2c_write 9.26. btc_dptx_aux_read 9.27. btc_dptx_aux_write 9.28. btc_dptx_baseaddr 9.29. btc_dptx_edid_block_read 9.30. btc_dptx_edid_read 9.31. btc_dptx_fast_link_training 9.32. btc_dptx_hpd_change 9.33. btc_dptx_is_link_up 9.34. btc_dptx_link_bw 9.35. btc_dptx_link_training 9.36. btc_dptx_rtl_ver 9.37. btc_dptx_set_color_space 9.38. btc_dptx_sw_ver 9.39. btc_dptx_syslib_add_tx 9.40. btc_dptx_syslib_init 9.41. btc_dptx_syslib_monitor 9.42. btc_dptx_test_autom 9.43. btc_dptx_video_enable 9.44. btc_dptx_mst_allocate_payload_rep 9.45. btc_dptx_mst_allocate_payload_req 9.46. btc_dptx_mst_clear_payload_table_rep 9.47. btc_dptx_mst_clear_payload_table_req 9.48. btc_dptx_mst_conn_stat_notify_req 9.49. btc_dptx_mst_down_rep_irq 9.50. btc_dptx_mst_enable 9.51. btc_dptx_mst_enum_path_rep 9.52. btc_dptx_mst_enum_path_req 9.53. btc_dptx_mst_get_msg_transact_ver_rep 9.54. btc_dptx_mst_get_msg_transact_ver_req 9.55. btc_dptx_mst_link_address_rep 9.56. btc_dptx_mst_link_address_req 9.57. btc_dptx_mst_remote_dpcd_wr_rep 9.58. btc_dptx_mst_remote_dpcd_wr_req 9.59. btc_dptx_mst_remote_i2c_rd_rep 9.60. btc_dptx_mst_remote_i2c_rd_req 9.61. btc_dptx_mst_set_color_space 9.62. btc_dptx_mst_tavgts_set 9.63. btc_dptx_mst_up_req_irq 9.64. btc_dptx_mst_vcpid_set 9.65. btc_dptx_mst_vcptab_addvc 9.66. btc_dptx_mst_vcptab_clear 9.67. btc_dptx_mst_vcptab_delvc 9.68. btc_dptx_mst_vcptab_update 9.69. btc_dptxll_syslib API Reference 9.70. btc_dptxll_hpd_change 9.71. btc_dptxll_hpd_irq 9.72. btc_dptxll_mst_cmp_ports 9.73. btc_dptxll_mst_edid_read_rep 9.74. btc_dptxll_mst_edid_read_req 9.75. btc_dptxll_mst_get_device_ports 9.76. btc_dptxll_mst_set_csn_callback 9.77. btc_dptxll_mst_topology_discover 9.78. btc_dptxll_stream_allocate_rep 9.79. btc_dptxll_stream_allocate_req 9.80. btc_dptxll_stream_calc_VCP_size 9.81. btc_dptxll_stream_delete_rep 9.82. btc_dptxll_stream_delete_req 9.83. btc_dptxll_stream_get 9.84. btc_dptxll_stream_set_color_space 9.85. btc_dptxll_stream_set_pixel_rate 9.86. btc_dptxll_sw_ver 9.87. btc_dptxll_syslib_add_tx 9.88. btc_dptxll_syslib_init 9.89. btc_dptxll_syslib_monitor 9.90. btc_dpxx_syslib Additional Types 9.91. btc_dprx_syslib Supported DPCD Locations
10. DisplayPort Source Register Map and DPCD Locations x
10.1. Source General Registers 10.2. Source MSA Registers 10.3. Source Link PHY Control and Status 10.4. Source Timestamp 10.5. Source CRC Registers 10.6. Source Audio Registers 10.7. Source MST Registers 10.8. Source AUX Controller Interface 10.9. Source-Supported DPCD Locations 10.10. Source AXI2CV Registers
10.1. Source General Registers x
10.1.1. DPTX_TX_CONTROL 10.1.2. DPTX_TX_STATUS 10.1.3. DPTX_TX_VERSION
10.2. Source MSA Registers x
10.2.1. DPTX0_MSA_MVID 10.2.2. DPTX0_MSA_NVID 10.2.3. DPTX0_MSA_HTOTAL 10.2.4. DPTX0_MSA_VTOTAL 10.2.5. DPTX0_MSA_HSP 10.2.6. DPTX0_MSA_HSW 10.2.7. DPTX0_MSA_HSTART 10.2.8. DPTX0_MSA_VSTART 10.2.9. DPTX0_MSA_VSP 10.2.10. DPTX0_MSA_VSW 10.2.11. DPTX0_MSA_HWIDTH 10.2.12. DPTX0_MSA_VHEIGHT 10.2.13. DPTX0_MSA_MISC0 10.2.14. DPTX0_MSA_MISC1 10.2.15. DPTX0_MSA_COLOR 10.2.16. DPTX0_VBID
10.3. Source Link PHY Control and Status x
10.3.1. DPTX_PRE_VOLT0/DPTX_REG_TXFFE0 10.3.2. DPTX_PRE_VOLT1/DPTX_REG_TXFFE1 10.3.3. DPTX_PRE_VOLT2/DPTX_REG_TXFFE2 10.3.4. DPTX_PRE_VOLT3/DPTX_REG_TXFFE3 10.3.5. DPTX_RECONFIG 10.3.6. DPTX_TEST_80BIT_PATTERN1/DPTX_TEST_264BIT_PATTERN1 10.3.7. DPTX_TEST_80BIT_PATTERN2/DPTX_TEST_264BIT_PATTERN2 10.3.8. DPTX_TEST_80BIT_PATTERN3/DPTX_TEST_264BIT_PATTERN3 10.3.9. DPTX_TEST_264BIT_PATTERN4 10.3.10. DPTX_TEST_264BIT_PATTERN5 10.3.11. DPTX_TEST_264BIT_PATTERN6 10.3.12. DPTX_TEST_264BIT_PATTERN7 10.3.13. DPTX_TEST_264BIT_PATTERN8 10.3.14. DPTX_TEST_264BIT_PATTERN9
10.7. Source MST Registers x
10.7.1. DPTX_MST_VCPTAB0 10.7.2. DPTX_MST_VCPTAB1 10.7.3. DPTX_MST_VCPTAB2 10.7.4. DPTX_MST_VCPTAB3 10.7.5. DPTX_MST_VCPTAB4 10.7.6. DPTX_MST_VCPTAB5 10.7.7. DPTX_MST_VCPTAB6 10.7.8. DPTX_MST_VCPTAB7 10.7.9. DPTX_MST_TAVG_TS
10.8. Source AUX Controller Interface x
10.8.1. DPTX_AUX_CONTROL 10.8.2. DPTX_AUX_COMMAND 10.8.3. DPTX_AUX_BYTE0 10.8.4. DPTX_AUX_BYTE1 10.8.5. DPTX_AUX_BYTE2 10.8.6. DPTX_AUX_BYTE3 10.8.7. DPTX_AUX_BYTE4 10.8.8. DPTX_AUX_BYTE5 10.8.9. DPTX_AUX_BYTE6 10.8.10. DPTX_AUX_BYTE7 10.8.11. DPTX_AUX_BYTE8 10.8.12. DPTX_AUX_BYTE9 10.8.13. DPTX_AUX_BYTE10 10.8.14. DPTX_AUX_BYTE11 10.8.15. DPTX_AUX_BYTE12 10.8.16. DPTX_AUX_BYTE13 10.8.17. DPTX_AUX_BYTE14 10.8.18. DPTX_AUX_BYTE15 10.8.19. DPTX_AUX_BYTE16 10.8.20. DPTX_AUX_BYTE17 10.8.21. DPTX_AUX_BYTE18 10.8.22. DPTX_AUX_RESET
10.10. Source AXI2CV Registers x
10.10.1. Source AXI2CV Registers Summary 10.10.2. Source AXI2CV Registers Description
10.10.2. Source AXI2CV Registers Description x
10.10.2.1. STATUS (0x50) 10.10.2.2. VIDEO_MODE_MATCH (0X51) 10.10.2.3. VIDEO_MODE_BANK_SELECT (0x53) 10.10.2.4. VIDEO_MODE_CONTROL (0x54) 10.10.2.5. VIDEO_MODE_SAMPLE_COUNT(0x55) 10.10.2.6. VIDEO_MODE_F0_LINE_COUNT (0x56) 10.10.2.7. VIDEO_MODE_F1_LINE_COUNT (0x57) 10.10.2.8. VIDEO_MODE_HORIZONTAL_FRONT_PORCH (0x58) 10.10.2.9. VIDEO_MODE_HORIZONTAL_SYNC_LENGTH (0x59) 10.10.2.10. VIDEO_MODE_HORIZONTAL_BLANKING (0x5A) 10.10.2.11. VIDEO_MODE_VERTICAL_FRONT_PORCH (0x5B) 10.10.2.12. VIDEO_MODE_VERTICAL_SYNC_LENGTH (0x5C) 10.10.2.13. VIDEO_MODE_VERTICAL_BLANKING (0x5D) 10.10.2.14. VIDEO_MODE_F0_VERTICAL_FRONT_PORCH (0x5E) 10.10.2.15. VIDEO_MODE_F0_VERTICAL_SYNC_LENGTH (0x5F) 10.10.2.16. VIDEO_MODE_F0_VERTICAL_BLANKING (0x60) 10.10.2.17. VIDEO_MODE_ACTIVE_PICTURE_LINE (0x61) 10.10.2.18. VIDEO_MODE_F0_VERTICAL_RISING (0x62) 10.10.2.19. VIDEO_MODE_FIELD_RISING (0x63) 10.10.2.20. VIDEO_MODE_FIELD_FALLING (0x64) 10.10.2.21. VIDEO_MODE_VALID (0x6D)
11. DisplayPort Sink Register Map and DPCD Locations x
11.1. Sink General Registers 11.2. Sink Timestamp 11.3. Sink Bit-Error Counters 11.4. FEC Registers 11.5. 128B/132B Link Quality Test Pattern Registers 11.6. Sink MSA Registers 11.7. Sink Audio Registers 11.8. Sink MST Registers 11.9. Sink AUX Controller Interface 11.10. Sink CRC Registers 11.11. Sink-Supported DPCD Locations 11.12. Sink CV2AXI Registers
11.1. Sink General Registers x
11.1.1. DPRX_RX_CONTROL 11.1.2. DPRX_RX_STATUS 11.1.3. DPRX_BER_CONTROL 11.1.4. DPRX_BER_CNT0 11.1.5. DPRX_BER_CNT1
11.3. Sink Bit-Error Counters x
11.3.1. DPRX_BER_CNTI0 11.3.2. DPRX_BER_CNTI1
11.4. FEC Registers x
11.4.1. DPRX_FEC_CONFIG 11.4.2. DPRX_FEC_ERROR_COUNT
11.5. 128B/132B Link Quality Test Pattern Registers x
11.5.1. DPRX_BER_TEST_PATTERN
11.6. Sink MSA Registers x
11.6.1. DPRX0_MSA_MVID 11.6.2. DPRX0_MSA_NVID 11.6.3. DPRX0_MSA_HTOTAL 11.6.4. DPRX0_MSA_VTOTAL 11.6.5. DPRX0_MSA_HSP 11.6.6. DPRX0_MSA_HSW 11.6.7. DPRX0_MSA_HSTART 11.6.8. DPRX0_MSA_VSTART 11.6.9. DPRX0_MSA_VSP 11.6.10. DPRX0_MSA_VSW 11.6.11. DPRX0_MSA_HWIDTH 11.6.12. DPRX0_MSA_VHEIGHT 11.6.13. DPRX0_MSA_MISC0 11.6.14. DPRX0_MSA_MISC1 11.6.15. DPRX0_MSA_COLOR 11.6.16. DPRX0_VBID
11.7. Sink Audio Registers x
11.7.1. DPRX0_AUD_MAUD 11.7.2. DPRX0_AUD_NAUD 11.7.3. DPRX0_AUD_AIF0 11.7.4. DPRX0_AUD_AIF1 11.7.5. DPRX0_AUD_AIF2 11.7.6. DPRX0_AUD_AIF3 11.7.7. DPRX0_AUD_AIF4
11.8. Sink MST Registers x
11.8.1. DPRX_MST_VCPTAB0 11.8.2. DPRX_MST_VCPTAB1 11.8.3. DPRX_MST_VCPTAB2 11.8.4. DPRX_MST_VCPTAB3 11.8.5. DPRX_MST_VCPTAB4 11.8.6. DPRX_MST_VCPTAB5 11.8.7. DPRX_MST_VCPTAB6 11.8.8. DPRX_MST_VCPTAB7
11.9. Sink AUX Controller Interface x
11.9.1. DPRX_AUX_CONTROL 11.9.2. DPRX_AUX_STATUS 11.9.3. DPRX_AUX_COMMAND 11.9.4. DPRX_AUX_BYTE0 11.9.5. DPRX_AUX_BYTE1 11.9.6. DPRX_AUX_BYTE2 11.9.7. DPRX_AUX_BYTE3 11.9.8. DPRX_AUX_BYTE4 11.9.9. DPRX_AUX_BYTE5 11.9.10. DPRX_AUX_BYTE6 11.9.11. DPRX_AUX_BYTE7 11.9.12. DPRX_AUX_BYTE8 11.9.13. DPRX_AUX_BYTE9 11.9.14. DPRX_AUX_BYTE10 11.9.15. DPRX_AUX_BYTE11 11.9.16. DPRX_AUX_BYTE12 11.9.17. DPRX_AUX_BYTE13 11.9.18. DPRX_AUX_BYTE14 11.9.19. DPRX_AUX_BYTE15 11.9.20. DPRX_AUX_BYTE16 11.9.21. DPRX_AUX_BYTE17 11.9.22. DPRX_AUX_BYTE18 11.9.23. DPRX_AUX_I2C0 11.9.24. DPRX_AUX_I2C1 11.9.25. DPRX_AUX_RESET 11.9.26. DPRX_AUX_HPD
11.12. Sink CV2AXI Registers x
11.12.1. Sink CV2AXI Registers Summary 11.12.2. Sink CV2AXI Registers Description
11.12.2. Sink CV2AXI Registers Description x
11.12.2.1. STATUS (0x50) 11.12.2.2. ACTIVE SAMPLE COUNT (0x52) 11.12.2.3. F0_ACTIVE_LINE_COUNT (0x53) 11.12.2.4. F1_ACTIVE_LINE_COUNT (0x54) 11.12.2.5. TOTAL_SAMPLE_COUNT (0x55) 11.12.2.6. F0_TOTAL_LINE_COUNT (0x56) 11.12.2.7. F1_TOTAL_LINE_COUNT (0x57) 11.12.2.8. COLOR_PATTERN (0x5C) 11.12.2.9. CONTROL (0x64)
1. DisplayPort Intel® FPGA IP Quick Reference
2. About This IP
3. Getting Started
4. DisplayPort Intel® FPGA IP Hardware Design Examples
5. DisplayPort Source
6. DisplayPort Sink
7. DisplayPort Intel® FPGA IP Parameters
8. DisplayPort Intel® FPGA IP Simulation Example
9. DisplayPort API Reference
10. DisplayPort Source Register Map and DPCD Locations
11. DisplayPort Sink Register Map and DPCD Locations
12. DisplayPort Intel® FPGA IP User Guide Archives
13. Document Revision History for the DisplayPort Intel® FPGA IP User Guide

5.8.3.1. Video Interface (TX Video IM Enable = 0)

If you do not enable the video image interface feature, the core uses the traditional HSYNC/VSYNC/DE video input interface (txN_video_in).

You specify the data input width through the Maximum video input color depth parameter. The same input port transfers RGB and YCbCr data in 4:4:4, 4:2:2, or 4:2:0 color format. Data is most-significant bit aligned.

Figure 18. Video Input Data Format18 bpp to 48 bpp for RGB/YCbCr 4:4:4, 16 bpp to 32 bpp for YCbCr 4:2:2, and 12 bpp to 24 bpp for YCbCr 4:2:0 port width when txN_video_in port width is 48 (Maximum video input color depth = 16 bpc, Pixel input mode = Single)
Table 33.  Video Ports for 4:2:2 and 4:2:0 Color Formats
Color Format Description
Sub-sampled 4:2:2 color format
  • Video port bits 47:32 are unused
  • Video port bits 31:16 always transfer the Y component
  • Video port bits 15:0 always transfer the alternate Cb or Cr component
Sub-sampled 4:2:0 color format
  • For even lines (starting with line 0)
    • Video port bits 47:32 always transfer the Yn+1 component.
    • Video port bits 31:16 always transfer the Yn component.
    • Video port bits 15:0 always transfer the Cbn component.
  • For odd lines
    • Video port bits 47:32 always transfer the Yn+1 component.
    • Video port bits 31:16 always transfer the Yn component.
    • Video port bits 15:0 always transfer the Crn component.
Note: The frequency of txN_vid_clk must be halved when YCbCr 4:2:0 is used because two pixels are fed into a single clock cycle.
Table 34.  YCbCr 4:2:0 Input Data Ordering Compared to RGB 4:4:4
Pixel Indexes R Position G Position B Position

0 and 1

Y1

Y0
  • Cb0 (Even lines)
  • Cr0 (Odd lines)

2 and 3

Y3

Y2
  • Cb2 (Even lines)
  • Cr2 (Odd lines)

4 and 5

Y5

Y4
  • Cb4 (Even lines)
  • Cr4 (Odd lines)
... ... ... ...

If you set Pixel input mode to Dual or Quad, the IP sends two or four pixels in parallel, respectively. To support video resolutions with horizontal active, front porch, or back porch of a length not divisible by 2 or 4, the data enable, horizontal sync, and vertical sync signals are widened.

The following figure shows the pixel data order from the least significant bits to the most significant bits.

Figure 19. Video Input Data AlignmentFor RGB 18 bpp when txN_video_in port width is 96 (Maximum video input color depth = 8 bpc, Pixel input mode = Quad).
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