Figure 11-95 shows the TV formats supported.
The size of a TV output format is defined by:
- Number of lines, DISPC_SIZE_TV[27:16] LPP bit field, with a value from 1 to 4096
- Number of pixels per line, DISPC_SIZE_TV[11:0] PPL bit field, with a value from 1 to 4096
- Delta size between odd/even field, DISPC_SIZE_TV[15:14] DELTA_LPP bit field. This bit field controls only the output channel and not the size of the data field fetched from the frame buffer in memory.
The hold time of the pixels on the data bus is determined in clock cycles by the DISPC_CONTROL1[19:17] HT bit field. The default value at reset time is 0x0 (one cycle).
- When connected to the HDMI encoder, Table 11-90 indicates the DISPC_SIZE_TV (PPL and LPP) value for each HD standard.
Table 11-90 DISPC PPL and LLP Value for HD StandardStandards | | Active Pixels/Line | Active Lines | Digital Clock | DISPC_SIZE_TV |
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HDTV | 720p | 1280 | 720 | 74.25/74.125 MHz (60/59.99..frames/s) | 0x02CF 04FF |
1080i | 1920 | 540 | 74.25/74.125 MHz (60/59.99..frames/s) | 0x021B 07FF |
1080p | 1920 | 1080 | 148.5/148.25 MHz (60/59.99..frames/s) | 0x0437 07FF |
720p 3D (frame packing) | 1280 | 1470 | 148.5/148.35/148.5 MHz (60/59.94/50 frames/s) | 0x05BD 04FF |
1080p 3D (frame packing) | 1920 | 2205 | 148.5/148.35 MHz (24/23.98 frames/s) | 0x089C 07FF |
1080p 3D (side-by-side half) | 1920 | 1080 | 148.5 MHz (60 frames/s) | 0x0437 07FF |
Note: When configuring the DISPC for outputting any supported 3D frame-packing format, the following generic details must be considered:
- As defined by the HDMI v1.4a Specification, Section 8.2.3.2, 3D frame-packing is a video format structure composed of two stereoscopic pictures: left and right.
- The stereoscopic pictures can be processed through the three video pipelines (VID1, VID2, or VID3). For more information about the configuration of video pipelines, see Section 11.2.4.10, Video Pipelines.
- The 3D frame is generated by setting the TV overlay manager to combine the outputs of the selected video pipelines that hold the pictures. One video pipeline (VID1 or VID3) must carry the top field of the 3D frame (left stereoscopic picture), and the other video (VID2) pipeline must always carry the bottom field of the frame (right stereoscopic picture). The top and bottom fields are separated by an active space area. For more information, see the HDMI v1.4a Specification, Section 8.2.3.2.
- The pipeline carrying each field (top and bottom) of the 3D frame must have its height and width parameters defined in the [27:16] SIZEY and [10:0] SIZEX bit fields of the DISPC_VIDp_SIZE register, and its Y and X positions defined in the [26:16] POSY and [10:0] POSX bit fields of the DISPC_VIDp_POSITION register. The active space area of the 3D frame can be encoded by setting the solid background color for the TV output (the DISPC_DEFAULT_COLOR1[23:0] DEFAULTCOLOR bit field). For more information about the overlay mechanism, see Section 11.2.4.14.1, DISPC Overlay Manager.