Public Version
Display Subsystem Functional Description
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•
RGB16 (no reduction is possible for RGB24 packed and unpacked formats)
The benefits of the video DMA optimization, when the feature is enabled, are:
•
The L3 interconnect traffic is reduced by a factor of 2x (only for YUV4:2:2 pixel format)
•
The DDR memory traffic is reduced by a factor of 2x (for YUV4:2:2 and RGB16 pixel formats)
For more information about the configuration settings for video DMA optimization, see
Video DMA Optimization.
NOTE:
The DMA optimization feature must be used only for YUV and RGB16 formats when 90- or
270-degree rotation is required. In all other configurations, the
[20] VIDDMAOPTIMIZATION bit must be kept at reset value
(0x0).
7.4.2.9
Multiple Buffer Support
Users update the base address of the buffer when the update of the working buffer has finished and is
ready to be displayed. The register that contains the base address of the buffer is a shadow register that
is read by the hardware at the next Vertical Front Porch (VFP).
7.4.3 DSI Protocol Engine Functionalities
NOTE:
Copyright ©2005-2008 MIPI Alliance, Inc. All rights reserved. MIPI Alliance Member
Confidential.
The DSI protocol engine integrates DSI interface to the display through the DSI DSI_PHY module, L4
interconnect interface and video interface from the display controller. The DSI DSI_PHY or complex I/O
module is detailed in
. The DSI transmitter (protocol PHY) port can be connected to
multiple displays using a single DSI host port. The DSI protocol engine controls the DSI PLL control
module detailed in
. The DSI transmitter port can be used in video mode or/and command
mode.
7.4.3.1
DSI Protocol Architecture
The DSI protocol engine receives data from the video port and/or the L4 interconnect slave port,
encapsulates them with the VC ID, generates the ECC and check-sum, and splits the data into byte
stream to the DSI_PHY to be sent using the low-speed (LS) or high-speed (HS) protocol. The DSI protocol
engine receives data and acknowledge from the display using the same DSI link in case of bidirectional
display. Multiple data streams can be interleaved to support multiple panels connected to the same host
DSI port.
details the DSI protocol engine architecture.
1658
Display Subsystem
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
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Страница 692: ...692 MPU Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1084: ...1084 IVA2 2 Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1990: ...1990 2D 3D Graphics Accelerator SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2334: ...2334 Memory Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2700: ...2700 Memory Management Units SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2868: ...2868 HDQ 1 Wire SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2974: ...2974 UART IrDA CIR SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3054: ...3054 Multichannel SPI SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3462: ...3462 MMC SD SDIO Card Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3508: ...3508 General Purpose Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3584: ...3584 Initialization SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3648: ...3648 Debug and Emulation SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...