TDA3LX: McASP / DISPLAY DRIVE

Bright Wang

Part Number: TDA3LX

HELLO HERE WE'RE DESIGNING DISPLAY CONTROL UNIT USING TDA3. AND HAVE SOME QUESTIONS ABOUT McASP AND DISPLAY DRIVE

1. HOW CAN WE ROUTE DIFFERENT AUDIO SOURCE FROM McASP 1 / 2 / 3? IS SOME REGISTER TABLE CONTAINS IN SDK / RTOS ?

2. CAN WE SET EITHER ONE OF McASP BYPASS MODE TO ANOTHER OUT FOR CODEC?

3. HOW CAN WE SET UP RELATIVE VALUES IN M4 DISPLAY CONTROLLER FOR DIMMING UP PANEL TO FIT IN DIFFERENT SPECIFICATION OF DISPLAY?

over 5 years ago

0 Prasad Konnur over 5 years ago

TI__Expert 6065 points

Hi,

Which software are you using?

The PDK drivers have an example for the audio, which you can refer.

Regarding the Display brightness, This is usually controlled by the LCD panel.
Which panel are you using? And can you check if it has any brightness programming through any control interface may be I2C.

Regards,
Prasad

0 Bright Wang over 5 years ago in reply to Prasad Konnur

Prodigy 220 points

HELLO PRASAD

ABOUT WHAT YOU ASKED "WHICH SOFTWARE ARE YOU USING". I'M NOT REALLY SURE WHAT DID YOU MEAN BY THAT. HERE ARE VERY FEW INSTRUCTIONS TO BRING UP TDA3 WITHOUT BUILT-IN ARM A15 CORE AND GPU BUT ONLY LISTED TOOLS IN TI'S WEBSITE AS BELOW:

1. SDK WITH LINUX AND RTOS PURPOSE FOR TDA2 PROCESSOR AT LEAST FOR TDAX WITH BUILT-IN A15 CORE AND GPU WHICH IS NOT SPECIFIC FOR TDA3

1-1. SO MY QUESTION IS WHERE CAN WE GET COMPLETE GUIDELINE FOR TDA3 ESPECIALLY

1-1-1. SYSTEM BRING UP USING TI RTOS

1-1-2. DDR CALIBRATION TOOL

1-1-3. PIN MUX TOOL

2. WHERE IS THE MENTIONED PDK DRIVERS?

2-1. CAN WE USE BUILT-IN DSP AS AUDIO DECODER? (WMA / MP3 / MP4) / OR THE DSP IS DESIGNED PURPOSED ON AUDIO ROUTING / SWITCH ONLY?

3. ABOUT DISPLAY

HERE IS IT

http://crm.steliau-technology.com/assets/files/spe_technique/G121XGE-L01%20ver%203_0.pdf

WHAT WE ASKED IS HOW TO LIGHT UP / DRIVE THE SELECTED DISPLAY?

USUALLY HERE NEED A TABLE TO CONFIGURE RELATIVE PARAMETERS IN ACCORDANCE WITH TFT DISPLAY'S SPECIFICATION.

IT'S NOT CONTROLLED BY LCD PANEL. IT'S CONTROL BY BACKLIGHT DRIVER TO DECIDE IN VOLTAGE LEVEL OR ADJUSTED IN PROCESSOR.

FOR TDA3 CASE BUILT-IN M4 IS INTENDED FOR DISPLAY CONTROL.

0 Bright Wang over 5 years ago in reply to Bright Wang

Prodigy 220 points

HELLO

JUST CONFIRM CAN WE USE DISPLAY SUBSYSTEM FOR HORIZONTAL / VERTICAL 90 DEGREE SHIFT? THIS QUESTION IS ALSO POSTED IN FOLLOWING THREAD BUT NO BODY ANSWERED. https://e2e.ti.com/support/processors/f/791/t/789317

WE CURRENTLY DESIGN DISPLAY UNIT WITH 12.1 INCH DISPLAY. THIS DISPLAY IS LANDSCAPE 1024*768 COMPLIANT WITH PORTRAIT (VERTICAL). IT MEANS WE NEED SOC SUPPORT REQUIRED CONVERSION BY DISPLAY SUBSYSTEM OR MAPPING IN MEMORY (DDR). THIS IS VERY IMPORTANT TO US DUE TO OUR DESIGN PURPOSE OF DISPLAY CONTROL.

0 Prasad Konnur over 5 years ago in reply to Bright Wang

TI__Expert 6065 points

Hi,

The TDA3xx doesnot have the A15 and it doesnot have the linux support.
You can use the Vision SDK package which supports TDA3xx with RTOS.
The PDK is the driver package and is part of the Vision SDK package.

Can you tell the use case you are trying to develope.
For the McASP, which audio codec are you using? who is the master?

Regards,
Prasad

0 Bright Wang over 5 years ago in reply to Prasad Konnur

Prodigy 220 points

Hello

Our Use Case Is A Display Controller Designed With TDA3LA / LX (ACCORDING TO PRODUCT PAGE TDA3LA DESIGNED WITHOUT ISS AND ONLY HAS ONE DSP) Which Must Be Capable Of Processing 2 - 4 CH 1080P Input Video At 60 FPS Frame Rate And Controlling Display For Wanted Orientation (Landscape To Portrait). That Why I Began My Post From The Question About Using DSS (Display Subsystem) Frame Buffer For Mentioned Conversion (90 Degree Rotation). Once DSS Cannot Directly Support Rotation By 90 Degree By Means Of Configurable Size Of Frame Buffer In DDR. Can We Use VIP (Video Port Frame Buffer) / ISS To Do That?

Our Most Wanted Use Case Are Listed Below

1. Select Any Of 2 CH Video Input From VIP / MIPI CSI-2

2. Overlay The 2 Video Stream Into One

3. Rotate Video Frames By 90 Degree

4. Memcopy To DSS Frame Buffer

5. OSD Overlay

6. Output

In Video Port We May Use

FPD-LINK Deserializer / HDMI RX / SD-TV RX / HD-TVI RX

Connect To VIP / MIPI-CSI2

Each Time Our System Requires 2 - 4 CH Video Input In The Meantime With 1080P Resolution @60FPS. The 2 CH Video Stream Must Be Overlaid Together (Video Over Video / PIP) Then Be Converted Into 90 Degree From The Original For Portrait Compliant Display. My Question Is

1. Is That Possible For My Use Case With Required Frame Rate / Resolution

2. Does It Perform Well In Target Frame Rate / Resolution

3. If I Need Video Overlay / PIP / OSD Processing The Frame Buffer Size And DMA Should Be The Factor Which May Limit Performance Due To Data Rate. So My Question Is Can I Set The Size Of Frame Buffer? Video Pipeline Supportability? Is DMA Independent With Enough Channels For Fast-To-Memory?

FUNCTION

MANDATORY FUNCTION	POSSIBLE HARDWARE SUPPORTABILITY	POSSIBLE PROCESS
VIDEO OVERLAY (2 VIDEO)	ISS	DDR ON-THE-FLY (IN FRAME BUFFER)
VIDEO OVERLAY (2 VIDEO)	DSS	DDR ON-THE-FLY (IN FRAME BUFFER)
IMAGE OVERLAY (GRAPHIC / VIDEO)	DSS	DDR ON-THE-FLY (IN FRAME BUFFER)
ROTATION (90 DEGREE)	ISS / EVE	DDR ON-THE-FLY (IN FRAME BUFFER)
RESIZE / SCALER	DSS	DDR ON-THE-FLY (IN FRAME BUFFER)
DISPLAY DRIVE	DSS	DISPLAY CONTROLLER

DEVICE LIST

EACH DEVICE REQUIRE LOAD TABLE AND INITIATION (I2C)

VIDEO DEVICE	INPUT	INTERFACE
DUAL PORT FPD-LINK	TTL 24BIT / YUV422	MIPI-CSI2
1X HDMI RECEIVER	TTL 24BIT / YUV422	MIPI-CSI2 / LVDS
4X HD-TVI RECEIVER	TTL 24BIT / YUV422	MIPI-CSI2
4X S-VIDEO RECEIVER	TTL 24BIT / YUV422	MIPI-CSI2

HERE IS MY ANOTHER POST FOR SAME QUESTION

https://e2e.ti.com/support/processors/f/791/p/789317/2932161?tisearch=e2e-sitesearch&keymatch=%252520user%25253A219093#2932161

YOU CAN SEE BLOCK DIAGRAM IN THE POST.

0 Piyali Goswami over 5 years ago in reply to Bright Wang

TI__Mastermind 30245 points

Hi Bright

I believe the flow for you would be as below:

ISS Capture (4 Ch 1080p capture RGB) --> Select 2 channels --> Resize 2 channels (60 FPS - assume 1/2 resizing) --> Overlay 2 channels --> Buffer rotate with EDMA --> Display with DSS

To answer your original question regarding what software you can use to do this. You can download the Processor SDK Vision which supports TDA3x and also have examples for ISS capture and display and being able to select channels and resize them. You would need to create a custom link on top of Processor SDK vision to rotate the image by 90 deg as this is something that is not supported by any hardware block in TDA3x.

The SDK can be downloaded from http://software-dl.ti.com/processor-sdk-vision/esd/TDAx/vision-sdk/latest/index_FDS.html
1-1-1. SYSTEM BRING UP USING TI RTOS - This package contains the TI-RTOS support to bring up the system
2. WHERE IS THE MENTIONED PDK DRIVERS? - This package contains the PDK drivers.
1-1-2. DDR CALIBRATION TOOL - http://www.ti.com/lit/an/sprac36e/sprac36e.pdf - This mentions TDA2x but this also supports TDA3x family of devices.
1-1-3. PIN MUX TOOL : The pin mux tool can be accessed from http://www.ti.com/tool/PINMUXTOOL
2-1. CAN WE USE BUILT-IN DSP AS AUDIO DECODER? (WMA / MP3 / MP4) / OR THE DSP IS DESIGNED PURPOSED ON AUDIO ROUTING / SWITCH ONLY?
The DSP can be used as an audio decoder as well. You would need to have software libraries which support the decoding operation. https://processors.wiki.ti.com/index.php/Software_libraries#Codecs
3. ABOUT DISPLAY:
You would need to drive the input of the LCD from the DSS and the M4 would be responsible to program the clocking for the DSS corresponding to the timing requirements for this LCD.

CAN WE USE DISPLAY SUBSYSTEM FOR HORIZONTAL / VERTICAL 90 DEGREE SHIFT?
No DSS does not support 90 deg shift. This needs to be done using EDMA.

The system performance is sufficient for your usecase in terms of DDR performance. Where you would struggle in the current flow is ISS hardware base resizing of 2 channels of 1080p. If you can resize only one channel then you should be able to fit it in the ISS hardware.

Also note the ISS resizer works with input of YUV422 images. So if you are inputting RGB565 you would need an additional color space conversion from RGB565 to YUV422 to use the ISS resizer.

Stage	H	W	FPS	Num Bytes per pixel	Number of Channels	DDR Bandwidth	Available on TDA3x	Remarks
CSI output (YUV422)	1920	1080	60	2	4	949.21875
Resize Input	1920	1080	60	2	2	474.609375
Resize Output	960	540	60	2	2	118.6523438
Rotation 90 deg Input	1920	1080	60	2	1	237.3046875
Rotation 90 deg Output	1920	1080	60	2	1	237.3046875
Display Input	1920	1080	60	2	1	237.3046875
Total DDR bandwidth						2254.394531	4256	Required is less than 60% of ideal DDR throughput
Stage	H	W	FPS	Num Bytes per pixel	Number of Channels	IP MHz
Resizer Mpix/s	1920	1080	60	NA	2	248.832	212.8 MHz	This is more than what the ISS Resizer can support. Can you run the resize pipe at 30 FPS and have the display refresh at 60 FPS instead?

Thanks and Regards
Piyali

0 Bright Wang over 5 years ago in reply to Piyali Goswami

Prodigy 220 points

PIYALI

KINDLY THANK YOU FOR YOUR FAVOR TO ANSWER MY QUESTIONS.

IT REALLY HELPS.

NOW MY FINAL QUESTIONS ARE ABOUT DMA AND BANDWIDTH.

ABOUT COLOVER CONVERSION

IN MIPI-CSI2 RX INTERFACE AND RX CONTROLLLER

1. SO ISS HARDWARE DOESN'T SUPPORT CONVERSION ACCELERATION BY SOME REGISTER SETTING?

1-1. I GUESS HERE IS NO PROBLEM BECAUSE

YOUR POWERFUL FPD-LINK DESERIALIZER CAN RESOLVE FORMATTING PROBLEM.

FOR EXAMPLE WE USE

1-1-1. DS90UB940-Q1 IT SUPPORT LVDS RGB TO YUV OUT FOR MIPI-CSI2 TX TO TDA3 MIPI-CSI2 RX

1-1-2. FOR HDMI RX TO MIPI-CSI2 ADV7481 IS APPLIED IN OUR DESIGN TO INTERFACE WITH MIPI-CSI2 RX OF TDA3. IT DOES SUPPORT FOR RESOLVING THE SAME FORMATTING PROBLEM:

1-1-3. FOR HD-TVI RX WE USE TECHPOINT TP2854 WITH DEFAULT SUPPORT FOR YUV FORMAT

1-1-4. FOR SD-TV ADV7282A IS ADOPTED.

SO I BELIEVE COLOR CONVERSION IS NOT NECESSARY.

2. ABOUT ROTATION AND OVERLAY FEATURES AS YOU DESCRIBED ABOVE. MY PROBLEMS FOR THESE TWO FEATURES ARE:

2-1. IS HERE A FRAME BUFFER SETUP FOR DSS?

2-2. IS THAT FRAME BUFFER SIZE CONFIGURABLE?

2-3. ARE THE TWO FUNTIONS POSSIBLE TO BE DONE ON THE FLY IN DDS FRAME BUFFER?

2-4. HERE IS OSD OVERLAY SUPPORTED BY DSS SO I GUESS OVERLAYING 2 VIDEO STREAMS IN DSS PHASE WITH ITS FRAME BUFFER SHOULD BE BETTER THAN DOING THAT IN ISS.

(ROTATION REQUIRED 90 DEGREE NOT FLIP IN 180 DEGREE)

I KNOW THAT YOU HAVE ANSWER THAT SHOULD BE DONE IS DSS BUT I WONDER FOR OVERLAY.

3. FOR RATION / OVERLAY CAN YOU DO ME A FAVOR TO POINT OUT WHERE SHOULD I MODIFY IN VISIONSDK?

3-1. WHERE CAN WE SET UP FRAME BUFFER SIZE IN VISIONSDK / RTOS FILE IF POSSIBLE?

3-2. ALSO CAN THAT FRAME BUFFER TO BE ALLOCATED IN SPECIFIC ADDRESSES?

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TDA3LX: McASP / DISPLAY DRIVE