DS90UH948-Q1EVM: DS90UB948-Q1: Playing HDMI Audio

Hi Anurag,

Can you clarify your setup? What is the serializer you are using? Are you trying to receive audio on the serializer input and output the audio on the deserializer I2S pins?

Regards,

Ben

Hi Ben,

Here are the details about my setup

Serializer : DS90UB949-Q1 EVM 

Deserializer: DS90UB949-Q1 EVM

Sprakfun I2S breakout board: MAX98357A

I am trying to receive HDMI audio and output audio on deserializer I2S line.

I was able to get audio out on Eval board set up. I have set register 0x0012 to value 02.

However i have another question 

With Eval board setup I can see DS90UB949 as speaker in windows speaker menu. 

But on my in house designed serializer and deserializer  boards I am not able to see DS90UB949 as speaker. 

Do you know from hardware prospective what pins i should look into so that i can detect DS90UB949 as speaker ?

Regards,

Anurag

Hi Anurag,

Is the serializer linked to a downstream DES when you are testing this? The 949 has to detect a downstream DES in order to apply the HDMI input. This can be done by either connecting to a DES or forcing a detected link via Register 0x5C[6].

Regards,

Ben

Hi Ben,

I am observing that every time i read from external EDID file serializer is not detected as speaker. But i am not reading from external EDID file than in that case serializer is detected as speaker.

Regards,

Anurag

Hi Anurag,

You will need to set the EDID on the 949 before the 949 is detected as an audio device. If you are using ALP, you can select the EDID SRAM data as shown below:

Regards,

Ben

Hi Ben,

Please find screenshot from ALP HMI Tab. 

I am still not able to detect 949 as audio source. 

Regards,

Anurag

Hi Anurag,

You need to select the EDID SRAM data that is appropriate for the audio setup you are attempting to achieve. For example, when doing surround sound like you have selected here, "TI 1080p 8ch" is often used.

Regards,

Ben

Hi Ben,

I have tried all options under EDID SRAM data but with no outcome. 

Regards,

Anurag

Hi Anurag,

Can you try this using only the 949, and no connected deserializer? You will need to plug in the device, select "TI 1080p 8ch", then force detect link in register 0x5C[6]. I will also set this up in the lab to confirm the sequence is correct.

Regards,

Ben

Hi Ben,

I can but as I have mentioned earlier that I am able to detect serializer 949 as audio source if i am using internal EDID file. 

It is when i am trying to load external EDID file via I2C EEPROM that time i am not able to detect serializer as Audio source. 

Regards,

Anurag

Hi Anurag,

Oh I see. Where is your EEPROM physically located? Is it on the SER I2C bus, or is it on the DES I2C bus? If you want to implement External Remote EDID, the EEPROM should be located at the DES. If it is local, and connected to the HDMI DDC_SCL/SDA, then the computer should automatically load the EDID file. In the latter case, EDID_SEL should be set to 1.

Regards,

Ben

Hi Ben,

EEPROM is located at DES side.

I tried setting Mode_Sel0 to 5 on eval board but still no change.

EDID_SEL = 1

AUTO_SS = 0 

AUX_IS= 0

Mode_Sel1 is set to 4 

EXT_CTL = 0

COAX = 1

REM_EDID_LOAD = 1

Regards,

Anurag

Hi Anurag,

I was under the impression that you can detect an audio device when using the 949 EVM, but not when using the custom hardware, is this correct? If the EEPROM is located at the DES, EDID_SEL = 0, REM_EDID_LOAD = 1. When using the EVM, this configuration should allow you to detect an audio device. Please confirm this works correctly for you on the EVM. If it works on the EVM but continues to fail on the custom hardware, then we need to confirm the strap modes and HDMI input on the custom hardware.

Regards,

Ben

Hi Ben,

Sorry if I was unclear before.

But I am trying to detect HDMI audio on Eval boards setup.

let me summarize again:

I am testing serializer and desearizler interface to drive 7" LCD to display HDMI output and play HDMI audio. 

I have following eval boards 

DS90UB949-Q1EVM for serializer and DS90UB948-Q1 EVM for deserializer.

External EEPROM is connected to the I2C lines of deserializer eval board to load EDID file.

with Eval boards setup :

I am able to detect serializer as Audio source if i am not reading EDID file via external EEPROM ( my custom hardware works in similar way )

But with external EEPROM connected to deserializer  eval board i am not able to detect serializer as Audio source. 

Please let me know if something is unclear.

Regards,

Anurag

Hi Anurag,

Ah I understand now, thank you for the summary.

I think we should try a couple things here:

• Please make sure you can communicate with the remote 948 via I2C. An easy way to test this is to remotely read register 0x00 of the 948.
• Please make sure the address of the EEPROM is correct and can be read.
• I would like to try this setup with video so that the SER and DES can establish a full lock. Configuring patgen or receiving video from HDMI are options for this. Note that when connected to the DES, the SER should not be configured to force detect a link.

Regards,

Ben

Hi Ben,

I am able to communicate with remote 948 via I2C. 

But still serializer does not appear as Audio source while reading external EDID file.

I am attaching register values for both cases. Let me know if you want me to try some other things.

Regards,

Anurag

Please find attached register data 

[REGISTERS]
Device = ALP Nano 1 - DS90UB949, Connector 1
Comments = "Serializer detected as Audio Source"
Date = 09/23/2022
Time = 09:04:33
Reg = 0,0x0000,0x18
Reg = 0,0x0001,0x00
Reg = 0,0x0003,0xDA
Reg = 0,0x0004,0x80
Reg = 0,0x0005,0x00
Reg = 0,0x0006,0x5C
Reg = 0,0x0007,0x00
Reg = 0,0x0008,0x00
Reg = 0,0x0009,0x00
Reg = 0,0x000A,0x03
Reg = 0,0x000B,0x00
Reg = 0,0x000C,0x07
Reg = 0,0x000D,0x20
Reg = 0,0x000E,0x00
Reg = 0,0x000F,0x00
Reg = 0,0x0010,0x00
Reg = 0,0x0011,0x00
Reg = 0,0x0012,0x00
Reg = 0,0x0013,0xB8
Reg = 0,0x0014,0x00
Reg = 0,0x0015,0x01
Reg = 0,0x0016,0xFE
Reg = 0,0x0017,0x1E
Reg = 0,0x0018,0x7F
Reg = 0,0x0019,0x7F
Reg = 0,0x001A,0x01
Reg = 0,0x001B,0x00
Reg = 0,0x001C,0x00
Reg = 0,0x001D,0x00
Reg = 0,0x001E,0x05
Reg = 0,0x001F,0xF6
Reg = 0,0x0020,0x0B
Reg = 0,0x0021,0x00
Reg = 0,0x0022,0x25
Reg = 0,0x0023,0x00
Reg = 0,0x0024,0x00
Reg = 0,0x0025,0x00
Reg = 0,0x0026,0x00
Reg = 0,0x0027,0x00
Reg = 0,0x0028,0x01
Reg = 0,0x0029,0x20
Reg = 0,0x002A,0x20
Reg = 0,0x002B,0xA0
Reg = 0,0x002C,0x00
Reg = 0,0x0030,0x00
Reg = 0,0x0031,0x00
Reg = 0,0x0032,0x00
Reg = 0,0x0033,0x00
Reg = 0,0x0034,0x00
Reg = 0,0x0035,0x00
Reg = 0,0x0036,0x00
Reg = 0,0x0037,0x00
Reg = 0,0x0038,0x00
Reg = 0,0x0039,0x00
Reg = 0,0x003A,0x00
Reg = 0,0x003B,0x00
Reg = 0,0x003C,0x00
Reg = 0,0x003D,0x00
Reg = 0,0x003E,0x00
Reg = 0,0x003F,0x00
Reg = 0,0x0040,0x14
Reg = 0,0x0041,0x55
Reg = 0,0x0042,0x00
Reg = 0,0x0043,0x00
Reg = 0,0x0044,0x80
Reg = 0,0x0045,0x00
Reg = 0,0x0046,0x00
Reg = 0,0x0047,0x00
Reg = 0,0x0048,0x01
Reg = 0,0x0049,0x68
Reg = 0,0x004A,0x01
Reg = 0,0x004B,0xD0
Reg = 0,0x004C,0x02
Reg = 0,0x004D,0x00
Reg = 0,0x004E,0x00
Reg = 0,0x004F,0x00
Reg = 0,0x0050,0x97
Reg = 0,0x0051,0xA1
Reg = 0,0x0052,0x1E
Reg = 0,0x0053,0x00
Reg = 0,0x0054,0x08
Reg = 0,0x0055,0x0C
Reg = 0,0x0056,0x00
Reg = 0,0x0057,0x00
Reg = 0,0x0058,0x00
Reg = 0,0x0059,0x00
Reg = 0,0x005A,0xDD
Reg = 0,0x005B,0xA0
Reg = 0,0x005C,0x02
Reg = 0,0x005D,0x06
Reg = 0,0x005E,0x44
Reg = 0,0x005F,0x4B
Reg = 0,0x0060,0x22
Reg = 0,0x0061,0x02
Reg = 0,0x0062,0x00
Reg = 0,0x0064,0x10
Reg = 0,0x0065,0x00
Reg = 0,0x0066,0x00
Reg = 0,0x0067,0x00
Reg = 0,0x0068,0x00
Reg = 0,0x0069,0x00
Reg = 0,0x006A,0x00
Reg = 0,0x006B,0x00
Reg = 0,0x006C,0x00
Reg = 0,0x0070,0x00
Reg = 0,0x0071,0x00
Reg = 0,0x0072,0x00
Reg = 0,0x0073,0x00
Reg = 0,0x0074,0x00
Reg = 0,0x0075,0x00
Reg = 0,0x0076,0x00
Reg = 0,0x0077,0x00
Reg = 0,0x0078,0x00
Reg = 0,0x0079,0x00
Reg = 0,0x007A,0x00
Reg = 0,0x007B,0x00
Reg = 0,0x007C,0x00
Reg = 0,0x007D,0x00
Reg = 0,0x0080,0x00
Reg = 0,0x0081,0x00
Reg = 0,0x0082,0x00
Reg = 0,0x0083,0x00
Reg = 0,0x0084,0x00
Reg = 0,0x0090,0x00
Reg = 0,0x0091,0x00
Reg = 0,0x0092,0x00
Reg = 0,0x0093,0x00
Reg = 0,0x0094,0x00
Reg = 0,0x0098,0x00
Reg = 0,0x0099,0x00
Reg = 0,0x009A,0x00
Reg = 0,0x009B,0x00
Reg = 0,0x009C,0x00
Reg = 0,0x009D,0x00
Reg = 0,0x009E,0x00
Reg = 0,0x009F,0x00
Reg = 0,0x00A0,0x00
Reg = 0,0x00A1,0x00
Reg = 0,0x00A2,0x00
Reg = 0,0x00A3,0x00
Reg = 0,0x00C0,0x00
Reg = 0,0x00C1,0x00
Reg = 0,0x00C2,0xA8
Reg = 0,0x00C3,0x00
Reg = 0,0x00C4,0x28
Reg = 0,0x00C5,0x00
Reg = 0,0x00C6,0x00
Reg = 0,0x00C7,0xE0
Reg = 0,0x00C8,0xC0
Reg = 0,0x00C9,0x00
Reg = 0,0x00CA,0x00
Reg = 0,0x00CB,0x00
Reg = 0,0x00CC,0x00
Reg = 0,0x00CE,0xFF
Reg = 0,0x00D0,0x00
Reg = 0,0x00D1,0xA1
Reg = 0,0x00D2,0x00
Reg = 0,0x00D3,0x9B
Reg = 0,0x00E0,0x00
Reg = 0,0x00E1,0x00
Reg = 0,0x00E2,0xA8
Reg = 0,0x00E3,0x00
Reg = 0,0x00E4,0x28
Reg = 0,0x00E5,0x38
Reg = 0,0x00E6,0x00
Reg = 0,0x00E7,0x00
Reg = 0,0x00F0,0x5F
Reg = 0,0x00F1,0x55
Reg = 0,0x00F2,0x42
Reg = 0,0x00F3,0x39
Reg = 0,0x00F4,0x34
Reg = 0,0x00F5,0x39
Reg = 0,0x00F6,0x00
Reg = 0,0x00F8,0x00
Reg = 0,0x00F9,0x00

case 2 :

[REGISTERS]
Device = ALP Nano 1 - DS90UB949, Connector 1
Comments = "Serializer not detected as Audio Source"
Date = 09/23/2022
Time = 09:06:49
Reg = 0,0x0000,0x18
Reg = 0,0x0001,0x00
Reg = 0,0x0003,0xDA
Reg = 0,0x0004,0x80
Reg = 0,0x0005,0x00
Reg = 0,0x0006,0x5C
Reg = 0,0x0007,0xA0
Reg = 0,0x0008,0xB0
Reg = 0,0x0009,0x00
Reg = 0,0x000A,0x0E
Reg = 0,0x000B,0x00
Reg = 0,0x000C,0x07
Reg = 0,0x000D,0x20
Reg = 0,0x000E,0x00
Reg = 0,0x000F,0x00
Reg = 0,0x0010,0x00
Reg = 0,0x0011,0x00
Reg = 0,0x0012,0x00
Reg = 0,0x0013,0xB8
Reg = 0,0x0014,0x00
Reg = 0,0x0015,0x01
Reg = 0,0x0016,0xFE
Reg = 0,0x0017,0x1E
Reg = 0,0x0018,0x7F
Reg = 0,0x0019,0x7F
Reg = 0,0x001A,0x01
Reg = 0,0x001B,0x00
Reg = 0,0x001C,0x00
Reg = 0,0x001D,0x00
Reg = 0,0x001E,0x05
Reg = 0,0x001F,0xF6
Reg = 0,0x0020,0x0B
Reg = 0,0x0021,0x00
Reg = 0,0x0022,0x25
Reg = 0,0x0023,0x00
Reg = 0,0x0024,0x00
Reg = 0,0x0025,0x00
Reg = 0,0x0026,0x00
Reg = 0,0x0027,0x00
Reg = 0,0x0028,0x01
Reg = 0,0x0029,0x20
Reg = 0,0x002A,0x20
Reg = 0,0x002B,0xA0
Reg = 0,0x002C,0x00
Reg = 0,0x0030,0x00
Reg = 0,0x0031,0x00
Reg = 0,0x0032,0x00
Reg = 0,0x0033,0x00
Reg = 0,0x0034,0x00
Reg = 0,0x0035,0x00
Reg = 0,0x0036,0x00
Reg = 0,0x0037,0x00
Reg = 0,0x0038,0x00
Reg = 0,0x0039,0x00
Reg = 0,0x003A,0x00
Reg = 0,0x003B,0x00
Reg = 0,0x003C,0x00
Reg = 0,0x003D,0x00
Reg = 0,0x003E,0x00
Reg = 0,0x003F,0x00
Reg = 0,0x0040,0x14
Reg = 0,0x0041,0x55
Reg = 0,0x0042,0x00
Reg = 0,0x0043,0x00
Reg = 0,0x0044,0x80
Reg = 0,0x0045,0x00
Reg = 0,0x0046,0x00
Reg = 0,0x0047,0x00
Reg = 0,0x0048,0x00
Reg = 0,0x0049,0x00
Reg = 0,0x004A,0x00
Reg = 0,0x004B,0x00
Reg = 0,0x004C,0x00
Reg = 0,0x004D,0x00
Reg = 0,0x004E,0x00
Reg = 0,0x004F,0x00
Reg = 0,0x0050,0x9E
Reg = 0,0x0051,0xA1
Reg = 0,0x0052,0x1E
Reg = 0,0x0053,0x00
Reg = 0,0x0054,0x08
Reg = 0,0x0055,0x0C
Reg = 0,0x0056,0x15
Reg = 0,0x0057,0x00
Reg = 0,0x0058,0x00
Reg = 0,0x0059,0x00
Reg = 0,0x005A,0xDD
Reg = 0,0x005B,0xA0
Reg = 0,0x005C,0x02
Reg = 0,0x005D,0x06
Reg = 0,0x005E,0x44
Reg = 0,0x005F,0x4C
Reg = 0,0x0060,0x22
Reg = 0,0x0061,0x02
Reg = 0,0x0062,0x00
Reg = 0,0x0064,0x10
Reg = 0,0x0065,0x00
Reg = 0,0x0066,0x00
Reg = 0,0x0067,0x00
Reg = 0,0x0068,0x00
Reg = 0,0x0069,0x00
Reg = 0,0x006A,0x00
Reg = 0,0x006B,0x00
Reg = 0,0x006C,0x00
Reg = 0,0x0070,0x00
Reg = 0,0x0071,0x00
Reg = 0,0x0072,0x00
Reg = 0,0x0073,0x00
Reg = 0,0x0074,0x00
Reg = 0,0x0075,0x00
Reg = 0,0x0076,0x00
Reg = 0,0x0077,0x00
Reg = 0,0x0078,0x00
Reg = 0,0x0079,0x00
Reg = 0,0x007A,0x00
Reg = 0,0x007B,0x00
Reg = 0,0x007C,0x00
Reg = 0,0x007D,0x00
Reg = 0,0x0080,0x00
Reg = 0,0x0081,0x00
Reg = 0,0x0082,0x00
Reg = 0,0x0083,0x00
Reg = 0,0x0084,0x00
Reg = 0,0x0090,0x00
Reg = 0,0x0091,0x00
Reg = 0,0x0092,0x00
Reg = 0,0x0093,0x00
Reg = 0,0x0094,0x00
Reg = 0,0x0098,0x00
Reg = 0,0x0099,0x00
Reg = 0,0x009A,0x00
Reg = 0,0x009B,0x00
Reg = 0,0x009C,0x00
Reg = 0,0x009D,0x00
Reg = 0,0x009E,0x00
Reg = 0,0x009F,0x00
Reg = 0,0x00A0,0x00
Reg = 0,0x00A1,0x00
Reg = 0,0x00A2,0x00
Reg = 0,0x00A3,0x00
Reg = 0,0x00C0,0x00
Reg = 0,0x00C1,0x00
Reg = 0,0x00C2,0xA8
Reg = 0,0x00C3,0x00
Reg = 0,0x00C4,0x28
Reg = 0,0x00C5,0x00
Reg = 0,0x00C6,0x00
Reg = 0,0x00C7,0xE0
Reg = 0,0x00C8,0xC0
Reg = 0,0x00C9,0x00
Reg = 0,0x00CA,0x00
Reg = 0,0x00CB,0x00
Reg = 0,0x00CC,0x00
Reg = 0,0x00CE,0xFF
Reg = 0,0x00D0,0x02
Reg = 0,0x00D1,0xA1
Reg = 0,0x00D2,0xFF
Reg = 0,0x00D3,0x00
Reg = 0,0x00E0,0x00
Reg = 0,0x00E1,0x00
Reg = 0,0x00E2,0xA8
Reg = 0,0x00E3,0x00
Reg = 0,0x00E4,0x28
Reg = 0,0x00E5,0x38
Reg = 0,0x00E6,0x00
Reg = 0,0x00E7,0x00
Reg = 0,0x00F0,0x5F
Reg = 0,0x00F1,0x55
Reg = 0,0x00F2,0x42
Reg = 0,0x00F3,0x39
Reg = 0,0x00F4,0x34
Reg = 0,0x00F5,0x39
Reg = 0,0x00F6,0x00
Reg = 0,0x00F8,0x00
Reg = 0,0x00F9,0x00

Hi Ben,

Please find attached file.

# Script to load EDID using built-in ALP routines

VAEDID = [0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x53,0x0E,0x49,0x09,0x01,0x00,0x00,0x00
,0x1C,0x18,0x01,0x03,0x80,0x34,0x20,0x78,0x0A,0xEC,0x18,0xA3,0x54,0x46,0x98,0x25
,0x0F,0x48,0x4C,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01
,0x01,0x01,0x01,0x01,0x01,0x01,0x4C,0x1D,0x00,0x78,0x50,0x20,0x5D,0x30,0x40,0x33
,0x83,0x0B,0x00,0x20,0x21,0x00,0x00,0x1E,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x00
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFC,0x00,0x54
,0x49,0x2D,0x44,0x53,0x39,0x30,0x55,0x78,0x39,0x34,0x39,0x0A,0x00,0x00,0x00,0x10
,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x71,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
		0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00]


# Write to EDID (start offset, data, length)
board.EDID_Write(0x0, VAEDID, 256)

# Readback EDID
read_edid = board.EDID_Read(0x0, 256)
print "EDID readback:"
print read_edid

Hi Ben,

I was able to resolve my issue.

You were correct the problem was in EDID file. After updating the EDID file i was able to detect serializer as Audio source. 

Now i will try to send data on I2S line of serializer. 

Do you have any inputs ( for example i should set to get correct output). 

I am planning to use following serializer I2S lines on eval board

I2S_DA ( J21.10)

I2S_CLK (J21.12)

I2S_WC (J21.14)

I am not sure what should be mode _sel0 values for I2S interface ?

Regards,

Anurag