SN65DSI86: Dell P2314H can't be lightened

CHEN YAN

Intellectual 1430 points

Part Number: SN65DSI86
Other Parts Discussed in Thread: TEST2

Hi,

My customer meets an issue about SN65DSI186, could you please help me solve this problem? Thanks.

There are two Dell DP， and the timing parameter is the same， but just one can be lightened.

1、Dell SP2318H lightened， EDID，timing and DPCD are：

--------------------------------------------------
Dump Panel EDID
------------------------------------------------------
    00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
------------------------------------------------------
00| 00 ff ff ff ff ff ff 00 10 ac fc a0 53 47 41 32
10| 02 1c 01 04 a5 33 1d 78 3a eb f5 a6 56 51 9c 26
20| 10 50 54 a5 4b 00 71 4f 81 80 a9 c0 d1 c0 01 01
30| 01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
40| 45 00 fd 1e 11 00 00 1e 00 00 00 ff 00 34 30 44
50| 34 57 38 31 42 32 41 47 53 0a 00 00 00 fc 00 44
60| 45 4c 4c 20 53 50 32 33 31 38 48 0a 00 00 00 fd
70| 00 38 4c 1e 53 11 01 0a 20 20 20 20 20 20 00 c2
------------------------------------------------------
Extract Panel timing from EDID
------------------------------------------------------
Pixel Clock : 148500 KHz
XDOT * YDOT : 1920 * 1080
HPW  * VPW  : 44 * 5
HBP  * VBP  : 148 * 36
HFP  * VFP  : 88 * 4
HSYNC: Positive
VSYNC: Positive
------------------------------------------------------
Dump Panel DPCD Value
------------------------------------------------------
0000h: 11 0a 84 01 01 00 01 00 02 02 06 00 00 00 00 00
0100h: 06 04 00 00 00 00 00 00 01 04 00 00 00 00 00 00
0200h: 01 00 77 11 80 00 00 00 00 00 00 00 00 00 00 00
0210h: ff 7f ff 7f ff 7f ff 7f 10 0a 00 00 00 00 00 00
------------------------------------------------------
DPCD: REV:1.1
MAX_LINK_RATE:2.7Gbps
MAX_LINK_LANE:4
Not support ASSR
Not support Enhance framing
------------------------------------------------------

2、Dell P2314H can not be lightened， EDID，timing and DPCD are：

--------------------------------------------------
Dump Panel EDID
------------------------------------------------------
    00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
------------------------------------------------------
00| 00 ff ff ff ff ff ff 00 10 ac 98 40 4c 57 44 42
10| 1f 19 01 04 a5 33 1d 78 3a e5 95 a6 56 52 9d 27
20| 10 50 54 a5 4b 00 71 4f 81 80 a9 c0 d1 c0 01 01
30| 01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
40| 45 00 fd 1e 11 00 00 1e 00 00 00 ff 00 48 4d 4a
50| 31 56 35 38 31 42 44 57 4c 0a 00 00 00 fc 00 44
60| 45 4c 4c 20 50 32 33 31 34 48 0a 20 00 00 00 fd
70| 00 38 4c 1e 53 11 01 0a 20 20 20 20 20 20 00 a8
------------------------------------------------------
Extract Panel timing from EDID
------------------------------------------------------
Pixel Clock : 148500 KHz
XDOT * YDOT : 1920 * 1080
HPW  * VPW  : 44 * 5
HBP  * VBP  : 148 * 36
HFP  * VFP  : 88 * 4
HSYNC: Positive
VSYNC: Positive
------------------------------------------------------
Dump Panel DPCD Value
------------------------------------------------------
0000h: 11 0a 84 01 01 00 01 80 02 00 00 00 00 00 00 00
0100h: 0a 82 00 00 00 00 00 00 00 00 0b 00 00 00 00 00
0200h: 41 00 77 00 01 00 00 00 00 00 00 00 00 00 00 00
0210h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
------------------------------------------------------
DPCD: REV:1.1
MAX_LINK_RATE:2.7Gbps
MAX_LINK_LANE:4
Not support ASSR
Not support Enhance framing
------------------------------------------------------

please see the attached files for more details.

Fullscreen Dell P2314H.txt Download

--------------------------------------------------
Dump Panel EDID 
------------------------------------------------------
    00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
------------------------------------------------------
00| 00 ff ff ff ff ff ff 00 10 ac 98 40 4c 57 44 42
10| 1f 19 01 04 a5 33 1d 78 3a e5 95 a6 56 52 9d 27
20| 10 50 54 a5 4b 00 71 4f 81 80 a9 c0 d1 c0 01 01
30| 01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
40| 45 00 fd 1e 11 00 00 1e 00 00 00 ff 00 48 4d 4a
50| 31 56 35 38 31 42 44 57 4c 0a 00 00 00 fc 00 44
60| 45 4c 4c 20 50 32 33 31 34 48 0a 20 00 00 00 fd
70| 00 38 4c 1e 53 11 01 0a 20 20 20 20 20 20 00 a8
------------------------------------------------------
Extract Panel timing from EDID
------------------------------------------------------
Pixel Clock : 148500 KHz
XDOT * YDOT : 1920 * 1080
HPW  * VPW  : 44 * 5
HBP  * VBP  : 148 * 36
HFP  * VFP  : 88 * 4
HSYNC: Positive
VSYNC: Positive
------------------------------------------------------
Dump Panel DPCD Value
------------------------------------------------------
0000h: 11 0a 84 01 01 00 01 80 02 00 00 00 00 00 00 00
0100h: 0a 82 00 00 00 00 00 00 00 00 0b 00 00 00 00 00
0200h: 41 00 77 00 01 00 00 00 00 00 00 00 00 00 00 00
0210h: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
------------------------------------------------------
DPCD: REV:1.1
MAX_LINK_RATE:2.7Gbps
MAX_LINK_LANE:4
Not support ASSR
Not support Enhance framing
------------------------------------------------------

Fullscreen Dell SP2318H.txt Download

--------------------------------------------------
Dump Panel EDID 
------------------------------------------------------
    00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
------------------------------------------------------
00| 00 ff ff ff ff ff ff 00 10 ac fc a0 53 47 41 32
10| 02 1c 01 04 a5 33 1d 78 3a eb f5 a6 56 51 9c 26
20| 10 50 54 a5 4b 00 71 4f 81 80 a9 c0 d1 c0 01 01
30| 01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
40| 45 00 fd 1e 11 00 00 1e 00 00 00 ff 00 34 30 44
50| 34 57 38 31 42 32 41 47 53 0a 00 00 00 fc 00 44
60| 45 4c 4c 20 53 50 32 33 31 38 48 0a 00 00 00 fd
70| 00 38 4c 1e 53 11 01 0a 20 20 20 20 20 20 00 c2
------------------------------------------------------
Extract Panel timing from EDID
------------------------------------------------------
Pixel Clock : 148500 KHz
XDOT * YDOT : 1920 * 1080
HPW  * VPW  : 44 * 5
HBP  * VBP  : 148 * 36
HFP  * VFP  : 88 * 4
HSYNC: Positive
VSYNC: Positive
------------------------------------------------------
Dump Panel DPCD Value
------------------------------------------------------
0000h: 11 0a 84 01 01 00 01 00 02 02 06 00 00 00 00 00
0100h: 06 04 00 00 00 00 00 00 01 04 00 00 00 00 00 00
0200h: 01 00 77 11 80 00 00 00 00 00 00 00 00 00 00 00
0210h: ff 7f ff 7f ff 7f ff 7f 10 0a 00 00 00 00 00 00
------------------------------------------------------
DPCD: REV:1.1
MAX_LINK_RATE:2.7Gbps
MAX_LINK_LANE:4
Not support ASSR
Not support Enhance framing
------------------------------------------------------

Fullscreen SN65DSI86_Init.c Download

void SN65DSI86_Init(void)
{
    u8 buf[2];
    MIPI2DP_RST_L;
    Delay_ms(20);
    MIPI2DP_RST_H;
    Delay_ms(20);
    MIPI2DP_Write(0x09, 1, 0x01);
    Delay_ms(20);
    MIPI2DP_Write(0x09, 1, 0x00);
    Delay_ms(20);
    if(isDual)
    {
        MIPI2DP_Write(0x0A, 1, 0x06);           //REFCLK 27MHz
        MIPI2DP_Write(0x10, 1, 0x80);           //Dual(Left & Right) 4 DSI lanes
        MIPI2DP_Write(0x12, 1, 0x32);           //DSIA CLK FREQ 222MHz
        MIPI2DP_Write(0x13, 1, 0x32);           //DSIB CLK FREQ 222MHz
        MIPI2DP_Write(0x94, 1, 0x80);           //HBR (2.7Gbps)
        MIPI2DP_Write(0x0D, 1, 0x01);           //PLL DISENABLE
        Delay_ms(10);
        MIPI2DP_Write(0x5A, 1, 0x05);
        MIPI2DP_Write(0x93, 1, 0x24);           //2 DP lanes no SSC
        MIPI2DP_Write(0x95, 1, 0x00);           //POST-Cursor2 0dB
        MIPI2DP_Write(0x96, 1, 0x0A);           //Semi-Auto TRAIN
        DP_Read();
        buf[0] = (edp.xdot>>1) & 0xFF;
        buf[1] = (edp.xdot>>9) & 0xFF;
        MIPI2DP_Writes(0x20, 2, buf);           //CHA_ACTIVE_LINE_LENGTH
        MIPI2DP_Writes(0x22, 2, buf);           //CHB_ACTIVE_LINE_LENGTH
    }
    else
    {
        MIPI2DP_Write(0x0A, 1, 0x06);           //REFCLK 27MHz
        MIPI2DP_Write(0x10, 1, 0x26);           //Single 4 DSI lanes
        MIPI2DP_Write(0x12, 1, 0x59);           //DSIA CLK FREQ 445MHz
        MIPI2DP_Write(0x13, 1, 0x59);           //DSIB CLK FREQ 445MHz
        MIPI2DP_Write(0x94, 1, 0x80);           //HBR (2.7Gbps)
        MIPI2DP_Write(0x0D, 1, 0x01);           //PLL DISENABLE
        Delay_ms(10);
        MIPI2DP_Write(0x5A, 1, 0x05);
        MIPI2DP_Write(0x93, 1, 0x24);           //2 DP lanes no SSC
        MIPI2DP_Write(0x95, 1, 0x00);           //POST-Cursor2 0dB
        MIPI2DP_Write(0x96, 1, 0x0A);           //Semi-Auto TRAIN
        DP_Read();
        buf[0] = edp.xdot & 0xFF;
        buf[1] = (edp.xdot>>8) & 0xFF;
        MIPI2DP_Writes(0x20, 2, buf);           //CHA_ACTIVE_LINE_LENGTH
        MIPI2DP_Write(0x22, 2, 0x00, 0x00);     //CHB_ACTIVE_LINE_LENGTH
    }
    buf[0] = edp.ydot & 0xFF;
    buf[1] = (edp.ydot>>8) & 0xFF;
    MIPI2DP_Writes(0x24, 2, buf);               //CHA_VERTICAL_DISPLAY_SIZE

    buf[0] = edp.hsync & 0xFF;
    buf[1] = (edp.hsync>>8) & 0x7F;
    if(edp.h_pos) buf[1] &= 0x80;
    MIPI2DP_Writes(0x2C, 2, buf);               //CHA_HSYNC_PULSE_WIDTH
    
    buf[0] = edp.vsync & 0xFF;
    buf[1] = (edp.vsync>>8) & 0x7F;
    if(edp.v_pos) buf[1] &= 0x80;
    MIPI2DP_Writes(0x30, 2, buf);               //CHA_VSYNC_PULSE_WIDTH
    MIPI2DP_Write(0x34, 1, edp.hbp);            //CHA_HORIZONTAL_BACK_PORCH
    MIPI2DP_Write(0x36, 1, edp.vbp);            //CHA_VERTICAL_BACK_PORCH
    MIPI2DP_Write(0x38, 1, edp.hfp);            //CHA_HORIZONTAL_FRONT_PORCH
    MIPI2DP_Write(0x3A, 1, edp.vfp);            //CHA_VERTICAL_FRONT_PORCH
    MIPI2DP_Write(0x5B, 1, 0x00);               //DP 24bpp
    MIPI2DP_Write(0x5C, 1, 0x00);               //HPD DISENABLE
    MIPI2DP_Write(0x3C, 1, 0x00);               //COLOR BAR disabled
    DPCD_Write(0x00100, 1, 0x0A);
    Delay_ms(20);
    MIPI2DP_Write(0x5A, 1, 0x0D);               //Enhanced Framing, ASSR, Vstream
    Delay_ms(10);
    EDID_Read();
    EDID_Print();
    Timing_Print();
    DPCD_Print();
    DPCD_Print_Info();
}

Best Regards.

over 6 years ago

0 David (ASIC) Liu over 6 years ago

TI__Guru**** 180041 points

Yan

Have they tried the DSI86 Color Bar test with Dell P2314H monitor? Please use attached spreadsheet to calculate the DSI86 register setting.

PANEL_VIDEOREGISTER_CALC.zip

Thanks

David

0 CHEN YAN over 6 years ago in reply to David (ASIC) Liu

TI__Intellectual 1430 points

David,

Thank you for the reply, but the parameters they have used is produced by the spreadsheet.

Best Regards.

0 David (ASIC) Liu over 6 years ago in reply to CHEN YAN

TI__Guru**** 180041 points

Yan

Have they tried Color Bar? Did Color Bar work in this case?

Thanks
David

0 CHEN YAN over 6 years ago in reply to David (ASIC) Liu

TI__Intellectual 1430 points

David,

Color Bar doesn't work in this case.

Thanks.

0 David (ASIC) Liu over 6 years ago in reply to CHEN YAN

TI__Guru**** 180041 points

Yan

Since the monitor does not support ASSR, have they disabled ASSR in their configuration?

Please make sure TEST2 pin is high, and then

======ASSR RW control ======
<i2c_write addr=0x2D count=1 radix=16> FF 7 </i2c_write>/>
<i2c_write addr=0x2D count=1 radix=16> 16 1 </i2c_write>/>
<i2c_write addr=0x2D count=1 radix=16> FF 0 </i2c_write>/>

If color bar still does not work, please dump out the entire DSI86 register.

Thanks
David

0 CHEN YAN over 6 years ago in reply to David (ASIC) Liu

TI__Intellectual 1430 points

David,

Thanks for your suggestion, customer has tried the solution, and still can't lighten P2314H.

Best Regards.

0 David (ASIC) Liu over 6 years ago in reply to CHEN YAN

TI__Guru**** 180041 points

Yan

Please dump out the entire DSI86 register, would you please also send me their schematic?

Thanks
David

0 CHEN YAN over 6 years ago in reply to David (ASIC) Liu

TI__Intellectual 1430 points

David

FYI.

MAIN _ 02-MIPI.pdf

Fullscreen Dell P2314H for DSI86.txt Download

------------------------------------------------------
Dump DSI86 Register 
------------------------------------------------------
    00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
------------------------------------------------------
00| 36 38 49 53 44 20 20 20 02 00 86 00 00 01 00 00
10| 26 00 59 59 00 00 00 00 00 00 00 00 00 00 00 00
20| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40| 00 00 00 00 80 00 00 00 00 00 00 00 00 00 00 00
50| 00 00 00 00 00 00 20 00 40 E4 0D 00 00 00 30 00
60| A0 60 A4 00 01 00 00 00 00 00 00 00 00 00 00 00
70| 00 00 00 00 00 01 0A 01 80 00 00 00 00 00 00 00
80| 00 00 00 00 00 00 00 00 00 1F 7C F0 C1 07 1F 7C
90| F0 C1 07 24 80 00 00 04 01 00 00 00 00 00 00 00
A0| 01 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00
B0| 04 78 AC AC 08 6C 9C 9C 0C 5C 5C 5C 0C 0C 0C 0C
C0| 3F 3F 0F 00 00 00 00 00 00 00 00 00 00 00 00 00
D0| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0| 00 03 00 00 41 00 40 00 02 00 00 00 00 00 00 00
------------------------------------------------------

Fullscreen Dell SP2318H for DSI86.txt Download

------------------------------------------------------
Dump DSI86 Register 
------------------------------------------------------
    00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
------------------------------------------------------
00| 36 38 49 53 44 20 20 20 02 00 86 00 00 01 00 00
10| 26 00 59 59 00 00 00 00 00 00 00 00 00 00 00 00
20| 80 07 00 00 38 04 00 00 00 00 00 00 2C 00 00 00
30| 05 00 00 00 94 00 24 00 58 00 04 00 00 00 00 00
40| 6D 41 00 00 80 00 98 08 65 04 C0 00 29 00 2C 00
50| 05 00 80 07 38 04 20 00 40 E4 0D 00 10 00 30 00
60| A0 60 A4 00 01 00 00 00 00 00 00 00 00 00 00 00
70| 00 00 00 00 00 01 0A 01 80 00 1E 80 18 71 38 2D
80| 40 58 2C 45 00 FD 1E 11 00 1F 7C F0 C1 07 1F 7C
90| F0 C1 07 24 80 00 01 04 01 00 00 00 00 00 00 00
A0| 01 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00
B0| 04 78 AC AC 08 6C 9C 9C 0C 5C 5C 5C 0C 0C 0C 0C
C0| 3F 3F 0F 00 00 00 00 00 00 00 00 00 00 00 00 00
D0| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0| 00 03 00 00 01 02 02 00 01 00 00 00 00 00 00 00
------------------------------------------------------

Best Regards

0 David (ASIC) Liu over 6 years ago in reply to CHEN YAN

TI__Guru**** 180041 points

Yan

TEST2 goes to a test point, do they have TEST2 pulled high when disabling the ASSR?

Do they have the 100k pullup/pulldown on AUXP/AUXN?

Thanks
David

0 CHEN YAN over 6 years ago in reply to David (ASIC) Liu

TI__Intellectual 1430 points

Hi, David,

Customer tried pullup on TEST2, and AUX can communicate normally, but the panel also can't be lighten.

Best Regards.

0 David (ASIC) Liu over 6 years ago in reply to CHEN YAN

TI__Guru**** 180041 points

Yan

Please try this script and dump out the register. How do they know the AUX is working properly?

Script_NoASSR.zip

Thanks

David

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SN65DSI86: Dell P2314H can't be lightened