i.MX6 GPU Test on Android

[david5icp]

Hi All,

We have a new project using i.mx6q with lpddr2 ( single channel mode, 2 chip select, total 1GB). We have some GPU and we do some test with other similar boards, issues summies as below:

1).Board_A (using ddr3, 2GB), Board_B(lpddr2 32bit, 1GB)

===>OS: Android 4.3 ( Same BSP, boot loader is different because ddr type)

2) Board_C (ddr3 1GB)

===> OS: Android 4.2

3). Test tool: GFX Bench GL V4.0.2, Antutu V6.2.1 and StabilityTest V2.7

Result:

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GFX Bench GL, on  Item "Render Quality" and " Render Quality (high precision)"

Board_A (DDR3) Score: 3053

Board_B (LPDDR2) Score: -1

Board_C (DDR3, JB4.2): not supported. Actually, all test items are couldn't to test.

<<< Qusetion 1 >>>

Board_A and Board_B using same BSP, the only different is memory type.

Why score have so big different ?

Does 3D library supports LPDDR2 ?

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Antutu V6.2.1, Item: 3D

Board_A (DDR3) Score:

  3D[Marooned]: unsupported (ok, because it's base on opengl es 3.0)

  3D[Garden] :612

Board_B (LPDDR2) Score:

  3D[Marooned]: unsupported (ok, because it's base on opengl es 3.0)

  3D[Garden] : 475

Board_C (DDR3, JB4.2): 

  3D[Marooned]: unsupported (ok, because it's base on opengl es 3.0)

  3D[Garden] : unsupported  (v5.7.1 pass)

<<< Qusetion 2 >>>

Different Version of 3D library seems have different supported.

Do you have release note or errata of 3D lbrary for Android ?

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StabilityTest V2.7

Board_A (DDR3):

  Classic Stability Test: Pass (more then 24 hours)

  GPU + CPU Stability Test : Pass (more then 8 hours)

Board_B (LPDDR2):

  Classic Stability Test: Pass (more then 24 hours)

  GPU + CPU Stability Test 720p : Fail (crash in 1 minuts, sometimes more then 2 minuts)

  GPU + CPU Stability Test 1080p : Fail (crash in 5 minuts, sometimes more then 10 minuts)

  GPU + CPU Stability Test 1080p : Pass (more then 8 hours if select "Disable HW overlays" )

Board_C (DDR3, JB4.2):

  Classic Stability Test: Pass (more then 24 hours)

  GPU + CPU Stability Test : Pass (more then 8 hours)

<<< Qusetion 3 >>>

Why i need to disable hw overlays ?

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<<< Qusetion 4 >>>

Does any difference of support DDR3 and LPDDR2 in gpu_viv on Android ? Thanks!

BR

David Wu

[michaelguntli]

Regarding stability problems: try to increase VDD_ARM_IN and VDD_SOC_IN: https://community.nxp.com/message/949758?commentID=949758#comment-949758 

[michaelguntli]

Hi david5icp‌

Any feedback on how you were able to stabilize the system? Which settings did you tweak?

It can't be only because of "Disable HW overlays", correct?

[david5icp]

Hi Igor,

How to explain same  bsp but score is -1 when use lpddr2 ?

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GFX Bench GL, on  Item "Render Quality" and " Render Quality (high precision)"

Board_A (DDR3) Score: 3053

Board_B (LPDDR2) Score: -1

 --------------------------------------------------------------------------------------------------------------

Thanks!

BR.

David Wu

[igorpadykov]

Hi David

>Do you have release note or errata of 3D lbrary for Android ?

Usually next linux release contains errata, so for JB4.2&L3.0.35 it
is JB4.3 please refer to attached document.

>Does any difference of support DDR3 and LPDDR2 in gpu_viv on Android ?

No.

>Board_A and Board_B using same BSP, the only different is memory type.
>Why score have so big different ?
>Does 3D library supports LPDDR2 ?
>Same BSP, boot loader is different because ddr type

Default BSP does not support i.MX6Q&lpddr2 and appropriate
integration should be made in mx6_suspend.S for i.MX6Q using
lpddr2. It may be recommended first to run just linux on both boards.

Best regards
igor
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