AM625: OLDI driver or dts example

Hello,

By applying the patches from the link, there's no LVDS display as before. DSS related message are listed below. Please check what's wrong. Thank you very much.

[ 2.184846] tidss 30200000.dss: DSS fclk 0 Hz
[ 2.191848] tidss 30200000.dss: tidss_modeset_init
[ 2.196740] tidss 30200000.dss: Setting up panel for port 0
[ 2.202320] tidss 30200000.dss: no panel/bridge for port 1
[ 2.207844] tidss 30200000.dss: Encoder create done
[ 2.212960] tidss 30200000.dss: tidss_modeset_init done
[ 2.218223] tidss 30200000.dss: tidss_runtime_get
[ 2.222933] tidss 30200000.dss: tidss_pm_runtime_resume
[ 2.228151] tidss 30200000.dss: resume
[ 2.232234] tidss 30200000.dss: OMAP DSS7 rev 0x64040901
[ 2.237542] tidss 30200000.dss: VP RESETDONE 1,1,0
[ 2.242328] tidss 30200000.dss: OLDI RESETDONE 0,0,0
[ 2.247285] tidss 30200000.dss: DISPC IDLE 1
[ 2.251549] tidss 30200000.dss: dispc_k3_plane_init()
[ 2.256599] tidss 30200000.dss: vid: bufsize 2560, buf_threshold 2559/1280, mflag threshold 1706/853 preload 1280
[ 2.266852] tidss 30200000.dss: vidl1: bufsize 2560, buf_threshold 2559/1280, mflag threshold 1706/853 preload 1280
[ 2.277277] tidss 30200000.dss: dispc_vp_init()
[ 2.281816] tidss 30200000.dss: tidss_runtime_put
[ 2.286518] tidss 30200000.dss: tidss_pm_runtime_suspend
[ 2.291823] tidss 30200000.dss: suspend
[ 2.311589] tidss 30200000.dss: tidss_runtime_get
[ 2.331470] tidss 30200000.dss: tidss_pm_runtime_resume
[ 2.336691] tidss 30200000.dss: resume
[ 2.347292] tidss 30200000.dss: OMAP DSS7 rev 0x64040901
[ 2.352601] tidss 30200000.dss: VP RESETDONE 1,1,0
[ 2.357387] tidss 30200000.dss: OLDI RESETDONE 0,0,0
[ 2.362344] tidss 30200000.dss: DISPC IDLE 1
[ 2.366608] tidss 30200000.dss: dispc_k3_plane_init()
[ 2.371656] tidss 30200000.dss: vid: bufsize 2560, buf_threshold 2559/1280, mflag threshold 1706/853 preload 1280
[ 2.381908] tidss 30200000.dss: vidl1: bufsize 2560, buf_threshold 2559/1280, mflag threshold 1706/853 preload 1280
[ 2.392331] tidss 30200000.dss: dispc_vp_init()
[ 2.396863] tidss 30200000.dss: tidss_runtime_put
[ 2.401563] tidss 30200000.dss: tidss_pm_runtime_suspend
[ 2.406867] tidss 30200000.dss: suspend
[ 2.426885] [drm] Initialized tidss 1.0.0 20180215 for 30200000.dss on minor 0

Hi Krunal,

May I know the schedule of releasing am625 OLDI driver?

Best Regards,

Ken

Hi Ken,

As of now, I don't have an exact schedule but feel free to follow the patchwork links I shared. We have LVDS working with AM62x and the developer is working on upstreaming the code.

Regards,
Krunal

Hi Krunal:

THanks for your helping.

If TI has the LVDS working, can TI offer the working patch/driver instead to wait the "patchwork" update?

ps. Steven/Ken are our customers.

BR Rio

Hi Rio,

Yes, please reach out to me internally and I can share the patches. However, please keep in mind, the patches being shared are not finalized because we are still in the upstream review process. 

Regards,
Krunal

Hi Krunal,

Do the OLDI pins have to be configured (PADCONFIG151~PADCONFIG170)? If yes, what's the suggested configuration value?

Regards,

Steven

Hi Steven,

Are you referring to the pin mux information?

Regards,
Krunal

Hi Krunal,

The mux mode should be 0. How to set the other fields in the PADCONFIG register?

In the TRM, the PADCONFIG registers of OLDI pins have the same characteristics as that of digital I/O pins.

Regards,

Steven

Hello Steven,

Please refer to the attached file. Also, keep in mind that the below are experimental patches and upstream process is still in progress. Besides the below patches, you also need to add either of the following option in Uboot to enable OLDI:

1. In Uboot "spl_board_init" function, add the following code to enable OLDI Transmitter "writel(0x0, 0x108700);"
2. Create a uEnv.txt file and add the following contents uenvcmd=if run check_psdk_setup; then echo "Already setup."; else run do_psdk_setup; mw.b ${loadaddr} 0 1; fatwrite mmc 1:1 ${loadaddr} .psdk_setup 1; reset; fi; mw.l 0x00109008 0x68EF3490; mw.l 0x0010900C 0xD172BC5A; mw.l 0x00108700 0x00000000;

Regards,
Krunal

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/oldi_2D00_8.3.5_2D00_v_2D00_09_5F00_02.tar.xz

Thanks Krunal Bhargav34
Just to clarify on which branch/kernel this patches are for? mainline linux, ti-linux and what branch?

Thanks, Dario

Hello,

9e58028f94 (tag: 08.03.00.005) Merged TI feature platform_base into ti-linux-5.10.y

Regards,
Krunal

Hello

Just to confirm I have working LCD now with all this patches on HV070WX2-1E0
Here is shoot of loading screen (sorry for bad quality)

Thanks for help now I can focus on other things (while waiting to be officially released) 

Hi Dario,

We got the result as the below picture after we updating the configure file (DTS and disp c file) for our panel.

It look like color distortion in the picture.

Do you have any idea for this problem or how to make sure to validate the configure parameters (clock/ register/ display driver)? 

Best Regards,

Ken

Hi Ken

1st: can you post exact model of the LCD (so it is easier to get/find more details) or upload datasheet
2nd: I have removed line from patch for port in dts
 

dual-lvds-even-pixels;
dual-lvds-odd-pixels;

So now my port(for port is)

port@0 {
	lcd_in0: endpoint {
		remote-endpoint = <&oldi_out0>;
	};
};

port@1 {
	lcd_in1: endpoint {
		remote-endpoint = <&oldi_out1>;
	};
};

As I'm not using 2 ports for whole display (I'm using only port@0 )
Also data-mapping for my screen works as "vesa-24" or "jeida-24" maybe your is working differently(need to check datasheet)
Please update missing info so maybe I could give more details

Thanks, Dario

hello Krunal

used patch , but could not get lvds up in my case , we are using single channel LVDS, please let us know what modifications to be done 

platform AM625 - bsp_08_03_00_19

-nagendra 

Let's continue the discussion in the following thread: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1133242/processor-sdk-am62x-how-to-enable-lvds-in-the-kernel.

Regards,
Krunal