How to let vout2 channel output signal

Shawn,

I am not able to see any image attached to the post. Can you repost them?

Do you plan to test this with the kernel? Are you testing on DRA74x or DRA71x ?

The system outputs RGB24 by default. You only need to make sure that

1. SOC Pinmux is setup correctly for VOUT2 lines in u-boot. Please refer to board/ti/dra7xx/mux_data.h for pinmux configuration. Thsi file has arrays specifying pinmux for each DRA7 variant. Please review the array corresponding to the SOC you are using.

2. Please ensure any muxes on the VOUT2 lines are setup correctly.

Once this is done, you can update the device tree to include a display on VOUT2. You can refer to the below link on how to define a virtual lcd for each VOUT.

http://processors.wiki.ti.com/index.php/Processor_SDK_Linux_Automotive_Display_FAQ#Testing_multiple_LCD_displays_on_the_EVM

To get static image, you can run modetest or kmstest which display color bars on screen.

regards,
Venkat

Hi Venkat,

I didn't post any image on it, maybe is the word "scenario" to let you misunderstanding. I only descript out test method through wording.

Yes, we'll test this under kernel, and we need to test on both DRA74X and DRA71X.

I have some questions need to understand

Venkat Mandela said:

Please ensure any muxes on the VOUT2 lines are setup correctly.

The muxes you mean is the internal mux inside the CPU video path, or is our custom board video path?

Venkat Mandela said:

Once this is done, you can update the device tree to include a display on VOUT2. You can refer to the below link on how to define a virtual lcd for each VOUT.

The web page you gave to me also include the way to Setup a fake panel(s) in the device tree, but the link seems already fail to open, can you check for me?

 The web page you gave to me also mention about use HDMI PLL clk as clock source. Which mean i also need to adjust clock source for VOUT2/VOUT3 to enable them, right?

Regards,

Shawn

Shawn,

The muxes you mean is the internal mux inside the CPU video path, or is our custom board video path?

I meant both inside the SOC and on the custom board if you have any.

The web page you gave to me also include the way to Setup a fake panel(s) in the device tree, but the link seems already fail to open, can you check for me?

Here is the correct link. In my last email, I pointed to incorrect section in the FAQ.

http://processors.wiki.ti.com/index.php/Processor_SDK_Linux_Automotive_Display_FAQ#Testing_multiple_LCD_displays_on_the_EVM

The page hosting the patches https://review.omapzoom.org seems to be down at the moment. Please try again after sometime.

The web page you gave to me also mention about use HDMI PLL clk as clock source. Which mean i also need to adjust clock source for VOUT2/VOUT3 to enable them, right?

This is required only if you are using more video outputs compared to available video PLL’s i.e. more than 2 LCD’s ON DRA74 and more than 1 LCD on DRA71.

regards,
Venkat