HDVPSS COMP

Holger Eberhard102906

We use DM8168 and UDWORKS based hardware and DVRRDK 03.00.00.00 based software.

Sometime we want to show temporarily only OSD without any video.

We tested a convenient way to disable/enable video via HDVPSS COMP registers.

(COMP_hdmi_settings 0x48105204, COMP_dvo2_settings 0x48105208, COMP_sd_settings 0x48105210)

For Enable/Disable video we used Bit 5 / VID_EN. This works fine for HDMI and SD but it has no effect for DVO2. HDCOMP/DVO2 video is always enabled. We have tied DVO2 and HDCOMP.

Is it possible to disable/enable the DVO2 video via this way ?

over 9 years ago

0 Reshma Prabhu over 9 years ago

TI__Prodigy 510 points

Hi,

Please try using PIP_EN bit (Bit 3) in COMP_dvo2_settings and COMP_sd_settings to disable/enable video on HDCOMP and DVI.

Regards,

Reshma

0 Holger Eberhard102906 over 9 years ago in reply to Reshma Prabhu

Genius 4570 points

Hi,

Thanks for Your reply.

I have tested Bit 3 in COMP_dvo2 and COMP_sd registers but without success.

I also did read Register 0x48105208. Bit 3 is changed depending on my writing.

Bit 5 never is set to 1, it always contains 0

Bit 1 is set if I enable Grpx 1.

All other bits are 0.

Best regards

Holger

0 Badri Narayanan over 9 years ago in reply to Holger Eberhard102906

TI__Guru 59700 points

Can you confirm you are changing COMP_dvo2 and COMP_hdcomp ? We have confirmed disabling PIP_EN switches off the video.Reading COMP_dv02_setting register shows values 0x00010008 by default. PIP_EN is bit 3

0 Holger Eberhard102906 over 9 years ago in reply to Badri Narayanan

Genius 4570 points

I did change bit 3 in COMP_dvo2 and COMP_sd,

I also did changing bit 3 in COMP_dvo2 and COMP_hdmi.

I do not know the COMP_hdcomp register.

0 Badri Narayanan over 9 years ago in reply to Holger Eberhard102906

TI__Guru 59700 points

COMP_hdmi_settings is 0x48105204,

COMP_hdcomp_settings is 0x48105208,

COMP_dvo2_settings 0x4810520C,

COMP_sd_settings 0x48105210

If you are changing 0x48105208 you are modifying HDCOMP settings. Unless you have the HDCOMP output connected to display you will not see effect of disabling video.

0 Holger Eberhard102906 over 9 years ago in reply to Badri Narayanan

Genius 4570 points

Thank You for telling me the proper registers.

If I use these registers it works fine also for HDCOMP, DVO2.

It seems that I have used DM8148 registers ?

Best regards

Holger

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HDVPSS COMP