DM8148 boot logo output on HDMI in 720p resolution

Marat Shchuchinsky

Hello TI' teams,

I'm working with DM8148 silicon revision 3 and latest version of dvr-rdk - 4.

I'm use bitmap image with properties 640x480@24bpp as boot logo. This works fine on HDMI and SD output with u-boot supplied by TI: I can see proper image on HDMI and analog monitotrs.

But my final configuration require use instead of HDMI monitor - OLED connected to HDMI. Unfortunatelly this OLED doesn't support standard VGA mode 640x480@60p. Supported only resolutions SXGA@60p and 720p. I'm modify uboot for set appropriate video mode/timing(720p) for boot logo (files "cmd_logo_814x.c" and "logo_814x.h":

....

ti810x_pll_config_hdmi(74250000);
ti810x_hdmi_enable(74250000);

....

ti810x_vps_configure_venc(0x6000, 1280, 1720, 1760, 1980, 720, 725, 730, 750, 0, 1, 1,cmd);

....

#define WIDTH 1280
#define HEIGHT 720

.....

Boot logo still displayed on OLED, but image isn't stretched on full area of diplay.

Please help me and confirm:

1) Resolution of bitmap file that used as boot logo, must exactly match video mode in uboot? So if HDVPSS in uboot configured to VGA - bitmap file must be 640x480 pixels, if configured to 720P - bitmap file must be 1280x720 pixels, etc....

2) Is bitmap file may be stratched by HDVPSS scaler into uboot for display on full area?

3) Any idea for display 640x480 bitmap as boot logo, when HDVPSS configured in uboot in mode different from VGA, for example to 720P mode?

Thank you very much.

over 7 years ago

0 Brijesh Jadav over 7 years ago

TI__Guru**** 398480 points

Check also if the pixel clock required for this mode is set correctly in these two files. if i remember correctly, it supported only limited set of pixel clocks.. You will have to add support for it if not supported.

Rgds,
Brijesh

0 Marat Shchuchinsky over 7 years ago in reply to Brijesh Jadav

Expert 2595 points

Hi Brijesh,

very glad for your answer.

You means clock setting in ti810x_pll_get_dividers()?

I think clock configured correctly:

if(hdmi)
{
  config->n = 19;//n;
  config->m = 1485;//m;
  config->m2 =10;//m2;
  config->clk_ctrl = 0x200a1001;
   if(req_out_clk ==74250000 )
   {
    config->n = 19;//n;
    config->m = 742;//m;
    config->m2 =10;//m2;
    config->clk_ctrl = 0x20020801;
   }

...

74,25MHZ - this is pixel clock for 720P CEA standard.

May I ask you again:

2) Is bitmap file may be stratched by HDVPSS scaler into uboot for display on full area?

0 Brijesh Jadav over 7 years ago in reply to Marat Shchuchinsky

TI__Guru**** 398480 points

Yes, the bitmap file and the grpx input settings must match with the display settings.. It uses grpx pipeline and it does not have scalar.
so you need to provide correct input image and need to change grpx settings..

Rgds,
Brijesh

0 Marat Shchuchinsky over 7 years ago in reply to Brijesh Jadav

Expert 2595 points

Hi Brijesh,
thanX again for your reply.
So, am I understood correctly that, fot example, bitmap file match for 720P can't be used for boot logo on SD video output in parallel?

0 Brijesh Jadav over 7 years ago in reply to Marat Shchuchinsky

TI__Guru**** 398480 points

you could still use it for SD by setting up the pitch corrrectly.

Rgds,
Brijesh

0 Marat Shchuchinsky over 7 years ago in reply to Brijesh Jadav

Expert 2595 points

What kind of pitch you mean?
If I have bitmap 1280x720@24bpp, how this file can displayed properly and without crop on SD?

0 Brijesh Jadav over 7 years ago in reply to Marat Shchuchinsky

TI__Guru**** 398480 points

you could always show the top-left corner of the image on SD by playing with the lineoffset/pitch.

Regards,
Brijesh

0 Marat Shchuchinsky over 7 years ago in reply to Brijesh Jadav

Expert 2595 points

In above files I may change only WIDTH and HEIGHT parameters, Pitch isn't present.

0 Brijesh Jadav over 7 years ago in reply to Marat Shchuchinsky

TI__Guru**** 398480 points

pitch is part of the data descriptor, please check where data descriptor is created and update the pitch in data descriptor of SD path.

Rgds,
Brijesh

0 Marat Shchuchinsky over 7 years ago in reply to Brijesh Jadav

Expert 2595 points

are you mean desc_buffer parameter in uint32_t ti810x_dispmgr_create_grpx_conf_descriptor(int grpx_unit, uint32_t* desc_buffer, uint32_t* payload_buffer, uint32_t xres, uint32_t yres)?

0 Brijesh Jadav over 7 years ago in reply to Marat Shchuchinsky

TI__Guru**** 398480 points

there should be some create grpx_data_descriptor function.

Rgds,
Brijesh

0 Brijesh Jadav over 7 years ago in reply to Brijesh Jadav

TI__Guru**** 398480 points

In function, ti810x_dispmgr_setup_layers (_SD), change the value of the stride correctly for the SD path.

Rgds,
BRijesh

0 Marat Shchuchinsky over 7 years ago in reply to Marat Shchuchinsky

Expert 2595 points

Hi Brijesh,

stride simply defined as:

#define STRIDE 3*WIDTH

So, I think, this wiil work correctly

0 Brijesh Jadav over 7 years ago in reply to Marat Shchuchinsky

TI__Guru**** 398480 points

Hopefully, please make sure that this variable is being used for sd path.

Rgds,

Brijesh

0 Marat Shchuchinsky over 7 years ago in reply to Brijesh Jadav

Expert 2595 points

Thanks

0 xiaobo li1 over 7 years ago in reply to Marat Shchuchinsky

Prodigy 180 points

Marat Shchuchinsky，
now I use uboot on DM8148(git:arago-project.org/.../. I use the colorbar command, hdmi output test pattern,But I through the logo on the command display BMP images, always display is black. What did you change on uboot.

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DM8148 boot logo output on HDMI in 720p resolution