VBIOS and Driver Configuration

The Intel Embedded Graphics Suite allows user configuration of both the VBIOS and graphics driver as well as programming of Detailed Timing Descriptors (DTDs) for EDID-less panels for both the VBIOS and graphics driver. This is accomplished using CED, which offers several ways to input DTDs, each associated with a potential target panel and display mode for the system. CED generates DTD and configuration settings used by the Intel^® EMGD VBIOS, Linux, and/or Windows drivers.

The following example is for a system setup with just an internal LVDS and sample timing parameters for illustration purposes only. You can use this example to set up DTD timings that are specific to your non-standard panels and then activate the panels using a custom mode.

To create a configuration and configure the LVDS options:

1. Create a custom DTD as described in Creating a New Customized DTD.

2. From the CED main screen, select New Configuration.

3. Enter a name for the configuration in the text box provided, for example, LVDS_test.

4. Select the platform chipset.

5. In the list of available ports, select LVDS and then click Next.

6. On the LVDS Configuration Page, clear the checkbox for Use EDID Display if available, which disables all the selections under If EDID Device (edid_avail). The screen will be similar to the example below.

7. Select the checkbox for Use user-defined DTDs.

8. In the Encoder Configuration section, select Internal LVDS.

9. In the Custom Display Timing Descriptors (DTDs) list, select the DTD you created in Creating a New Customized DTD for example, test_LVDS.

LVDS Configuration Page

10. Click Next.

11. (Optional) Configure Fastboot options as described in Configuring Fastboot.

12. Click Next.

To set the custom mode:

1. From the Intel^® EMGD CED screen (similar to the example below), in the Primary Display Mode section, clear the Use Default checkbox.

2. In the Primary Non-standard Modes section, select the checkbox for Custom.

3. In the Primary Non-standard Modes section, enter 0x120 in the Default Mode Settings text box. (See a description of the custom modes.)

Intel^® EMGD Configuration Editor Page

Custom Modes

The custom modes begin with 0x120 (0x121 and 0x122 are the same modes in different pixel formats). If there was a second custom mode entered it would begin with 0x123 to 0x125.

From the above DTD 200x200 example, this is what the custom modes represent:

0x121 200x200@16bpp

0x122 200x200@32bpp

And if the second custom mode was a 400x400 panel, its custom modes would be:

0x124 400x400@16bpp

0x125 400x400@32bpp