Does G510 Yocto support the resolution 1080i with HDMI-TX?

Yocto
1

There is a G510 HDMI-TX support request from customer. Does G510 HDMI TX support the resolution 1080i59.94 in Yocto?

3

Hi @Josh_Tang

Could you please share the specific timing parameters for 1080i 59.94?
For example, parameters such as front porch, back porch, and others.

Thank you.

4

We found relevant information in the Yocto SDK “linux-mtk/drivers/gpu/drm/drm_edid.c” ,
which contains the following:

static const struct drm_display_mode edid_cea_modes_1 = {
/ 5 - 1920x1080i@60Hz 16:9 */
{ DRM_MODE(“1920x1080i”, DRM_MODE_TYPE_DRIVER, 74250, 1920, 2008,
2052, 2200, 0, 1080, 1084, 1094, 1125, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC |
DRM_MODE_FLAG_INTERLACE),
.picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },

Can we say that Yocto provides standard 1080i…?
For special specifications, we must add corresponding support timings.

5

Hi @Victor_Lin

Yes, you are correct; there are no blockers for displaying standard 1080i.

You may test Yocto with a 1080i-supported monitor using modetest.

6

Hi @tommyyl.chen ,
After check the interlace_allowed flag, we use modetest and it dump the 1080i at list.
We also try to use modetest -s 34:1920x1080i and it can output test pattern.