Dear TI,
My LVDS Screen connected to the OLDI Pins is fading to black slowly after bootup. I can see the Penguins on bootup. They are the wrong color, but I am working on that. However, a few seconds later the Penguins will disappear and there is nothing displayed on the screen. I double-checked the backlight brightness and it at full output. I have also tried to display some of the weston-examples as well as a Qt Application but nothing shows up on the display. I haven't scoped out the OLDI Signals yet because I wanted to post here to see if you guys had any ideas for me to try out.
Our LVDS is the DisplayTech DT080BTFT
Here is the relevant section for panel-simple.c that contains the timing for the panel.
static const struct display_timing displaytech_dt070btft_timing = {
.pixelclock = { 45000000, 51200000, 57000000 },
.hactive = { 1024, 1024, 1024 },
.hfront_porch = { 160, 160, 160 },
.hback_porch = { 160, 160, 160 },
.hsync_len = { 20, 20, 20 },
.vactive = { 600, 600, 600 },
.vfront_porch = { 12, 12, 12 },
.vback_porch = { 23, 23, 23 },
.vsync_len = { 3, 3, 3 },
.flags = DISPLAY_FLAGS_HSYNC_HIGH | DISPLAY_FLAGS_VSYNC_LOW | DISPLAY_FLAGS_PIXDATA_NEGEDGE | DISPLAY_FLAGS_SYNC_POSEDGE | DISPLAY_FLAGS_DE_HIGH,
};
static const struct panel_desc displaytech_dt070btft = {
.timings = &displaytech_dt070btft_timing,
.num_timings = 1,
.bpc = 8,
.size = {
.width = 154,
.height = 85,
},
.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
.bus_flags = DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE | DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE | DRM_BUS_FLAG_DE_HIGH,
};
Let me know if any other information would be helpful.
Thanks,
Joseph Keene
