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Hi,<br>
I have an AIO computer with a Pegatron BYT-T1 motherboard. Looks
like a cheap motherboard (using J1900).<br>
It has an innolux 1366x768 panel (LVDS). The Motherboard also has
LVDS written on the connector.<br>
I'm running kernel 4.0.5 on it (tinycore custom kernel) and xrandr
displays the port as eDP1 (not LVDS).<br>
From what I can tell the panel is LVDS so I'm a little confused why
the kernel picks it up as eDP. The CPU is valleyview.<br>
<br>
The problem I have is this:<br>
When drm/i915 reads the EDID on eDP1, it gets a bunch of stuff
(including 1920x1080) and sets the resolution to that.<br>
But the panel supports 1366x768 as max. That seems to be saved on
VBT since if I use vga=0x37f I get 1366x768 on fb.<br>
But when drm reads 1920x1080 from EDID it sets that and the panel
goes into a weird mode (displaying colors) which I believe is a
testing mode.<br>
<br>
I could try to fix the EDID, and also could generate one and use the
drm_kms_helper to pass a binary EDID.<br>
What I don't understand is where is this EDID coming from. LVDS
supports EDID read? I don't see any i2c cable on the LVDS cable so I
don't understand how it can be reading the EDID.<br>
Is the EDID saved on BIOS somehow?<br>
<br>
I changed the code as suggested by this thread:<br>
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VLV: eDP: panel timings / resolution data from VBT, not via i2c
from eDP EDID<br>
<a class="moz-txt-link-freetext" href="http://www.spinics.net/lists/intel-gfx/msg64312.html">http://www.spinics.net/lists/intel-gfx/msg64312.html</a><br>
<br>
and I'm not letting edp read the EDID, so it fallbacks to VBT and
everything works great.<br>
But I'm still not convinced that the EDID data comes from the LVDS
Panel (since it should have different info)<br>
<br>
Hope anyone can share some insights on what is going on.<br>
Thanks<br>
<pre class="moz-signature" cols="72">--
Edgardo Gho
<a class="moz-txt-link-abbreviated" href="mailto:edgardo.g@telikin.com">edgardo.g@telikin.com</a>
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