On 06/21/2017 08:32 AM, Sascha Hauer wrote:
Hi Gianluca,
On Mon, Jun 19, 2017 at 05:49:41PM +0200, gianluca wrote:
Hello Lucas, Sascha and the barebox mailing list guys!
I am back with the new boards batch release (now QuadPlus and DualLite iMX6)
Now I adapted barebox to fit both processors and it works quite well.
From Barebox point-of-view the ldb node of the device-tree is using three
timings and they are working good depending on which panel bridge board I am
connecting to (1280x800, 1024x600 and 800x480).
The custom startup code of barebox is looking for a special eeprom on the
panel-bridge and set the device tree accordingly, i.e. setting the
native-mode node to the correct display-timing.
The same device-tree is used in Linux (as in attachment) as you can see the
ldb section and the panel section, using a simple-panel and a correct panel
timing using the innolux,g101ice_l01 panel driver timings.
No, Linux does not support DT defined modes in the panel. You need a
panel with a proper compatible and driver.
See drivers/gpu/drm/panel. For most LVDS panels simple-panel is what you
want to use.
They are ignored in the Barebox starup (as you know barebox can use the
display-timings in the ldb section) but the panel section is used in linux.
Nevertheless it does not work.
What exactly does not work? No picture in barebox? Any error messages?
Does it work in Linux?
In Barebox no problem at all (screen frequency apart. For every
display-timing found it gives me @0 Hz...).
The problem is in Linux. The utility fbset is giving me 16bpp!!
The panel driver used (innolux,g101ice-l01) has the RGB888 format and
the ldb in the device-tree section has fsl,data-width = <24>
This issue is present for every panel I use (lg,lb070wv8 and
auo,b101aw03 too) so maybe some misconfiguration somewhere...
I was supposed to have 24 or 32 bit in the framebuffer driver using
fbset... May be some fbset issue?
Some issue??? I have no Xorg. only fbdev
--
Eurek s.r.l. |
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