Hi, On Thu, Oct 26, 2017 at 11:57:34AM +0200, Pavel Machek wrote: > On Thu 2017-10-26 11:31:15, Sebastian Reichel wrote: > > Hi, > > > > On Thu, Oct 26, 2017 at 11:13:26AM +0200, Pavel Machek wrote: > > > On Wed 2017-10-25 14:28:07, Tony Lindgren wrote: > > > > * Pavel Machek <pavel@xxxxxx> [171025 13:36]: > > > > > Hi! > > > > > > > > > > ...hardware should be identical. 3.5.3-nemo kernel seems to work on > > > > > both. 4.13-rc2 with display and clock patches boots on phone "S", but > > > > > does not on phone "P"; nothing nothing is received on serial port. > > > > > > > > > > There is some difference in the bootloaders: S's bootloader provides > > > > > lots of debug info, P's is silent. R&D settings do _not_ have > > > > > influence on bootloader. We know P's serial works, as 3.5.3 kernel > > > > > prints "Uncompressing linux...booting" there. > > > > > > > > > > I'll need to return "S" phone and serial cable tommorow. If you have > > > > > any ideas, let me know. > > > > > > > > If you get nothing out of the uart, chances are the pins are > > > > not muxed for the uart in nolo and maybe kernel dts is missing the > > > > pinctrl entries for uart? > > > > > > > > Also try booting with mem=512M@0x80000000 or 256M or 768M. Maybe the > > > > memory is different size or partially broken? > > > > > > Uhuh. It looks like "P" nokia really wants initrd, otherwise it will > > > not boot. > > > > > > I got "uncompressing Linux 4.13" on serial console now, debug LEDs > > > blinking, and if I use a flashlight, I see output on the screen, too. > > > > > > (What do I need to do to get the backlight working?) > > > > Glad you got it working :) For backlight you can add this > > in drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c: > > > > add the following code at the end of dsicm_probe: > > You did not actually include code to paste into panel-dsi-cm, can you > try a again? I added it directly below and you quoted it. I guess you mistook it for a signature or something :) -- Sebastian > > ----------------------------------------------------------- > > mutex_unlock(&ddata->lock); > > mutex_lock(&ddata->lock); > > ddata->in->ops.dsi->bus_lock(ddata->in); > > r = dsicm_wake_up(ddata); > > if (!r) > > r = dsicm_dcs_write_1(ddata, DCS_BRIGHTNESS, 100); > > ddata->in->ops.dsi->bus_unlock(ddata->in); > > mutex_unlock(&ddata->lock); > > ----------------------------------------------------------- > > > > -- Sebastian
Attachment:
signature.asc
Description: PGP signature
