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? Thanks a lot, Pavel > ----------------------------------------------------------- > 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 -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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