Hi Magnus, On Wednesday 15 June 2011 16:17:15 Magnus Damm wrote: > On Wed, Jun 15, 2011 at 6:16 AM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > > On Tuesday, June 14, 2011, Magnus Damm wrote: > >> On Sun, Jun 12, 2011 at 5:40 AM, Rafael J. Wysocki <rjw@xxxxxxx> wrote: > >> > From: Rafael J. Wysocki <rjw@xxxxxxx> > >> > > >> > Use the generic power domains support introduced by the previous > >> > patch to implement support for power domains on SH7372. > >> > > >> > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> > >> > --- > >> > >> Thanks for your work on this. I just tried this on my Mackerel board, > >> but I can't seem to get the pd_power_up() and pd_power_down() > >> callbacks to be executed. It is probably a misconfiguration from my > >> side. > > > > They trigger for me e.g. after doing > > > > # echo 3 > /sys/devices/platform/sh_mobile_lcdc_fb.0/graphics/fb0/blank > > > > Attached is the .config I've been using. > > Thanks, I can trigger using sysfs and your kernel configuration. > > However, I assumed it also would work when the sceen saver kicked in. > I recall it being fbcon that controls the screen save, perhaps > something else. So just wait a bit and see if you also can reproduce > it. The console gets black but the power is still on... That's because, by default, the VT layer will use FB_BLANK_NORMAL mode when blanking the console. Switching that to FB_BLANK_VSYNC_SUSPEND, FB_BLANK_HSYNC_SUSPEND or FB_BLANK_POWERDOWN with TIOCLINUX(TIOC_SETVESABLANK) results in the device being runtime-suspended when the console is blanked. > Also forcing to go back to powered-on state (see below) doesn't work that > well: # echo 0 > > /sys/devices/platform/sh_mobile_lcdc_fb.0/graphics/fb0/blank > > It looks like we loose the panning information somehow. Most likely a LCDC > driver bug. Unless the driver callbacks are not being invoked as expected. > > Also, there is garbage in on the screen if FB_SH_MOBILE_MERAM is > enabled. The MERAM hardware is a 1.5 MiB memory block that can be used > as a LCD cache. It sits in the same hardware power domain as the > LCDCs. I don't think the MERAM software supports power down > unfortunately. Disabling MERAM support removes the garbage on the > screen. -- Regards, Laurent Pinchart _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
