Salut Jean On Thu, 2 Dec 2010, Jean Pihet wrote: > On Thu, Dec 2, 2010 at 8:23 AM, Paul Walmsley <paul@xxxxxxxxx> wrote: > > On Thu, 25 Nov 2010, Jean Pihet wrote: > >> On Thu, Nov 25, 2010 at 6:35 PM, Paul Walmsley <paul@xxxxxxxxx> wrote: > >> > On Thu, 25 Nov 2010, Jean Pihet wrote: > >> >> On Thu, Nov 25, 2010 at 12:49 AM, Paul Walmsley <paul@xxxxxxxxx> wrote: > >> >> > > >> >> > The console semaphore must be held while the OMAP UART devices are > >> >> > disabled, lest a console write cause an ARM abort (and a kernel crash) > >> >> > when the underlying console device is inaccessible. These crashes > >> >> > only occur when the console is on one of the OMAP internal serial > >> >> > ports. > >> >> This does not fix the issue for me on Beagle (console on ttyO2). > >> >> > >> >> Doing: > >> >> / # echo 5 > /sys/devices/platform/omap/omap-hsuart.0/sleep_timeout > >> >> / # echo 5 > /sys/devices/platform/omap/omap-hsuart.1/sleep_timeout > >> >> / # echo 5 > /sys/devices/platform/omap/omap-hsuart.2/sleep_timeout > >> >> and waiting 5 seconds hangs the console. > >> > > >> > By the way, you write that the above situation "hangs the console." Is it > >> > just the case that the console dies and the rest of the system is still > >> > alive, or does the whole system crash? > >> The console hangs, the rest of the system still runs. > > > > Just out of curiosity, if you send a few breaks to the OMAP over serial, > > does that cause the console to pay attention again? CTRL-A F in minicom. > Yes it helps. In most cases sending 2-3 breaks resumes the UART console. Could you try enabling DSS in your .config? I applied the following to my omap2plus_defconfig after make oldnoconfig, and the console is now working again for me. Hopefully adding DSS hwmod stuff will fix this... - Paul --- .config 2010-12-03 18:05:31.661889255 -0700 +++ .config.sleep.working 2010-12-03 18:03:57.733918058 -0700 @@ -1,7 +1,7 @@ # # Automatically generated make config: don't edit # Linux/arm 2.6.37-rc4 Kernel Configuration -# Fri Dec 3 18:05:31 2010 +# Fri Dec 3 18:00:21 2010 # CONFIG_ARM=y CONFIG_SYS_SUPPORTS_APM_EMULATION=y @@ -1465,9 +1465,28 @@ # CONFIG_FB_METRONOME is not set # CONFIG_FB_MB862XX is not set # CONFIG_FB_BROADSHEET is not set -# CONFIG_FB_OMAP is not set CONFIG_FB_OMAP_LCD_VGA=y -# CONFIG_OMAP2_DSS is not set +CONFIG_OMAP2_DSS=y +CONFIG_OMAP2_VRAM_SIZE=0 +CONFIG_OMAP2_DSS_DEBUG_SUPPORT=y +# CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS is not set +CONFIG_OMAP2_DSS_DPI=y +# CONFIG_OMAP2_DSS_RFBI is not set +CONFIG_OMAP2_DSS_VENC=y +# CONFIG_OMAP2_DSS_SDI is not set +# CONFIG_OMAP2_DSS_DSI is not set +# CONFIG_OMAP2_DSS_FAKE_VSYNC is not set +CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK=0 +# CONFIG_FB_OMAP2 is not set + +# +# OMAP2/3 Display Device Drivers +# +# CONFIG_PANEL_GENERIC is not set +# CONFIG_PANEL_SHARP_LS037V7DW01 is not set +# CONFIG_PANEL_SHARP_LQ043T1DG01 is not set +# CONFIG_PANEL_TOPPOLY_TDO35S is not set +# CONFIG_PANEL_TPO_TD043MTEA1 is not set CONFIG_BACKLIGHT_LCD_SUPPORT=y CONFIG_LCD_CLASS_DEVICE=y # CONFIG_LCD_L4F00242T03 is not set
