Re: new PM branch available

[Kevin Hilman <khilman@deeprootsystems.com>]

Sriram V wrote:
> Hi,
>  Here are my observations on omap3evm.

Sriram,

Thanks for testing!

> 1) With default config file, The kernel boots. If youre seeing junk 
> after a certain point while booting. it could be related to your 
> bootargs console options. (console=ttyS0,115200n8)

I have the same console= bootargs.  Are you testing on an ES3 EVM?  What 
version of the bootloader to you have?  Mine reports:

Texas Instruments X-Loader 1.41
[...]
U-Boot 1.1.4 (Jun  5 2008 - 17:53:37)


> 2) Sometimes i do get  the usual omapfb errors.

These are "normal"

> 3) If i enable cpuidle - the ethernet driver is unable to get an IP 
>  address. So it is unable to mount NFS.  If i give a statically assigned 
> IP in my bootargs. NFS mount also fails. This happens only when cpuidle 
> is enabled.
> 4) If i enable SMC debug, i see ethernet interrupts happening, for some 
> reason. NFS mount/getting a dhcp address fails.
>   I am not sure if this is a wakeup issue. Sometimes, if i add some 
> debug prints it works. but this does not work every time.
> 5) If i boot with rootfs on MMC and with cpu idle enabled. i cannot 
> ping. cpuidle is somehow effecting the network stuff. I also see some rx 
> overruns. is this a wakeup issue?

I have not done any testing with ethernet, only initramfs or MMC rootfs. 
  This is indeed a wakeup issue.  The GPIO IRQ for smc91x is not 
currently set as a wakeup source, so ethernet activity will not wakeup 
the system, thus causing delays and other problems.

Can you try with rootfs on MMC, but with no ethernet (add ip=none to 
cmdline.)  Then try suspend/resume etc.

Kevin

> On Wed, Jan 14, 2009 at 10:09 PM, Kevin Hilman 
> <khilman@deeprootsystems.com <mailto:khilman@deeprootsystems.com>> wrote:
>  > Sriram V wrote:
>  >>
>  >> Hi,
>  >>    OMAP3EVM. all domains hit retention in suspend.
>  >>
>  >>  On enabling cpuidle, network and mmc is not stable. network is
>  >> unable to get an IP address.
>  >
>  > Sriram,
>  >
>  > Can you send me your .config for omap3evm?  I'm trying to get my recently
>  > received EVM working but I am getting lots of garbage on the serial 
> console
>  > on linux-omap HEAD and PM branch on omap3evm.  Do you have any additional
>  > patches for EVM that you're using?
>  >
>  > Kevin
>  >
>  >
>  >>
>  >> On Wed, Jan 14, 2009 at 3:21 AM, Kevin Hilman
>  >> <khilman@deeprootsystems.com <mailto:khilman@deeprootsystems.com>> 
> wrote:
>  >>>
>  >>> Hello,
>  >>>
>  >>> The latest PM branch is now available[1].
>  >>>
>  >>> I've done basic testing of retention and off-mode (suspend and dynamic
>  >>> idle) on Beagle and custom HW.  My SDP has something still keeping
>  >>> CORE active that others have not seen, but I have yet to debug.  Any
>  >>> other reports from SDP testing would be appreciated.
>  >>>
>  >>> Notable changes/updates
>  >>> - rebased on latest clock updates and fixes from Paul
>  >>> - clockfw pre- and post- notifiers
>  >>> - DVFS for VDD2
>  >>>
>  >>> Full git shortlog below[2]
>  >>>
>  >>> Enjoy,
>  >>>
>  >>> Kevin
>  >>>
>  >>> [1] See branch 'pm' in my git repo:
>  >>> 
> git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm.git 
> <http://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm.git>
>  >>> which is also mirrored as the branch 'pm' of the normal linux-omap
>  >>> repo (but will not sync until 03:30 GMT)
>  >>>
>  >>>
>  >>> [2] git shortlog:
>  >>>
>  >>> Carlos Chinea (1):
>  >>>     OMAP3:PM: Update SSI omapdev record
>  >>>
>  >>> Jouni Hogander (5):
>  >>>     OMAP3: PM: Use pwrdm_set_next_pwrst instead of set_pwrdm_state in
>  >>> idle loop
>  >>>     OMAP3: PM: Fix wrong sequence in suspend.
>  >>>     OMAP3: PM: Do not build suspend code if SUSPEND is not enabled
>  >>>     OMAP: PM: Build fails if PM is not enabled
>  >>>     OMAP2: PM: Fix omap2 build
>  >>>
>  >>> Kalle Jokiniemi (3):
>  >>>     OMAP: PM: sysfs interface for enabling voltage off in idle
>  >>>     OMAP3: PM: Fix cpu idle init sequencing
>  >>>     OMAP: SRF: Fixes to shared resource framework (Ver.3)
>  >>>
>  >>> Kevin Hilman (4):
>  >>>     OMAP3: PM: CPUidle: obey enable_off_mode flag
>  >>>     OMAP3: PM: CPUidle: restrict C-states on UART activity
>  >>>     OMAP3: PM: decouple PER and CORE context save and restore
>  >>>     OMAP2/3: PM: system_rev -> omap_rev()
>  >>>
>  >>> Paul Walmsley (29):
>  >>>     OMAP2/3 clock: implement clock notifier infrastructure
>  >>>     OMAP clock: add notifier infrastructure
>  >>>     OMAP2/3 clock: store planned clock rates into temporary rate 
> storage
>  >>>     OMAP2/3 clock: add clk post-rate-change notifiers
>  >>>     OMAP2/3 clock: add clock pre-rate-change notification
>  >>>     OMAP2/3 clock: add clock prepare-rate-change notifications
>  >>>     OMAP2/3 clock: add clock abort-rate-change notifications
>  >>>     OMAP2/3 PM: create the OMAP PM interface and add a default OMAP PM
>  >>> no-op layer.
>  >>>     OMAP2/3 omapdev: add basic omapdev structure
>  >>>     OMAP242x omapdev: add OMAP242x omapdev records
>  >>>     OMAP243x omapdev: add OMAP243x omapdev records
>  >>>     OMAP3xxx omapdev: add OMAP3xxx omapdev records
>  >>>     OMAP2/3 omapdev: add code to walk the omapdev records
>  >>>     ARM: MMU: add a Non-cacheable Normal executable memory type
>  >>>     OMAP3 SRAM: mark OCM RAM as Non-cacheable Normal memory
>  >>>     OMAP3 SRAM: add ARM barriers to omap3_sram_configure_core_dpll
>  >>>     OMAP3 clock: add interconnect barriers to CORE DPLL M2 change
>  >>>     OMAP3 SRAM: clear the SDRC PWRENA bit during SDRC frequency change
>  >>>     OMAP3 SDRC: Add 166MHz, 83MHz SDRC settings for the BeagleBoard
>  >>>     OMAP3 SDRC: initialize SDRC_POWER at boot
>  >>>     OMAP3 SRAM: renumber registers to make space for argument passing
>  >>>     OMAP3 clock: only unlock SDRC DLL if SDRC clk < 83MHz
>  >>>     OMAP3 clock: use pr_debug() rather than pr_info() in some clock
>  >>> change code
>  >>>     OMAP3 clock: remove wait for DPLL3 M2 clock to stabilize
>  >>>     OMAP3 clock: initialize SDRC timings at kernel start
>  >>>     OMAP3 clock: add a short delay when lowering CORE clk rate
>  >>>     OMAP3 clock/SDRC: program SDRC_MR register during SDRC clock change
>  >>>     OMAP3 SRAM: add more comments on the SRAM code
>  >>>     OMAP3 SRAM: convert SRAM code to use macros rather than magic 
> numbers
>  >>>
>  >>> Peter 'p2' De Schrijver (12):
>  >>>     OMAP: PM counter infrastructure.
>  >>>     OMAP: PM: Hook into PM counters
>  >>>     OMAP: PM: Add closures to clkdm_for_each and pwrdm_for_each.
>  >>>     OMAP: PM: Add pm-debug counters
>  >>>     OMAP: PM debug: make powerdomains use PM-debug counters
>  >>>     OMAP: PM: Add definitions for ETK pads and observability registers
>  >>>     OMAP: Debug observability and ETK padconf implementation
>  >>>     OMAP: Add debug observablity (debobs) Kconfig item
>  >>>     OMAP: PM: Implement get_last_off_on_transaction_id()
>  >>>     Save sram context after changing MPU, DSP or core clocks
>  >>>     Fix omap_getspeed.
>  >>>     Make sure omap cpufreq driver initializes after cpufreq 
> framework and
>  >>> governors
>  >>>
>  >>> Rajendra Nayak (35):
>  >>>     OMAP3: PM: GPMC context save/restore
>  >>>     OMAP3: PM: GPIO context save/restore
>  >>>     OMAP3: PM: I2C context save/restore
>  >>>     OMAP3: PM: INTC context save/restore
>  >>>     OMAP3: PM: PRCM context save/restore
>  >>>     OMAP3: PM: Populate scratchpad contents
>  >>>     OMAP3: PM: SCM context save/restore
>  >>>     OMAP3: PM: SRAM restore function
>  >>>     OMAP3: PM: handle PER/NEON/CORE in idle
>  >>>     OMAP3: PM: Restore MMU table entry
>  >>>     OMAP3: PM: MPU off-mode support
>  >>>     OMAP3: PM: CORE domain off-mode support
>  >>>     OMAP3: PM: allow runtime enable/disable of OFF mode
>  >>>     OMAP3: 3430SDP minimal kernel defconfig
>  >>>     OMAP3: PM: CPUidle: Basic support for C1-C2
>  >>>     OMAP3: PM: CPUidle: Enables state C4
>  >>>     OMAP3: PM: CPUidle: Enables C3 and C5
>  >>>     OMAP3: PM: CPUidle: Safe-state on bm-activity
>  >>>     OMAP3 SRF: Generic shared resource f/w
>  >>>     OMAP3 SRF: MPU/CORE/PD latency modeling
>  >>>     OMAP3 SRF: omap3 srf driver
>  >>>     OMAP3 SRF: OMAP PM srf implementation
>  >>>     OMAP3 SRF: Add CORE rate table param in OMAP-PM
>  >>>     OMAP3 SRF: Add VDD1/VDD2 rate tables for 3430SDP
>  >>>     OMAP3 SRF: Add virt clk nodes for VDD1/VDD2
>  >>>     OMAP3 SRF: Adds OPP/Freq res's in SRF
>  >>>     OMAP3 SRF: Update OMAP-PM layer
>  >>>     OMAP3 SRF: Voltage scaling support
>  >>>     OMAP3 SRF: VDD2 scaling support
>  >>>     OMAP3 SRF: Adds sysfs control for VDD1/VDD2 OPP's
>  >>>     OMAP3 PM: Replace spinlocks with mutex in SRF
>  >>>     OMAP3 PM: CPUFreq driver for OMAP3
>  >>>     OMAP3 PM: Update the min defconfig for 3430sdp
>  >>>     OMAP3 SRF: Fix crash on non-3430SDP platforms with DVFS/CPUFreq
>  >>>     OMAP3: PM: Scale VDD2 OPP for VDD1 OPP3 and higher
>  >>>
>  >>> Tero Kristo (26):
>  >>>     OMAP: PM debug: do not print out status for meta powerdomains 
> (dpll*)
>  >>>     OMAP: PM debug: Add PRCM register dump support
>  >>>     OMAP: PM: DMA context save / restore
>  >>>     OMAP: PM: off-mode support for DMA on EMU/HS devices
>  >>>     OMAP3: SRAM size fix for HS/EMU devices
>  >>>     OMAP3 PM: off-mode support for HS/EMU devices
>  >>>     OMAP3: PM: Enable SDRAM auto-refresh during sleep
>  >>>     OMAP: SDRC: Add new register definitions for SDRAM controller
>  >>>     OMAP3: PM: SDRC auto-refresh workaround for off-mode
>  >>>     PM: Added three PLL registers to the PRCM context save
>  >>>     PM: Changed secure RAM storage size from 0x8000 to 0x803F
>  >>>     PM: Added suspend target state control to debugfs for OMAP3
>  >>>     OMAP3: PM: Prevent PER from going OFF when CORE is going INA
>  >>>     PM OMAP3: Change omap3_save_secure_ram to be called only during 
> init
>  >>>     OMAP3: PM: MPU and CORE should stay awake if there is CAM domain
>  >>> ACTIVE
>  >>>     OMAP3: GPIO fixes for off-mode
>  >>>     PM: OMAP3: Refreshed DVFS VDD1 control against latest clock fw
>  >>>     OMAP3: Add support for DPLL3 divisor values higher than 2
>  >>>     OMAP3: PM: Fixed VDD2 control to work from both sysfs and SRF API
>  >>>     OMAP3: PM: Added DVFS OPP locking interface for VDD1 and VDD2
>  >>>     OMAP3: Fix rate calculation bug in omap3_select_table_rate
>  >>>     OMAP3: PM: Prevented DVFS state switches when enabling off-mode
>  >>>     OMAP3: PM: Enable VDD2 OPP1
>  >>>     OMAP3: PM: Fix linker error without CONFIG_PM option
>  >>>     PM: OMAP3: Removed a couple of unused variables from DVFS code
>  >>>     PM: OMAP3: Added support for possibly failing clk_set_rate to DVFS
>  >>>
>  >>> --
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