[PATCHv2 00/28] OMAP DSS runtime PM adaptation

[Tomi Valkeinen <tomi.valkeinen@ti.com>]

Hi,

This patch set implements runtime PM adaptation for OMAP DSS driver.

This is second version of the set, changing the way pm_runtime is used. In this
version the omapdss' pm_runtime adaptation is written as it should be, using
pm_runtime callbacks, in which context save/restore and opt-clock
enables/disables are made.

This required changes (hacks?) to OMAP4 hwmod database, but it is meant to be
fixed when the hwmod fmwk is improved to handle the DSS clocks properly.
However, when that fix is done, omapdss driver won't need any changes.

The bulk of the code is in the "OMAP: DSS2: Use PM runtime & HWMOD support"
patch, which is a bit too large for comfort, but I haven't found out ways to
split it up.

All DSS HW modules now handle enabling and disabling of the HW block
independently via pm_runtime calls. Some DSS modules also require other DSS
modules, and for that we have functions like dispc_runtime_get/put() which can
be used to enable that module.

Previously DSS driver did reset the HW every time before taking it into use.
This can no longer be done, as HWMOD framework handles the reset. While the
driver works without resetting the HW, an error could render the HW inoperable
and currently the driver may not be able to recover. So these patches may make
the driver more unreliable on error cases.

If a way to reset the HWMOD is added to the HWMOD framework, DSS driver can
take it into use and the above mentioned problem should go away.

Tested on OMAP4 Blaze, OMAP3 Overo, OMAP2420 N800. (However, N800 needs extra
patches to get it and DSS2 running, can be found from n800 branch in my tree).

The patch set still contains "OMAP: change get_context_loss_count ret value to
int" for completeness, but the patch should go through Paul Walmsley.

These patches can be found from:

git://gitorious.org/linux-omap-dss2/linux.git pmruntime

Changes in v2:
* Add a HWMOD patch "OMAP4: HWMOD: change DSS main_clk scheme", which allows us
  to use pm_runtime as it should.
* Modify "OMAP: DSS2: Use PM runtime & HWMOD support" to use pm_runtime as it
  should.

 Tomi

Tomi Valkeinen (28):
  OMAP: change get_context_loss_count ret value to int
  OMAP: DSS2: Taal: Make driver more fault tolerant
  OMAP: DSS2: Reset LANEx_ULPS_SIG2 bits after use
  OMAP: DSS2: Handle dpll4_m4_ck in dss_get/put_clocks
  OMAP: DSS2: Clean up probe for DSS & DSI
  OMAP: DSS2: Init dispc first before other components
  OMAP: DSS2: Remove clk optimization at dss init
  OMAP: DSS2: rewrite use of context_loss_count
  OMAP: DSS2: Use omap_pm_get_dev_context_loss_count to get ctx loss
    count
  OMAP: DSS2: DPI: remove unneeded SYSCK enable/disable
  OMAP: DSS2: Add FEAT_VENC_REQUIRES_TV_DAC_CLK
  OMAP: DSS2: Add new FEAT definitions for features missing from OMAP2
  OMAP: DSS2: Remove core_dump_clocks
  OMAP: DSS2: Remove CONFIG_OMAP2_DSS_SLEEP_BEFORE_RESET
  OMAP4: HWMOD: Modify DSS opt clocks
  OMAP3: HWMOD: Add DSS opt clocks
  OMAP2420: HWMOD: Add DSS opt clocks
  OMAP2430: HWMOD: Add DSS opt clocks
  OMAP4: HWMOD: change DSS main_clk scheme
  OMAP: DSS2: Use PM runtime & HWMOD support
  OMAP4: HWMOD: Remove unneeded DSS opt clocks
  OMAP: DSS2: Remove unused opt_clock_available
  OMAP: DSS2: DISPC: remove finegrained clk enables/disables
  OMAP: DSS2: Remove unused code from display.c
  OMAP: DSS2: Remove ctx loss count from dss.c
  OMAP4: CLKDEV: Remove omapdss clock aliases
  OMAP: DSS2: DISPC: Fix context save/restore
  OMAP: DSS2: DSS: Fix context save/restore

 arch/arm/mach-omap2/clock44xx_data.c          |   10 +-
 arch/arm/mach-omap2/display.c                 |   26 +-
 arch/arm/mach-omap2/omap_hwmod.c              |    2 +-
 arch/arm/mach-omap2/omap_hwmod_2420_data.c    |   19 +
 arch/arm/mach-omap2/omap_hwmod_2430_data.c    |   19 +
 arch/arm/mach-omap2/omap_hwmod_3xxx_data.c    |   37 ++-
 arch/arm/mach-omap2/omap_hwmod_44xx_data.c    |   71 +++-
 arch/arm/mach-omap2/powerdomain.c             |   14 +-
 arch/arm/mach-omap2/powerdomain.h             |    2 +-
 arch/arm/plat-omap/include/plat/omap-pm.h     |    4 +-
 arch/arm/plat-omap/include/plat/omap_device.h |    2 +-
 arch/arm/plat-omap/include/plat/omap_hwmod.h  |    2 +-
 arch/arm/plat-omap/omap-pm-noop.c             |   24 +-
 arch/arm/plat-omap/omap_device.c              |    2 +-
 drivers/video/omap2/displays/panel-taal.c     |   33 +-
 drivers/video/omap2/dss/Kconfig               |   12 -
 drivers/video/omap2/dss/core.c                |   15 +-
 drivers/video/omap2/dss/dispc.c               |  483 +++++++++++----------
 drivers/video/omap2/dss/dpi.c                 |   73 ++--
 drivers/video/omap2/dss/dsi.c                 |  262 +++++++-----
 drivers/video/omap2/dss/dss.c                 |  583 ++++++-------------------
 drivers/video/omap2/dss/dss.h                 |   34 +-
 drivers/video/omap2/dss/dss_features.c        |   13 +-
 drivers/video/omap2/dss/dss_features.h        |    4 +
 drivers/video/omap2/dss/hdmi.c                |  161 +++++--
 drivers/video/omap2/dss/manager.c             |    8 +-
 drivers/video/omap2/dss/overlay.c             |   27 +-
 drivers/video/omap2/dss/rfbi.c                |  110 ++++-
 drivers/video/omap2/dss/sdi.c                 |   40 ++-
 drivers/video/omap2/dss/venc.c                |  163 ++++++-
 include/video/omapdss.h                       |    4 +-
 31 files changed, 1214 insertions(+), 1045 deletions(-)

-- 
1.7.4.1