[Intel-gfx] [PATCH 00/43] [RFC] modeset rework, part 1

[Daniel Vetter]

Hi all,

This patch bomb is just the prep work for the actual rework ;-)

The goal of this little adventure is to move away from the crtc helper code,
which has the fundamental assumption that encoders and crtc can be
enabled/disabled in any order, as long as we take care of depencies.

Our hw works differently. We already have tons of ugly cases where crtc code
enable encoder hw (or encoder->mode_set enables stuff that should only be
enabled in enocder->commit) to work around these issues. But on the disable side
we can't pull off similar tricks - there we actually need to rework the modeset
sequence that controls all this.

Quick summary of the changes in here - the patches that actually introduce a new
concept all have rather extensive commit messages to explain things:
- Add new encoder->enable/disable functions which are directly called from the
  crtc->enable/disable function. This ensures that the encoder's can be
  enabled/disabled at a very specific in the modeset sequence, controlled by our
  platform specific code.
- Rework the dpms code - our code has mostly 1:1 connector:encoder mappings and
  does support cloning on on a few encoders, so we can simplify things quite a
  bit. Also only ever disable/enable the entire output pipeline - this ensures
  that we obey the right sequence of enabling/disabling things. For cloneable
  encoders this requires a bit of special handling to ensure that outputs can
  still be disabled individually, but it simplifies the common case quite a bit.
- Add infrastructure to read out the current hw state. No amount of careful
  ordering will help us if we brick the hw on the first modesetup. Which could
  happen if we just randomly disable things, oblivious to the state set up by
  the bios. Hence we need to be able to read that out. As a benefit, we grow a
  few generic functions useful to cross-check our modeset code with actual hw
  state.
- A few little changes/cleanups in a few encoders to make the above less
  onerous.

Things that are still needed:
- Reworking the modeset code - the current copy&pasted code still pretty much
  works like the crtc helper and doesn't disable things correctly yet.
- Once the above is in place, add new hooks to enable special connectors at the
  right place. I'm thinking of encoder->pre_enable and encoder->post_disable,
  which would each run after/before the plane/pipe/plls.
- Actually fix the cpu edp bugs (and port the hsw dp code) with the new hooks.

And further out, i.e. auxiliary benefits:
- Fix up our confusion in the resume path - we enable a few encoders by accident
  when restoring registers.
- Clean things up by moving a few of the existing hacks around, e.g. the edp pll
  enabling or the lvds/pll enabling.
- fastboot - the hw state readout code is neat prep work for that, the patch
  itself lists some of the missing bits.
- Fixing all the bugs turned up by the more stringent cross-checking the new
  code allows - the last patch in this series gives a glimpse, but I plan to add
  much more after the modeset sequence has saner semantics.

Patch series lightly tested, atm I'm beating on it with my machines. Due to lack
of hw, I'm looking for people with TV out and dvo encoders ...

Comments, flames, ideas and rants highly welcome. I hope that I can send out and
RFC with the new modeset code in a few days at most.

Cheers, Daniel

Daniel Vetter (43):
  drm/i915: introduce for_each_encoder_on_crtc
  drm/i915: add crtc->enable/disable vfuncs insted of dpms
  drm/i915: rip out crtc prepare/commit indirection
  drm/i915: add direct encoder disable/enable infrastructure
  drm/i915: add missing gen2 pipe A quirk entries
  drm/i915: rip out the overlay pipe A workaround
  drm/i915: prepare load-detect pipe code for dpms changes
  drm/i915/hdmi: convert to encoder->disable/enable
  drm/i915/tv: convert to encoder enable/disable
  drm/i915/lvds: ditch ->prepare special case
  drm/i915/lvds: convert to encoder disable/enable
  drm/i915/dp: convert to encoder disable/enable
  drm/i915: create VLV_DSIPLAY_BASE #define
  drm/i915: group ADPA #defines together
  drm/i915: add inte_crt->adpa_reg
  drm/i915/crt: convert to encoder disable/enable
  drm/i915/sdvo: convert to encoder disabl/enable
  drm/i915: simplify dvo dpms interface
  drm/i915: simplify possible_clones computation
  drm/i915: add port parameter to intel_hdmi_init
  drm/i915: convert dpms functions of dvo/sdvo/crt
  drm/i915: rip out encoder->disable/enable checks
  drm/i915: clean up encoder_prepare/commit
  drm/fb helper: don't call drm_crtc_helper_set_config
  drm: remove the list_head from drm_mode_set
  drm/i915: copy&paste drm_crtc_helper_set_config
  drm/i915: call set_base directly
  drm/i915: inline intel_best_encoder
  drm/i915: copy&paste drm_crtc_helper_set_mode
  drm/i915: simplify intel_crtc_prepare_encoders
  drm/i915: rip out encoder->prepare/commit
  drm/i915: call crtc functions directly
  drm/i915: WARN when trying to enabled an unused crtc
  drm/i915: Add interfaces to read out encoder/connector hw state
  drm/i915/dp: implement get_hw_state
  drm/i915/hdmi: implement get_hw_state
  drm/i915/tv: implement get_hw_state
  drm/i915/lvds: implement get_hw_state
  drm/i915/crt: implement get_hw_state
  drm/i915/sdvo: implement get_hw_state
  drm/i915/dvo: implement get_hw_state
  drm/i915: read out the modeset hw state at load and resume time
  drm/i915: check connector hw/sw state

 drivers/gpu/drm/drm_fb_helper.c      |    2 +-
 drivers/gpu/drm/i915/dvo.h           |   15 +-
 drivers/gpu/drm/i915/dvo_ch7017.c    |   21 +-
 drivers/gpu/drm/i915/dvo_ch7xxx.c    |   17 +-
 drivers/gpu/drm/i915/dvo_ivch.c      |   23 +-
 drivers/gpu/drm/i915/dvo_sil164.c    |   20 +-
 drivers/gpu/drm/i915/dvo_tfp410.c    |   18 +-
 drivers/gpu/drm/i915/i915_drv.c      |    3 +-
 drivers/gpu/drm/i915/i915_drv.h      |    8 +-
 drivers/gpu/drm/i915/i915_reg.h      |   52 +-
 drivers/gpu/drm/i915/intel_crt.c     |  157 ++++--
 drivers/gpu/drm/i915/intel_ddi.c     |   59 ++-
 drivers/gpu/drm/i915/intel_display.c | 1006 ++++++++++++++++++++++++++--------
 drivers/gpu/drm/i915/intel_dp.c      |  178 ++++---
 drivers/gpu/drm/i915/intel_drv.h     |   64 ++-
 drivers/gpu/drm/i915/intel_dvo.c     |  105 +++-
 drivers/gpu/drm/i915/intel_hdmi.c    |  203 ++++---
 drivers/gpu/drm/i915/intel_lvds.c    |   91 ++--
 drivers/gpu/drm/i915/intel_overlay.c |   58 +--
 drivers/gpu/drm/i915/intel_sdvo.c    |  178 +++++--
 drivers/gpu/drm/i915/intel_tv.c      |   56 ++-
 include/drm/drm_crtc.h               |    2 -
 22 files changed, 1645 insertions(+), 691 deletions(-)

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1.7.7.6