[Intel-gfx] [PATCH 00/36] introduce pipe_config with fdi auto-dithering

[Daniel Vetter]

Hi all,

So here it finally is, the pipe_config infrastructure with fdi link bw
constraint required auto-dithering. Like every serious undertaking in modeset
land there seems to be no way to get anywhere in less than 20 patches. Check out
the very last patch for how simply this was to implement, once all the
infrastructure work and tedios code movement was completed.

The reason why we really need this is that on configurations with only 2 fdi
lanes (hsw vga or ivb 3-pipe) we can't even fit a standard 1080p mode in at
24bpp. Which is just plain ridiculous. Works like a charm now.

Another neat little improvement is that we now correctly handle the cpu edp case
for fdi b/c lane sharing. Which means you can use the full edp bandwidth _and_
two 4 lane fdi links if you put the panel onto pipe C.

There's also a bit of fluff to clean up and structure a few things not strictly
required for the fdi auto dither feature: Our usage of private mode flags is
gone, now we have explicit flags. Also, I've started to rework the clock code by
tackling the fixed DP clocks (safe for vlv since I don't have one). But that
part is a bit incomplete insofar as I didn't add any hw state readout and check
code for this yet. Probably better done once we integrate this properly for
fastboot clock handling.

But the big reasons the patch count blew up was that the current high bpc code
looked really broken:
- hdmi only enabled 12bpc when feeding in 12bpc. Which is rather hard to pull
  off with the current code ...
- hdmi didn't adjust the port clock correctly for 12bpc mode.
- DP hardcoded a limit of 8bpc in it's link bw code.
- vga actually worked, but who's gonna see more than 8 bpc on an analog output?

Only lightly tested thus far, but I wanted to throw this over the wall before I
disappear for a bit of snowboarding next week.

Oh, and it's not rebased onto latest dinq, so will conflict with Paulo's recent
hdmi/sdvo refactorings.

Cheers, Daniel

Daniel Vetter (36):
  drm/i915: introduce struct intel_crtc_config
  drm/i915: compute pipe_config earlier
  drm/i915: add pipe_config->timings_set
  drm/i915: add pipe_config->pixel_multiplier
  drm/i915: add pipe_config->has_pch_encoder
  drm/i915: clear up the fdi/dp set_m_n confusion
  drm/i915: move pipe bpp computation to pipe_config
  drm/i915: clean up plane bpp confusion
  drm/i915: clean up pipe bpp confusion
  drm/i915: move dp_m_n computation to dp_encoder->compute_config
  drm/i915: track dp target_clock in pipe_config
  drm/i915: rip out superflous is_dp&is_cpu_edp tracking
  drm/i915: add hw state readout/checking for pipe_config
  drm/i915: hw readout support for ->has_pch_encoders
  drm/i915: gen2 has no tv out support
  drm/i915: create pipe_config->dpll for clock state
  drm/i915: move dp clock computations to encoder->compute_config
  drm/i915: add pipe_config->limited_color_range
  drm/i915: use pipe_config for lvds dithering
  drm/i915: move intel_crtc->fdi_lanes to pipe_config
  drm/i915: fixup 12bpc hdmi dotclock handling
  drm/i915: hw state readout support for pipe_config->fdi_lanes
  drm/i915: split up fdi_set_m_n into computation and hw setup
  drm/i915: Disable high-bpc on pre-1.4 EDID screens
  drm/i915: force bpp for eDP panels
  drm/i915: allow high-bpc modes on DP
  drm/i915: extract i9xx_set_pipeconf
  drm/i915: drop adjusted_mode from *_set_pipeconf functions
  drm/i915: implement high-bpc + pipeconf-dither support for g4x/vlv
  drm/i915: compute fdi lane config earlier
  drm/i915: Split up ironlake_check_fdi_lanes
  drm/i915: move fdi lane configuration checks ahead
  drm/i915: don't count cpu ports for fdi B/C lane sharing
  drm/i915: consolidate pch pll computations a bit
  drm/i915: drop haswell fdi lane check from intel_crt_mode_valid
  drm/i915: implement fdi auto-dithering

 drivers/gpu/drm/i915/i915_drv.h      |    9 +-
 drivers/gpu/drm/i915/intel_crt.c     |   17 +-
 drivers/gpu/drm/i915/intel_ddi.c     |   33 +-
 drivers/gpu/drm/i915/intel_display.c | 1339 +++++++++++++++++-----------------
 drivers/gpu/drm/i915/intel_dp.c      |  238 +++---
 drivers/gpu/drm/i915/intel_drv.h     |  111 ++-
 drivers/gpu/drm/i915/intel_hdmi.c    |   57 +-
 drivers/gpu/drm/i915/intel_lvds.c    |   47 +-
 drivers/gpu/drm/i915/intel_sdvo.c    |   50 +-
 drivers/gpu/drm/i915/intel_tv.c      |   14 +-
 10 files changed, 1002 insertions(+), 913 deletions(-)

-- 
1.7.11.4