[Intel-gfx] [PATCH 0/3] BYT DSI Dual Link Support

[Jani Nikula]

Hi Shobhit and Gaurav -

I've been pondering this whole MIPI DSI pipes vs. ports thing and
discussing with Ville and others. Rather than try and fail in explaining
the ideas, here are some concrete patches to describe what I'd like to
be done first.

The most important thing is that we don't confuse the pipes and
ports. Getting confused was easy with the pipe B mapping to port C, and
the register defines being very confused/confusing about it. These
patches attempt to fix that. Before adding dual link support, there's a
simple function mapping the pipe to port.

Next up is expanding that to handle multiple ports driven from one
pipe. That's handled by adding intel_dsi->ports bitmap that has the bit
set for each port that is to be driven. I've added the bitmap and some
helpers to iterate over the configured ports, but there's no actual
support for doing the configuration. I'm hoping you could take over from
here. There's a sample patch about the usage.

I'm sorry it's taken me so long to reply. With the new stuff coming in,
I really think it's important to get the foundation right
first. Especially because I'm to blame for getting some of the port/pipe
stuff confused in the first place...

BR,
Jani.



Jani Nikula (3):
  drm/i915/dsi: clean up MIPI DSI pipe vs. port usage
  drm/i915/dsi: add ports to intel_dsi to describe the ports being
    driven
  drm/i915/dsi: an example how to handle dual link for each port

 drivers/gpu/drm/i915/i915_reg.h      | 303 ++++++++++++++++++-----------------
 drivers/gpu/drm/i915/intel_dsi.c     | 151 ++++++++---------
 drivers/gpu/drm/i915/intel_dsi.h     |  19 +++
 drivers/gpu/drm/i915/intel_dsi_cmd.c |  76 ++++-----
 4 files changed, 290 insertions(+), 259 deletions(-)

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2.1.1