[PATCH 0/6] drm/i915/bxt: Fix DDI PHY setup for low resolutions

From: Imre Deak <imre.deak@intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 0/6] drm/i915/bxt: Fix DDI PHY setup for low resolutions
Date: Tue,  7 Jun 2016 21:24:27 +0300	[thread overview]
Message-ID: <1465323873-9786-1-git-send-email-imre.deak@intel.com> (raw)

There are two problems with the current way of enabling the DDI PHYs
during driver loading/resuming:
Relying on the HWs dynamic power gating may waste some power and part of
the PHY configuration is dependent on the mode specific DDI lane count.
To solve both of these issues split the PHY initialization, moving one
half of it to the power well code the other half to the modeset code,
similarly to the CHV code.

Kudos to Ville for explaining about the PHY power gating and other
quirks on CHV, it helped a lot to better understand the BXT PHY which is
quite similar.

This fixes modeset problems for modes with less than 4 lanes.

Imre Deak (6):
  drm/i915/bxt: Wait for PHY1 GRC calibration synchronously
  drm/i915: Factor out intel_power_well_get/put
  drm/i915/bxt: Move DDI PHY enabling/disabling to the power well code
  drm/i915/bxt: Set DDI PHY lane latency optimization during modeset
  drm/i915/bxt: Rename broxton to bxt in PHY/CDCLK function prefixes
  drm/i915/bxt: Sanitiy check the PHY lane power down status

 drivers/gpu/drm/i915/i915_reg.h         |  12 ++
 drivers/gpu/drm/i915/intel_ddi.c        | 222 ++++++++++++++++++--------------
 drivers/gpu/drm/i915/intel_display.c    |  33 +++--
 drivers/gpu/drm/i915/intel_drv.h        |  19 ++-
 drivers/gpu/drm/i915/intel_runtime_pm.c | 133 ++++++++++++++++---
 5 files changed, 291 insertions(+), 128 deletions(-)

-- 
2.5.0

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