[Intel-gfx] [MIPI SEQ PARSING v2 PATCH 00/11] Patches to support the version 3 of MIPI sequence in VBT.

Deepak M m.deepak at intel.com
Wed Sep 9 16:24:19 PDT 2015

Currently in our kernel we ioremap 8KB of memory for the
opregion and holds a maximum of 6KB sized RAW vbt data.

As per the latest opregion spec when the VBT size exceeds
6KB it cant be placed in the mailbox4 of the opregion, so
the physical address of the buffer where the Raw VBT is
stored will be mentioned in the mailbox3 with the VBT size
in the opregion version 2 and above.
A non-zero value here is an indication to driver that a
valid Raw VBT is stored here and driver should not refer
to mailbox4 for getting VBT. This is implemented in one
of the patches in this series.

link for the opregion spec : https://securewiki.ith.intel.com/pages/viewpage.action?pageId=48147378
(spec is under intel firewall)

In the version 3 of the MIPI sequence block, the size
field is 4 bytes so that it can support block size of
more than 64KB, but the vbt size field in the bdb header is only
2 bytes. Based on the below points this issue can be handled.
1. When the VBT is not present in the mailbox4 then VBT size
needs to be read from the mailbox3 and this VBT size field
is of 4 bytes which implies that it can be more than 64KB also.
2. If the VBT size is more than 64KB then the VBT size field
in the bdb header cant be relied. So its better to consider
the vbt size from the mailbox3 when the VBT is not present in

Other patches implements the parsing of the new sequence type
which are added in the block 53.

v2: Addressed Jani`s review comments.

Deepak M (6):
  drm/i915: Updating asle structure with new fields
  drm/i915: Parsing VBT if size of VBT exceeds 6KB
  drm/i915: Using the approprite vbt size if vbt is not in mailbox4 of
  drm/i915: extending gpio read/write to other cores
  drm/i915: Added the generic gpio sequence support and gpio table
  drm: Add few more wrapper functions for drm panel

Gaurav K Singh (1):
  drm/i915: Add functions to execute the new sequences from VBT

Uma Shankar (1):
  drm/i915: BXT GPIO support for backlight and panel control

Yogesh Mohan Marimuthu (1):
  drm/i915: GPIO for CHT generic MIPI

vkorjani (2):
  drm/i915: Adding the parsing logic for the i2c element
  drm/i915: Added support the v3 mipi sequence block

 drivers/gpu/drm/i915/i915_debugfs.c        |   24 +-
 drivers/gpu/drm/i915/i915_drv.h            |   11 +-
 drivers/gpu/drm/i915/i915_reg.h            |   28 ++
 drivers/gpu/drm/i915/intel_bios.c          |  216 +++++++-----
 drivers/gpu/drm/i915/intel_bios.h          |    9 +
 drivers/gpu/drm/i915/intel_dsi.h           |  351 +++++++++++++++++++
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c |  514 ++++++++++++++++++++++++++--
 drivers/gpu/drm/i915/intel_opregion.c      |  283 +++++----------
 drivers/gpu/drm/i915/intel_opregion.h      |  230 +++++++++++++
 drivers/gpu/drm/i915/intel_sideband.c      |    9 +-
 include/drm/drm_panel.h                    |   47 +++
 11 files changed, 1400 insertions(+), 322 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/intel_opregion.h


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