[Intel-gfx] [RFC 00/14] DSI Command mode(DBI mode) enabling on CHT

[Gaurav K Singh]

Hi,

These set of patches are for enabling DSI command mode. Command Mode refers to
an operation in which transactions primarily take the form of sending commands
and data to a peripheral that incorporates a display controller. The display
controller may include local registers and a frame buffer. The host processor
indirectly controls activity at the peripheral by sending commands, parameters
and data to the display controller.

Sink refreshes from its local frame buffer. Image updates require Source to write
new data into the frame buffer which Source sends in the form of command + payload.

The command mode panel we have here is 1080 x 1920. For this panel, features like support of
i2c transactions for sending backlight on sequence, VBT version 3 patches, GPIO configuration
changes for CHT are required. The same will be added as part of different patch series.
Floating the command mode patches separately to start with the initial review.

Regards
Gaurav

Gaurav K Singh (14):
  drm/i915: allocate gem memory for mipi dbi cmd buffer
  drm/i915: Add support for TEAR ON Sequence
  drm/i915: Add functions for dcs memory write cmd
  drm/i915: Calculate bw timer for mipi DBI interface
  drm/i915: Use the bpp value wrt the pixel format
  drm/i915: Disable vlank interrupt for disabling MIPI cmd mode
  drm/i915: Disable MIPI display self refresh mode
  drm/i915: Disable Tearing effect trigger by GPIO pin
  drm/i915: Changes for command mode preparation
  drm/i915: Enable Tearing effect trigger by GPIO pin
  drm/i915: Enable MIPI display self refresh mode
  drm/i915: Generalize DSI enable function
  drm/i915: Reset the display hw if vid mode to cmd mode
  drm/i915: send one frame after enabling mipi cmd mode

 drivers/gpu/drm/i915/i915_drv.h            |    1 +
 drivers/gpu/drm/i915/i915_reg.h            |    1 +
 drivers/gpu/drm/i915/intel_bios.h          |    4 +
 drivers/gpu/drm/i915/intel_display.c       |  155 ++++++++++++++++++++++++----
 drivers/gpu/drm/i915/intel_drv.h           |    7 ++
 drivers/gpu/drm/i915/intel_dsi.c           |  136 +++++++++++++++++++++---
 drivers/gpu/drm/i915/intel_dsi.h           |    5 +
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c |   36 ++++++-
 8 files changed, 311 insertions(+), 34 deletions(-)

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1.7.9.5