[Intel-gfx] [RFC 0/8] *** DSC Inital Design RFC ***

[vikas.korjani at intel.com]

From: vkorjani <vikas.korjani at intel.com>

s RFC is for feature Display Stream Compression (DSC) for BXT,
It is a VESA defined standard to compress and decompress image in display
streams in a link independent manner. Some of the basic requirements of
the standard are to support higher resolution on a given display link
with fewer lanes or lower rate.

DSC is architected to work in current Intel Display Engine design
without modification how current display pipeline works. DSC hardware
as per HAS is in b/n port and MIPI DSI controller. so most of the
changes are at port level.

At begining of frame display can start sending valid pixels to DSC
at normal rate, DSC start compressing this image according to
pps parameters programmed already to 8bpp, 10bpp, 12bpp.

/*This bitstream is temprory stored in output buffer and sent as byte
stream to DSI controller as soon as it is valid.
*/
Following are the set of patches as per  initial design in HLD, one
can refer DSC HLD if more details about the changes is required.

Tested these patches on fulsim simulation enviornment.


vkorjani (8):
  drm/915/bxt: Adding DSC VBT parameter and PPS structures
  drm/i915/bxt: Adding registers to support DSC
  drm/i915/bxt: Init PPS, Calculate DSI frequency and DPHY parameters
    for DSC
  drm/i915/bxt: MIPI DSI Register Programming for DSC
  drm/i915/bxt: Program MIPI_DPI_RESOLUTION for DSC
  drm/i915/bxt: Enable/Disable DSC and programme PPS.
  drm: Add support for pps and compression mode command packet
  drm/i915/bxt: Send PPS packet and compression mode command packet

 drivers/gpu/drm/drm_mipi_dsi.c             |   29 +++
 drivers/gpu/drm/i915/i915_drv.h            |    2 +
 drivers/gpu/drm/i915/i915_reg.h            |  126 +++++++++++++
 drivers/gpu/drm/i915/intel_bios.h          |   74 ++++++++
 drivers/gpu/drm/i915/intel_dsi.c           |  274 ++++++++++++++++++++++++++--
 drivers/gpu/drm/i915/intel_dsi.h           |    5 +
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c |   23 +++
 drivers/gpu/drm/i915/intel_dsi_pll.c       |   24 ++-
 include/drm/drm_mipi_dsi.h                 |    4 +-
 include/video/mipi_display.h               |    3 +
 10 files changed, 539 insertions(+), 25 deletions(-)

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1.7.9.5