[v2,0/3] Tegra DRM: Support memory bandwidth management for display

Message

Dmitry Osipenko May 24, 2019, 6:16 p.m. UTC

Hello,

Display controllers have a need for minimum memory bandwidth in order to
maintain data-stream to output at a required rate. There is a visual
corruption once the requirement is violated and CRTC reset may be required
in order to recover. This series adds preliminary support for the memory
bandwidth management, it will become active once Memory Controller drivers
will get support for the PM memory bandwidth QoS.

Changelog:

v2: The total size of framebuffer is now calculated more accurately for
    planar formats, taking into account chroma sub-sampling.

Dmitry Osipenko (3):
  drm/tegra: dc: Tune up high priority request controls on Tegra20
  drm/tegra: dc: Extend debug stats with total number of events
  drm/tegra: Support PM QoS memory bandwidth management

 drivers/gpu/drm/tegra/dc.c    | 250 +++++++++++++++++++++++++++++++++-
 drivers/gpu/drm/tegra/dc.h    |  13 ++
 drivers/gpu/drm/tegra/drm.c   |  18 +++
 drivers/gpu/drm/tegra/plane.c |   1 +
 drivers/gpu/drm/tegra/plane.h |   4 +-
 5 files changed, 280 insertions(+), 6 deletions(-)