[v4,0/4] drm/i915/display: DMC wakelock implementation

Message

Luca Coelho April 4, 2024, 11:41 a.m. UTC

Hi,

This is the sixth version of my series, the fourth as a proper
patchset.

These are the changes:

In v4:
   * removed the call to init from the first patch (gets added later);
   * added a flag to check if the wakelock is taken in DMC, so we
     don't try to take it again if get() is called while the work is
     queued;
   * changed the copyright year to 2024;
   * added __intel_dmc_wl_supported() to make checks easier;
   * check if supported also on init;
   * check if DMC is loaded before enabling;
   * removed a couple of stray debugging messages.

In v3:
   * Fixed some checkpatch issues.

In v2:
  * Enable/disable the wakelocks on DC5-6 entry and exit instead of on
    DMC load and unload;
  * Added bspec link to the commit message;
  * A bunch of other small changes;
  * For the complete list of changes and discussions, please look at
    the patchset in patchwork:
    https://patchwork.freedesktop.org/series/128628/

Please review.

Cheers,
Luca.


Luca Coelho (4):
  drm/i915/display: add support for DMC wakelocks
  drm/i915/display: don't allow DMC wakelock on older hardware
  drm/i915/display: add module parameter to enable DMC wakelock
  drm/i915/display: tie DMC wakelock to DC5/6 state transitions

 drivers/gpu/drm/i915/Makefile                 |   1 +
 drivers/gpu/drm/i915/display/intel_de.h       |  97 ++++++-
 .../gpu/drm/i915/display/intel_display_core.h |   2 +
 .../drm/i915/display/intel_display_driver.c   |   1 +
 .../drm/i915/display/intel_display_params.c   |   5 +
 .../drm/i915/display/intel_display_params.h   |   1 +
 .../i915/display/intel_display_power_well.c   |   7 +
 drivers/gpu/drm/i915/display/intel_dmc.c      |   4 +
 drivers/gpu/drm/i915/display/intel_dmc_regs.h |   6 +
 drivers/gpu/drm/i915/display/intel_dmc_wl.c   | 266 ++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_dmc_wl.h   |  31 ++
 drivers/gpu/drm/xe/Makefile                   |   1 +
 12 files changed, 414 insertions(+), 8 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/display/intel_dmc_wl.c
 create mode 100644 drivers/gpu/drm/i915/display/intel_dmc_wl.h