[0/5] drm/i915/dmc: firmware path handling changes

Message

Jani Nikula April 18, 2024, 2:39 p.m. UTC

We tried moving the dmc_firmware_path param from i915 to display params
before, so it would be present in xe as well as i915. This was commit
0d82a0d6f556 ("drm/i915/display: move dmc_firmware_path to display
params"). That failed, so I tried a quick fix, but that failed too
[1]. Revert followed in commit 318e82583ca9 ("Revert "drm/i915/display:
move dmc_firmware_path to display params"").

Do some refactoring and prep work first, with the most significant
change being the removal of special handling of
i915.dmc_firmware_path="" to disable DMC. This will now lead to the
platform default firmware being used.

To disable DMC and runtime PM, you'll need to specify a non-existent
file instead. There's no "magic" name specified for that.

BR,
Jani.



[1] https://lore.kernel.org/r/[e-mail]

Jani Nikula (5):
  drm/i915/dmc: handle request_firmware() errors separately
  drm/i915/dmc: improve firmware parse failure propagation
  drm/i915/dmc: split out per-platform firmware path selection
  drm/i915/dmc: change meaning of dmc_firmware_path="" module param
  drm/i915/display: move dmc_firmware_path to display params

 .../drm/i915/display/intel_display_params.c   |   4 +
 .../drm/i915/display/intel_display_params.h   |   1 +
 drivers/gpu/drm/i915/display/intel_dmc.c      | 162 ++++++++++--------
 drivers/gpu/drm/i915/i915_params.c            |   3 -
 drivers/gpu/drm/i915/i915_params.h            |   1 -
 drivers/gpu/drm/xe/xe_device_types.h          |   3 -
 6 files changed, 98 insertions(+), 76 deletions(-)