drm/i915/display: Allow users to disable PSR2
authorJosé Roberto de Souza <jose.souza@intel.com>
Thu, 24 Feb 2022 20:25:23 +0000 (12:25 -0800)
committerJosé Roberto de Souza <jose.souza@intel.com>
Thu, 3 Mar 2022 13:50:47 +0000 (05:50 -0800)
commit9c95f96392d99e5915838e0ca83b25bad3f93e3c
treed153126ac7d948e102cf6187add8beefba2b456d
parent8d5516d18b323cf7274d1cf5fe76f4a691f879c6
drm/i915/display: Allow users to disable PSR2

Some users are suffering with PSR2 issues that are under debug or
issues that were root caused to panel firmware bugs, to make life of
those users easier here adding a option to disable PSR2 with kernel
parameters so they can still benefit from PSR1 power savings.

Using the same enable_psr that is current used to turn the whole
feature on or off and allowing user to select up to what PSR version
it should enable.
Right now users only set this parameter to 0 when they want to disable
PSR1 and PSR2 or don't add it at all leaving it to per-chip behavior
so it should not cause a bad impact on users.

v2:
- changing enable_psr values (Ville and Rodrigo)

Link: https://gitlab.freedesktop.org/drm/intel/-/issues/4951
Cc: Jouni Högander <jouni.hogander@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220224202523.993560-1-jose.souza@intel.com
drivers/gpu/drm/i915/display/intel_psr.c
drivers/gpu/drm/i915/i915_params.c