drm/i915/psr: report live PSR2 State
authorNagaraju, Vathsala <vathsala.nagaraju@intel.com>
Fri, 6 Jan 2017 16:32:32 +0000 (22:02 +0530)
committerRodrigo Vivi <rodrigo.vivi@intel.com>
Fri, 13 Jan 2017 18:47:30 +0000 (10:47 -0800)
commit6ba1f9e1772f3ff9dc18e81fc01fa97c059b1d06
tree54c060730a5297150e27e845a00cf0b21337c22c
parent18b9bf3ee5a4fcce8b284a1bd4ddb593f1397daa
drm/i915/psr: report live PSR2 State

Reports  live state of PSR2 form PSR2_STATUS register.
bit field 31:28 gives the live state of PSR2.
It can be used to check if system is in deep sleep,
selective update or selective update standby.
During video play back, we can use this to check
if system is entering SU mode or not.
when system is in idle state, DEEP_SLEEP(8) must be entered.
When video playback is happening, system must be in
SLEEP(3 / selective update) or SU_STANDBY( 6 / selective update standby)

v2: (Rodrigo)
- Remove EDP_PSR2_STATUS_TG_ON=a ,instead use ARRAY_SIZE

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Vathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: Patil Deepti <deepti.patil@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1483720352-24761-1-git-send-email-vathsala.nagaraju@intel.com
drivers/gpu/drm/i915/i915_debugfs.c
drivers/gpu/drm/i915/i915_reg.h