[Intel-gfx] [PATCH 00/10] enable psr2 for idle_screen on y-cordinate panel

[vathsala nagaraju]

This series enables psr2 on idle on screen for y cordinate panel.
Code is tested on sharp 32X18 edp 1.4 y cordinate enabled panel.
if system enters psr2, the system must go to deep sleep state.
Can be verifed by checking  psr2_status register bit 31:28.
DEEP_SLEEP[value 8]  must be entered while in idle on screen with psr2 
panel.

PSR1 and PSR2 are mutually exclusive.
In the current code, when PSR2 is enabled , psr1 is also enabled,
and for psr2 the status is read from psr1 registers, leading to 
blank screen.
1-3: Fixes vsc header programming for psr2 as per edp1.4 a
     table 6-11 and  blank screen issue for psr2 panel.     
4-5: Enables alpm and disables aux frame sync , need for psr2.
6-7: Progarms CHICKEN_TRANS and PSR_MASK for deep sleep state, as per bspec
8:   Psr2 is enabled only for y cordinate enabled psr2 panel.
     this restriction will be removed after adding gtc support.
9-10: Adds debug support for psr2.It also enables reading of 
     EDP_PSR_PERF_CNT on skl+ platforms, when dc6 is disabled through
     kernel parameter i915.enable_dc=0

Vathsala Nagaraju (10):
  drm : adds Y-coordinate and Colorimetry Format
  drm/i915/psr: program vsc header for psr2
  drm/i915/psr: fix blank screen issue for psr2
  drm/i915/psr: disable aux_frame_sync on psr2 exit
  drm/i915/psr: enable ALPM for psr2
  drm/i915/psr: set CHICKEN_TRANS for psr2
  drm/i915/psr: set PSR_MASK bits for deep sleep
  drm/i915/psr: enable psr2 for y cordinate panels
  drm/i915/psr: report live PSR2 State
  drm/i915/psr: EDP_PSR_PERF_CNT not valid for psr2

 drivers/gpu/drm/i915/i915_debugfs.c |  38 ++++++-
 drivers/gpu/drm/i915/i915_drv.h     |   3 +
 drivers/gpu/drm/i915/i915_reg.h     |  19 ++++
 drivers/gpu/drm/i915/intel_dp.c     |  35 +++++++
 drivers/gpu/drm/i915/intel_psr.c    | 199 ++++++++++++++++++++++++++++--------
 include/drm/drm_dp_helper.h         |  13 ++-
 6 files changed, 263 insertions(+), 44 deletions(-)

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1.9.1