Reviewed-by: Rodrigo Vivi rodrigo.vivi@intel.com

On Fri, 2017-01-06 at 22:02 +0530, vathsala nagaraju wrote:

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

---

drivers/gpu/drm/i915/i915_debugfs.c | 24 ++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 9d7b5a8..ec9013e 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2606,6 +2606,30 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)

seq_printf(m, "Performance_Counter: %u\n", psrperf);

}

• if (dev_priv->psr.psr2_support) {

• static const char * const live_status[] = {
  

• 					"IDLE",
  

• 					"CAPTURE",
  

• 					"CAPTURE_FS",
  

• 					"SLEEP",
  

• 					"BUFON_FW",
  

• 					"ML_UP",
  

• 					"SU_STANDBY",
  

• 					"FAST_SLEEP",
  

• 					"DEEP_SLEEP",
  

• 					"BUF_ON",
  

• 					"TG_ON" };
  

• u8 pos = (I915_READ(EDP_PSR2_STATUS_CTL) &
  

• 	EDP_PSR2_STATUS_STATE_MASK) >>
  

• 	EDP_PSR2_STATUS_STATE_SHIFT;
  

• seq_printf(m, "PSR2_STATUS_EDP: %x\n",
  

• 	I915_READ(EDP_PSR2_STATUS_CTL));
  

• if (pos < ARRAY_SIZE(live_status))
  

• seq_printf(m, "PSR2 live state %s\n",
  

• 	live_status[pos]);
  

• } mutex_unlock(&dev_priv->psr.lock);

  intel_runtime_pm_put(dev_priv);

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 272a283..65fffc5 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3621,6 +3621,7 @@ enum {

#define EDP_PSR2_STATUS_CTL _MMIO(0x6f940) #define EDP_PSR2_STATUS_STATE_MASK (0xf<<28) +#define EDP_PSR2_STATUS_STATE_SHIFT 28

/* VGA port control */ #define ADPA _MMIO(0x61100)