Reads from EDP_PSR2_CTL for psr2 and reports
live state of psr2
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: vathsala nagaraju <vathsala.nagaraju@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 36 ++++++++++++++++++++++++++++++++----
drivers/gpu/drm/i915/i915_reg.h | 2 ++
2 files changed, 34 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 83f40e8..cfe238c 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2673,9 +2673,12 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
seq_printf(m, "Re-enable work scheduled: %s\n",
yesno(work_busy(&dev_priv->psr.work.work)));
- if (HAS_DDI(dev))
- enabled = I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE;
- else {
+ if (HAS_DDI(dev)) {
+ if (dev_priv->psr.psr2_support)
+ enabled = I915_READ(EDP_PSR2_CTL) & EDP_PSR2_ENABLE;
+ else
+ enabled = I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE;
+ } else {
for_each_pipe(dev_priv, pipe) {
stat[pipe] = I915_READ(VLV_PSRSTAT(pipe)) &
VLV_EDP_PSR_CURR_STATE_MASK;
@@ -2684,7 +2687,6 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
enabled = true;
}
}
-
seq_printf(m, "Main link in standby mode: %s\n",
yesno(dev_priv->psr.link_standby));
@@ -2708,6 +2710,32 @@ 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 <= EDP_PSR2_STATUS_TG_ON)
+ 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 49682f5..969d754 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3326,6 +3326,8 @@ enum {
#define EDP_PSR2_STATUS_CTL _MMIO(0x6f940)
#define EDP_PSR2_STATUS_STATE_MASK (0xf<<28)
#define EDP_PSR2_STATUS_STATE_IDLE 0
+#define EDP_PSR2_STATUS_STATE_SHIFT 28
+#define EDP_PSR2_STATUS_TG_ON 0xa
/* VGA port control */
#define ADPA _MMIO(0x61100)
--
2.7.4
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