[Intel-gfx] [PATCH v2 4/6] drm/i915/psr: Do not print last attempted entry or exit in PSR debugfs while in PSR2

[José Roberto de Souza]

PSR2 only trigger interruptions for AUX error, so let's not print
useless information in debugfs.
Also adding a comment to intel_psr_irq_handler() about that.

v2: Warning and not letting user set PSR_DEBUG_IRQ when PSR2 is
enabled(Dhinakaran)

Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 6 +++++-
 drivers/gpu/drm/i915/intel_psr.c    | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 77b097b50fd5..5ebf0e647ac7 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2621,7 +2621,7 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
 		seq_printf(m, "Performance counter: %u\n", val);
 	}
 
-	if (psr->debug & I915_PSR_DEBUG_IRQ) {
+	if ((psr->debug & I915_PSR_DEBUG_IRQ) && !psr->psr2_enabled) {
 		seq_printf(m, "Last attempted entry at: %lld\n",
 			   psr->last_entry_attempt);
 		seq_printf(m, "Last exit at: %lld\n", psr->last_exit);
@@ -2676,6 +2676,10 @@ i915_edp_psr_debug_set(void *data, u64 val)
 skip_mode:
 	if (!ret) {
 		mutex_lock(&dev_priv->psr.lock);
+		if (dev_priv->psr.psr2_enabled && (val & I915_PSR_DEBUG_IRQ)) {
+			val &= ~I915_PSR_DEBUG_IRQ;
+			DRM_WARN("PSR debug IRQ cannot be enabled with PSR2");
+		}
 		dev_priv->psr.debug = val;
 		intel_psr_irq_control(dev_priv, dev_priv->psr.debug);
 		mutex_unlock(&dev_priv->psr.lock);
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index bba4f7da68b3..a875546880fa 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -201,6 +201,7 @@ void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir)
 			mask |= EDP_PSR_ERROR(shift);
 		}
 
+		/* PSR2 don't trigger PRE_ENTRY and POST_EXIT interruptions */
 		if (psr_iir & EDP_PSR_PRE_ENTRY(shift)) {
 			dev_priv->psr.last_entry_attempt = time_ns;
 			DRM_DEBUG_KMS("[transcoder %s] PSR entry attempt in 2 vblanks\n",
-- 
2.20.0