[Intel-gfx] [PATCH v4 5/7] drm/i915/psr: Remove main link standby mode from debugfs

[José Roberto de Souza]

Main link stand by is only valid for PSR1 as it is not possible to
enable PSR2 and keep main link on but even for PSR1 it is not useful
information and it can be removed without any drawbacks.
But if someone still wants to check that this patch is providing the
full PSR_CTL register value so user can check if bit 27 is set, this
will also expose more information about how PSR1 and PSR2 was
configured in source.

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
Suggested-by: 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 | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index f42e93b71e67..48e65becd035 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2712,8 +2712,8 @@ psr_source_status(struct drm_i915_private *dev_priv, struct seq_file *m)
 static int i915_edp_psr_status(struct seq_file *m, void *data)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
-	u32 psrperf = 0;
-	bool enabled = false;
+	u32 val;
+	bool enabled;
 	bool sink_support;
 
 	if (!HAS_PSR(dev_priv))
@@ -2733,24 +2733,23 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
 	seq_printf(m, "Busy frontbuffer bits: 0x%03x\n",
 		   dev_priv->psr.busy_frontbuffer_bits);
 
-	if (dev_priv->psr.psr2_enabled)
-		enabled = I915_READ(EDP_PSR2_CTL) & EDP_PSR2_ENABLE;
-	else
-		enabled = I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE;
-
-	seq_printf(m, "Main link in standby mode: %s\n",
-		   yesno(dev_priv->psr.link_standby));
+	if (dev_priv->psr.psr2_enabled) {
+		val = I915_READ(EDP_PSR2_CTL);
+		enabled = val & EDP_PSR2_ENABLE;
+	} else {
+		val = I915_READ(EDP_PSR_CTL);
+		enabled = val & EDP_PSR_ENABLE;
+	}
 
-	seq_printf(m, "HW Enabled & Active bit: %s\n", yesno(enabled));
+	seq_printf(m, "HW enabled: %s [0x%x]\n", yesno(enabled), val);
 
 	/*
 	 * SKL+ Perf counter is reset to 0 everytime DC state is entered
 	 */
 	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		psrperf = I915_READ(EDP_PSR_PERF_CNT) &
-			EDP_PSR_PERF_CNT_MASK;
+		val = I915_READ(EDP_PSR_PERF_CNT) & EDP_PSR_PERF_CNT_MASK;
 
-		seq_printf(m, "Performance_Counter: %u\n", psrperf);
+		seq_printf(m, "Performance_Counter: %u\n", val);
 	}
 
 	psr_source_status(dev_priv, m);
-- 
2.19.0