IGT tests could be improved with sink status, knowing for sure that
hardware have activate or exit PSR.
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
No changes since v2, Dhinakaran asked to not merge this patch in v2
because reading i915_edp_psr_status was causing PSR to exit but now
with 'drm/i915/psr: Prevent PSR exit when a non-pipe related register
is written' it is fixed.
drivers/gpu/drm/i915/i915_debugfs.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 2f05f5262bba..536d93322451 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2603,6 +2603,26 @@ static const char *psr2_live_status(u32 val)
return "unknown";
}
+static const char *psr_sink_status(u8 val)
+{
+ static const char * const sink_status[] = {
+ "inactive",
+ "transition to active, capture and display",
+ "active, display from RFB",
+ "active, capture and display on sink device timings",
+ "transition to inactive, capture and display, timing re-sync",
+ "reserved",
+ "reserved",
+ "sink internal error"
+ };
+
+ val &= DP_PSR_SINK_STATE_MASK;
+ if (val < ARRAY_SIZE(sink_status))
+ return sink_status[val];
+
+ return "unknown";
+}
+
static int i915_edp_psr_status(struct seq_file *m, void *data)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
@@ -2684,6 +2704,15 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
seq_printf(m, "EDP_PSR2_STATUS: %x [%s]\n",
psr2, psr2_live_status(psr2));
}
+
+ if (dev_priv->psr.enabled) {
+ struct drm_dp_aux *aux = &dev_priv->psr.enabled->aux;
+ u8 val;
+
+ if (drm_dp_dpcd_readb(aux, DP_PSR_STATUS, &val) == 1)
+ seq_printf(m, "Sink PSR status: 0x%x [%s]\n", val,
+ psr_sink_status(val));
+ }
mutex_unlock(&dev_priv->psr.lock);
if (READ_ONCE(dev_priv->psr.debug)) {
--
2.17.0
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