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Commit d0bc8623 authored by José Roberto de Souza's avatar José Roberto de Souza Committed by Rodrigo Vivi
Browse files

drm/i915/debugfs: Print sink PSR status 



IGT tests could be improved with sink status, knowing for sure that
hardware have activate or exit PSR.

v3:
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.

Reviewed-by: default avatarDhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: default avatarJosé Roberto de Souza <jose.souza@intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180425212334.21109-3-jose.souza@intel.com
parent bc18b4df

drivers/gpu/drm/i915/i915_debugfs.c

+29 −0
Original line number Diff line number Diff line
@@ -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)) {