From d0bc86231a55d72860ac3a07a0f676fc18f2dd9d Mon Sep 17 00:00:00 2001 From: =?utf8?q?Jos=C3=A9=20Roberto=20de=20Souza?= Date: Wed, 25 Apr 2018 14:23:33 -0700 Subject: [PATCH] drm/i915/debugfs: Print sink PSR status MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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: Dhinakaran Pandiyan Cc: Rodrigo Vivi Signed-off-by: José Roberto de Souza Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20180425212334.21109-3-jose.souza@intel.com --- 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 1c88805..cb1a804 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)) { -- 2.7.4