From c0a6aa7ec2c365a44ec8eb6e9b23f1f51ad386ed Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 2 Oct 2018 12:32:21 +0100 Subject: [PATCH] drm/i915: Show actual alongside requested frequency in debugfs/i915_rps_boost_info Previously we hesitated in adding the hw probe for the actual GPU frequency for rps_boost as it is quite cumbersome, but given some surprising HW behaviour it would be useful to know both the RPS boost state and the actual HW state in one location. v2: vlv/chv needs more tlc Reported-by: Tomi Sarvela Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Reviewed-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20181002113221.29208-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_debugfs.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index b4744a6..f42e93b 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2215,8 +2215,23 @@ static int i915_rps_boost_info(struct seq_file *m, void *data) struct drm_i915_private *dev_priv = node_to_i915(m->private); struct drm_device *dev = &dev_priv->drm; struct intel_rps *rps = &dev_priv->gt_pm.rps; + u32 act_freq = rps->cur_freq; struct drm_file *file; + if (intel_runtime_pm_get_if_in_use(dev_priv)) { + if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { + mutex_lock(&dev_priv->pcu_lock); + act_freq = vlv_punit_read(dev_priv, + PUNIT_REG_GPU_FREQ_STS); + act_freq = (act_freq >> 8) & 0xff; + mutex_unlock(&dev_priv->pcu_lock); + } else { + act_freq = intel_get_cagf(dev_priv, + I915_READ(GEN6_RPSTAT1)); + } + intel_runtime_pm_put(dev_priv); + } + seq_printf(m, "RPS enabled? %d\n", rps->enabled); seq_printf(m, "GPU busy? %s [%d requests]\n", yesno(dev_priv->gt.awake), dev_priv->gt.active_requests); @@ -2224,8 +2239,9 @@ static int i915_rps_boost_info(struct seq_file *m, void *data) seq_printf(m, "Boosts outstanding? %d\n", atomic_read(&rps->num_waiters)); seq_printf(m, "Interactive? %d\n", READ_ONCE(rps->power.interactive)); - seq_printf(m, "Frequency requested %d\n", - intel_gpu_freq(dev_priv, rps->cur_freq)); + seq_printf(m, "Frequency requested %d, actual %d\n", + intel_gpu_freq(dev_priv, rps->cur_freq), + intel_gpu_freq(dev_priv, act_freq)); seq_printf(m, " min hard:%d, soft:%d; max soft:%d, hard:%d\n", intel_gpu_freq(dev_priv, rps->min_freq), intel_gpu_freq(dev_priv, rps->min_freq_softlimit), -- 2.7.4