On 14/09/2017 21:36, Ville Syrjälä wrote:
On Mon, Sep 11, 2017 at 04:25:50PM +0100, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Extract code from i915_energy_uJ (debugfs) so it can be used by
other callers in future patches.
v2: Rebase.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 17 +----------------
drivers/gpu/drm/i915/i915_drv.h | 2 ++
drivers/gpu/drm/i915/intel_pm.c | 25 +++++++++++++++++++++++++
3 files changed, 28 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 6338018f655d..b3a4a66bf7c4 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2780,26 +2780,11 @@ static int i915_sink_crc(struct seq_file *m, void *data)
static int i915_energy_uJ(struct seq_file *m, void *data)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
- unsigned long long power;
- u32 units;
if (INTEL_GEN(dev_priv) < 6)
return -ENODEV;
- intel_runtime_pm_get(dev_priv);
-
- if (rdmsrl_safe(MSR_RAPL_POWER_UNIT, &power)) {
- intel_runtime_pm_put(dev_priv);
- return -ENODEV;
- }
-
- units = (power & 0x1f00) >> 8;
- power = I915_READ(MCH_SECP_NRG_STTS);
- power = (1000000 * power) >> units; /* convert to uJ */
-
- intel_runtime_pm_put(dev_priv);
-
- seq_printf(m, "%llu", power);
+ seq_printf(m, "%llu", intel_energy_uJ(dev_priv));
Isn't this the same thing as the package energy you get from rapl? Can't
we just nuke this private implementation entirely and rely on whatever
rapl gives us?
If so I think we could leave it out of i915 PMU. I tried looking for
MCH_SECP_NRG_STTS in bspec but did not find it though? Is your bspec fu
perhaps better and you could have a look?
I can also compare the outputs of the two and see if they are one and
the same that way.
Regards,
Tvrtko
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