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drm/i915: Index the ring frequency table by HW frequency range 

When reporting the frequency table stored in the punit, report the full
range and not just the user restricted frequency range. In the process
keep the code to set the frequency table and read it the same.

v3: As we haven't separated the sb_lock from the pcu_lock yet, there's a
cycle between the pcu_lock and intel_runtime_pm_get.

References: f936ec34de ("drm/i915/skl: Updated the i915_ring_freq_table debugfs function")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20180308142648.4016-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-03-08 14:26:48 +00:00
parent 59cd31f177
commit d586b5f4cf
2 changed files with 10 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -1796,9 +1796,9 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
struct intel_rps *rps = &dev_priv->gt_pm.rps;
int ret = 0;
int gpu_freq, ia_freq;
unsigned int max_gpu_freq, min_gpu_freq;
int gpu_freq, ia_freq;
int ret;
if (!HAS_LLC(dev_priv))
return -ENODEV;
@ -1809,13 +1809,12 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
if (ret)
goto out;
min_gpu_freq = rps->min_freq;
max_gpu_freq = rps->max_freq;
if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
/* Convert GT frequency to 50 HZ units */
min_gpu_freq = rps->min_freq_softlimit / GEN9_FREQ_SCALER;
max_gpu_freq = rps->max_freq_softlimit / GEN9_FREQ_SCALER;
} else {
min_gpu_freq = rps->min_freq_softlimit;
max_gpu_freq = rps->max_freq_softlimit;
min_gpu_freq /= GEN9_FREQ_SCALER;
max_gpu_freq /= GEN9_FREQ_SCALER;
}
seq_puts(m, "GPU freq (MHz)\tEffective CPU freq (MHz)\tEffective Ring freq (MHz)\n");

9
drivers/gpu/drm/i915/intel_pm.c
View File

@ -6918,13 +6918,12 @@ static void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
/* convert DDR frequency from units of 266.6MHz to bandwidth */
min_ring_freq = mult_frac(min_ring_freq, 8, 3);
min_gpu_freq = rps->min_freq;
max_gpu_freq = rps->max_freq;
if (IS_GEN9_BC(dev_priv) || IS_CANNONLAKE(dev_priv)) {
/* Convert GT frequency to 50 HZ units */
min_gpu_freq = rps->min_freq / GEN9_FREQ_SCALER;
max_gpu_freq = rps->max_freq / GEN9_FREQ_SCALER;
} else {
min_gpu_freq = rps->min_freq;
max_gpu_freq = rps->max_freq;
min_gpu_freq /= GEN9_FREQ_SCALER;
max_gpu_freq /= GEN9_FREQ_SCALER;
}
/*