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drm/i915: Add PM interrupt details and RPS thresholds to debugfs 

When trying to determine whether RPS is working as intended, more
information is better. In particular, what interrupts are being
generated and the various thresholds for generating them.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2014-03-27 09:06:14 +00:00 committed by Daniel Vetter
parent 180b813ced
commit 0d8f94912a
1 changed files with 15 additions and 1 deletions
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16
drivers/gpu/drm/i915/i915_debugfs.c
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@ -991,6 +991,7 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
u32 rp_state_limits = I915_READ(GEN6_RP_STATE_LIMITS);
u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
u32 rpmodectl, rpinclimit, rpdeclimit;
u32 rpstat, cagf, reqf;
u32 rpupei, rpcurup, rpprevup;
u32 rpdownei, rpcurdown, rpprevdown;
@ -1011,6 +1012,10 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
reqf >>= 25;
reqf *= GT_FREQUENCY_MULTIPLIER;
rpmodectl = I915_READ(GEN6_RP_CONTROL);
rpinclimit = I915_READ(GEN6_RP_UP_THRESHOLD);
rpdeclimit = I915_READ(GEN6_RP_DOWN_THRESHOLD);
rpstat = I915_READ(GEN6_RPSTAT1);
rpupei = I915_READ(GEN6_RP_CUR_UP_EI);
rpcurup = I915_READ(GEN6_RP_CUR_UP);
@ -1027,14 +1032,23 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
mutex_unlock(&dev->struct_mutex);
seq_printf(m, "PM IER=0x%08x IMR=0x%08x ISR=0x%08x IIR=0x%08x, MASK=0x%08x\n",
I915_READ(GEN6_PMIER),
I915_READ(GEN6_PMIMR),
I915_READ(GEN6_PMISR),
I915_READ(GEN6_PMIIR),
I915_READ(GEN6_PMINTRMSK));
seq_printf(m, "GT_PERF_STATUS: 0x%08x\n", gt_perf_status);
seq_printf(m, "RPSTAT1: 0x%08x\n", rpstat);
seq_printf(m, "Render p-state ratio: %d\n",
(gt_perf_status & 0xff00) >> 8);
seq_printf(m, "Render p-state VID: %d\n",
gt_perf_status & 0xff);
seq_printf(m, "Render p-state limit: %d\n",
rp_state_limits & 0xff);
seq_printf(m, "RPSTAT1: 0x%08x\n", rpstat);
seq_printf(m, "RPMODECTL: 0x%08x\n", rpmodectl);
seq_printf(m, "RPINCLIMIT: 0x%08x\n", rpinclimit);
seq_printf(m, "RPDECLIMIT: 0x%08x\n", rpdeclimit);
seq_printf(m, "RPNSWREQ: %dMHz\n", reqf);
seq_printf(m, "CAGF: %dMHz\n", cagf);
seq_printf(m, "RP CUR UP EI: %dus\n", rpupei &