drm/i915: tune Sandy Bridge DRPS constants
These make us increase our frequency much more readily, and decrease
them only after significant idle time, resulting in a 20% performance
increase for nexuiz.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index c31e818..5825a58 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -862,19 +862,44 @@
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 rpstat;
+ u32 rpupei, rpcurup, rpprevup;
+ u32 rpdownei, rpcurdown, rpprevdown;
int max_freq;
/* RPSTAT1 is in the GT power well */
__gen6_force_wake_get(dev_priv);
+ rpstat = I915_READ(GEN6_RPSTAT1);
+ rpupei = I915_READ(GEN6_RP_CUR_UP_EI);
+ rpcurup = I915_READ(GEN6_RP_CUR_UP);
+ rpprevup = I915_READ(GEN6_RP_PREV_UP);
+ rpdownei = I915_READ(GEN6_RP_CUR_DOWN_EI);
+ rpcurdown = I915_READ(GEN6_RP_CUR_DOWN);
+ rpprevdown = I915_READ(GEN6_RP_PREV_DOWN);
+
seq_printf(m, "GT_PERF_STATUS: 0x%08x\n", gt_perf_status);
- seq_printf(m, "RPSTAT1: 0x%08x\n", I915_READ(GEN6_RPSTAT1));
+ 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, "CAGF: %dMHz\n", ((rpstat & GEN6_CAGF_MASK) >>
+ GEN6_CAGF_SHIFT) * 100);
+ seq_printf(m, "RP CUR UP EI: %dus\n", rpupei &
+ GEN6_CURICONT_MASK);
+ seq_printf(m, "RP CUR UP: %dus\n", rpcurup &
+ GEN6_CURBSYTAVG_MASK);
+ seq_printf(m, "RP PREV UP: %dus\n", rpprevup &
+ GEN6_CURBSYTAVG_MASK);
+ seq_printf(m, "RP CUR DOWN EI: %dus\n", rpdownei &
+ GEN6_CURIAVG_MASK);
+ seq_printf(m, "RP CUR DOWN: %dus\n", rpcurdown &
+ GEN6_CURBSYTAVG_MASK);
+ seq_printf(m, "RP PREV DOWN: %dus\n", rpprevdown &
+ GEN6_CURBSYTAVG_MASK);
max_freq = (rp_state_cap & 0xff0000) >> 16;
seq_printf(m, "Lowest (RPN) frequency: %dMHz\n",