drm/i915: Report requested frequency alongside current frequency in debugfs

It can be useful to compare at times the current vs requested frequency
of the GPU, so provide the contents of RPNSWREQ alonside CAGF.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 55ab9246e1b97c77d3e4a82acdbf04e2c904881f..a6f4cb5af18529308096b827bd50b68b94181f79 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -857,7 +857,7 @@ 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 rpstat, cagf;
+               u32 rpstat, cagf, reqf;
                u32 rpupei, rpcurup, rpprevup;
                u32 rpdownei, rpcurdown, rpprevdown;
                int max_freq;
@@ -869,6 +869,14 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
 
                gen6_gt_force_wake_get(dev_priv);
 
+               reqf = I915_READ(GEN6_RPNSWREQ);
+               reqf &= ~GEN6_TURBO_DISABLE;
+               if (IS_HASWELL(dev))
+                       reqf >>= 24;
+               else
+                       reqf >>= 25;
+               reqf *= GT_FREQUENCY_MULTIPLIER;
+
                rpstat = I915_READ(GEN6_RPSTAT1);
                rpupei = I915_READ(GEN6_RP_CUR_UP_EI);
                rpcurup = I915_READ(GEN6_RP_CUR_UP);
@@ -893,6 +901,7 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
                           gt_perf_status & 0xff);
                seq_printf(m, "Render p-state limit: %d\n",
                           rp_state_limits & 0xff);
+               seq_printf(m, "RPNSWREQ: %dMHz\n", reqf);
                seq_printf(m, "CAGF: %dMHz\n", cagf);
                seq_printf(m, "RP CUR UP EI: %dus\n", rpupei &
                           GEN6_CURICONT_MASK);