drm/i915: move emon functionality into intel_pm module

This moves the Ironlake energy monitoring functionality into intel_pm
module.

Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Ben Widawsky <benjamin.widawsky@intel.com>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 86 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 2f45de3339bf..832130e57731 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2492,3 +2492,89 @@ void ironlake_enable_rc6(struct drm_device *dev)
         mutex_unlock(&dev->struct_mutex);
 }
 
+static unsigned long intel_pxfreq(u32 vidfreq)
+{
+        unsigned long freq;
+        int div = (vidfreq & 0x3f0000) >> 16;
+        int post = (vidfreq & 0x3000) >> 12;
+        int pre = (vidfreq & 0x7);
+
+        if (!pre)
+                return 0;
+
+        freq = ((div * 133333) / ((1<<post) * pre));
+
+        return freq;
+}
+
+void intel_init_emon(struct drm_device *dev)
+{
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        u32 lcfuse;
+        u8 pxw[16];
+        int i;
+
+        /* Disable to program */
+        I915_WRITE(ECR, 0);
+        POSTING_READ(ECR);
+
+        /* Program energy weights for various events */
+        I915_WRITE(SDEW, 0x15040d00);
+        I915_WRITE(CSIEW0, 0x007f0000);
+        I915_WRITE(CSIEW1, 0x1e220004);
+        I915_WRITE(CSIEW2, 0x04000004);
+
+        for (i = 0; i < 5; i++)
+                I915_WRITE(PEW + (i * 4), 0);
+        for (i = 0; i < 3; i++)
+                I915_WRITE(DEW + (i * 4), 0);
+
+        /* Program P-state weights to account for frequency power adjustment */
+        for (i = 0; i < 16; i++) {
+                u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
+                unsigned long freq = intel_pxfreq(pxvidfreq);
+                unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
+                        PXVFREQ_PX_SHIFT;
+                unsigned long val;
+
+                val = vid * vid;
+                val *= (freq / 1000);
+                val *= 255;
+                val /= (127*127*900);
+                if (val > 0xff)
+                        DRM_ERROR("bad pxval: %ld\n", val);
+                pxw[i] = val;
+        }
+        /* Render standby states get 0 weight */
+        pxw[14] = 0;
+        pxw[15] = 0;
+
+        for (i = 0; i < 4; i++) {
+                u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
+                        (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
+                I915_WRITE(PXW + (i * 4), val);
+        }
+
+        /* Adjust magic regs to magic values (more experimental results) */
+        I915_WRITE(OGW0, 0);
+        I915_WRITE(OGW1, 0);
+        I915_WRITE(EG0, 0x00007f00);
+        I915_WRITE(EG1, 0x0000000e);
+        I915_WRITE(EG2, 0x000e0000);
+        I915_WRITE(EG3, 0x68000300);
+        I915_WRITE(EG4, 0x42000000);
+        I915_WRITE(EG5, 0x00140031);
+        I915_WRITE(EG6, 0);
+        I915_WRITE(EG7, 0);
+
+        for (i = 0; i < 8; i++)
+                I915_WRITE(PXWL + (i * 4), 0);
+
+        /* Enable PMON + select events */
+        I915_WRITE(ECR, 0x80000019);
+
+        lcfuse = I915_READ(LCFUSE02);
+
+        dev_priv->corr = (lcfuse & LCFUSE_HIV_MASK);
+}
+