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drm/i915/skl: Enable Gen9 RC6 

Configure and enable RC6 for Gen9.

v2: Rebase on top of BDW rc6 support (Damien)

Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Zhe Wang <zhe1.wang@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Zhe Wang 2014-11-04 17:07:05 +00:00 committed by Daniel Vetter
parent 38cff0b157
commit 20e4936693
1 changed files with 51 additions and 1 deletions
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52
drivers/gpu/drm/i915/intel_pm.c
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@ -4539,6 +4539,13 @@ static void gen8_disable_rps_interrupts(struct drm_device *dev)
I915_WRITE(GEN8_GT_IIR(2), dev_priv->pm_rps_events);
}
static void gen9_disable_rps(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
I915_WRITE(GEN6_RC_CONTROL, 0);
}
static void gen6_disable_rps_interrupts(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@ -4699,6 +4706,45 @@ static void parse_rp_state_cap(struct drm_i915_private *dev_priv, u32 rp_state_c
dev_priv->rps.min_freq_softlimit = dev_priv->rps.min_freq;
}
static void gen9_enable_rps(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_engine_cs *ring;
uint32_t rc6_mask = 0;
int unused;
/* 1a: Software RC state - RC0 */
I915_WRITE(GEN6_RC_STATE, 0);
/* 1b: Get forcewake during program sequence. Although the driver
* hasn't enabled a state yet where we need forcewake, BIOS may have.*/
gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
/* 2a: Disable RC states. */
I915_WRITE(GEN6_RC_CONTROL, 0);
/* 2b: Program RC6 thresholds.*/
I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16);
I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
for_each_ring(ring, dev_priv, unused)
I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
I915_WRITE(GEN6_RC_SLEEP, 0);
I915_WRITE(GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
/* 3a: Enable RC6 */
if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
DRM_INFO("RC6 %s\n", (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ?
"on" : "off");
I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
GEN6_RC_CTL_EI_MODE(1) |
rc6_mask);
gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
}
static void gen8_enable_rps(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@ -6233,7 +6279,9 @@ void intel_disable_gt_powersave(struct drm_device *dev)
intel_suspend_gt_powersave(dev);
mutex_lock(&dev_priv->rps.hw_lock);
if (IS_CHERRYVIEW(dev))
if (INTEL_INFO(dev)->gen >= 9)
gen9_disable_rps(dev);
else if (IS_CHERRYVIEW(dev))
cherryview_disable_rps(dev);
else if (IS_VALLEYVIEW(dev))
valleyview_disable_rps(dev);
@ -6257,6 +6305,8 @@ static void intel_gen6_powersave_work(struct work_struct *work)
cherryview_enable_rps(dev);
} else if (IS_VALLEYVIEW(dev)) {
valleyview_enable_rps(dev);
} else if (INTEL_INFO(dev)->gen >= 9) {
gen9_enable_rps(dev);
} else if (IS_BROADWELL(dev)) {
gen8_enable_rps(dev);
__gen6_update_ring_freq(dev);