[PATCH 84/89] drm/i915/skl: add turbo support

Damien Lespiau
2014-09-04T11:29:20Z

From: Jesse Barnes <jbarnes@virtuousgeek.org>

Per latest PM programming guide.

v2: the wrong flavour of the function updating the ring frequency was
called, leading to dead locks (Tvrtko)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index ff0d8cb..9e9377a 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4708,9 +4708,36 @@ void bdw_software_turbo(struct drm_device *dev)
&current_time, &current_c0);
}

+/* See the Gen9_GT_PM_Programming_Guide doc for the below */
static void gen9_enable_rps(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+
+ gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
+
+ I915_WRITE(GEN6_RPNSWREQ, 0xc800000);
+ I915_WRITE(GEN6_RC_VIDEO_FREQ, 0xc800000);
+
+ I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 0xf4240);
+ I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, 0x12060000);
+ I915_WRITE(GEN6_RP_UP_THRESHOLD, 0xe808);
+ I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 0x3bd08);
+ I915_WRITE(GEN6_RP_UP_EI, 0x101d0);
+ I915_WRITE(GEN6_RP_DOWN_EI, 0x55730);
+ I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 0xa);
+ I915_WRITE(GEN6_PMINTRMSK, 0x6);
+ I915_WRITE(GEN6_RP_CONTROL, GEN6_RP_MEDIA_TURBO |
+ GEN6_RP_MEDIA_HW_MODE | GEN6_RP_ENABLE |
+ GEN6_RP_UP_BUSY_AVG | GEN6_RP_DOWN_IDLE_AVG);
+
+ gen8_enable_rps_interrupts(dev);
+
+ gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void gen9_enable_rc6(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;
@@ -6355,7 +6382,9 @@ static void intel_gen6_powersave_work(struct work_struct *work)
} else if (IS_VALLEYVIEW(dev)) {
valleyview_enable_rps(dev);
} else if (INTEL_INFO(dev)->gen >= 9) {
+ gen9_enable_rc6(dev);
gen9_enable_rps(dev);
+ __gen6_update_ring_freq(dev);
} else if (IS_BROADWELL(dev)) {
gen8_enable_rps(dev);
__gen6_update_ring_freq(dev);
--
1.8.3.1