diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_irq.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index a17d6bdfe63..8b35f5e1c51 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -269,6 +269,57 @@ static void i915_hotplug_work_func(struct work_struct *work) drm_sysfs_hotplug_event(dev); } +static void i915_handle_rps_change(struct drm_device *dev) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + u32 slow_up, slow_down, max_avg, min_avg; + u16 rgvswctl; + u8 new_delay = dev_priv->cur_delay; + + I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS) & ~MEMINT_EVAL_CHG); + slow_up = I915_READ(RCPREVBSYTUPAVG); + slow_down = I915_READ(RCPREVBSYTDNAVG); + max_avg = I915_READ(RCBMAXAVG); + min_avg = I915_READ(RCBMINAVG); + + /* Handle RCS change request from hw */ + if (slow_up > max_avg) { + if (dev_priv->cur_delay != dev_priv->max_delay) + new_delay = dev_priv->cur_delay - 1; + if (new_delay < dev_priv->max_delay) + new_delay = dev_priv->max_delay; + } else if (slow_down < min_avg) { + if (dev_priv->cur_delay != dev_priv->min_delay) + new_delay = dev_priv->cur_delay + 1; + if (new_delay > dev_priv->min_delay) + new_delay = dev_priv->min_delay; + } + + DRM_DEBUG("rps change requested: %d -> %d\n", + dev_priv->cur_delay, new_delay); + + rgvswctl = I915_READ(MEMSWCTL); + if (rgvswctl & MEMCTL_CMD_STS) { + DRM_ERROR("gpu slow, RCS change rejected\n"); + return; /* still slow with another command */ + } + + /* Program the new state */ + rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) | + (new_delay << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM; + I915_WRITE(MEMSWCTL, rgvswctl); + POSTING_READ(MEMSWCTL); + + rgvswctl |= MEMCTL_CMD_STS; + I915_WRITE(MEMSWCTL, rgvswctl); + + dev_priv->cur_delay = new_delay; + + DRM_DEBUG("rps changed\n"); + + return; +} + irqreturn_t ironlake_irq_handler(struct drm_device *dev) { drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; @@ -331,6 +382,11 @@ irqreturn_t ironlake_irq_handler(struct drm_device *dev) queue_work(dev_priv->wq, &dev_priv->hotplug_work); } + if (de_iir & DE_PCU_EVENT) { + I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS)); + i915_handle_rps_change(dev); + } + /* should clear PCH hotplug event before clear CPU irq */ I915_WRITE(SDEIIR, pch_iir); I915_WRITE(GTIIR, gt_iir); @@ -1064,6 +1120,13 @@ static int ironlake_irq_postinstall(struct drm_device *dev) I915_WRITE(SDEIER, dev_priv->pch_irq_enable_reg); (void) I915_READ(SDEIER); + if (IS_IRONLAKE_M(dev)) { + /* Clear & enable PCU event interrupts */ + I915_WRITE(DEIIR, DE_PCU_EVENT); + I915_WRITE(DEIER, I915_READ(DEIER) | DE_PCU_EVENT); + ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT); + } + return 0; } |