From 7648fa99eb77a2e1a90b7beaa420e07d819b9c11 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 20 May 2010 14:28:11 -0700 Subject: drm/i915: add power monitoring support Add power monitoring support to the i915 driver for use by the IPS driver. Export the available power info to the IPS driver through a few new inter-driver hooks. When used together, the IPS driver and this patch can significantly increase graphics performance on Ironlake class chips. Signed-off-by: Jesse Barnes [anholt: Fixed 32-bit compile. stupid obfuscating div_u64()] Signed-off-by: Eric Anholt --- drivers/gpu/drm/i915/i915_irq.c | 28 ++++------------------------ 1 file changed, 4 insertions(+), 24 deletions(-) (limited to 'drivers/gpu/drm/i915/i915_irq.c') diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 0a3a5806a12e..b5dba4795f6f 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -278,10 +278,9 @@ static void i915_handle_rps_change(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; u32 busy_up, busy_down, max_avg, min_avg; - u16 rgvswctl; u8 new_delay = dev_priv->cur_delay; - I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS) & ~MEMINT_EVAL_CHG); + I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG); busy_up = I915_READ(RCPREVBSYTUPAVG); busy_down = I915_READ(RCPREVBSYTDNAVG); max_avg = I915_READ(RCBMAXAVG); @@ -300,27 +299,8 @@ static void i915_handle_rps_change(struct drm_device *dev) 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 busy, RCS change rejected\n"); - return; /* still busy 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"); + if (ironlake_set_drps(dev, new_delay)) + dev_priv->cur_delay = new_delay; return; } @@ -392,7 +372,7 @@ irqreturn_t ironlake_irq_handler(struct drm_device *dev) } if (de_iir & DE_PCU_EVENT) { - I915_WRITE(MEMINTRSTS, I915_READ(MEMINTRSTS)); + I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS)); i915_handle_rps_change(dev); } -- cgit