Commit 773ea9a8 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Perform static RPS frequency setup before userspace 



As these RPS frequency values are part of our userspace interface, they
must be established before that userspace interface is registered.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468397438-21226-3-git-send-email-chris@chris-wilson.co.uk
parent 3a45b05c

drivers/gpu/drm/i915/intel_pm.c

+31 −67
Original line number Diff line number Diff line
@@ -5102,35 +5102,31 @@ int sanitize_rc6_option(struct drm_i915_private *dev_priv, int enable_rc6) 


static void gen6_init_rps_frequencies(struct drm_i915_private *dev_priv)

{

	uint32_t rp_state_cap;

	u32 ddcc_status = 0;

	int ret;



	/* All of these values are in units of 50MHz */

	dev_priv->rps.cur_freq		= 0;



	/* static values from HW: RP0 > RP1 > RPn (min_freq) */

	if (IS_BROXTON(dev_priv)) {

		rp_state_cap = I915_READ(BXT_RP_STATE_CAP);

		u32 rp_state_cap = I915_READ(BXT_RP_STATE_CAP);

		dev_priv->rps.rp0_freq = (rp_state_cap >> 16) & 0xff;

		dev_priv->rps.rp1_freq = (rp_state_cap >>  8) & 0xff;

		dev_priv->rps.min_freq = (rp_state_cap >>  0) & 0xff;

	} else {

		rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);

		u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);

		dev_priv->rps.rp0_freq = (rp_state_cap >>  0) & 0xff;

		dev_priv->rps.rp1_freq = (rp_state_cap >>  8) & 0xff;

		dev_priv->rps.min_freq = (rp_state_cap >> 16) & 0xff;

	}



	/* hw_max = RP0 until we check for overclocking */

	dev_priv->rps.max_freq = dev_priv->rps.rp0_freq;



	dev_priv->rps.efficient_freq = dev_priv->rps.rp1_freq;

	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv) ||

	    IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {

		ret = sandybridge_pcode_read(dev_priv,

		u32 ddcc_status = 0;



		if (sandybridge_pcode_read(dev_priv,

					   HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL,

					&ddcc_status);

		if (0 == ret)

					   &ddcc_status) == 0)

			dev_priv->rps.efficient_freq =

				clamp_t(u8,

					((ddcc_status >> 8) & 0xff),
@@ -5140,30 +5136,14 @@ static void gen6_init_rps_frequencies(struct drm_i915_private *dev_priv) 


	if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {

		/* Store the frequency values in 16.66 MHZ units, which is

		   the natural hardware unit for SKL */

		 * the natural hardware unit for SKL

		 */

		dev_priv->rps.rp0_freq *= GEN9_FREQ_SCALER;

		dev_priv->rps.rp1_freq *= GEN9_FREQ_SCALER;

		dev_priv->rps.min_freq *= GEN9_FREQ_SCALER;

		dev_priv->rps.max_freq *= GEN9_FREQ_SCALER;

		dev_priv->rps.efficient_freq *= GEN9_FREQ_SCALER;

	}



	dev_priv->rps.idle_freq = dev_priv->rps.min_freq;

	dev_priv->rps.cur_freq = dev_priv->rps.idle_freq;



	/* Preserve min/max settings in case of re-init */

	if (dev_priv->rps.max_freq_softlimit == 0)

		dev_priv->rps.max_freq_softlimit = dev_priv->rps.max_freq;



	if (dev_priv->rps.min_freq_softlimit == 0) {

		if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))

			dev_priv->rps.min_freq_softlimit =

				max_t(int, dev_priv->rps.efficient_freq,

				      intel_freq_opcode(dev_priv, 450));

		else

			dev_priv->rps.min_freq_softlimit =

				dev_priv->rps.min_freq;

	}

}



static void reset_rps(struct drm_i915_private *dev_priv,
@@ -5183,8 +5163,6 @@ static void gen9_enable_rps(struct drm_i915_private *dev_priv) 
{

	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);



	gen6_init_rps_frequencies(dev_priv);



	/* WaGsvDisableTurbo: Workaround to disable turbo on BXT A* */

	if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) {

		/*
@@ -5301,9 +5279,6 @@ static void gen8_enable_rps(struct drm_i915_private *dev_priv) 
	/* 2a: Disable RC states. */

	I915_WRITE(GEN6_RC_CONTROL, 0);



	/* Initialize rps frequencies */

	gen6_init_rps_frequencies(dev_priv);



	/* 2b: Program RC6 thresholds.*/

	I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);

	I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
@@ -5392,9 +5367,6 @@ static void gen6_enable_rps(struct drm_i915_private *dev_priv) 


	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);



	/* Initialize rps frequencies */

	gen6_init_rps_frequencies(dev_priv);



	/* disable the counters and set deterministic thresholds */

	I915_WRITE(GEN6_RC_CONTROL, 0);
@@ -5778,8 +5750,6 @@ static void valleyview_init_gt_powersave(struct drm_i915_private *dev_priv) 


	vlv_init_gpll_ref_freq(dev_priv);



	mutex_lock(&dev_priv->rps.hw_lock);



	val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);

	switch ((val >> 6) & 3) {

	case 0:
@@ -5815,18 +5785,6 @@ static void valleyview_init_gt_powersave(struct drm_i915_private *dev_priv) 
	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",

			 intel_gpu_freq(dev_priv, dev_priv->rps.min_freq),

			 dev_priv->rps.min_freq);



	dev_priv->rps.idle_freq = dev_priv->rps.min_freq;

	dev_priv->rps.cur_freq = dev_priv->rps.idle_freq;



	/* Preserve min/max settings in case of re-init */

	if (dev_priv->rps.max_freq_softlimit == 0)

		dev_priv->rps.max_freq_softlimit = dev_priv->rps.max_freq;



	if (dev_priv->rps.min_freq_softlimit == 0)

		dev_priv->rps.min_freq_softlimit = dev_priv->rps.min_freq;



	mutex_unlock(&dev_priv->rps.hw_lock);

}



static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv)
@@ -5837,8 +5795,6 @@ static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv) 


	vlv_init_gpll_ref_freq(dev_priv);



	mutex_lock(&dev_priv->rps.hw_lock);



	mutex_lock(&dev_priv->sb_lock);

	val = vlv_cck_read(dev_priv, CCK_FUSE_REG);

	mutex_unlock(&dev_priv->sb_lock);
@@ -5880,18 +5836,6 @@ static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv) 
		   dev_priv->rps.rp1_freq |

		   dev_priv->rps.min_freq) & 1,

		  "Odd GPU freq values\n");



	dev_priv->rps.idle_freq = dev_priv->rps.min_freq;

	dev_priv->rps.cur_freq = dev_priv->rps.idle_freq;



	/* Preserve min/max settings in case of re-init */

	if (dev_priv->rps.max_freq_softlimit == 0)

		dev_priv->rps.max_freq_softlimit = dev_priv->rps.max_freq;



	if (dev_priv->rps.min_freq_softlimit == 0)

		dev_priv->rps.min_freq_softlimit = dev_priv->rps.min_freq;



	mutex_unlock(&dev_priv->rps.hw_lock);

}



static void valleyview_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
@@ -6559,10 +6503,30 @@ void intel_init_gt_powersave(struct drm_i915_private *dev_priv) 
		intel_runtime_pm_get(dev_priv);

	}



	mutex_lock(&dev_priv->rps.hw_lock);



	/* Initialize RPS limits (for userspace) */

	if (IS_CHERRYVIEW(dev_priv))

		cherryview_init_gt_powersave(dev_priv);

	else if (IS_VALLEYVIEW(dev_priv))

		valleyview_init_gt_powersave(dev_priv);

	else

		gen6_init_rps_frequencies(dev_priv);



	/* Derive initial user preferences/limits from the hardware limits */

	dev_priv->rps.idle_freq = dev_priv->rps.min_freq;

	dev_priv->rps.cur_freq = dev_priv->rps.idle_freq;



	dev_priv->rps.max_freq_softlimit = dev_priv->rps.max_freq;

	dev_priv->rps.min_freq_softlimit = dev_priv->rps.min_freq;



	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))

		dev_priv->rps.min_freq_softlimit =

			max_t(int,

			      dev_priv->rps.efficient_freq,

			      intel_freq_opcode(dev_priv, 450));



	mutex_unlock(&dev_priv->rps.hw_lock);

}



void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv)

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