Commit 8fb55197 authored by Chris Wilson's avatar Chris Wilson Committed by Daniel Vetter

drm/i915: Agressive downclocking on Baytrail

Reuse the same reclocking strategy for Baytail as on its bigger brethren,
Sandybridge and Ivybridge. In particular, this makes the device quicker
to reclock (both up and down) though the tendency now is to downclock
more aggressively to compensate for the RPS boosts.

v2: Rebase
v3: Exclude Cherrytrail as Deepak was concerned that the increased
number of register writes would wake the common powerwell too often.
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Deepak S <deepak.s@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: default avatarDeepak S <deepak.s@linux.intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent cf5d8a46
......@@ -1035,6 +1035,9 @@ struct intel_gen6_power_mgmt {
u8 rp0_freq; /* Non-overclocked max frequency. */
u32 cz_freq;
u8 up_threshold; /* Current %busy required to uplock */
u8 down_threshold; /* Current %busy required to downclock */
int last_adj;
enum { LOW_POWER, BETWEEN, HIGH_POWER } power;
......
......@@ -1049,7 +1049,7 @@ static u32 vlv_wa_c0_ei(struct drm_i915_private *dev_priv, u32 pm_iir)
if (pm_iir & GEN6_PM_RP_DOWN_EI_EXPIRED) {
if (!vlv_c0_above(dev_priv,
&dev_priv->rps.down_ei, &now,
VLV_RP_DOWN_EI_THRESHOLD))
dev_priv->rps.down_threshold))
events |= GEN6_PM_RP_DOWN_THRESHOLD;
dev_priv->rps.down_ei = now;
}
......@@ -1057,7 +1057,7 @@ static u32 vlv_wa_c0_ei(struct drm_i915_private *dev_priv, u32 pm_iir)
if (pm_iir & GEN6_PM_RP_UP_EI_EXPIRED) {
if (vlv_c0_above(dev_priv,
&dev_priv->rps.up_ei, &now,
VLV_RP_UP_EI_THRESHOLD))
dev_priv->rps.up_threshold))
events |= GEN6_PM_RP_UP_THRESHOLD;
dev_priv->rps.up_ei = now;
}
......
......@@ -671,8 +671,6 @@ enum skl_disp_power_wells {
#define FB_FMAX_VMIN_FREQ_LO_MASK 0xf8000000
#define VLV_CZ_CLOCK_TO_MILLI_SEC 100000
#define VLV_RP_UP_EI_THRESHOLD 90
#define VLV_RP_DOWN_EI_THRESHOLD 70
/* vlv2 north clock has */
#define CCK_FUSE_REG 0x8
......
......@@ -3934,6 +3934,8 @@ static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
GEN6_RP_DOWN_IDLE_AVG);
dev_priv->rps.power = new_power;
dev_priv->rps.up_threshold = threshold_up;
dev_priv->rps.down_threshold = threshold_down;
dev_priv->rps.last_adj = 0;
}
......@@ -4005,8 +4007,11 @@ static void valleyview_set_rps(struct drm_device *dev, u8 val)
"Odd GPU freq value\n"))
val &= ~1;
if (val != dev_priv->rps.cur_freq)
if (val != dev_priv->rps.cur_freq) {
vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
if (!IS_CHERRYVIEW(dev_priv))
gen6_set_rps_thresholds(dev_priv, val);
}
I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
......@@ -4055,6 +4060,7 @@ static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
& GENFREQSTATUS) == 0, 100))
DRM_ERROR("timed out waiting for Punit\n");
gen6_set_rps_thresholds(dev_priv, val);
vlv_force_gfx_clock(dev_priv, false);
I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
......
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