[Intel-gfx] [PATCH v7] drm/i915/chv: Enable RPS (Turbo) for Cherryview
Mika Kuoppala
mika.kuoppala at linux.intel.com
Tue May 27 12:45:59 CEST 2014
deepak.s at linux.intel.com writes:
> From: Deepak S <deepak.s at linux.intel.com>
>
> v2: Disable media turbo and Add DOWN_IDLE_AVG support (Ville)
>
> v3: Mass rename of the dev_priv->rps variables in upstream.
>
> v4: Rebase against latest code. (Deepak)
>
> v5: Rebase against latest nightly code. (Deepak)
>
> v6: Rename the variables to match the spec (Mika)
>
> v7: change min/max freq variable naming to match spec (Mika)
>
> Signed-off-by: Deepak S <deepak.s at linux.intel.com>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> ---
Reviewed-by: Mika Kuoppala <mika.kuoppala at intel.com>
> drivers/gpu/drm/i915/i915_reg.h | 11 +++++
> drivers/gpu/drm/i915/intel_pm.c | 92 ++++++++++++++++++++++++++++++++++++++++-
> 2 files changed, 102 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index c1f36a5..8a935cf 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -529,6 +529,16 @@ enum punit_power_well {
> #define PUNIT_FUSE_BUS2 0xf6 /* bits 47:40 */
> #define PUNIT_FUSE_BUS1 0xf5 /* bits 55:48 */
>
> +#define PUNIT_GPU_STATUS_REG 0xdb
> +#define PUNIT_GPU_STATUS_MAX_FREQ_SHIFT 16
> +#define PUNIT_GPU_STATUS_MAX_FREQ_MASK 0xff
> +#define PUNIT_GPU_STATIS_GFX_MIN_FREQ_SHIFT 8
> +#define PUNIT_GPU_STATUS_GFX_MIN_FREQ_MASK 0xff
> +
> +#define PUNIT_GPU_DUTYCYCLE_REG 0xdf
> +#define PUNIT_GPU_DUTYCYCLE_RPE_FREQ_SHIFT 8
> +#define PUNIT_GPU_DUTYCYCLE_RPE_FREQ_MASK 0xff
> +
> #define IOSF_NC_FB_GFX_FREQ_FUSE 0x1c
> #define FB_GFX_MAX_FREQ_FUSE_SHIFT 3
> #define FB_GFX_MAX_FREQ_FUSE_MASK 0x000007f8
> @@ -933,6 +943,7 @@ enum punit_power_well {
> #define SANDYBRIDGE_FENCE_PITCH_SHIFT 32
> #define GEN7_FENCE_MAX_PITCH_VAL 0x0800
>
> +
> /* control register for cpu gtt access */
> #define TILECTL 0x101000
> #define TILECTL_SWZCTL (1 << 0)
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 1816c52..0f36405 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3731,6 +3731,35 @@ void gen6_update_ring_freq(struct drm_device *dev)
> mutex_unlock(&dev_priv->rps.hw_lock);
> }
>
> +int cherryview_rps_max_freq(struct drm_i915_private *dev_priv)
> +{
> + u32 val, rp0;
> +
> + val = vlv_punit_read(dev_priv, PUNIT_GPU_STATUS_REG);
> + rp0 = (val >> PUNIT_GPU_STATUS_MAX_FREQ_SHIFT) & PUNIT_GPU_STATUS_MAX_FREQ_MASK;
> +
> + return rp0;
> +}
> +
> +static int cherryview_rps_rpe_freq(struct drm_i915_private *dev_priv)
> +{
> + u32 val, rpe;
> +
> + val = vlv_punit_read(dev_priv, PUNIT_GPU_DUTYCYCLE_REG);
> + rpe = (val >> PUNIT_GPU_DUTYCYCLE_RPE_FREQ_SHIFT) & PUNIT_GPU_DUTYCYCLE_RPE_FREQ_MASK;
> +
> + return rpe;
> +}
> +
> +int cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
> +{
> + u32 val, rpn;
> +
> + val = vlv_punit_read(dev_priv, PUNIT_GPU_STATUS_REG);
> + rpn = (val >> PUNIT_GPU_STATIS_GFX_MIN_FREQ_SHIFT) & PUNIT_GPU_STATUS_GFX_MIN_FREQ_MASK;
> + return rpn;
> +}
> +
> int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
> {
> u32 val, rp0;
> @@ -3890,7 +3919,36 @@ static void valleyview_init_gt_powersave(struct drm_device *dev)
>
> static void cherryview_init_gt_powersave(struct drm_device *dev)
> {
> + struct drm_i915_private *dev_priv = dev->dev_private;
> +
> cherryview_setup_pctx(dev);
> +
> + mutex_lock(&dev_priv->rps.hw_lock);
> +
> + dev_priv->rps.max_freq = cherryview_rps_max_freq(dev_priv);
> + dev_priv->rps.rp0_freq = dev_priv->rps.max_freq;
> + DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
> + vlv_gpu_freq(dev_priv, dev_priv->rps.max_freq),
> + dev_priv->rps.max_freq);
> +
> + dev_priv->rps.efficient_freq = cherryview_rps_rpe_freq(dev_priv);
> + DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
> + vlv_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
> + dev_priv->rps.efficient_freq);
> +
> + dev_priv->rps.min_freq = cherryview_rps_min_freq(dev_priv);
> + DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
> + vlv_gpu_freq(dev_priv, dev_priv->rps.min_freq),
> + dev_priv->rps.min_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_device *dev)
> @@ -3902,7 +3960,7 @@ static void cherryview_enable_rps(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> struct intel_engine_cs *ring;
> - u32 gtfifodbg, rc6_mode = 0, pcbr;
> + u32 gtfifodbg, val, rc6_mode = 0, pcbr;
> int i;
>
> WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
> @@ -3949,6 +4007,38 @@ static void cherryview_enable_rps(struct drm_device *dev)
>
> I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
>
> + /* 4 Program defaults and thresholds for RPS*/
> + I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
> + I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
> + I915_WRITE(GEN6_RP_UP_EI, 66000);
> + I915_WRITE(GEN6_RP_DOWN_EI, 350000);
> +
> + I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
> +
> + /* 5: Enable RPS */
> + I915_WRITE(GEN6_RP_CONTROL,
> + GEN6_RP_MEDIA_HW_NORMAL_MODE |
> + GEN6_RP_MEDIA_IS_GFX |
> + GEN6_RP_ENABLE |
> + GEN6_RP_UP_BUSY_AVG |
> + GEN6_RP_DOWN_IDLE_AVG);
> +
> + val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
> +
> + DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
> + DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
> +
> + dev_priv->rps.cur_freq = (val >> 8) & 0xff;
> + DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
> + vlv_gpu_freq(dev_priv, dev_priv->rps.cur_freq),
> + dev_priv->rps.cur_freq);
> +
> + DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
> + vlv_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
> + dev_priv->rps.efficient_freq);
> +
> + valleyview_set_rps(dev_priv->dev, dev_priv->rps.efficient_freq);
> +
> gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
> }
>
> --
> 1.9.1
>
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