Re: [PATCH 1/6] drm/i915: Clean up VLV rps code a bit

[Jesse Barnes <jbarnes@virtuousgeek.org>]

On Tue, 25 Jun 2013 19:21:01 +0300
ville.syrjala@linux.intel.com wrote:

> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Always print both the MHz value and raw register value for rps stuff.
> 
> Also kill a somewhat pointless local 'rpe' variable and just use
> dev_priv->rps.rpe_delay.
> 
> While at it clean up the caps in "GPU" and "Punit" debug messages.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_pm.c | 50 ++++++++++++++++++++++++-----------------
>  1 file changed, 30 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 3705203..48a3162 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3077,10 +3077,11 @@ void valleyview_set_rps(struct drm_device *dev, u8 val)
>  	WARN_ON(val > dev_priv->rps.max_delay);
>  	WARN_ON(val < dev_priv->rps.min_delay);
>  
> -	DRM_DEBUG_DRIVER("gpu freq request from %d to %d\n",
> +	DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
>  			 vlv_gpu_freq(dev_priv->mem_freq,
>  				      dev_priv->rps.cur_delay),
> -			 vlv_gpu_freq(dev_priv->mem_freq, val));
> +			 dev_priv->rps.cur_delay,
> +			 vlv_gpu_freq(dev_priv->mem_freq, val), val);
>  
>  	if (val == dev_priv->rps.cur_delay)
>  		return;
> @@ -3098,8 +3099,9 @@ void valleyview_set_rps(struct drm_device *dev, u8 val)
>  
>  	pval = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
>  	if ((pval >> 8) != val)
> -		DRM_DEBUG_DRIVER("punit overrode freq: %d requested, but got %d\n",
> -			  val, pval >> 8);
> +		DRM_DEBUG_DRIVER("Punit overrode GPU freq: %d MHz (%u) requested, but got %d Mhz (%u)\n",
> +				 vlv_gpu_freq(dev_priv->mem_freq, val), val,
> +				 vlv_gpu_freq(dev_priv->mem_freq, pval >> 8), pval >> 8);
>  
>  	/* Make sure we continue to get interrupts
>  	 * until we hit the minimum or maximum frequencies.
> @@ -3493,7 +3495,7 @@ static void valleyview_enable_rps(struct drm_device *dev)
>  {
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  	struct intel_ring_buffer *ring;
> -	u32 gtfifodbg, val, rpe;
> +	u32 gtfifodbg, val;
>  	int i;
>  
>  	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
> @@ -3554,31 +3556,39 @@ static void valleyview_enable_rps(struct drm_device *dev)
>  	DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
>  	DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
>  
> -	DRM_DEBUG_DRIVER("current GPU freq: %d\n",
> -			 vlv_gpu_freq(dev_priv->mem_freq, (val >> 8) & 0xff));
>  	dev_priv->rps.cur_delay = (val >> 8) & 0xff;
> +	DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
> +			 vlv_gpu_freq(dev_priv->mem_freq,
> +				      dev_priv->rps.cur_delay),
> +			 dev_priv->rps.cur_delay);
>  
>  	dev_priv->rps.max_delay = valleyview_rps_max_freq(dev_priv);
>  	dev_priv->rps.hw_max = dev_priv->rps.max_delay;
> -	DRM_DEBUG_DRIVER("max GPU freq: %d\n", vlv_gpu_freq(dev_priv->mem_freq,
> -						     dev_priv->rps.max_delay));
> +	DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
> +			 vlv_gpu_freq(dev_priv->mem_freq,
> +				      dev_priv->rps.max_delay),
> +			 dev_priv->rps.max_delay);
>  
> -	rpe = valleyview_rps_rpe_freq(dev_priv);
> -	DRM_DEBUG_DRIVER("RPe GPU freq: %d\n",
> -			 vlv_gpu_freq(dev_priv->mem_freq, rpe));
> -	dev_priv->rps.rpe_delay = rpe;
> +	dev_priv->rps.rpe_delay = valleyview_rps_rpe_freq(dev_priv);
> +	DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
> +			 vlv_gpu_freq(dev_priv->mem_freq,
> +				      dev_priv->rps.rpe_delay),
> +			 dev_priv->rps.rpe_delay);
>  
> -	val = valleyview_rps_min_freq(dev_priv);
> -	DRM_DEBUG_DRIVER("min GPU freq: %d\n", vlv_gpu_freq(dev_priv->mem_freq,
> -							    val));
> -	dev_priv->rps.min_delay = val;
> +	dev_priv->rps.min_delay = valleyview_rps_min_freq(dev_priv);
> +	DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
> +			 vlv_gpu_freq(dev_priv->mem_freq,
> +				      dev_priv->rps.min_delay),
> +			 dev_priv->rps.min_delay);
>  
> -	DRM_DEBUG_DRIVER("setting GPU freq to %d\n",
> -			 vlv_gpu_freq(dev_priv->mem_freq, rpe));
> +	DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
> +			 vlv_gpu_freq(dev_priv->mem_freq,
> +				      dev_priv->rps.rpe_delay),
> +			 dev_priv->rps.rpe_delay);
>  
>  	INIT_DELAYED_WORK(&dev_priv->rps.vlv_work, vlv_rps_timer_work);
>  
> -	valleyview_set_rps(dev_priv->dev, rpe);
> +	valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay);
>  
>  	/* requires MSI enabled */
>  	I915_WRITE(GEN6_PMIER, GEN6_PM_RPS_EVENTS);

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>

-- 
Jesse Barnes, Intel Open Source Technology Center
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