[Intel-gfx] [PATCH v3] drm/i915/gen9: Update i915_drpc_info debugfs for coarse pg & forcewake info

[Kamble, Sagar A]

Reviewed-by: Sagar Arun Kamble <sagar.a.kamble at intel.com 
<mailto:sagar.a.kamble at intel.com>>


On 6/27/2016 8:10 PM, akash.goel at intel.com wrote:
> From: Akash Goel <akash.goel at intel.com>
>
> Updated the i915_drpc_info debugfs with coarse power gating & forcewake
> info for Gen9.
>
> v2: Change all IS_GEN9() by gen >= 9 (Damien)
>
> v3: Rebase
>
> Cc: Damien Lespiau <damien.lespiau at intel.com>
> Signed-off-by: Akash Goel <akash.goel at intel.com>
> ---
>   drivers/gpu/drm/i915/i915_debugfs.c | 21 ++++++++++++++++++++-
>   drivers/gpu/drm/i915/i915_reg.h     |  3 +++
>   2 files changed, 23 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index f664884..5185e02 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -1588,6 +1588,7 @@ static int gen6_drpc_info(struct seq_file *m)
>   	struct drm_device *dev = node->minor->dev;
>   	struct drm_i915_private *dev_priv = dev->dev_private;
>   	u32 rpmodectl1, gt_core_status, rcctl1, rc6vids = 0;
> +	u32 gen9_powergate_enable = 0, gen9_powergate_status = 0;
>   	unsigned forcewake_count;
>   	int count = 0, ret;
>   
> @@ -1615,6 +1616,10 @@ static int gen6_drpc_info(struct seq_file *m)
>   
>   	rpmodectl1 = I915_READ(GEN6_RP_CONTROL);
>   	rcctl1 = I915_READ(GEN6_RC_CONTROL);
> +	if (INTEL_INFO(dev)->gen >= 9) {
> +		gen9_powergate_enable = I915_READ(GEN9_PG_ENABLE);
> +		gen9_powergate_status = I915_READ(GEN9_PWRGT_DOMAIN_STATUS);
> +	}
>   	mutex_unlock(&dev->struct_mutex);
>   	mutex_lock(&dev_priv->rps.hw_lock);
>   	sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
> @@ -1633,6 +1638,12 @@ static int gen6_drpc_info(struct seq_file *m)
>   		   yesno(rcctl1 & GEN6_RC_CTL_RC1e_ENABLE));
>   	seq_printf(m, "RC6 Enabled: %s\n",
>   		   yesno(rcctl1 & GEN6_RC_CTL_RC6_ENABLE));
> +	if (INTEL_INFO(dev)->gen >= 9) {
> +		seq_printf(m, "Render Well Gating Enabled: %s\n",
> +			yesno(gen9_powergate_enable & GEN9_RENDER_PG_ENABLE));
> +		seq_printf(m, "Media Well Gating Enabled: %s\n",
> +			yesno(gen9_powergate_enable & GEN9_MEDIA_PG_ENABLE));
> +	}
>   	seq_printf(m, "Deep RC6 Enabled: %s\n",
>   		   yesno(rcctl1 & GEN6_RC_CTL_RC6p_ENABLE));
>   	seq_printf(m, "Deepest RC6 Enabled: %s\n",
> @@ -1661,6 +1672,14 @@ static int gen6_drpc_info(struct seq_file *m)
>   
>   	seq_printf(m, "Core Power Down: %s\n",
>   		   yesno(gt_core_status & GEN6_CORE_CPD_STATE_MASK));
> +	if (INTEL_INFO(dev)->gen >= 9) {
> +		seq_printf(m, "Render Power Well: %s\n",
> +			(gen9_powergate_status &
> +			 GEN9_PWRGT_RENDER_STATUS_MASK) ? "Up" : "Down");
> +		seq_printf(m, "Media Power Well: %s\n",
> +			(gen9_powergate_status &
> +			 GEN9_PWRGT_MEDIA_STATUS_MASK) ? "Up" : "Down");
> +	}
>   
>   	/* Not exactly sure what this is */
>   	seq_printf(m, "RC6 \"Locked to RPn\" residency since boot: %u\n",
> @@ -1678,7 +1697,7 @@ static int gen6_drpc_info(struct seq_file *m)
>   		   GEN6_DECODE_RC6_VID(((rc6vids >> 8) & 0xff)));
>   	seq_printf(m, "RC6++ voltage: %dmV\n",
>   		   GEN6_DECODE_RC6_VID(((rc6vids >> 16) & 0xff)));
> -	return 0;
> +	return i915_forcewake_domains(m, NULL);
>   }
>   
>   static int i915_drpc_info(struct seq_file *m, void *unused)
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index c6bfbf8..1c8d029 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -6955,6 +6955,9 @@ enum {
>   #define  ECOBUS					_MMIO(0xa180)
>   #define    FORCEWAKE_MT_ENABLE			(1<<5)
>   #define  VLV_SPAREG2H				_MMIO(0xA194)
> +#define  GEN9_PWRGT_DOMAIN_STATUS		_MMIO(0xA2A0)
> +#define   GEN9_PWRGT_MEDIA_STATUS_MASK		(1 << 0)
> +#define   GEN9_PWRGT_RENDER_STATUS_MASK		(1 << 1)
>   
>   #define  GTFIFODBG				_MMIO(0x120000)
>   #define    GT_FIFO_SBDEDICATE_FREE_ENTRY_CHV	(0x1f << 20)

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