[Intel-gfx] [PATCH] drm/i915: We don't need display's suspend/resume operations when !HAS_DISPLAY

[Souza, Jose]

On Sun, 2019-05-19 at 21:56 -0700, Rodrigo Vivi wrote:
> Suspend resume is broken if we try to enable/disable dc9 on
> cases with disabled displays.
> 

Reviewed-by: José Roberto de Souza <jose.souza at intel.com>

> Cc: José Roberto de Souza <jose.souza at intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.c | 103 ++++++++++++++++++++++------
> ----
>  1 file changed, 71 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c
> b/drivers/gpu/drm/i915/i915_drv.c
> index 2c7a4318d13c..90693327065a 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -2117,6 +2117,15 @@ get_suspend_mode(struct drm_i915_private
> *dev_priv, bool hibernate)
>  	return I915_DRM_SUSPEND_MEM;
>  }
>  
> +static void intel_display_suspend_late(struct drm_i915_private
> *dev_priv)
> +{
> +	if (!HAS_DISPLAY(dev_priv))
> +		return;
> +
> +	if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv))
> +		bxt_enable_dc9(dev_priv);
> +}
> +
>  static int i915_drm_suspend_late(struct drm_device *dev, bool
> hibernation)
>  {
>  	struct drm_i915_private *dev_priv = to_i915(dev);
> @@ -2132,10 +2141,10 @@ static int i915_drm_suspend_late(struct
> drm_device *dev, bool hibernation)
>  	intel_power_domains_suspend(dev_priv,
>  				    get_suspend_mode(dev_priv,
> hibernation));
>  
> +	intel_display_suspend_late(dev_priv);
> +
>  	ret = 0;
> -	if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv))
> -		bxt_enable_dc9(dev_priv);
> -	else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> +	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
>  		hsw_enable_pc8(dev_priv);
>  	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
>  		ret = vlv_suspend_complete(dev_priv);
> @@ -2265,6 +2274,17 @@ static int i915_drm_resume(struct drm_device
> *dev)
>  	return 0;
>  }
>  
> +static void intel_display_resume_early(struct drm_i915_private
> *dev_priv)
> +{
> +	if (!HAS_DISPLAY(dev_priv))
> +		return;
> +
> +	if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv)) {
> +		gen9_sanitize_dc_state(dev_priv);
> +		bxt_disable_dc9(dev_priv);
> +	}
> +}
> +
>  static int i915_drm_resume_early(struct drm_device *dev)
>  {
>  	struct drm_i915_private *dev_priv = to_i915(dev);
> @@ -2327,10 +2347,9 @@ static int i915_drm_resume_early(struct
> drm_device *dev)
>  
>  	i915_check_and_clear_faults(dev_priv);
>  
> -	if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv)) {
> -		gen9_sanitize_dc_state(dev_priv);
> -		bxt_disable_dc9(dev_priv);
> -	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> +	intel_display_resume_early(dev_priv);
> +
> +	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
>  		hsw_disable_pc8(dev_priv);
>  	}
>  
> @@ -2868,6 +2887,20 @@ static int vlv_resume_prepare(struct
> drm_i915_private *dev_priv,
>  	return ret;
>  }
>  
> +static void intel_runtime_display_suspend(struct drm_i915_private
> *dev_priv)
> +{
> +	if (!HAS_DISPLAY(dev_priv))
> +		return;
> +
> +	if (INTEL_GEN(dev_priv) >= 11) {
> +		icl_display_core_uninit(dev_priv);
> +		bxt_enable_dc9(dev_priv);
> +	} else if (IS_GEN9_LP(dev_priv)) {
> +		bxt_display_core_uninit(dev_priv);
> +		bxt_enable_dc9(dev_priv);
> +	}
> +}
> +
>  static int intel_runtime_suspend(struct device *kdev)
>  {
>  	struct pci_dev *pdev = to_pci_dev(kdev);
> @@ -2897,14 +2930,10 @@ static int intel_runtime_suspend(struct
> device *kdev)
>  
>  	intel_uncore_suspend(&dev_priv->uncore);
>  
> +	intel_runtime_display_suspend(dev_priv);
> +
>  	ret = 0;
> -	if (INTEL_GEN(dev_priv) >= 11) {
> -		icl_display_core_uninit(dev_priv);
> -		bxt_enable_dc9(dev_priv);
> -	} else if (IS_GEN9_LP(dev_priv)) {
> -		bxt_display_core_uninit(dev_priv);
> -		bxt_enable_dc9(dev_priv);
> -	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> +	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
>  		hsw_enable_pc8(dev_priv);
>  	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> {
>  		ret = vlv_suspend_complete(dev_priv);
> @@ -2966,6 +2995,31 @@ static int intel_runtime_suspend(struct device
> *kdev)
>  	return 0;
>  }
>  
> +static void intel_runtime_display_resume(struct drm_i915_private
> *dev_priv)
> +{
> +	if (!HAS_DISPLAY(dev_priv))
> +		return;
> +
> +	if (INTEL_GEN(dev_priv) >= 11) {
> +		bxt_disable_dc9(dev_priv);
> +		icl_display_core_init(dev_priv, true);
> +		if (dev_priv->csr.dmc_payload) {
> +			if (dev_priv->csr.allowed_dc_mask &
> +			    DC_STATE_EN_UPTO_DC6)
> +				skl_enable_dc6(dev_priv);
> +			else if (dev_priv->csr.allowed_dc_mask &
> +				 DC_STATE_EN_UPTO_DC5)
> +				gen9_enable_dc5(dev_priv);
> +		}
> +	} else if (IS_GEN9_LP(dev_priv)) {
> +		bxt_disable_dc9(dev_priv);
> +		bxt_display_core_init(dev_priv, true);
> +		if (dev_priv->csr.dmc_payload &&
> +		    (dev_priv->csr.allowed_dc_mask &
> DC_STATE_EN_UPTO_DC5))
> +			gen9_enable_dc5(dev_priv);
> +	}
> +}
> +
>  static int intel_runtime_resume(struct device *kdev)
>  {
>  	struct pci_dev *pdev = to_pci_dev(kdev);
> @@ -2986,24 +3040,9 @@ static int intel_runtime_resume(struct device
> *kdev)
>  	if (intel_uncore_unclaimed_mmio(&dev_priv->uncore))
>  		DRM_DEBUG_DRIVER("Unclaimed access during suspend,
> bios?\n");
>  
> -	if (INTEL_GEN(dev_priv) >= 11) {
> -		bxt_disable_dc9(dev_priv);
> -		icl_display_core_init(dev_priv, true);
> -		if (dev_priv->csr.dmc_payload) {
> -			if (dev_priv->csr.allowed_dc_mask &
> -			    DC_STATE_EN_UPTO_DC6)
> -				skl_enable_dc6(dev_priv);
> -			else if (dev_priv->csr.allowed_dc_mask &
> -				 DC_STATE_EN_UPTO_DC5)
> -				gen9_enable_dc5(dev_priv);
> -		}
> -	} else if (IS_GEN9_LP(dev_priv)) {
> -		bxt_disable_dc9(dev_priv);
> -		bxt_display_core_init(dev_priv, true);
> -		if (dev_priv->csr.dmc_payload &&
> -		    (dev_priv->csr.allowed_dc_mask &
> DC_STATE_EN_UPTO_DC5))
> -			gen9_enable_dc5(dev_priv);
> -	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
> +	intel_runtime_display_resume(dev_priv);
> +
> +	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
>  		hsw_disable_pc8(dev_priv);
>  	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> {
>  		ret = vlv_resume_prepare(dev_priv, true);
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