[Intel-gfx] [PATCH v9 5/7] drm/i915/tgl: DC3CO PSR2 helper

[Imre Deak]

On Thu, Sep 26, 2019 at 08:26:19PM +0530, Anshuman Gupta wrote:
> Disallow DC3CO state before PSR2 exit.
> Store dc3co_exitline from crtc state to psr dev_priv
> structure to use it easily whenever it requires.
> 
> v1: Moved calling of tgl_enable_psr2_transcoder_exitline() to
>     intel_psr_enable(). [Imre]
> v2: Moved tgl_psr2_deep_sleep_enable/disable function to
>     the patches where they are getting used and used dc3co_exitline
>     check instead of TGL check. [Imre]
> 
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Imre Deak <imre.deak at intel.com>
> Cc: Animesh Manna <animesh.manna at intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>

Please merge this patch to the next one.

> ---
>  drivers/gpu/drm/i915/display/intel_psr.c | 8 ++++++++
>  drivers/gpu/drm/i915/i915_drv.h          | 1 +
>  2 files changed, 9 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> index b3c7eef53bf3..bf0b741d3243 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -534,6 +534,12 @@ transcoder_has_psr2(struct drm_i915_private *dev_priv, enum transcoder trans)
>  		return trans == TRANSCODER_EDP;
>  }
>  
> +static void tgl_disallow_dc3co_on_psr2_exit(struct drm_i915_private *dev_priv)
> +{
> +	if (!dev_priv->psr.dc3co_exitline)
> +		return;
> +}
> +
>  static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
>  				    struct intel_crtc_state *crtc_state)
>  {
> @@ -746,6 +752,7 @@ static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
>  	dev_priv->psr.psr2_enabled = intel_psr2_enabled(dev_priv, crtc_state);
>  	dev_priv->psr.busy_frontbuffer_bits = 0;
>  	dev_priv->psr.pipe = to_intel_crtc(crtc_state->base.crtc)->pipe;
> +	dev_priv->psr.dc3co_exitline = crtc_state->dc3co_exitline;
>  	dev_priv->psr.transcoder = crtc_state->cpu_transcoder;
>  
>  	/*
> @@ -829,6 +836,7 @@ static void intel_psr_exit(struct drm_i915_private *dev_priv)
>  	}
>  
>  	if (dev_priv->psr.psr2_enabled) {
> +		tgl_disallow_dc3co_on_psr2_exit(dev_priv);
>  		val = I915_READ(EDP_PSR2_CTL(dev_priv->psr.transcoder));
>  		WARN_ON(!(val & EDP_PSR2_ENABLE));
>  		val &= ~EDP_PSR2_ENABLE;
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index cddc98ea9965..c3aba078262f 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -501,6 +501,7 @@ struct i915_psr {
>  	bool sink_not_reliable;
>  	bool irq_aux_error;
>  	u16 su_x_granularity;
> +	u32 dc3co_exitline;
>  };
>  
>  #define QUIRK_LVDS_SSC_DISABLE (1<<1)
> -- 
> 2.21.0
>