[Intel-gfx] [PATCH 10/19] drm/i915: check pipe power domain when reading its hw state

[Jesse Barnes]

On Tue, 18 Feb 2014 00:02:11 +0200
Imre Deak <imre.deak at intel.com> wrote:

> We can read out the pipe HW state only if the required power domain is
> on. If not we consider the pipe to be off.
> 
> Signed-off-by: Imre Deak <imre.deak at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 19 +++++++++++++++----
>  1 file changed, 15 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index ce1c00a..e3824f8 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9535,6 +9535,18 @@ check_encoder_state(struct drm_device *dev)
>  	}
>  }
>  
> +static bool intel_display_get_pipe_config(struct intel_crtc *crtc,
> +					  struct intel_crtc_config *pipe_config)
> +{
> +	struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
> +
> +	if (!intel_display_power_enabled(dev_priv,
> +					 POWER_DOMAIN_PIPE(crtc->pipe)))
> +		return false;
> +
> +	return dev_priv->display.get_pipe_config(crtc, pipe_config);
> +}
> +
>  static void
>  check_crtc_state(struct drm_device *dev)
>  {
> @@ -9572,8 +9584,7 @@ check_crtc_state(struct drm_device *dev)
>  		     "crtc's computed enabled state doesn't match tracked enabled state "
>  		     "(expected %i, found %i)\n", enabled, crtc->base.enabled);
>  
> -		active = dev_priv->display.get_pipe_config(crtc,
> -							   &pipe_config);
> +		active = intel_display_get_pipe_config(crtc, &pipe_config);
>  
>  		/* hw state is inconsistent with the pipe A quirk */
>  		if (crtc->pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
> @@ -11328,8 +11339,8 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
>  			    base.head) {
>  		memset(&crtc->config, 0, sizeof(crtc->config));
>  
> -		crtc->active = dev_priv->display.get_pipe_config(crtc,
> -								 &crtc->config);
> +		crtc->active = intel_display_get_pipe_config(crtc,
> +							     &crtc->config);
>  
>  		crtc->base.enabled = crtc->active;
>  		crtc->primary_enabled = crtc->active;

Same comment about renaming .get_pipe_config applies here too, but I
think you got them all in this case, so that could be done on top.

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

-- 
Jesse Barnes, Intel Open Source Technology Center