[Intel-gfx] [PATCH v2 01/13] drm/i915: Add debugs to distingiush a cd2x update from a full cdclk pll update

[Lisovskiy, Stanislav]

On Tue, 2019-10-15 at 22:30 +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> To make the logs a bit less confusing let's toss in some
> debug prints to indicate whether the cdclk reprogramming
> is going to happen with a single pipe active or whether we
> need to turn all pipes off for the duration.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_cdclk.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c
> b/drivers/gpu/drm/i915/display/intel_cdclk.c
> index 3d867963a6d1..6eaebc38ee01 100644
> --- a/drivers/gpu/drm/i915/display/intel_cdclk.c
> +++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
> @@ -2343,6 +2343,9 @@ int intel_modeset_calc_cdclk(struct
> intel_atomic_state *state)
>  			return ret;
>  
>  		state->cdclk.pipe = pipe;
> +
> +		DRM_DEBUG_KMS("Can change cdclk with pipe %c active\n",
> +			      pipe_name(pipe));
>  	} else if (intel_cdclk_needs_modeset(&dev_priv->cdclk.actual,
>  					     &state->cdclk.actual)) {
>  		ret = intel_modeset_all_pipes(state);
> @@ -2350,6 +2353,8 @@ int intel_modeset_calc_cdclk(struct
> intel_atomic_state *state)
>  			return ret;
>  
>  		state->cdclk.pipe = INVALID_PIPE;
> +
> +		DRM_DEBUG_KMS("Modeset required for cdclk change\n");
>  	}
>  
>  	DRM_DEBUG_KMS("New cdclk calculated to be logical %u kHz,
> actual %u kHz\n",