On Tue, Nov 10, 2020 at 01:12:36AM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <[email protected]>
> 
> Add a wrapper for the pll .get_hw_state() vfunc. Makes life
> a bit less miserable when you don't have to worry where the
> function pointer is stored.
> 
> Signed-off-by: Ville Syrjälä <[email protected]>

Reviewed-by: Imre Deak <[email protected]>

There's also assert_shared_dpll().

> ---
>  drivers/gpu/drm/i915/display/intel_display.c  | 14 +++++++------
>  drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 20 ++++++++++++++++---
>  drivers/gpu/drm/i915/display/intel_dpll_mgr.h |  3 +++
>  3 files changed, 28 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
> b/drivers/gpu/drm/i915/display/intel_display.c
> index 2729c852c668..a7c4cd7a8a31 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -10927,6 +10927,7 @@ static bool ilk_get_pipe_config(struct intel_crtc 
> *crtc,
>       if (intel_de_read(dev_priv, PCH_TRANSCONF(crtc->pipe)) & TRANS_ENABLE) {
>               struct intel_shared_dpll *pll;
>               enum intel_dpll_id pll_id;
> +             bool pll_active;
>  
>               pipe_config->has_pch_encoder = true;
>  
> @@ -10954,8 +10955,9 @@ static bool ilk_get_pipe_config(struct intel_crtc 
> *crtc,
>                       intel_get_shared_dpll_by_id(dev_priv, pll_id);
>               pll = pipe_config->shared_dpll;
>  
> -             drm_WARN_ON(dev, !pll->info->funcs->get_hw_state(dev_priv, pll,
> -                                              &pipe_config->dpll_hw_state));
> +             pll_active = intel_dpll_get_hw_state(dev_priv, pll,
> +                                                  
> &pipe_config->dpll_hw_state);
> +             drm_WARN_ON(dev, !pll_active);
>  
>               tmp = pipe_config->dpll_hw_state.dpll;
>               pipe_config->pixel_multiplier =
> @@ -11346,9 +11348,9 @@ static void hsw_get_ddi_port_state(struct intel_crtc 
> *crtc,
>  
>       pll = pipe_config->shared_dpll;
>       if (pll) {
> -             drm_WARN_ON(&dev_priv->drm,
> -                         !pll->info->funcs->get_hw_state(dev_priv, pll,
> -                                             &pipe_config->dpll_hw_state));
> +             bool pll_active = intel_dpll_get_hw_state(dev_priv, pll,
> +                                                       
> &pipe_config->dpll_hw_state);
> +             drm_WARN_ON(&dev_priv->drm, !pll_active);
>       }
>  
>       /*
> @@ -14587,7 +14589,7 @@ verify_single_dpll_state(struct drm_i915_private 
> *dev_priv,
>  
>       drm_dbg_kms(&dev_priv->drm, "%s\n", pll->info->name);
>  
> -     active = pll->info->funcs->get_hw_state(dev_priv, pll, &dpll_hw_state);
> +     active = intel_dpll_get_hw_state(dev_priv, pll, &dpll_hw_state);
>  
>       if (!(pll->info->flags & INTEL_DPLL_ALWAYS_ON)) {
>               I915_STATE_WARN(!pll->on && pll->active_mask,
> diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c 
> b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> index a95e6a2ac698..1604c20bac33 100644
> --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> @@ -141,7 +141,7 @@ void assert_shared_dpll(struct drm_i915_private *dev_priv,
>                    "asserting DPLL %s with no DPLL\n", onoff(state)))
>               return;
>  
> -     cur_state = pll->info->funcs->get_hw_state(dev_priv, pll, &hw_state);
> +     cur_state = intel_dpll_get_hw_state(dev_priv, pll, &hw_state);
>       I915_STATE_WARN(cur_state != state,
>            "%s assertion failure (expected %s, current %s)\n",
>                       pll->info->name, onoff(state), onoff(cur_state));
> @@ -4527,13 +4527,27 @@ int intel_dpll_get_freq(struct drm_i915_private *i915,
>       return pll->info->funcs->get_freq(i915, pll);
>  }
>  
> +/**
> + * intel_dpll_get_hw_state - readout the DPLL's hardware state
> + * @i915: i915 device
> + * @pll: DPLL for which to calculate the output frequency
> + * @hw_state: DPLL's hardware state
> + *
> + * Read out @pll's hardware state into @hw_state.
> + */
> +bool intel_dpll_get_hw_state(struct drm_i915_private *i915,
> +                          struct intel_shared_dpll *pll,
> +                          struct intel_dpll_hw_state *hw_state)
> +{
> +     return pll->info->funcs->get_hw_state(i915, pll, hw_state);
> +}
> +
>  static void readout_dpll_hw_state(struct drm_i915_private *i915,
>                                 struct intel_shared_dpll *pll)
>  {
>       struct intel_crtc *crtc;
>  
> -     pll->on = pll->info->funcs->get_hw_state(i915, pll,
> -                                              &pll->state.hw_state);
> +     pll->on = intel_dpll_get_hw_state(i915, pll, &pll->state.hw_state);
>  
>       if (IS_JSL_EHL(i915) && pll->on &&
>           pll->info->id == DPLL_ID_EHL_DPLL4) {
> diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.h 
> b/drivers/gpu/drm/i915/display/intel_dpll_mgr.h
> index 205542fb8dc7..4357f92eafd6 100644
> --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.h
> +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.h
> @@ -400,6 +400,9 @@ void intel_update_active_dpll(struct intel_atomic_state 
> *state,
>                             struct intel_encoder *encoder);
>  int intel_dpll_get_freq(struct drm_i915_private *i915,
>                       const struct intel_shared_dpll *pll);
> +bool intel_dpll_get_hw_state(struct drm_i915_private *i915,
> +                          struct intel_shared_dpll *pll,
> +                          struct intel_dpll_hw_state *hw_state);
>  void intel_prepare_shared_dpll(const struct intel_crtc_state *crtc_state);
>  void intel_enable_shared_dpll(const struct intel_crtc_state *crtc_state);
>  void intel_disable_shared_dpll(const struct intel_crtc_state *crtc_state);
> -- 
> 2.26.2
> 
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