Re: [PATCH v2 09/14] drm/i915: Remove atomic.pre_disable_primary.

[Ander Conselvan De Oliveira <conselvan2@gmail.com>]

On Tue, 2015-11-03 at 08:31 +0100, Maarten Lankhorst wrote:
> This can be derived from the atomic state in pre_plane_update,
> which makes it more clear when it's supposed to be called.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 28 ++++++++++++++++++++--------
>  drivers/gpu/drm/i915/intel_drv.h     |  1 -
>  2 files changed, 20 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index 58074f4adca2..b1d6ce80daaf 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4766,26 +4766,40 @@ static void intel_post_plane_update(struct intel_crtc
> *crtc)
>  	memset(atomic, 0, sizeof(*atomic));
>  }
>  
> -static void intel_pre_plane_update(struct intel_crtc *crtc)
> +static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state)
>  {
> +	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
>  	struct drm_device *dev = crtc->base.dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  	struct intel_crtc_atomic_commit *atomic = &crtc->atomic;
>  	struct intel_crtc_state *pipe_config =
>  		to_intel_crtc_state(crtc->base.state);
> +	struct drm_atomic_state *old_state = old_crtc_state->base.state;
> +	struct drm_plane *primary = crtc->base.primary;
> +	struct drm_plane_state *old_pri_state =
> +		drm_atomic_get_existing_plane_state(old_state, primary);
> +	bool modeset = needs_modeset(&pipe_config->base);
>  
>  	if (atomic->disable_fbc)
>  		intel_fbc_disable_crtc(crtc);
>  
> -	if (atomic->pre_disable_primary)
> -		intel_pre_disable_primary(&crtc->base);
> +	if (old_pri_state) {
> +		struct intel_plane_state *primary_state =
> +			to_intel_plane_state(primary->state);
> +		struct intel_plane_state *old_primary_state =
> +			to_intel_plane_state(old_pri_state);

Hmm, old_primary_state is the intel_state cast of old_pri_state. Not very
descriptive. Maybe we could have a intel_atomic_get_existing_plane_state()
helper that does the cast for us. Seems like that's the end goal almost every
time we call drm_atomic_get_existing_plane_state() anyway. But I guess that can
be done later, so

Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>

> +
> +		if (old_primary_state->visible &&
> +		    (modeset || !primary_state->visible))
> +			intel_pre_disable_primary(&crtc->base);
> +	}
>  
>  	if (pipe_config->visible_changed) {
>  		crtc->wm.cxsr_allowed = false;
>  		intel_set_memory_cxsr(dev_priv, false);
>  	}
>  
> -	if (!needs_modeset(&pipe_config->base) && pipe_config->wm_changed)
> +	if (!modeset && pipe_config->wm_changed)
>  		intel_update_watermarks(&crtc->base);
>  }
>  
> @@ -11677,7 +11691,6 @@ int intel_plane_atomic_calc_changes(struct
> drm_crtc_state *crtc_state,
>  
>  	switch (plane->type) {
>  	case DRM_PLANE_TYPE_PRIMARY:
> -		intel_crtc->atomic.pre_disable_primary = turn_off;
>  		intel_crtc->atomic.post_enable_primary = turn_on;
>  
>  		if (turn_off)
> @@ -13318,7 +13331,7 @@ static int intel_atomic_commit(struct drm_device *dev,
>  		if (!needs_modeset(crtc->state))
>  			continue;
>  
> -		intel_pre_plane_update(intel_crtc);
> +		intel_pre_plane_update(to_intel_crtc_state(crtc_state));
>  
>  		if (crtc_state->active) {
>  			intel_crtc_disable_planes(crtc, crtc_state
> ->plane_mask);
> @@ -13341,7 +13354,6 @@ static int intel_atomic_commit(struct drm_device *dev,
>  
>  	/* Now enable the clocks, plane, pipe, and connectors that we set up.
> */
>  	for_each_crtc_in_state(state, crtc, crtc_state, i) {
> -		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>  		bool modeset = needs_modeset(crtc->state);
>  		struct intel_crtc_state *pipe_config =
>  			to_intel_crtc_state(crtc->state);
> @@ -13361,7 +13373,7 @@ static int intel_atomic_commit(struct drm_device *dev,
>  		}
>  
>  		if (!modeset)
> -			intel_pre_plane_update(intel_crtc);
> +			intel_pre_plane_update(to_intel_crtc_state(crtc_state
> ));
>  
>  		if (crtc->state->active &&
>  		    (crtc->state->planes_changed || update_pipe))
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index ce5f10fc92aa..8d86627069e5 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -537,7 +537,6 @@ struct intel_mmio_flip {
>  struct intel_crtc_atomic_commit {
>  	/* Sleepable operations to perform before commit */
>  	bool disable_fbc;
> -	bool pre_disable_primary;
>  
>  	/* Sleepable operations to perform after commit */
>  	unsigned fb_bits;
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