Re: [PATCH 09/12] drm/i915: Remove some post-commit members from intel_crtc->atomic, v2.

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

On Thu, 2015-11-19 at 16:07 +0100, Maarten Lankhorst wrote:
> fb_bits is useful to have in the crtc_state for cs flips when
> the code is updated to use intel_frontbuffer_flip_prepare/complete.
> So calculate it in advance and move it to crtc_state. The other stuff
> can be calculated in post_plane_update, and aren't useful elsewhere.
> 
> Changes since v1:
> - Changing wording, remove comment about loop.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_atomic.c  |  1 +
>  drivers/gpu/drm/i915/intel_display.c | 29 ++++++++++++++++++++---------
>  drivers/gpu/drm/i915/intel_drv.h     |  3 +--
>  3 files changed, 22 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_atomic.c
> b/drivers/gpu/drm/i915/intel_atomic.c
> index 8e579a8505ac..9a45cff26767 100644
> --- a/drivers/gpu/drm/i915/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/intel_atomic.c
> @@ -98,6 +98,7 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
>  	crtc_state->disable_cxsr = false;
>  	crtc_state->wm_changed = false;
>  	crtc_state->fb_changed = false;
> +	crtc_state->fb_bits = 0;
>  
>  	return &crtc_state->base;
>  }
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index d539703de367..95501aba7d23 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4730,15 +4730,20 @@ intel_pre_disable_primary(struct drm_crtc *crtc)
>  	hsw_disable_ips(intel_crtc);
>  }
>  
> -static void intel_post_plane_update(struct intel_crtc *crtc)
> +static void intel_post_plane_update(struct intel_crtc_state *old_crtc_state)
>  {
> +	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc);
> +	struct drm_atomic_state *old_state = old_crtc_state->base.state;
>  	struct intel_crtc_atomic_commit *atomic = &crtc->atomic;
>  	struct intel_crtc_state *pipe_config =
>  		to_intel_crtc_state(crtc->base.state);
>  	struct drm_device *dev = crtc->base.dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> +	struct drm_plane *primary = crtc->base.primary;
> +	struct drm_plane_state *old_pri_state =
> +		drm_atomic_get_existing_plane_state(old_state, primary);
>  
> -	intel_frontbuffer_flip(dev, atomic->fb_bits);
> +	intel_frontbuffer_flip(dev, pipe_config->fb_bits);
>  
>  	crtc->wm.cxsr_allowed = true;
>  
> @@ -4748,8 +4753,17 @@ static void intel_post_plane_update(struct intel_crtc
> *crtc)
>  	if (atomic->update_fbc)
>  		intel_fbc_update(dev_priv);
>  
> -	if (atomic->post_enable_primary)
> -		intel_post_enable_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_pri_state and old_primary_state. I wonder if it is worth creating a
intel_atomic_get_existing_plane_state() helper to avoid this kind of stuff.
Something to check out later.

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


> +
> +		if (primary_state->visible &&
> +		    (needs_modeset(&pipe_config->base) ||
> +		     !old_primary_state->visible))
> +			intel_post_enable_primary(&crtc->base);
> +	}
>  
>  	if (needs_modeset(&pipe_config->base))
>  		intel_display_power_put(dev_priv, POWER_DOMAIN_MODESET);
> @@ -11729,13 +11743,10 @@ int intel_plane_atomic_calc_changes(struct
> drm_crtc_state *crtc_state,
>  	}
>  
>  	if (visible || was_visible)
> -		intel_crtc->atomic.fb_bits |=
> -			to_intel_plane(plane)->frontbuffer_bit;
> +		pipe_config->fb_bits |= to_intel_plane(plane)
> ->frontbuffer_bit;
>  
>  	switch (plane->type) {
>  	case DRM_PLANE_TYPE_PRIMARY:
> -		intel_crtc->atomic.post_enable_primary = turn_on;
> -
>  		if (turn_off)
>  			intel_crtc->atomic.disable_fbc = true;
>  
> @@ -13444,7 +13455,7 @@ static int intel_atomic_commit(struct drm_device *dev,
>  	intel_atomic_wait_for_vblanks(dev, dev_priv, crtc_vblank_mask);
>  
>  	for_each_crtc_in_state(state, crtc, crtc_state, i)
> -		intel_post_plane_update(to_intel_crtc(crtc));
> +		intel_post_plane_update(to_intel_crtc_state(crtc_state));
>  
>  	mutex_lock(&dev->struct_mutex);
>  	drm_atomic_helper_cleanup_planes(dev, state);
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
> b/drivers/gpu/drm/i915/intel_drv.h
> index e4ae629e7009..35ae827ab923 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -370,6 +370,7 @@ struct intel_crtc_state {
>  #define PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS	(1<<0) /* unreliable sync
> mode.flags */
>  	unsigned long quirks;
>  
> +	unsigned fb_bits; /* framebuffers to flip */
>  	bool update_pipe; /* can a fast modeset be performed? */
>  	bool disable_cxsr;
>  	bool wm_changed; /* watermarks are updated */
> @@ -537,9 +538,7 @@ struct intel_crtc_atomic_commit {
>  	bool disable_fbc;
>  
>  	/* Sleepable operations to perform after commit */
> -	unsigned fb_bits;
>  	bool update_fbc;
> -	bool post_enable_primary;
>  };
>  
>  struct intel_crtc {
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