Re: [PATCH 4/5] drm/i915: Use new atomic iterator macros in display code

[Daniel Vetter <daniel@ffwll.ch>]

On Thu, Mar 09, 2017 at 03:52:04PM +0100, Maarten Lankhorst wrote:
> Add a big fat warning in __intel_display_resume that the old state is
> invalid, and use the correct state everywhere.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 161 ++++++++++++++++++-----------------

This file is too big. Because it's one big mess this patch here is way too
big and one big mess :(

>  1 file changed, 82 insertions(+), 79 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 5526a196e8a2..83f86cf44f66 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -3464,7 +3464,12 @@ __intel_display_resume(struct drm_device *dev,
>  	if (!state)
>  		return 0;
>  
> -	for_each_crtc_in_state(state, crtc, crtc_state, i) {
> +	/*
> +	 * We've duplicated the state, pointers to the old state are invalid.
> +	 *
> +	 * Don't attempt to use the old state until we commit the duplicated state.
> +	 */
> +	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {

Just a drive-by comment, but why exactly do we need this hack? We read out
full hw state like on boot-up, assuming our commit machinery computes the
diff correctly it should noticed that we have to do a full commit here.

Hacks like this imo show that we still have a fairly significant design
issue in our fastbook code ...

>  		/*
>  		 * Force recalculation even if we restore
>  		 * current state. With fast modeset this may not result
> @@ -5002,13 +5007,12 @@ static void intel_post_plane_update(struct intel_crtc_state *old_crtc_state)
>  	}
>  }
>  
> -static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state)
> +static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state,
> +				   struct intel_crtc_state *pipe_config)
>  {
>  	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 = to_i915(dev);
> -	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 =
> @@ -5105,12 +5109,11 @@ static void intel_encoders_pre_pll_enable(struct drm_crtc *crtc,
>  					  struct intel_crtc_state *crtc_state,
>  					  struct drm_atomic_state *old_state)
>  {
> -	struct drm_connector_state *old_conn_state;
> +	struct drm_connector_state *conn_state;
>  	struct drm_connector *conn;
>  	int i;
>  
> -	for_each_connector_in_state(old_state, conn, old_conn_state, i) {
> -		struct drm_connector_state *conn_state = conn->state;
> +	for_each_new_connector_in_state(old_state, conn, conn_state, i) {
>  		struct intel_encoder *encoder =
>  			to_intel_encoder(conn_state->best_encoder);
>  
> @@ -5126,12 +5129,11 @@ static void intel_encoders_pre_enable(struct drm_crtc *crtc,
>  				      struct intel_crtc_state *crtc_state,
>  				      struct drm_atomic_state *old_state)
>  {
> -	struct drm_connector_state *old_conn_state;
> +	struct drm_connector_state *conn_state;
>  	struct drm_connector *conn;
>  	int i;
>  
> -	for_each_connector_in_state(old_state, conn, old_conn_state, i) {
> -		struct drm_connector_state *conn_state = conn->state;
> +	for_each_new_connector_in_state(old_state, conn, conn_state, i) {
>  		struct intel_encoder *encoder =
>  			to_intel_encoder(conn_state->best_encoder);
>  
> @@ -5147,12 +5149,11 @@ static void intel_encoders_enable(struct drm_crtc *crtc,
>  				  struct intel_crtc_state *crtc_state,
>  				  struct drm_atomic_state *old_state)
>  {
> -	struct drm_connector_state *old_conn_state;
> +	struct drm_connector_state *conn_state;
>  	struct drm_connector *conn;
>  	int i;
>  
> -	for_each_connector_in_state(old_state, conn, old_conn_state, i) {
> -		struct drm_connector_state *conn_state = conn->state;
> +	for_each_new_connector_in_state(old_state, conn, conn_state, i) {
>  		struct intel_encoder *encoder =
>  			to_intel_encoder(conn_state->best_encoder);
>  
> @@ -5172,7 +5173,7 @@ static void intel_encoders_disable(struct drm_crtc *crtc,
>  	struct drm_connector *conn;
>  	int i;
>  
> -	for_each_connector_in_state(old_state, conn, old_conn_state, i) {
> +	for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
>  		struct intel_encoder *encoder =
>  			to_intel_encoder(old_conn_state->best_encoder);
>  
> @@ -5192,7 +5193,7 @@ static void intel_encoders_post_disable(struct drm_crtc *crtc,
>  	struct drm_connector *conn;
>  	int i;
>  
> -	for_each_connector_in_state(old_state, conn, old_conn_state, i) {
> +	for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
>  		struct intel_encoder *encoder =
>  			to_intel_encoder(old_conn_state->best_encoder);
>  
> @@ -5212,7 +5213,7 @@ static void intel_encoders_post_pll_disable(struct drm_crtc *crtc,
>  	struct drm_connector *conn;
>  	int i;
>  
> -	for_each_connector_in_state(old_state, conn, old_conn_state, i) {
> +	for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
>  		struct intel_encoder *encoder =
>  			to_intel_encoder(old_conn_state->best_encoder);
>  
> @@ -10877,7 +10878,7 @@ static bool check_single_encoder_cloning(struct drm_atomic_state *state,
>  	struct drm_connector_state *connector_state;
>  	int i;
>  
> -	for_each_connector_in_state(state, connector, connector_state, i) {
> +	for_each_new_connector_in_state(state, connector, connector_state, i) {
>  		if (connector_state->crtc != &crtc->base)
>  			continue;
>  
> @@ -11051,7 +11052,7 @@ compute_baseline_pipe_bpp(struct intel_crtc *crtc,
>  	state = pipe_config->base.state;
>  
>  	/* Clamp display bpp to EDID value */
> -	for_each_connector_in_state(state, connector, connector_state, i) {
> +	for_each_new_connector_in_state(state, connector, connector_state, i) {
>  		if (connector_state->crtc != &crtc->base)
>  			continue;
>  
> @@ -11324,7 +11325,7 @@ intel_modeset_pipe_config(struct drm_crtc *crtc,
>  			       &pipe_config->pipe_src_w,
>  			       &pipe_config->pipe_src_h);
>  
> -	for_each_connector_in_state(state, connector, connector_state, i) {
> +	for_each_new_connector_in_state(state, connector, connector_state, i) {
>  		if (connector_state->crtc != crtc)
>  			continue;
>  
> @@ -11355,7 +11356,7 @@ intel_modeset_pipe_config(struct drm_crtc *crtc,
>  	 * adjust it according to limitations or connector properties, and also
>  	 * a chance to reject the mode entirely.
>  	 */
> -	for_each_connector_in_state(state, connector, connector_state, i) {
> +	for_each_new_connector_in_state(state, connector, connector_state, i) {
>  		if (connector_state->crtc != crtc)
>  			continue;
>  
> @@ -11407,16 +11408,16 @@ static void
>  intel_modeset_update_crtc_state(struct drm_atomic_state *state)
>  {
>  	struct drm_crtc *crtc;
> -	struct drm_crtc_state *crtc_state;
> +	struct drm_crtc_state *new_crtc_state;
>  	int i;
>  
>  	/* Double check state. */
> -	for_each_crtc_in_state(state, crtc, crtc_state, i) {
> -		to_intel_crtc(crtc)->config = to_intel_crtc_state(crtc->state);
> +	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
> +		to_intel_crtc(crtc)->config = to_intel_crtc_state(new_crtc_state);
>  
>  		/* Update hwmode for vblank functions */
> -		if (crtc->state->active)
> -			crtc->hwmode = crtc->state->adjusted_mode;
> +		if (new_crtc_state->active)
> +			crtc->hwmode = new_crtc_state->adjusted_mode;
>  		else
>  			crtc->hwmode.crtc_clock = 0;
>  
> @@ -11889,19 +11890,18 @@ verify_connector_state(struct drm_device *dev,
>  		       struct drm_crtc *crtc)
>  {
>  	struct drm_connector *connector;
> -	struct drm_connector_state *old_conn_state;
> +	struct drm_connector_state *old_conn_state, *conn_state;
>  	int i;
>  
> -	for_each_connector_in_state(state, connector, old_conn_state, i) {
> +	for_each_oldnew_connector_in_state(state, connector, old_conn_state, conn_state, i) {

Giving conn_state the new_ prefix would have been nice, like you do below.

>  		struct drm_encoder *encoder = connector->encoder;
> -		struct drm_connector_state *state = connector->state;
>  
> -		if (state->crtc != crtc)
> +		if (conn_state->crtc != crtc)
>  			continue;
>  
>  		intel_connector_verify_state(to_intel_connector(connector));
>  
> -		I915_STATE_WARN(state->best_encoder != encoder,
> +		I915_STATE_WARN(conn_state->best_encoder != encoder,
>  		     "connector's atomic encoder doesn't match legacy encoder\n");
>  	}
>  }
> @@ -12187,21 +12187,21 @@ static void intel_modeset_clear_plls(struct drm_atomic_state *state)
>  	struct drm_device *dev = state->dev;
>  	struct drm_i915_private *dev_priv = to_i915(dev);
>  	struct drm_crtc *crtc;
> -	struct drm_crtc_state *crtc_state;
> +	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
>  	int i;
>  
>  	if (!dev_priv->display.crtc_compute_clock)
>  		return;
>  
> -	for_each_crtc_in_state(state, crtc, crtc_state, i) {
> +	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
>  		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>  		struct intel_shared_dpll *old_dpll =
> -			to_intel_crtc_state(crtc->state)->shared_dpll;
> +			to_intel_crtc_state(old_crtc_state)->shared_dpll;
>  
> -		if (!needs_modeset(crtc_state))
> +		if (!needs_modeset(new_crtc_state))
>  			continue;
>  
> -		to_intel_crtc_state(crtc_state)->shared_dpll = NULL;
> +		to_intel_crtc_state(new_crtc_state)->shared_dpll = NULL;
>  
>  		if (!old_dpll)
>  			continue;
> @@ -12227,7 +12227,7 @@ static int haswell_mode_set_planes_workaround(struct drm_atomic_state *state)
>  	int i;
>  
>  	/* look at all crtc's that are going to be enabled in during modeset */
> -	for_each_crtc_in_state(state, crtc, crtc_state, i) {
> +	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
>  		intel_crtc = to_intel_crtc(crtc);
>  
>  		if (!crtc_state->active || !needs_modeset(crtc_state))
> @@ -12329,7 +12329,7 @@ static int intel_modeset_checks(struct drm_atomic_state *state)
>  	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
>  	struct drm_i915_private *dev_priv = to_i915(state->dev);
>  	struct drm_crtc *crtc;
> -	struct drm_crtc_state *crtc_state;
> +	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
>  	int ret = 0, i;
>  
>  	if (!check_digital_port_conflicts(state)) {
> @@ -12342,13 +12342,13 @@ static int intel_modeset_checks(struct drm_atomic_state *state)
>  	intel_state->cdclk.logical = dev_priv->cdclk.logical;
>  	intel_state->cdclk.actual = dev_priv->cdclk.actual;
>  
> -	for_each_crtc_in_state(state, crtc, crtc_state, i) {
> -		if (crtc_state->active)
> +	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
> +		if (new_crtc_state->active)
>  			intel_state->active_crtcs |= 1 << i;
>  		else
>  			intel_state->active_crtcs &= ~(1 << i);
>  
> -		if (crtc_state->active != crtc->state->active)
> +		if (old_crtc_state->active != new_crtc_state->active)
>  			intel_state->active_pipe_changes |= drm_crtc_mask(crtc);
>  	}
>  
> @@ -12427,7 +12427,7 @@ static int intel_atomic_check(struct drm_device *dev,
>  	struct drm_i915_private *dev_priv = to_i915(dev);
>  	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
>  	struct drm_crtc *crtc;
> -	struct drm_crtc_state *crtc_state;
> +	struct drm_crtc_state *old_crtc_state, *crtc_state;
>  	int ret, i;
>  	bool any_ms = false;
>  
> @@ -12435,12 +12435,12 @@ static int intel_atomic_check(struct drm_device *dev,
>  	if (ret)
>  		return ret;
>  
> -	for_each_crtc_in_state(state, crtc, crtc_state, i) {
> +	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, crtc_state, i) {
>  		struct intel_crtc_state *pipe_config =
>  			to_intel_crtc_state(crtc_state);
>  
>  		/* Catch I915_MODE_FLAG_INHERITED */
> -		if (crtc_state->mode.private_flags != crtc->state->mode.private_flags)
> +		if (crtc_state->mode.private_flags != old_crtc_state->mode.private_flags)
>  			crtc_state->mode_changed = true;
>  
>  		if (!needs_modeset(crtc_state))
> @@ -12467,10 +12467,10 @@ static int intel_atomic_check(struct drm_device *dev,
>  
>  		if (i915.fastboot &&
>  		    intel_pipe_config_compare(dev_priv,
> -					to_intel_crtc_state(crtc->state),
> +					to_intel_crtc_state(old_crtc_state),
>  					pipe_config, true)) {
>  			crtc_state->mode_changed = false;
> -			to_intel_crtc_state(crtc_state)->update_pipe = true;
> +			pipe_config->update_pipe = true;
>  		}
>  
>  		if (needs_modeset(crtc_state))
> @@ -12510,7 +12510,7 @@ static int intel_atomic_prepare_commit(struct drm_device *dev,
>  	struct drm_crtc *crtc;
>  	int i, ret;
>  
> -	for_each_crtc_in_state(state, crtc, crtc_state, i) {
> +	for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
>  		if (state->legacy_cursor_update)
>  			continue;
>  
> @@ -12607,19 +12607,21 @@ static bool needs_vblank_wait(struct intel_crtc_state *crtc_state)
>  static void intel_update_crtc(struct drm_crtc *crtc,
>  			      struct drm_atomic_state *state,
>  			      struct drm_crtc_state *old_crtc_state,
> +			      struct drm_crtc_state *new_crtc_state,
>  			      unsigned int *crtc_vblank_mask)
>  {
>  	struct drm_device *dev = crtc->dev;
>  	struct drm_i915_private *dev_priv = to_i915(dev);
>  	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> -	struct intel_crtc_state *pipe_config = to_intel_crtc_state(crtc->state);
> -	bool modeset = needs_modeset(crtc->state);
> +	struct intel_crtc_state *pipe_config = to_intel_crtc_state(new_crtc_state);
> +	bool modeset = needs_modeset(new_crtc_state);
>  
>  	if (modeset) {
>  		update_scanline_offset(intel_crtc);
>  		dev_priv->display.crtc_enable(pipe_config, state);
>  	} else {
> -		intel_pre_plane_update(to_intel_crtc_state(old_crtc_state));
> +		intel_pre_plane_update(to_intel_crtc_state(old_crtc_state),
> +				       pipe_config);
>  	}
>  
>  	if (drm_atomic_get_existing_plane_state(state, crtc->primary)) {
> @@ -12638,15 +12640,15 @@ static void intel_update_crtcs(struct drm_atomic_state *state,
>  			       unsigned int *crtc_vblank_mask)
>  {
>  	struct drm_crtc *crtc;
> -	struct drm_crtc_state *old_crtc_state;
> +	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
>  	int i;
>  
> -	for_each_crtc_in_state(state, crtc, old_crtc_state, i) {
> -		if (!crtc->state->active)
> +	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
> +		if (!new_crtc_state->active)
>  			continue;
>  
>  		intel_update_crtc(crtc, state, old_crtc_state,
> -				  crtc_vblank_mask);
> +				  new_crtc_state, crtc_vblank_mask);
>  	}
>  }
>  
> @@ -12657,7 +12659,7 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
>  	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
>  	struct drm_crtc *crtc;
>  	struct intel_crtc *intel_crtc;
> -	struct drm_crtc_state *old_crtc_state;
> +	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
>  	struct intel_crtc_state *cstate;
>  	unsigned int updated = 0;
>  	bool progress;
> @@ -12666,9 +12668,9 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
>  
>  	const struct skl_ddb_entry *entries[I915_MAX_PIPES] = {};
>  
> -	for_each_crtc_in_state(state, crtc, old_crtc_state, i)
> +	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i)
>  		/* ignore allocations for crtc's that have been turned off. */
> -		if (crtc->state->active)
> +		if (new_crtc_state->active)
>  			entries[i] = &to_intel_crtc_state(old_crtc_state)->wm.skl.ddb;
>  
>  	/*
> @@ -12680,7 +12682,7 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
>  	do {
>  		progress = false;
>  
> -		for_each_crtc_in_state(state, crtc, old_crtc_state, i) {
> +		for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
>  			bool vbl_wait = false;
>  			unsigned int cmask = drm_crtc_mask(crtc);
>  
> @@ -12705,12 +12707,12 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
>  			 */
>  			if (!skl_ddb_entry_equal(&cstate->wm.skl.ddb,
>  						 &to_intel_crtc_state(old_crtc_state)->wm.skl.ddb) &&
> -			    !crtc->state->active_changed &&
> +			    !new_crtc_state->active_changed &&
>  			    intel_state->wm_results.dirty_pipes != updated)
>  				vbl_wait = true;
>  
>  			intel_update_crtc(crtc, state, old_crtc_state,
> -					  crtc_vblank_mask);
> +					  new_crtc_state, crtc_vblank_mask);
>  
>  			if (vbl_wait)
>  				intel_wait_for_vblank(dev_priv, pipe);
> @@ -12743,7 +12745,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
>  	struct drm_device *dev = state->dev;
>  	struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
>  	struct drm_i915_private *dev_priv = to_i915(dev);
> -	struct drm_crtc_state *old_crtc_state;
> +	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
>  	struct drm_crtc *crtc;
>  	struct intel_crtc_state *intel_cstate;
>  	bool hw_check = intel_state->modeset;
> @@ -12756,22 +12758,23 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
>  	if (intel_state->modeset)
>  		intel_display_power_get(dev_priv, POWER_DOMAIN_MODESET);
>  
> -	for_each_crtc_in_state(state, crtc, old_crtc_state, i) {
> +	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
>  		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>  
> -		if (needs_modeset(crtc->state) ||
> -		    to_intel_crtc_state(crtc->state)->update_pipe) {
> +		if (needs_modeset(new_crtc_state) ||
> +		    to_intel_crtc_state(new_crtc_state)->update_pipe) {
>  			hw_check = true;
>  
>  			put_domains[to_intel_crtc(crtc)->pipe] =
>  				modeset_get_crtc_power_domains(crtc,
> -					to_intel_crtc_state(crtc->state));
> +					to_intel_crtc_state(new_crtc_state));
>  		}
>  
> -		if (!needs_modeset(crtc->state))
> +		if (!needs_modeset(new_crtc_state))
>  			continue;
>  
> -		intel_pre_plane_update(to_intel_crtc_state(old_crtc_state));
> +		intel_pre_plane_update(to_intel_crtc_state(old_crtc_state),
> +				       to_intel_crtc_state(new_crtc_state));
>  
>  		if (old_crtc_state->active) {
>  			intel_crtc_disable_planes(crtc, old_crtc_state->plane_mask);
> @@ -12821,16 +12824,16 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
>  	}
>  
>  	/* Complete the events for pipes that have now been disabled */
> -	for_each_crtc_in_state(state, crtc, old_crtc_state, i) {
> -		bool modeset = needs_modeset(crtc->state);
> +	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
> +		bool modeset = needs_modeset(new_crtc_state);
>  
>  		/* Complete events for now disable pipes here. */
> -		if (modeset && !crtc->state->active && crtc->state->event) {
> +		if (modeset && !new_crtc_state->active && new_crtc_state->event) {
>  			spin_lock_irq(&dev->event_lock);
> -			drm_crtc_send_vblank_event(crtc, crtc->state->event);
> +			drm_crtc_send_vblank_event(crtc, new_crtc_state->event);
>  			spin_unlock_irq(&dev->event_lock);
>  
> -			crtc->state->event = NULL;
> +			new_crtc_state->event = NULL;
>  		}
>  	}
>  
> @@ -12856,21 +12859,21 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
>  	 *
>  	 * TODO: Move this (and other cleanup) to an async worker eventually.
>  	 */
> -	for_each_crtc_in_state(state, crtc, old_crtc_state, i) {
> -		intel_cstate = to_intel_crtc_state(crtc->state);
> +	for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
> +		intel_cstate = to_intel_crtc_state(new_crtc_state);
>  
>  		if (dev_priv->display.optimize_watermarks)
>  			dev_priv->display.optimize_watermarks(intel_state,
>  							      intel_cstate);
>  	}
>  
> -	for_each_crtc_in_state(state, crtc, old_crtc_state, i) {
> +	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
>  		intel_post_plane_update(to_intel_crtc_state(old_crtc_state));
>  
>  		if (put_domains[i])
>  			modeset_put_power_domains(dev_priv, put_domains[i]);
>  
> -		intel_modeset_verify_crtc(crtc, state, old_crtc_state, crtc->state);
> +		intel_modeset_verify_crtc(crtc, state, old_crtc_state, new_crtc_state);
>  	}
>  
>  	if (intel_state->modeset && intel_can_enable_sagv(state))
> @@ -12942,13 +12945,13 @@ intel_atomic_commit_ready(struct i915_sw_fence *fence,
>  
>  static void intel_atomic_track_fbs(struct drm_atomic_state *state)
>  {
> -	struct drm_plane_state *old_plane_state;
> +	struct drm_plane_state *old_plane_state, *new_plane_state;
>  	struct drm_plane *plane;
>  	int i;
>  
> -	for_each_plane_in_state(state, plane, old_plane_state, i)
> +	for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i)
>  		i915_gem_track_fb(intel_fb_obj(old_plane_state->fb),
> -				  intel_fb_obj(plane->state->fb),
> +				  intel_fb_obj(new_plane_state->fb),
>  				  to_intel_plane(plane)->frontbuffer_bit);
>  }
>  
> @@ -14890,7 +14893,7 @@ static void sanitize_watermarks(struct drm_device *dev)
>  	}
>  
>  	/* Write calculated watermark values back */
> -	for_each_crtc_in_state(state, crtc, cstate, i) {
> +	for_each_new_crtc_in_state(state, crtc, cstate, i) {
>  		struct intel_crtc_state *cs = to_intel_crtc_state(cstate);
>  
>  		cs->wm.need_postvbl_update = true;

Yeah, the new iterators are definitely much, much better. I tried to read
it all carefully (really, intel_display.c should be split a lot), and
didn't find any real bugs. A bit more consistency with old/new, when we
mix them, would be great though.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx