drm/msm/mdp5: Start using parameters from CRTC state

In the last few commits, we've been adding params to mdp5_crtc_state, and
assigning them in the atomic_check() funcs. Now it's time to actually
start using them.

Remove the duplicated params from the mdp5_crtc struct, and start using
them in the mdp5_crtc code. The majority of the references to these params
is in code that executes after the atomic swap has occurred, so it's okay
to use crtc->state in them. There are a couple of legacy LM cursor ops that
may not use the updated state, but (I think) it's okay to live with that.

Now that we dynamically allocate a mixer to the CRTC, we can also remove
the static assignment to it in mdp5_crtc_init, and also drop the code that
skipped init-ing WB bound mixers (those will now be rejected by
mdp5_mixer_assign()).
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c

@@ -849,10 +849,6 @@ static int hwmixer_init(struct mdp5_kms *mdp5_kms)
 			return ret;
 		}
 
-		/* Don't create LMs connected to WB for now */
-		if (!mixer)
-			continue;
-
 		mixer->idx = mdp5_kms->num_hwmixers;
 		mdp5_kms->hwmixers[mdp5_kms->num_hwmixers++] = mixer;
 	}

drivers/gpu/drm/msm/mdp/mdp5/mdp5_mixer.c

@@ -84,10 +84,6 @@ struct mdp5_hw_mixer *mdp5_mixer_init(const struct mdp5_lm_instance *lm)
 {
 	struct mdp5_hw_mixer *mixer;
 
-	/* ignore WB bound mixers for now */
-	if (lm->caps & MDP_LM_CAP_WB)
-		return NULL;
-
 	mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
 	if (!mixer)
 		return ERR_PTR(-ENOMEM);