3  * R-Car Display Unit Planes
33  * The core idea is to avoid using a free planes bitmask that would need to be
36  * over all plane states to compute the free planes bitmask, allocates hardware
37  * planes based on that bitmask, and stores the result back in the plane states.
39  * For this to work we need to access the current state of planes not touched by
41  * planes using drm_atomic_get_plane_state(). This effectively serializes atomic
55 	 * Lowering the number of planes doesn't strictly require reallocation  in rcar_du_plane_needs_realloc()
60 	    old_state->format->planes != new_state->format->planes)  in rcar_du_plane_needs_realloc()
63 	/* Reallocate hardware planes if the source has changed. */  in rcar_du_plane_needs_realloc()
78 	if (state->format->planes == 2)  in rcar_du_plane_hwmask()
90  * and allocate planes in reverse index order otherwise to ensure maximum
91  * availability of planes 0 and 1.
100 	unsigned int num_planes = state->format->planes;  in rcar_du_plane_hwalloc()
142 	/* Check if hardware planes need to be reallocated. */  in rcar_du_atomic_check_planes()
155 			plane->group->index, plane - plane->group->planes);  in rcar_du_atomic_check_planes()
165 			index = plane - plane->group->planes;  in rcar_du_atomic_check_planes()
181 			index = plane - plane->group->planes;  in rcar_du_atomic_check_planes()
196 	 * Compute the used planes mask for each group at the same time to avoid  in rcar_du_atomic_check_planes()
197 	 * looping over the planes separately later.  in rcar_du_atomic_check_planes()
204 		dev_dbg(rcdu->dev, "%s: finding free planes for group %u\n",  in rcar_du_atomic_check_planes()
208 			struct rcar_du_plane *plane = &group->planes[i];  in rcar_du_atomic_check_planes()
218 			 * hardware planes must not be added to the used planes  in rcar_du_atomic_check_planes()
221 			 * above. Use the local freed planes list to check for  in rcar_du_atomic_check_planes()
228 					plane - plane->group->planes);  in rcar_du_atomic_check_planes()
238 				plane - plane->group->planes,  in rcar_du_atomic_check_planes()
240 				new_plane_state->format->planes : 0,  in rcar_du_atomic_check_planes()
247 		dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",  in rcar_du_atomic_check_planes()
251 	/* Reallocate hardware planes for each plane that needs it. */  in rcar_du_atomic_check_planes()
266 			plane->group->index, plane - plane->group->planes);  in rcar_du_atomic_check_planes()
269 		 * Skip planes that are being disabled or don't need to be  in rcar_du_atomic_check_planes()
277 		 * Try to allocate the plane from the free planes currently  in rcar_du_atomic_check_planes()
280 		 * allocating from all free planes.  in rcar_du_atomic_check_planes()
299 			__func__, new_plane_state->format->planes, idx);  in rcar_du_atomic_check_planes()
306 		dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",  in rcar_du_atomic_check_planes()
347 		if (state->format->planes == 2)  in rcar_du_plane_setup_scanout()
352 		for (i = 0; i < state->format->planes; ++i) {  in rcar_du_plane_setup_scanout()
389 	if (state->format->planes == 2) {  in rcar_du_plane_setup_scanout()
481 	if (state->format->planes == 2) {  in rcar_du_plane_setup_format_gen2()
523 	 * On Gen3, some DU channels have two planes, each being wired to a  in rcar_du_plane_setup_format_gen3()
524 	 * separate VSPD instance. The DU can then blend two planes. While  in rcar_du_plane_setup_format_gen3()
526 	 * blending (such as incorrect colors or planes being invisible) may  in rcar_du_plane_setup_format_gen3()
567 	if (state->format->planes == 2)  in __rcar_du_plane_setup()
794 	  * planes.  in rcar_du_planes_init()
804 		struct rcar_du_plane *plane = &rgrp->planes[i];  in rcar_du_planes_init()