3  * rcar_du_plane.c  --  R-Car Display Unit Planes
32  * The core idea is to avoid using a free planes bitmask that would need to be
35  * over all plane states to compute the free planes bitmask, allocates hardware
36  * planes based on that bitmask, and stores the result back in the plane states.
38  * For this to work we need to access the current state of planes not touched by
40  * planes using drm_atomic_get_plane_state(). This effectively serializes atomic
54 	 * Lowering the number of planes doesn't strictly require reallocation  in rcar_du_plane_needs_realloc()
59 	    old_state->format->planes != new_state->format->planes)  in rcar_du_plane_needs_realloc()
62 	/* Reallocate hardware planes if the source has changed. */  in rcar_du_plane_needs_realloc()
77 	if (state->format->planes == 2)  in rcar_du_plane_hwmask()
89  * and allocate planes in reverse index order otherwise to ensure maximum
90  * availability of planes 0 and 1.
99 	unsigned int num_planes = state->format->planes;  in rcar_du_plane_hwalloc()
141 	/* Check if hardware planes need to be reallocated. */  in rcar_du_atomic_check_planes()
154 			plane->group->index, plane - plane->group->planes);  in rcar_du_atomic_check_planes()
164 			index = plane - plane->group->planes;  in rcar_du_atomic_check_planes()
180 			index = plane - plane->group->planes;  in rcar_du_atomic_check_planes()
195 	 * Compute the used planes mask for each group at the same time to avoid  in rcar_du_atomic_check_planes()
196 	 * looping over the planes separately later.  in rcar_du_atomic_check_planes()
203 		dev_dbg(rcdu->dev, "%s: finding free planes for group %u\n",  in rcar_du_atomic_check_planes()
207 			struct rcar_du_plane *plane = &group->planes[i];  in rcar_du_atomic_check_planes()
217 			 * hardware planes must not be added to the used planes  in rcar_du_atomic_check_planes()
220 			 * above. Use the local freed planes list to check for  in rcar_du_atomic_check_planes()
227 					plane - plane->group->planes);  in rcar_du_atomic_check_planes()
237 				plane - plane->group->planes,  in rcar_du_atomic_check_planes()
239 				new_plane_state->format->planes : 0,  in rcar_du_atomic_check_planes()
246 		dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",  in rcar_du_atomic_check_planes()
250 	/* Reallocate hardware planes for each plane that needs it. */  in rcar_du_atomic_check_planes()
265 			plane->group->index, plane - plane->group->planes);  in rcar_du_atomic_check_planes()
268 		 * Skip planes that are being disabled or don't need to be  in rcar_du_atomic_check_planes()
276 		 * Try to allocate the plane from the free planes currently  in rcar_du_atomic_check_planes()
279 		 * allocating from all free planes.  in rcar_du_atomic_check_planes()
298 			__func__, new_plane_state->format->planes, idx);  in rcar_du_atomic_check_planes()
305 		dev_dbg(rcdu->dev, "%s: group %u free planes mask 0x%02x\n",  in rcar_du_atomic_check_planes()
346 		if (state->format->planes == 2)  in rcar_du_plane_setup_scanout()
351 		for (i = 0; i < state->format->planes; ++i) {  in rcar_du_plane_setup_scanout()
388 	if (state->format->planes == 2) {  in rcar_du_plane_setup_scanout()
480 	if (state->format->planes == 2) {  in rcar_du_plane_setup_format_gen2()
548 	if (state->format->planes == 2)  in __rcar_du_plane_setup()
767 	  * planes.  in rcar_du_planes_init()
777 		struct rcar_du_plane *plane = &rgrp->planes[i];  in rcar_du_planes_init()