alistair23-linux/drivers/gpu/drm/imx/dpu/dpu-plane.h

/*
 * Copyright 2017-2019 NXP
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 */

#ifndef __DPU_PLANE_H__
#define __DPU_PLANE_H__

#include <video/dpu.h>
#include "../imx-drm.h"

#define MAX_DPU_PLANE_GRP	(MAX_CRTC / 2)

enum dpu_plane_src_type {
	DPU_PLANE_SRC_FL,
	DPU_PLANE_SRC_FW,
	DPU_PLANE_SRC_FD,
};

struct dpu_plane {
	struct drm_plane	base;
	struct dpu_plane_grp	*grp;
	struct list_head	head;
	unsigned int		stream_id;
};

struct dpu_plane_state {
	struct drm_plane_state	base;
	lb_prim_sel_t		stage;
	lb_sec_sel_t		source;
	dpu_block_id_t		blend;
	lb_prim_sel_t		aux_stage;
	lb_sec_sel_t		aux_source;
	dpu_block_id_t		aux_blend;

	bool			is_top;
	bool			use_prefetch;
	bool			use_aux_prefetch;
	bool			need_aux_source;

	/* used when pixel combiner is needed */
	unsigned int		left_src_w;
	unsigned int		left_crtc_w;
	unsigned int		left_crtc_x;
	unsigned int		right_src_w;
	unsigned int		right_crtc_w;
	unsigned int		right_crtc_x;

	bool			is_left_top;
	bool			is_right_top;
};

static const lb_prim_sel_t cf_stages[] = {LB_PRIM_SEL__CONSTFRAME0,
					  LB_PRIM_SEL__CONSTFRAME1};
static const lb_prim_sel_t stages[] = {LB_PRIM_SEL__LAYERBLEND0,
				       LB_PRIM_SEL__LAYERBLEND1,
				       LB_PRIM_SEL__LAYERBLEND2,
				       LB_PRIM_SEL__LAYERBLEND3};
/* TODO: Add source entries for subsidiary layers. */
static const lb_sec_sel_t sources[] = {LB_SEC_SEL__FETCHLAYER0,
				       LB_SEC_SEL__FETCHWARP2,
				       LB_SEC_SEL__FETCHDECODE0,
				       LB_SEC_SEL__FETCHDECODE1};
static const dpu_block_id_t blends[] = {ID_LAYERBLEND0, ID_LAYERBLEND1,
					ID_LAYERBLEND2, ID_LAYERBLEND3};

static inline struct dpu_plane *to_dpu_plane(struct drm_plane *plane)
{
	return container_of(plane, struct dpu_plane, base);
}

static inline struct dpu_plane_state *
to_dpu_plane_state(struct drm_plane_state *plane_state)
{
	return container_of(plane_state, struct dpu_plane_state, base);
}

static inline int source_to_type(lb_sec_sel_t source)
{
	switch (source) {
	case LB_SEC_SEL__FETCHLAYER0:
		return DPU_PLANE_SRC_FL;
	case LB_SEC_SEL__FETCHWARP2:
		return DPU_PLANE_SRC_FW;
	case LB_SEC_SEL__FETCHDECODE0:
	case LB_SEC_SEL__FETCHDECODE1:
		return DPU_PLANE_SRC_FD;
	default:
		break;
	}

	WARN_ON(1);
	return -EINVAL;
}

static inline int source_to_id(lb_sec_sel_t source)
{
	int i, offset = 0;
	int type = source_to_type(source);

	for (i = 0; i < ARRAY_SIZE(sources); i++) {
		if (source != sources[i])
			continue;

		/* FetchLayer */
		if (type == DPU_PLANE_SRC_FL)
			return i;

		/* FetchWarp or FetchDecode */
		while (offset < ARRAY_SIZE(sources)) {
			if (source_to_type(sources[offset]) == type)
				break;
			offset++;
		}
		return i - offset;
	}

	WARN_ON(1);
	return -EINVAL;
}

static inline struct dpu_fetchunit *
source_to_fu(struct dpu_plane_res *res, lb_sec_sel_t source)
{
	int fu_type = source_to_type(source);
	int fu_id = source_to_id(source);

	if (fu_type < 0 || fu_id < 0)
		return NULL;

	switch (fu_type) {
	case DPU_PLANE_SRC_FD:
		return res->fd[fu_id];
	case DPU_PLANE_SRC_FL:
		return res->fl[fu_id];
	case DPU_PLANE_SRC_FW:
		return res->fw[fu_id];
	}

	return NULL;
}

static inline struct dpu_fetchunit *
dpstate_to_fu(struct dpu_plane_state *dpstate)
{
	struct drm_plane *plane = dpstate->base.plane;
	struct dpu_plane *dplane = to_dpu_plane(plane);
	struct dpu_plane_res *res = &dplane->grp->res;

	return source_to_fu(res, dpstate->source);
}

static inline int blend_to_id(dpu_block_id_t blend)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(blends); i++) {
		if (blend == blends[i])
			return i;
	}

	WARN_ON(1);
	return -EINVAL;
}

static inline bool drm_format_is_yuv(uint32_t format)
{
	switch (format) {
	case DRM_FORMAT_YUYV:
	case DRM_FORMAT_UYVY:
	case DRM_FORMAT_NV12:
	case DRM_FORMAT_NV21:
		return true;
	default:
		break;
	}

	return false;
}

struct dpu_plane *dpu_plane_create(struct drm_device *drm,
				   unsigned int possible_crtcs,
				   unsigned int stream_id,
				   struct dpu_plane_grp *grp,
				   enum drm_plane_type type);
#endif