/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * R-Car Display Unit DRM driver
 *
 * Copyright (C) 2013-2015 Renesas Electronics Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 */

#ifndef __RCAR_DU_DRV_H__
#define __RCAR_DU_DRV_H__

#include <linux/kernel.h>
#include <linux/wait.h>

#include <drm/drm_device.h>

#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_group.h"
#include "rcar_du_vsp.h"

struct clk;
struct device;
struct drm_bridge;
struct drm_property;
struct rcar_du_device;

#define RCAR_DU_FEATURE_CRTC_IRQ	BIT(0)	/* Per-CRTC IRQ */
#define RCAR_DU_FEATURE_CRTC_CLOCK	BIT(1)	/* Per-CRTC clock */
#define RCAR_DU_FEATURE_VSP1_SOURCE	BIT(2)	/* Has inputs from VSP1 */
#define RCAR_DU_FEATURE_INTERLACED	BIT(3)	/* HW supports interlaced */
#define RCAR_DU_FEATURE_TVM_SYNC	BIT(4)	/* Has TV switch/sync modes */

#define RCAR_DU_QUIRK_ALIGN_128B	BIT(0)	/* Align pitches to 128 bytes */

enum rcar_du_output {
	RCAR_DU_OUTPUT_DPAD0,
	RCAR_DU_OUTPUT_DPAD1,
	RCAR_DU_OUTPUT_DSI0,
	RCAR_DU_OUTPUT_DSI1,
	RCAR_DU_OUTPUT_HDMI0,
	RCAR_DU_OUTPUT_HDMI1,
	RCAR_DU_OUTPUT_LVDS0,
	RCAR_DU_OUTPUT_LVDS1,
	RCAR_DU_OUTPUT_TCON,
	RCAR_DU_OUTPUT_MAX,
};

/*
 * struct rcar_du_output_routing - Output routing specification
 * @possible_crtcs: bitmask of possible CRTCs for the output
 * @port: device tree port number corresponding to this output route
 *
 * The DU has 5 possible outputs (DPAD0/1, LVDS0/1, TCON). Output routing data
 * specify the valid SoC outputs, which CRTCs can drive the output, and the type
 * of in-SoC encoder for the output.
 */
struct rcar_du_output_routing {
	unsigned int possible_crtcs;
	unsigned int port;
};

/*
 * struct rcar_du_device_info - DU model-specific information
 * @gen: device generation (2 or 3)
 * @features: device features (RCAR_DU_FEATURE_*)
 * @quirks: device quirks (RCAR_DU_QUIRK_*)
 * @channels_mask: bit mask of available DU channels
 * @routes: array of CRTC to output routes, indexed by output (RCAR_DU_OUTPUT_*)
 * @num_lvds: number of internal LVDS encoders
 * @num_rpf: number of RPFs in VSP
 * @dpll_mask: bit mask of DU channels equipped with a DPLL
 * @dsi_clk_mask: bitmask of channels that can use the DSI clock as dot clock
 * @lvds_clk_mask: bitmask of channels that can use the LVDS clock as dot clock
 */
struct rcar_du_device_info {
	unsigned int gen;
	unsigned int features;
	unsigned int quirks;
	unsigned int channels_mask;
	struct rcar_du_output_routing routes[RCAR_DU_OUTPUT_MAX];
	unsigned int num_lvds;
	unsigned int num_rpf;
	unsigned int dpll_mask;
	unsigned int dsi_clk_mask;
	unsigned int lvds_clk_mask;
};

#define RCAR_DU_MAX_CRTCS		4
#define RCAR_DU_MAX_GROUPS		DIV_ROUND_UP(RCAR_DU_MAX_CRTCS, 2)
#define RCAR_DU_MAX_VSPS		4
#define RCAR_DU_MAX_LVDS		2

struct rcar_du_device {
	struct device *dev;
	const struct rcar_du_device_info *info;

	void __iomem *mmio;

	struct drm_device ddev;

	struct rcar_du_crtc crtcs[RCAR_DU_MAX_CRTCS];
	unsigned int num_crtcs;

	struct rcar_du_group groups[RCAR_DU_MAX_GROUPS];
	struct platform_device *cmms[RCAR_DU_MAX_CRTCS];
	struct rcar_du_vsp vsps[RCAR_DU_MAX_VSPS];
	struct drm_bridge *lvds[RCAR_DU_MAX_LVDS];

	struct {
		struct drm_property *colorkey;
	} props;

	unsigned int dpad0_source;
	unsigned int dpad1_source;
	unsigned int vspd1_sink;
};

static inline struct rcar_du_device *to_rcar_du_device(struct drm_device *dev)
{
	return container_of(dev, struct rcar_du_device, ddev);
}

static inline bool rcar_du_has(struct rcar_du_device *rcdu,
			       unsigned int feature)
{
	return rcdu->info->features & feature;
}

static inline bool rcar_du_needs(struct rcar_du_device *rcdu,
				 unsigned int quirk)
{
	return rcdu->info->quirks & quirk;
}

static inline u32 rcar_du_read(struct rcar_du_device *rcdu, u32 reg)
{
	return ioread32(rcdu->mmio + reg);
}

static inline void rcar_du_write(struct rcar_du_device *rcdu, u32 reg, u32 data)
{
	iowrite32(data, rcdu->mmio + reg);
}

const char *rcar_du_output_name(enum rcar_du_output output);

#endif /* __RCAR_DU_DRV_H__ */