1/* SPDX-License-Identifier: GPL-2.0+ */
  2/*
  3 * Copyright (C) 2022 Amarula Solutions(India)
  4 * Author: Jagan Teki <jagan@amarulasolutions.com>
  5 */
  6
  7#ifndef __SAMSUNG_DSIM__
  8#define __SAMSUNG_DSIM__
  9
 10#include <linux/gpio/consumer.h>
 11#include <linux/regulator/consumer.h>
 12
 13#include <drm/drm_atomic_helper.h>
 14#include <drm/drm_of.h>
 15#include <drm/drm_mipi_dsi.h>
 16
 17struct samsung_dsim;
 18
 19#define DSIM_STATE_ENABLED		BIT(0)
 20#define DSIM_STATE_INITIALIZED		BIT(1)
 21#define DSIM_STATE_CMD_LPM		BIT(2)
 22#define DSIM_STATE_VIDOUT_AVAILABLE	BIT(3)
 23
 24enum samsung_dsim_type {
 25	DSIM_TYPE_EXYNOS3250,
 26	DSIM_TYPE_EXYNOS4210,
 27	DSIM_TYPE_EXYNOS5410,
 28	DSIM_TYPE_EXYNOS5422,
 29	DSIM_TYPE_EXYNOS5433,
 30	DSIM_TYPE_IMX8MM,
 31	DSIM_TYPE_IMX8MP,
 32	DSIM_TYPE_COUNT,
 33};
 34
 35#define samsung_dsim_hw_is_exynos(hw) \
 36	((hw) >= DSIM_TYPE_EXYNOS3250 && (hw) <= DSIM_TYPE_EXYNOS5433)
 37
 38struct samsung_dsim_transfer {
 39	struct list_head list;
 40	struct completion completed;
 41	int result;
 42	struct mipi_dsi_packet packet;
 43	u16 flags;
 44	u16 tx_done;
 45
 46	u8 *rx_payload;
 47	u16 rx_len;
 48	u16 rx_done;
 49};
 50
 51struct samsung_dsim_driver_data {
 52	const unsigned int *reg_ofs;
 53	unsigned int plltmr_reg;
 54	unsigned int has_freqband:1;
 55	unsigned int has_clklane_stop:1;
 56	unsigned int has_broken_fifoctrl_emptyhdr:1;
 57	unsigned int num_clks;
 58	unsigned int min_freq;
 59	unsigned int max_freq;
 60	unsigned int wait_for_reset;
 61	unsigned int num_bits_resol;
 62	unsigned int pll_p_offset;
 63	const unsigned int *reg_values;
 64	unsigned int pll_fin_min;
 65	unsigned int pll_fin_max;
 66	u16 m_min;
 67	u16 m_max;
 68};
 69
 70struct samsung_dsim_host_ops {
 71	int (*register_host)(struct samsung_dsim *dsim);
 72	void (*unregister_host)(struct samsung_dsim *dsim);
 73	int (*attach)(struct samsung_dsim *dsim, struct mipi_dsi_device *device);
 74	void (*detach)(struct samsung_dsim *dsim, struct mipi_dsi_device *device);
 75	irqreturn_t (*te_irq_handler)(struct samsung_dsim *dsim);
 76};
 77
 78struct samsung_dsim_plat_data {
 79	enum samsung_dsim_type hw_type;
 80	const struct samsung_dsim_host_ops *host_ops;
 81};
 82
 83struct samsung_dsim {
 84	struct mipi_dsi_host dsi_host;
 85	struct drm_bridge bridge;
 86	struct drm_bridge *out_bridge;
 87	struct device *dev;
 88	struct drm_display_mode mode;
 89
 90	void __iomem *reg_base;
 91	struct phy *phy;
 92	struct clk **clks;
 93	struct clk *pll_clk;
 94	struct regulator_bulk_data supplies[2];
 95	int irq;
 96	struct gpio_desc *te_gpio;
 97
 98	u32 pll_clk_rate;
 99	u32 burst_clk_rate;
100	u32 hs_clock;
101	u32 esc_clk_rate;
102	u32 lanes;
103	u32 mode_flags;
104	u32 format;
105
106	bool swap_dn_dp_clk;
107	bool swap_dn_dp_data;
108	int state;
109	struct drm_property *brightness;
110	struct completion completed;
111
112	spinlock_t transfer_lock; /* protects transfer_list */
113	struct list_head transfer_list;
114
115	const struct samsung_dsim_driver_data *driver_data;
116	const struct samsung_dsim_plat_data *plat_data;
117
118	void *priv;
119};
120
121extern int samsung_dsim_probe(struct platform_device *pdev);
122extern void samsung_dsim_remove(struct platform_device *pdev);
123extern const struct dev_pm_ops samsung_dsim_pm_ops;
124
125#endif /* __SAMSUNG_DSIM__ */