xref: /openbmc/linux/drivers/gpu/drm/msm/dsi/phy/dsi_phy.h (revision 217188d9)
1 /*
2  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 and
6  * only version 2 as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  */
13 
14 #ifndef __DSI_PHY_H__
15 #define __DSI_PHY_H__
16 
17 #include <linux/regulator/consumer.h>
18 
19 #include "dsi.h"
20 
21 #define dsi_phy_read(offset) msm_readl((offset))
22 #define dsi_phy_write(offset, data) msm_writel((data), (offset))
23 
24 struct msm_dsi_phy_ops {
25 	int (*init) (struct msm_dsi_phy *phy);
26 	int (*enable)(struct msm_dsi_phy *phy, int src_pll_id,
27 			struct msm_dsi_phy_clk_request *clk_req);
28 	void (*disable)(struct msm_dsi_phy *phy);
29 };
30 
31 struct msm_dsi_phy_cfg {
32 	enum msm_dsi_phy_type type;
33 	struct dsi_reg_config reg_cfg;
34 	struct msm_dsi_phy_ops ops;
35 
36 	/*
37 	 * Each cell {phy_id, pll_id} of the truth table indicates
38 	 * if the source PLL selection bit should be set for each PHY.
39 	 * Fill default H/W values in illegal cells, eg. cell {0, 1}.
40 	 */
41 	bool src_pll_truthtable[DSI_MAX][DSI_MAX];
42 	const resource_size_t io_start[DSI_MAX];
43 	const int num_dsi_phy;
44 };
45 
46 extern const struct msm_dsi_phy_cfg dsi_phy_28nm_hpm_cfgs;
47 extern const struct msm_dsi_phy_cfg dsi_phy_28nm_lp_cfgs;
48 extern const struct msm_dsi_phy_cfg dsi_phy_20nm_cfgs;
49 extern const struct msm_dsi_phy_cfg dsi_phy_28nm_8960_cfgs;
50 extern const struct msm_dsi_phy_cfg dsi_phy_14nm_cfgs;
51 extern const struct msm_dsi_phy_cfg dsi_phy_10nm_cfgs;
52 
53 struct msm_dsi_dphy_timing {
54 	u32 clk_pre;
55 	u32 clk_post;
56 	u32 clk_zero;
57 	u32 clk_trail;
58 	u32 clk_prepare;
59 	u32 hs_exit;
60 	u32 hs_zero;
61 	u32 hs_prepare;
62 	u32 hs_trail;
63 	u32 hs_rqst;
64 	u32 ta_go;
65 	u32 ta_sure;
66 	u32 ta_get;
67 
68 	struct msm_dsi_phy_shared_timings shared_timings;
69 
70 	/* For PHY v2 only */
71 	u32 hs_rqst_ckln;
72 	u32 hs_prep_dly;
73 	u32 hs_prep_dly_ckln;
74 	u8 hs_halfbyte_en;
75 	u8 hs_halfbyte_en_ckln;
76 };
77 
78 struct msm_dsi_phy {
79 	struct platform_device *pdev;
80 	void __iomem *base;
81 	void __iomem *reg_base;
82 	void __iomem *lane_base;
83 	int id;
84 
85 	struct clk *ahb_clk;
86 	struct regulator_bulk_data supplies[DSI_DEV_REGULATOR_MAX];
87 
88 	struct msm_dsi_dphy_timing timing;
89 	const struct msm_dsi_phy_cfg *cfg;
90 
91 	enum msm_dsi_phy_usecase usecase;
92 	bool regulator_ldo_mode;
93 
94 	struct msm_dsi_pll *pll;
95 };
96 
97 /*
98  * PHY internal functions
99  */
100 int msm_dsi_dphy_timing_calc(struct msm_dsi_dphy_timing *timing,
101 			     struct msm_dsi_phy_clk_request *clk_req);
102 int msm_dsi_dphy_timing_calc_v2(struct msm_dsi_dphy_timing *timing,
103 				struct msm_dsi_phy_clk_request *clk_req);
104 int msm_dsi_dphy_timing_calc_v3(struct msm_dsi_dphy_timing *timing,
105 				struct msm_dsi_phy_clk_request *clk_req);
106 void msm_dsi_phy_set_src_pll(struct msm_dsi_phy *phy, int pll_id, u32 reg,
107 				u32 bit_mask);
108 int msm_dsi_phy_init_common(struct msm_dsi_phy *phy);
109 
110 #endif /* __DSI_PHY_H__ */
111 
112