1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (C) 2018 Linus Walleij <linus.walleij@linaro.org>
4  * Parts of this file were based on the MCDE driver by Marcus Lorentzon
5  * (C) ST-Ericsson SA 2013
6  */
7 #include <drm/drm_simple_kms_helper.h>
8 
9 #ifndef _MCDE_DRM_H_
10 #define _MCDE_DRM_H_
11 
12 /* Shared basic registers */
13 #define MCDE_CR 0x00000000
14 #define MCDE_CR_IFIFOEMPTYLINECOUNT_V422_SHIFT 0
15 #define MCDE_CR_IFIFOEMPTYLINECOUNT_V422_MASK 0x0000003F
16 #define MCDE_CR_IFIFOCTRLEN BIT(15)
17 #define MCDE_CR_UFRECOVERY_MODE_V422 BIT(16)
18 #define MCDE_CR_WRAP_MODE_V422_SHIFT BIT(17)
19 #define MCDE_CR_AUTOCLKG_EN BIT(30)
20 #define MCDE_CR_MCDEEN BIT(31)
21 
22 #define MCDE_CONF0 0x00000004
23 #define MCDE_CONF0_SYNCMUX0 BIT(0)
24 #define MCDE_CONF0_SYNCMUX1 BIT(1)
25 #define MCDE_CONF0_SYNCMUX2 BIT(2)
26 #define MCDE_CONF0_SYNCMUX3 BIT(3)
27 #define MCDE_CONF0_SYNCMUX4 BIT(4)
28 #define MCDE_CONF0_SYNCMUX5 BIT(5)
29 #define MCDE_CONF0_SYNCMUX6 BIT(6)
30 #define MCDE_CONF0_SYNCMUX7 BIT(7)
31 #define MCDE_CONF0_IFIFOCTRLWTRMRKLVL_SHIFT 12
32 #define MCDE_CONF0_IFIFOCTRLWTRMRKLVL_MASK 0x00007000
33 #define MCDE_CONF0_OUTMUX0_SHIFT 16
34 #define MCDE_CONF0_OUTMUX0_MASK 0x00070000
35 #define MCDE_CONF0_OUTMUX1_SHIFT 19
36 #define MCDE_CONF0_OUTMUX1_MASK 0x00380000
37 #define MCDE_CONF0_OUTMUX2_SHIFT 22
38 #define MCDE_CONF0_OUTMUX2_MASK 0x01C00000
39 #define MCDE_CONF0_OUTMUX3_SHIFT 25
40 #define MCDE_CONF0_OUTMUX3_MASK 0x0E000000
41 #define MCDE_CONF0_OUTMUX4_SHIFT 28
42 #define MCDE_CONF0_OUTMUX4_MASK 0x70000000
43 
44 #define MCDE_SSP 0x00000008
45 #define MCDE_AIS 0x00000100
46 #define MCDE_IMSCERR 0x00000110
47 #define MCDE_RISERR 0x00000120
48 #define MCDE_MISERR 0x00000130
49 #define MCDE_SISERR 0x00000140
50 
51 enum mcde_flow_mode {
52 	/* One-shot mode: flow stops after one frame */
53 	MCDE_COMMAND_ONESHOT_FLOW,
54 	/* Command mode with tearing effect (TE) IRQ sync */
55 	MCDE_COMMAND_TE_FLOW,
56 	/*
57 	 * Command mode with bus turn-around (BTA) and tearing effect
58 	 * (TE) IRQ sync.
59 	 */
60 	MCDE_COMMAND_BTA_TE_FLOW,
61 	/* Video mode with tearing effect (TE) sync IRQ */
62 	MCDE_VIDEO_TE_FLOW,
63 	/* Video mode with the formatter itself as sync source */
64 	MCDE_VIDEO_FORMATTER_FLOW,
65 	/* DPI video with the formatter itsels as sync source */
66 	MCDE_DPI_FORMATTER_FLOW,
67 };
68 
69 struct mcde {
70 	struct drm_device drm;
71 	struct device *dev;
72 	struct drm_panel *panel;
73 	struct drm_bridge *bridge;
74 	struct drm_connector *connector;
75 	struct drm_simple_display_pipe pipe;
76 	struct mipi_dsi_device *mdsi;
77 	bool dpi_output;
78 	s16 stride;
79 	enum mcde_flow_mode flow_mode;
80 	unsigned int flow_active;
81 	spinlock_t flow_lock; /* Locks the channel flow control */
82 
83 	void __iomem *regs;
84 
85 	struct clk *mcde_clk;
86 	struct clk *lcd_clk;
87 	struct clk *hdmi_clk;
88 	/* Handles to the clock dividers for FIFO A and B */
89 	struct clk *fifoa_clk;
90 	struct clk *fifob_clk;
91 	/* Locks the MCDE FIFO control register A and B */
92 	spinlock_t fifo_crx1_lock;
93 
94 	struct regulator *epod;
95 	struct regulator *vana;
96 };
97 
98 #define to_mcde(dev) container_of(dev, struct mcde, drm)
99 
mcde_flow_is_video(struct mcde * mcde)100 static inline bool mcde_flow_is_video(struct mcde *mcde)
101 {
102 	return (mcde->flow_mode == MCDE_VIDEO_TE_FLOW ||
103 		mcde->flow_mode == MCDE_VIDEO_FORMATTER_FLOW);
104 }
105 
106 bool mcde_dsi_irq(struct mipi_dsi_device *mdsi);
107 void mcde_dsi_te_request(struct mipi_dsi_device *mdsi);
108 void mcde_dsi_enable(struct drm_bridge *bridge);
109 void mcde_dsi_disable(struct drm_bridge *bridge);
110 extern struct platform_driver mcde_dsi_driver;
111 
112 void mcde_display_irq(struct mcde *mcde);
113 void mcde_display_disable_irqs(struct mcde *mcde);
114 int mcde_display_init(struct drm_device *drm);
115 
116 int mcde_init_clock_divider(struct mcde *mcde);
117 
118 #endif /* _MCDE_DRM_H_ */
119