1 /*
2  * Copyright © 2013 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21  * DEALINGS IN THE SOFTWARE.
22  */
23 
24 #ifndef _INTEL_DSI_H
25 #define _INTEL_DSI_H
26 
27 #include <drm/drm_crtc.h>
28 #include <drm/drm_mipi_dsi.h>
29 
30 #include "intel_display_types.h"
31 
32 #define INTEL_DSI_VIDEO_MODE	0
33 #define INTEL_DSI_COMMAND_MODE	1
34 
35 /* Dual Link support */
36 #define DSI_DUAL_LINK_NONE		0
37 #define DSI_DUAL_LINK_FRONT_BACK	1
38 #define DSI_DUAL_LINK_PIXEL_ALT		2
39 
40 struct intel_dsi_host;
41 
42 struct intel_dsi {
43 	struct intel_encoder base;
44 
45 	struct intel_dsi_host *dsi_hosts[I915_MAX_PORTS];
46 	intel_wakeref_t io_wakeref[I915_MAX_PORTS];
47 
48 	/* GPIO Desc for panel and backlight control */
49 	struct gpio_desc *gpio_panel;
50 	struct gpio_desc *gpio_backlight;
51 
52 	struct intel_connector *attached_connector;
53 
54 	/* bit mask of ports (vlv dsi) or phys (icl dsi) being driven */
55 	union {
56 		u16 ports;	/* VLV DSI */
57 		u16 phys;	/* ICL DSI */
58 	};
59 
60 	/* if true, use HS mode, otherwise LP */
61 	bool hs;
62 
63 	/* virtual channel */
64 	int channel;
65 
66 	/* Video mode or command mode */
67 	u16 operation_mode;
68 
69 	/* number of DSI lanes */
70 	unsigned int lane_count;
71 
72 	/* i2c bus associated with the slave device */
73 	int i2c_bus_num;
74 
75 	/*
76 	 * video mode pixel format
77 	 *
78 	 * XXX: consolidate on .format in struct mipi_dsi_device.
79 	 */
80 	enum mipi_dsi_pixel_format pixel_format;
81 
82 	/* NON_BURST_SYNC_PULSE, NON_BURST_SYNC_EVENTS, or BURST_MODE */
83 	int video_mode;
84 
85 	/* eot for MIPI_EOT_DISABLE register */
86 	u8 eotp_pkt;
87 	u8 clock_stop;
88 
89 	u8 escape_clk_div;
90 	u8 dual_link;
91 
92 	/* RGB or BGR */
93 	bool bgr_enabled;
94 
95 	u8 pixel_overlap;
96 	u32 port_bits;
97 	u32 bw_timer;
98 	u32 dphy_reg;
99 
100 	/* data lanes dphy timing */
101 	u32 dphy_data_lane_reg;
102 	u32 video_frmt_cfg_bits;
103 	u16 lp_byte_clk;
104 
105 	/* timeouts in byte clocks */
106 	u16 hs_tx_timeout;
107 	u16 lp_rx_timeout;
108 	u16 turn_arnd_val;
109 	u16 rst_timer_val;
110 	u16 hs_to_lp_count;
111 	u16 clk_lp_to_hs_count;
112 	u16 clk_hs_to_lp_count;
113 
114 	u16 init_count;
115 	u32 pclk;
116 	u16 burst_mode_ratio;
117 
118 	/* all delays in ms */
119 	u16 backlight_off_delay;
120 	u16 backlight_on_delay;
121 	u16 panel_on_delay;
122 	u16 panel_off_delay;
123 	u16 panel_pwr_cycle_delay;
124 	ktime_t panel_power_off_time;
125 };
126 
127 struct intel_dsi_host {
128 	struct mipi_dsi_host base;
129 	struct intel_dsi *intel_dsi;
130 	enum port port;
131 
132 	/* our little hack */
133 	struct mipi_dsi_device *device;
134 };
135 
136 static inline struct intel_dsi_host *to_intel_dsi_host(struct mipi_dsi_host *h)
137 {
138 	return container_of(h, struct intel_dsi_host, base);
139 }
140 
141 #define for_each_dsi_port(__port, __ports_mask) \
142 	for_each_port_masked(__port, __ports_mask)
143 #define for_each_dsi_phy(__phy, __phys_mask) \
144 	for_each_phy_masked(__phy, __phys_mask)
145 
146 static inline struct intel_dsi *enc_to_intel_dsi(struct intel_encoder *encoder)
147 {
148 	return container_of(&encoder->base, struct intel_dsi, base.base);
149 }
150 
151 static inline bool is_vid_mode(struct intel_dsi *intel_dsi)
152 {
153 	return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE;
154 }
155 
156 static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
157 {
158 	return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE;
159 }
160 
161 static inline u16 intel_dsi_encoder_ports(struct intel_encoder *encoder)
162 {
163 	return enc_to_intel_dsi(encoder)->ports;
164 }
165 
166 int intel_dsi_bitrate(const struct intel_dsi *intel_dsi);
167 int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi);
168 enum drm_panel_orientation
169 intel_dsi_get_panel_orientation(struct intel_connector *connector);
170 int intel_dsi_get_modes(struct drm_connector *connector);
171 enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
172 					  struct drm_display_mode *mode);
173 struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
174 					   const struct mipi_dsi_host_ops *funcs,
175 					   enum port port);
176 void intel_dsi_wait_panel_power_cycle(struct intel_dsi *intel_dsi);
177 void intel_dsi_shutdown(struct intel_encoder *encoder);
178 
179 #endif /* _INTEL_DSI_H */
180