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1 /*
2  * Copyright © 2006 Eric Anholt
3  *
4  * Permission to use, copy, modify, distribute, and sell this software and its
5  * documentation for any purpose is hereby granted without fee, provided that
6  * the above copyright notice appear in all copies and that both that copyright
7  * notice and this permission notice appear in supporting documentation, and
8  * that the name of the copyright holders not be used in advertising or
9  * publicity pertaining to distribution of the software without specific,
10  * written prior permission.  The copyright holders make no representations
11  * about the suitability of this software for any purpose.  It is provided "as
12  * is" without express or implied warranty.
13  *
14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20  * OF THIS SOFTWARE.
21  */
22 
23 #ifndef _INTEL_DVO_H
24 #define _INTEL_DVO_H
25 
26 #include <linux/i2c.h>
27 #include <drm/drmP.h>
28 #include <drm/drm_crtc.h>
29 #include "intel_drv.h"
30 
31 struct intel_dvo_device {
32 	const char *name;
33 	int type;
34 	/* DVOA/B/C output register */
35 	u32 dvo_reg;
36 	/* GPIO register used for i2c bus to control this device */
37 	u32 gpio;
38 	int slave_addr;
39 
40 	const struct intel_dvo_dev_ops *dev_ops;
41 	void *dev_priv;
42 	struct i2c_adapter *i2c_bus;
43 };
44 
45 struct intel_dvo_dev_ops {
46 	/*
47 	 * Initialize the device at startup time.
48 	 * Returns NULL if the device does not exist.
49 	 */
50 	bool (*init)(struct intel_dvo_device *dvo,
51 		     struct i2c_adapter *i2cbus);
52 
53 	/*
54 	 * Called to allow the output a chance to create properties after the
55 	 * RandR objects have been created.
56 	 */
57 	void (*create_resources)(struct intel_dvo_device *dvo);
58 
59 	/*
60 	 * Turn on/off output.
61 	 *
62 	 * Because none of our dvo drivers support an intermediate power levels,
63 	 * we don't expose this in the interfac.
64 	 */
65 	void (*dpms)(struct intel_dvo_device *dvo, bool enable);
66 
67 	/*
68 	 * Callback for testing a video mode for a given output.
69 	 *
70 	 * This function should only check for cases where a mode can't
71 	 * be supported on the output specifically, and not represent
72 	 * generic CRTC limitations.
73 	 *
74 	 * \return MODE_OK if the mode is valid, or another MODE_* otherwise.
75 	 */
76 	int (*mode_valid)(struct intel_dvo_device *dvo,
77 			  struct drm_display_mode *mode);
78 
79 	/*
80 	 * Callback for preparing mode changes on an output
81 	 */
82 	void (*prepare)(struct intel_dvo_device *dvo);
83 
84 	/*
85 	 * Callback for committing mode changes on an output
86 	 */
87 	void (*commit)(struct intel_dvo_device *dvo);
88 
89 	/*
90 	 * Callback for setting up a video mode after fixups have been made.
91 	 *
92 	 * This is only called while the output is disabled.  The dpms callback
93 	 * must be all that's necessary for the output, to turn the output on
94 	 * after this function is called.
95 	 */
96 	void (*mode_set)(struct intel_dvo_device *dvo,
97 			 struct drm_display_mode *mode,
98 			 struct drm_display_mode *adjusted_mode);
99 
100 	/*
101 	 * Probe for a connected output, and return detect_status.
102 	 */
103 	enum drm_connector_status (*detect)(struct intel_dvo_device *dvo);
104 
105 	/*
106 	 * Probe the current hw status, returning true if the connected output
107 	 * is active.
108 	 */
109 	bool (*get_hw_state)(struct intel_dvo_device *dev);
110 
111 	/**
112 	 * Query the device for the modes it provides.
113 	 *
114 	 * This function may also update MonInfo, mm_width, and mm_height.
115 	 *
116 	 * \return singly-linked list of modes or NULL if no modes found.
117 	 */
118 	struct drm_display_mode *(*get_modes)(struct intel_dvo_device *dvo);
119 
120 	/**
121 	 * Clean up driver-specific bits of the output
122 	 */
123 	void (*destroy) (struct intel_dvo_device *dvo);
124 
125 	/**
126 	 * Debugging hook to dump device registers to log file
127 	 */
128 	void (*dump_regs)(struct intel_dvo_device *dvo);
129 };
130 
131 extern struct intel_dvo_dev_ops sil164_ops;
132 extern struct intel_dvo_dev_ops ch7xxx_ops;
133 extern struct intel_dvo_dev_ops ivch_ops;
134 extern struct intel_dvo_dev_ops tfp410_ops;
135 extern struct intel_dvo_dev_ops ch7017_ops;
136 extern struct intel_dvo_dev_ops ns2501_ops;
137 
138 #endif /* _INTEL_DVO_H */
139