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_DEV_H__
24 #define __INTEL_DVO_DEV_H__
25 
26 #include <linux/i2c.h>
27 
28 #include <drm/drm_crtc.h>
29 
30 #include "i915_reg.h"
31 
32 struct intel_dvo_device {
33 	const char *name;
34 	int type;
35 	/* DVOA/B/C output register */
36 	i915_reg_t dvo_reg;
37 	i915_reg_t dvo_srcdim_reg;
38 	/* GPIO register used for i2c bus to control this device */
39 	u32 gpio;
40 	int slave_addr;
41 
42 	const struct intel_dvo_dev_ops *dev_ops;
43 	void *dev_priv;
44 	struct i2c_adapter *i2c_bus;
45 };
46 
47 struct intel_dvo_dev_ops {
48 	/*
49 	 * Initialize the device at startup time.
50 	 * Returns NULL if the device does not exist.
51 	 */
52 	bool (*init)(struct intel_dvo_device *dvo,
53 		     struct i2c_adapter *i2cbus);
54 
55 	/*
56 	 * Called to allow the output a chance to create properties after the
57 	 * RandR objects have been created.
58 	 */
59 	void (*create_resources)(struct intel_dvo_device *dvo);
60 
61 	/*
62 	 * Turn on/off output.
63 	 *
64 	 * Because none of our dvo drivers support an intermediate power levels,
65 	 * we don't expose this in the interfac.
66 	 */
67 	void (*dpms)(struct intel_dvo_device *dvo, bool enable);
68 
69 	/*
70 	 * Callback for testing a video mode for a given output.
71 	 *
72 	 * This function should only check for cases where a mode can't
73 	 * be supported on the output specifically, and not represent
74 	 * generic CRTC limitations.
75 	 *
76 	 * \return MODE_OK if the mode is valid, or another MODE_* otherwise.
77 	 */
78 	int (*mode_valid)(struct intel_dvo_device *dvo,
79 			  struct drm_display_mode *mode);
80 
81 	/*
82 	 * Callback for preparing mode changes on an output
83 	 */
84 	void (*prepare)(struct intel_dvo_device *dvo);
85 
86 	/*
87 	 * Callback for committing mode changes on an output
88 	 */
89 	void (*commit)(struct intel_dvo_device *dvo);
90 
91 	/*
92 	 * Callback for setting up a video mode after fixups have been made.
93 	 *
94 	 * This is only called while the output is disabled.  The dpms callback
95 	 * must be all that's necessary for the output, to turn the output on
96 	 * after this function is called.
97 	 */
98 	void (*mode_set)(struct intel_dvo_device *dvo,
99 			 const struct drm_display_mode *mode,
100 			 const struct drm_display_mode *adjusted_mode);
101 
102 	/*
103 	 * Probe for a connected output, and return detect_status.
104 	 */
105 	enum drm_connector_status (*detect)(struct intel_dvo_device *dvo);
106 
107 	/*
108 	 * Probe the current hw status, returning true if the connected output
109 	 * is active.
110 	 */
111 	bool (*get_hw_state)(struct intel_dvo_device *dev);
112 
113 	/**
114 	 * Query the device for the modes it provides.
115 	 *
116 	 * This function may also update MonInfo, mm_width, and mm_height.
117 	 *
118 	 * \return singly-linked list of modes or NULL if no modes found.
119 	 */
120 	struct drm_display_mode *(*get_modes)(struct intel_dvo_device *dvo);
121 
122 	/**
123 	 * Clean up driver-specific bits of the output
124 	 */
125 	void (*destroy) (struct intel_dvo_device *dvo);
126 
127 	/**
128 	 * Debugging hook to dump device registers to log file
129 	 */
130 	void (*dump_regs)(struct intel_dvo_device *dvo);
131 };
132 
133 extern const struct intel_dvo_dev_ops sil164_ops;
134 extern const struct intel_dvo_dev_ops ch7xxx_ops;
135 extern const struct intel_dvo_dev_ops ivch_ops;
136 extern const struct intel_dvo_dev_ops tfp410_ops;
137 extern const struct intel_dvo_dev_ops ch7017_ops;
138 extern const struct intel_dvo_dev_ops ns2501_ops;
139 
140 #endif /* __INTEL_DVO_DEV_H__ */
141