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
 32struct 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
 47struct 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
133extern const struct intel_dvo_dev_ops sil164_ops;
134extern const struct intel_dvo_dev_ops ch7xxx_ops;
135extern const struct intel_dvo_dev_ops ivch_ops;
136extern const struct intel_dvo_dev_ops tfp410_ops;
137extern const struct intel_dvo_dev_ops ch7017_ops;
138extern const struct intel_dvo_dev_ops ns2501_ops;
139
140#endif /* __INTEL_DVO_DEV_H__ */