LXR linux/drivers/gpu/drm/i915/dvo.h

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