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 "drmP.h"
  28#include "drm.h"
  29#include "drm_crtc.h"
  30#include "intel_drv.h"
  31
  32struct intel_dvo_device {
  33        const char *name;
  34        int type;
  35        /* DVOA/B/C output register */
  36        u32 dvo_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 or set intermediate power levels if available.
  62         *
  63         * Unsupported intermediate modes drop to the lower power setting.
  64         * If the  mode is DPMSModeOff, the output must be disabled,
  65         * as the DPLL may be disabled afterwards.
  66         */
  67        void (*dpms)(struct intel_dvo_device *dvo, int mode);
  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 to adjust the mode to be set in the CRTC.
  83         *
  84         * This allows an output to adjust the clock or even the entire set of
  85         * timings, which is used for panels with fixed timings or for
  86         * buses with clock limitations.
  87         */
  88        bool (*mode_fixup)(struct intel_dvo_device *dvo,
  89                           struct drm_display_mode *mode,
  90                           struct drm_display_mode *adjusted_mode);
  91
  92        /*
  93         * Callback for preparing mode changes on an output
  94         */
  95        void (*prepare)(struct intel_dvo_device *dvo);
  96
  97        /*
  98         * Callback for committing mode changes on an output
  99         */
 100        void (*commit)(struct intel_dvo_device *dvo);
 101
 102        /*
 103         * Callback for setting up a video mode after fixups have been made.
 104         *
 105         * This is only called while the output is disabled.  The dpms callback
 106         * must be all that's necessary for the output, to turn the output on
 107         * after this function is called.
 108         */
 109        void (*mode_set)(struct intel_dvo_device *dvo,
 110                         struct drm_display_mode *mode,
 111                         struct drm_display_mode *adjusted_mode);
 112
 113        /*
 114         * Probe for a connected output, and return detect_status.
 115         */
 116        enum drm_connector_status (*detect)(struct intel_dvo_device *dvo);
 117
 118        /**
 119         * Query the device for the modes it provides.
 120         *
 121         * This function may also update MonInfo, mm_width, and mm_height.
 122         *
 123         * \return singly-linked list of modes or NULL if no modes found.
 124         */
 125        struct drm_display_mode *(*get_modes)(struct intel_dvo_device *dvo);
 126
 127        /**
 128         * Clean up driver-specific bits of the output
 129         */
 130        void (*destroy) (struct intel_dvo_device *dvo);
 131
 132        /**
 133         * Debugging hook to dump device registers to log file
 134         */
 135        void (*dump_regs)(struct intel_dvo_device *dvo);
 136};
 137
 138extern struct intel_dvo_dev_ops sil164_ops;
 139extern struct intel_dvo_dev_ops ch7xxx_ops;
 140extern struct intel_dvo_dev_ops ivch_ops;
 141extern struct intel_dvo_dev_ops tfp410_ops;
 142extern struct intel_dvo_dev_ops ch7017_ops;
 143
 144#endif /* _INTEL_DVO_H */
 145