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
  31 struct 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
  46 struct 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
 132 extern const struct intel_dvo_dev_ops sil164_ops;
 133 extern const struct intel_dvo_dev_ops ch7xxx_ops;
 134 extern const struct intel_dvo_dev_ops ivch_ops;
 135 extern const struct intel_dvo_dev_ops tfp410_ops;
 136 extern const struct intel_dvo_dev_ops ch7017_ops;
 137 extern const struct intel_dvo_dev_ops ns2501_ops;
 138
 139 #endif /* _INTEL_DVO_H */