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
  32 struct 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
  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 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
 138 extern struct intel_dvo_dev_ops sil164_ops;
 139 extern struct intel_dvo_dev_ops ch7xxx_ops;
 140 extern struct intel_dvo_dev_ops ivch_ops;
 141 extern struct intel_dvo_dev_ops tfp410_ops;
 142 extern struct intel_dvo_dev_ops ch7017_ops;
 143
 144 #endif /* _INTEL_DVO_H */