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         u32 dvo_reg;
  36         /* GPIO register used for i2c bus to control this device */
  37         u32 gpio;
  38         int slave_addr;
  39
  40         const struct intel_dvo_dev_ops *dev_ops;
  41         void *dev_priv;
  42         struct i2c_adapter *i2c_bus;
  43 };
  44
  45 struct intel_dvo_dev_ops {
  46         /*
  47          * Initialize the device at startup time.
  48          * Returns NULL if the device does not exist.
  49          */
  50         bool (*init)(struct intel_dvo_device *dvo,
  51                      struct i2c_adapter *i2cbus);
  52
  53         /*
  54          * Called to allow the output a chance to create properties after the
  55          * RandR objects have been created.
  56          */
  57         void (*create_resources)(struct intel_dvo_device *dvo);
  58
  59         /*
  60          * Turn on/off output or set intermediate power levels if available.
  61          *
  62          * Unsupported intermediate modes drop to the lower power setting.
  63          * If the  mode is DPMSModeOff, the output must be disabled,
  64          * as the DPLL may be disabled afterwards.
  65          */
  66         void (*dpms)(struct intel_dvo_device *dvo, int mode);
  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 to adjust the mode to be set in the CRTC.
  82          *
  83          * This allows an output to adjust the clock or even the entire set of
  84          * timings, which is used for panels with fixed timings or for
  85          * buses with clock limitations.
  86          */
  87         bool (*mode_fixup)(struct intel_dvo_device *dvo,
  88                            const struct drm_display_mode *mode,
  89                            struct drm_display_mode *adjusted_mode);
  90
  91         /*
  92          * Callback for preparing mode changes on an output
  93          */
  94         void (*prepare)(struct intel_dvo_device *dvo);
  95
  96         /*
  97          * Callback for committing mode changes on an output
  98          */
  99         void (*commit)(struct intel_dvo_device *dvo);
 100
 101         /*
 102          * Callback for setting up a video mode after fixups have been made.
 103          *
 104          * This is only called while the output is disabled.  The dpms callback
 105          * must be all that's necessary for the output, to turn the output on
 106          * after this function is called.
 107          */
 108         void (*mode_set)(struct intel_dvo_device *dvo,
 109                          struct drm_display_mode *mode,
 110                          struct drm_display_mode *adjusted_mode);
 111
 112         /*
 113          * Probe for a connected output, and return detect_status.
 114          */
 115         enum drm_connector_status (*detect)(struct intel_dvo_device *dvo);
 116
 117         /**
 118          * Query the device for the modes it provides.
 119          *
 120          * This function may also update MonInfo, mm_width, and mm_height.
 121          *
 122          * \return singly-linked list of modes or NULL if no modes found.
 123          */
 124         struct drm_display_mode *(*get_modes)(struct intel_dvo_device *dvo);
 125
 126         /**
 127          * Clean up driver-specific bits of the output
 128          */
 129         void (*destroy) (struct intel_dvo_device *dvo);
 130
 131         /**
 132          * Debugging hook to dump device registers to log file
 133          */
 134         void (*dump_regs)(struct intel_dvo_device *dvo);
 135 };
 136
 137 extern struct intel_dvo_dev_ops sil164_ops;
 138 extern struct intel_dvo_dev_ops ch7xxx_ops;
 139 extern struct intel_dvo_dev_ops ivch_ops;
 140 extern struct intel_dvo_dev_ops tfp410_ops;
 141 extern struct intel_dvo_dev_ops ch7017_ops;
 142
 143 #endif /* _INTEL_DVO_H */