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.
  61          *
  62          * Because none of our dvo drivers support an intermediate power levels,
  63          * we don't expose this in the interfac.
  64          */
  65         void (*dpms)(struct intel_dvo_device *dvo, bool enable);
  66
  67         /*
  68          * Callback for testing a video mode for a given output.
  69          *
  70          * This function should only check for cases where a mode can't
  71          * be supported on the output specifically, and not represent
  72          * generic CRTC limitations.
  73          *
  74          * \return MODE_OK if the mode is valid, or another MODE_* otherwise.
  75          */
  76         int (*mode_valid)(struct intel_dvo_device *dvo,
  77                           struct drm_display_mode *mode);
  78
  79         /*
  80          * Callback to adjust the mode to be set in the CRTC.
  81          *
  82          * This allows an output to adjust the clock or even the entire set of
  83          * timings, which is used for panels with fixed timings or for
  84          * buses with clock limitations.
  85          */
  86         bool (*mode_fixup)(struct intel_dvo_device *dvo,
  87                            const struct drm_display_mode *mode,
  88                            struct drm_display_mode *adjusted_mode);
  89
  90         /*
  91          * Callback for preparing mode changes on an output
  92          */
  93         void (*prepare)(struct intel_dvo_device *dvo);
  94
  95         /*
  96          * Callback for committing mode changes on an output
  97          */
  98         void (*commit)(struct intel_dvo_device *dvo);
  99
 100         /*
 101          * Callback for setting up a video mode after fixups have been made.
 102          *
 103          * This is only called while the output is disabled.  The dpms callback
 104          * must be all that's necessary for the output, to turn the output on
 105          * after this function is called.
 106          */
 107         void (*mode_set)(struct intel_dvo_device *dvo,
 108                          struct drm_display_mode *mode,
 109                          struct drm_display_mode *adjusted_mode);
 110
 111         /*
 112          * Probe for a connected output, and return detect_status.
 113          */
 114         enum drm_connector_status (*detect)(struct intel_dvo_device *dvo);
 115
 116         /*
 117          * Probe the current hw status, returning true if the connected output
 118          * is active.
 119          */
 120         bool (*get_hw_state)(struct intel_dvo_device *dev);
 121
 122         /**
 123          * Query the device for the modes it provides.
 124          *
 125          * This function may also update MonInfo, mm_width, and mm_height.
 126          *
 127          * \return singly-linked list of modes or NULL if no modes found.
 128          */
 129         struct drm_display_mode *(*get_modes)(struct intel_dvo_device *dvo);
 130
 131         /**
 132          * Clean up driver-specific bits of the output
 133          */
 134         void (*destroy) (struct intel_dvo_device *dvo);
 135
 136         /**
 137          * Debugging hook to dump device registers to log file
 138          */
 139         void (*dump_regs)(struct intel_dvo_device *dvo);
 140 };
 141
 142 extern struct intel_dvo_dev_ops sil164_ops;
 143 extern struct intel_dvo_dev_ops ch7xxx_ops;
 144 extern struct intel_dvo_dev_ops ivch_ops;
 145 extern struct intel_dvo_dev_ops tfp410_ops;
 146 extern struct intel_dvo_dev_ops ch7017_ops;
 147 extern struct intel_dvo_dev_ops ns2501_ops;
 148
 149 #endif /* _INTEL_DVO_H */