drivers/gpu/drm/i915/display/intel_dvo_dev.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_DEV_H__
  24 #define __INTEL_DVO_DEV_H__
  25
  26 #include <linux/i2c.h>
  27
  28 #include <drm/drm_crtc.h>
  29
  30 #include "i915_reg.h"
  31
  32 struct intel_dvo_device {
  33         const char *name;
  34         int type;
  35         /* DVOA/B/C output register */
  36         i915_reg_t dvo_reg;
  37         i915_reg_t dvo_srcdim_reg;
  38         /* GPIO register used for i2c bus to control this device */
  39         u32 gpio;
  40         int slave_addr;
  41
  42         const struct intel_dvo_dev_ops *dev_ops;
  43         void *dev_priv;
  44         struct i2c_adapter *i2c_bus;
  45 };
  46
  47 struct intel_dvo_dev_ops {
  48         /*
  49          * Initialize the device at startup time.
  50          * Returns NULL if the device does not exist.
  51          */
  52         bool (*init)(struct intel_dvo_device *dvo,
  53                      struct i2c_adapter *i2cbus);
  54
  55         /*
  56          * Called to allow the output a chance to create properties after the
  57          * RandR objects have been created.
  58          */
  59         void (*create_resources)(struct intel_dvo_device *dvo);
  60
  61         /*
  62          * Turn on/off output.
  63          *
  64          * Because none of our dvo drivers support an intermediate power levels,
  65          * we don't expose this in the interfac.
  66          */
  67         void (*dpms)(struct intel_dvo_device *dvo, bool enable);
  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 for preparing mode changes on an output
  83          */
  84         void (*prepare)(struct intel_dvo_device *dvo);
  85
  86         /*
  87          * Callback for committing mode changes on an output
  88          */
  89         void (*commit)(struct intel_dvo_device *dvo);
  90
  91         /*
  92          * Callback for setting up a video mode after fixups have been made.
  93          *
  94          * This is only called while the output is disabled.  The dpms callback
  95          * must be all that's necessary for the output, to turn the output on
  96          * after this function is called.
  97          */
  98         void (*mode_set)(struct intel_dvo_device *dvo,
  99                          const struct drm_display_mode *mode,
 100                          const struct drm_display_mode *adjusted_mode);
 101
 102         /*
 103          * Probe for a connected output, and return detect_status.
 104          */
 105         enum drm_connector_status (*detect)(struct intel_dvo_device *dvo);
 106
 107         /*
 108          * Probe the current hw status, returning true if the connected output
 109          * is active.
 110          */
 111         bool (*get_hw_state)(struct intel_dvo_device *dev);
 112
 113         /**
 114          * Query the device for the modes it provides.
 115          *
 116          * This function may also update MonInfo, mm_width, and mm_height.
 117          *
 118          * \return singly-linked list of modes or NULL if no modes found.
 119          */
 120         struct drm_display_mode *(*get_modes)(struct intel_dvo_device *dvo);
 121
 122         /**
 123          * Clean up driver-specific bits of the output
 124          */
 125         void (*destroy) (struct intel_dvo_device *dvo);
 126
 127         /**
 128          * Debugging hook to dump device registers to log file
 129          */
 130         void (*dump_regs)(struct intel_dvo_device *dvo);
 131 };
 132
 133 extern const struct intel_dvo_dev_ops sil164_ops;
 134 extern const struct intel_dvo_dev_ops ch7xxx_ops;
 135 extern const struct intel_dvo_dev_ops ivch_ops;
 136 extern const struct intel_dvo_dev_ops tfp410_ops;
 137 extern const struct intel_dvo_dev_ops ch7017_ops;
 138 extern const struct intel_dvo_dev_ops ns2501_ops;
 139
 140 #endif /* __INTEL_DVO_DEV_H__ */