LXR linux/drivers/gpu/drm/i915/intel

   1/*
   2 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
   3 * Copyright (c) 2007, 2010 Intel Corporation
   4 *   Jesse Barnes <jesse.barnes@intel.com>
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a
   7 * copy of this software and associated documentation files (the "Software"),
   8 * to deal in the Software without restriction, including without limitation
   9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10 * and/or sell copies of the Software, and to permit persons to whom the
  11 * Software is furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice (including the next
  14 * paragraph) shall be included in all copies or substantial portions of the
  15 * Software.
  16 *
  17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23 * DEALINGS IN THE SOFTWARE.
  24 */
  25
  26#include <linux/slab.h>
  27#include <linux/i2c.h>
  28#include <linux/fb.h>
  29#include "drmP.h"
  30#include "intel_drv.h"
  31#include "i915_drv.h"
  32
  33/**
  34 * intel_ddc_probe
  35 *
  36 */
  37bool intel_ddc_probe(struct intel_encoder *intel_encoder, int ddc_bus)
  38{
  39        struct drm_i915_private *dev_priv = intel_encoder->base.dev->dev_private;
  40        u8 out_buf[] = { 0x0, 0x0};
  41        u8 buf[2];
  42        struct i2c_msg msgs[] = {
  43                {
  44                        .addr = 0x50,
  45                        .flags = 0,
  46                        .len = 1,
  47                        .buf = out_buf,
  48                },
  49                {
  50                        .addr = 0x50,
  51                        .flags = I2C_M_RD,
  52                        .len = 1,
  53                        .buf = buf,
  54                }
  55        };
  56
  57        return i2c_transfer(&dev_priv->gmbus[ddc_bus].adapter, msgs, 2) == 2;
  58}
  59
  60/**
  61 * intel_ddc_get_modes - get modelist from monitor
  62 * @connector: DRM connector device to use
  63 * @adapter: i2c adapter
  64 *
  65 * Fetch the EDID information from @connector using the DDC bus.
  66 */
  67int intel_ddc_get_modes(struct drm_connector *connector,
  68                        struct i2c_adapter *adapter)
  69{
  70        struct edid *edid;
  71        int ret = 0;
  72
  73        edid = drm_get_edid(connector, adapter);
  74        if (edid) {
  75                drm_mode_connector_update_edid_property(connector, edid);
  76                ret = drm_add_edid_modes(connector, edid);
  77                connector->display_info.raw_edid = NULL;
  78                kfree(edid);
  79        }
  80
  81        return ret;
  82}
  83
  84static const char *force_audio_names[] = {
  85        "off",
  86        "auto",
  87        "on",
  88};
  89
  90void
  91intel_attach_force_audio_property(struct drm_connector *connector)
  92{
  93        struct drm_device *dev = connector->dev;
  94        struct drm_i915_private *dev_priv = dev->dev_private;
  95        struct drm_property *prop;
  96        int i;
  97
  98        prop = dev_priv->force_audio_property;
  99        if (prop == NULL) {
 100                prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
 101                                           "audio",
 102                                           ARRAY_SIZE(force_audio_names));
 103                if (prop == NULL)
 104                        return;
 105
 106                for (i = 0; i < ARRAY_SIZE(force_audio_names); i++)
 107                        drm_property_add_enum(prop, i, i-1, force_audio_names[i]);
 108
 109                dev_priv->force_audio_property = prop;
 110        }
 111        drm_connector_attach_property(connector, prop, 0);
 112}
 113
 114static const char *broadcast_rgb_names[] = {
 115        "Full",
 116        "Limited 16:235",
 117};
 118
 119void
 120intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 121{
 122        struct drm_device *dev = connector->dev;
 123        struct drm_i915_private *dev_priv = dev->dev_private;
 124        struct drm_property *prop;
 125        int i;
 126
 127        prop = dev_priv->broadcast_rgb_property;
 128        if (prop == NULL) {
 129                prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
 130                                           "Broadcast RGB",
 131                                           ARRAY_SIZE(broadcast_rgb_names));
 132                if (prop == NULL)
 133                        return;
 134
 135                for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
 136                        drm_property_add_enum(prop, i, i, broadcast_rgb_names[i]);
 137
 138                dev_priv->broadcast_rgb_property = prop;
 139        }
 140
 141        drm_connector_attach_property(connector, prop, 0);
 142}
 143