linux/drivers/gpu/drm/amd/amdgpu/amdgpu_encoders.c
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   1/*
   2 * Copyright 2007-8 Advanced Micro Devices, Inc.
   3 * Copyright 2008 Red Hat Inc.
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining a
   6 * copy of this software and associated documentation files (the "Software"),
   7 * to deal in the Software without restriction, including without limitation
   8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 * and/or sell copies of the Software, and to permit persons to whom the
  10 * Software is furnished to do so, subject to the following conditions:
  11 *
  12 * The above copyright notice and this permission notice shall be included in
  13 * all copies or substantial portions of the Software.
  14 *
  15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21 * OTHER DEALINGS IN THE SOFTWARE.
  22 *
  23 * Authors: Dave Airlie
  24 *          Alex Deucher
  25 */
  26
  27#include <drm/drm_crtc_helper.h>
  28#include <drm/amdgpu_drm.h>
  29#include "amdgpu.h"
  30#include "amdgpu_connectors.h"
  31#include "amdgpu_display.h"
  32#include "atom.h"
  33#include "atombios_encoders.h"
  34
  35void
  36amdgpu_link_encoder_connector(struct drm_device *dev)
  37{
  38        struct amdgpu_device *adev = dev->dev_private;
  39        struct drm_connector *connector;
  40        struct drm_connector_list_iter iter;
  41        struct amdgpu_connector *amdgpu_connector;
  42        struct drm_encoder *encoder;
  43        struct amdgpu_encoder *amdgpu_encoder;
  44
  45        drm_connector_list_iter_begin(dev, &iter);
  46        /* walk the list and link encoders to connectors */
  47        drm_for_each_connector_iter(connector, &iter) {
  48                amdgpu_connector = to_amdgpu_connector(connector);
  49                list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
  50                        amdgpu_encoder = to_amdgpu_encoder(encoder);
  51                        if (amdgpu_encoder->devices & amdgpu_connector->devices) {
  52                                drm_connector_attach_encoder(connector, encoder);
  53                                if (amdgpu_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
  54                                        amdgpu_atombios_encoder_init_backlight(amdgpu_encoder, connector);
  55                                        adev->mode_info.bl_encoder = amdgpu_encoder;
  56                                }
  57                        }
  58                }
  59        }
  60        drm_connector_list_iter_end(&iter);
  61}
  62
  63void amdgpu_encoder_set_active_device(struct drm_encoder *encoder)
  64{
  65        struct drm_device *dev = encoder->dev;
  66        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
  67        struct drm_connector *connector;
  68        struct drm_connector_list_iter iter;
  69
  70        drm_connector_list_iter_begin(dev, &iter);
  71        drm_for_each_connector_iter(connector, &iter) {
  72                if (connector->encoder == encoder) {
  73                        struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
  74                        amdgpu_encoder->active_device = amdgpu_encoder->devices & amdgpu_connector->devices;
  75                        DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n",
  76                                  amdgpu_encoder->active_device, amdgpu_encoder->devices,
  77                                  amdgpu_connector->devices, encoder->encoder_type);
  78                }
  79        }
  80        drm_connector_list_iter_end(&iter);
  81}
  82
  83struct drm_connector *
  84amdgpu_get_connector_for_encoder(struct drm_encoder *encoder)
  85{
  86        struct drm_device *dev = encoder->dev;
  87        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
  88        struct drm_connector *connector, *found = NULL;
  89        struct drm_connector_list_iter iter;
  90        struct amdgpu_connector *amdgpu_connector;
  91
  92        drm_connector_list_iter_begin(dev, &iter);
  93        drm_for_each_connector_iter(connector, &iter) {
  94                amdgpu_connector = to_amdgpu_connector(connector);
  95                if (amdgpu_encoder->active_device & amdgpu_connector->devices) {
  96                        found = connector;
  97                        break;
  98                }
  99        }
 100        drm_connector_list_iter_end(&iter);
 101        return found;
 102}
 103
 104struct drm_connector *
 105amdgpu_get_connector_for_encoder_init(struct drm_encoder *encoder)
 106{
 107        struct drm_device *dev = encoder->dev;
 108        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
 109        struct drm_connector *connector, *found = NULL;
 110        struct drm_connector_list_iter iter;
 111        struct amdgpu_connector *amdgpu_connector;
 112
 113        drm_connector_list_iter_begin(dev, &iter);
 114        drm_for_each_connector_iter(connector, &iter) {
 115                amdgpu_connector = to_amdgpu_connector(connector);
 116                if (amdgpu_encoder->devices & amdgpu_connector->devices) {
 117                        found = connector;
 118                        break;
 119                }
 120        }
 121        drm_connector_list_iter_end(&iter);
 122        return found;
 123}
 124
 125struct drm_encoder *amdgpu_get_external_encoder(struct drm_encoder *encoder)
 126{
 127        struct drm_device *dev = encoder->dev;
 128        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
 129        struct drm_encoder *other_encoder;
 130        struct amdgpu_encoder *other_amdgpu_encoder;
 131
 132        if (amdgpu_encoder->is_ext_encoder)
 133                return NULL;
 134
 135        list_for_each_entry(other_encoder, &dev->mode_config.encoder_list, head) {
 136                if (other_encoder == encoder)
 137                        continue;
 138                other_amdgpu_encoder = to_amdgpu_encoder(other_encoder);
 139                if (other_amdgpu_encoder->is_ext_encoder &&
 140                    (amdgpu_encoder->devices & other_amdgpu_encoder->devices))
 141                        return other_encoder;
 142        }
 143        return NULL;
 144}
 145
 146u16 amdgpu_encoder_get_dp_bridge_encoder_id(struct drm_encoder *encoder)
 147{
 148        struct drm_encoder *other_encoder = amdgpu_get_external_encoder(encoder);
 149
 150        if (other_encoder) {
 151                struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(other_encoder);
 152
 153                switch (amdgpu_encoder->encoder_id) {
 154                case ENCODER_OBJECT_ID_TRAVIS:
 155                case ENCODER_OBJECT_ID_NUTMEG:
 156                        return amdgpu_encoder->encoder_id;
 157                default:
 158                        return ENCODER_OBJECT_ID_NONE;
 159                }
 160        }
 161        return ENCODER_OBJECT_ID_NONE;
 162}
 163
 164void amdgpu_panel_mode_fixup(struct drm_encoder *encoder,
 165                             struct drm_display_mode *adjusted_mode)
 166{
 167        struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
 168        struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode;
 169        unsigned hblank = native_mode->htotal - native_mode->hdisplay;
 170        unsigned vblank = native_mode->vtotal - native_mode->vdisplay;
 171        unsigned hover = native_mode->hsync_start - native_mode->hdisplay;
 172        unsigned vover = native_mode->vsync_start - native_mode->vdisplay;
 173        unsigned hsync_width = native_mode->hsync_end - native_mode->hsync_start;
 174        unsigned vsync_width = native_mode->vsync_end - native_mode->vsync_start;
 175
 176        adjusted_mode->clock = native_mode->clock;
 177        adjusted_mode->flags = native_mode->flags;
 178
 179        adjusted_mode->hdisplay = native_mode->hdisplay;
 180        adjusted_mode->vdisplay = native_mode->vdisplay;
 181
 182        adjusted_mode->htotal = native_mode->hdisplay + hblank;
 183        adjusted_mode->hsync_start = native_mode->hdisplay + hover;
 184        adjusted_mode->hsync_end = adjusted_mode->hsync_start + hsync_width;
 185
 186        adjusted_mode->vtotal = native_mode->vdisplay + vblank;
 187        adjusted_mode->vsync_start = native_mode->vdisplay + vover;
 188        adjusted_mode->vsync_end = adjusted_mode->vsync_start + vsync_width;
 189
 190        drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
 191
 192        adjusted_mode->crtc_hdisplay = native_mode->hdisplay;
 193        adjusted_mode->crtc_vdisplay = native_mode->vdisplay;
 194
 195        adjusted_mode->crtc_htotal = adjusted_mode->crtc_hdisplay + hblank;
 196        adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hdisplay + hover;
 197        adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + hsync_width;
 198
 199        adjusted_mode->crtc_vtotal = adjusted_mode->crtc_vdisplay + vblank;
 200        adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vdisplay + vover;
 201        adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + vsync_width;
 202
 203}
 204
 205bool amdgpu_dig_monitor_is_duallink(struct drm_encoder *encoder,
 206                                    u32 pixel_clock)
 207{
 208        struct drm_connector *connector;
 209        struct amdgpu_connector *amdgpu_connector;
 210        struct amdgpu_connector_atom_dig *dig_connector;
 211
 212        connector = amdgpu_get_connector_for_encoder(encoder);
 213        /* if we don't have an active device yet, just use one of
 214         * the connectors tied to the encoder.
 215         */
 216        if (!connector)
 217                connector = amdgpu_get_connector_for_encoder_init(encoder);
 218        amdgpu_connector = to_amdgpu_connector(connector);
 219
 220        switch (connector->connector_type) {
 221        case DRM_MODE_CONNECTOR_DVII:
 222        case DRM_MODE_CONNECTOR_HDMIB:
 223                if (amdgpu_connector->use_digital) {
 224                        /* HDMI 1.3 supports up to 340 Mhz over single link */
 225                        if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
 226                                if (pixel_clock > 340000)
 227                                        return true;
 228                                else
 229                                        return false;
 230                        } else {
 231                                if (pixel_clock > 165000)
 232                                        return true;
 233                                else
 234                                        return false;
 235                        }
 236                } else
 237                        return false;
 238        case DRM_MODE_CONNECTOR_DVID:
 239        case DRM_MODE_CONNECTOR_HDMIA:
 240        case DRM_MODE_CONNECTOR_DisplayPort:
 241                dig_connector = amdgpu_connector->con_priv;
 242                if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
 243                    (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
 244                        return false;
 245                else {
 246                        /* HDMI 1.3 supports up to 340 Mhz over single link */
 247                        if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
 248                                if (pixel_clock > 340000)
 249                                        return true;
 250                                else
 251                                        return false;
 252                        } else {
 253                                if (pixel_clock > 165000)
 254                                        return true;
 255                                else
 256                                        return false;
 257                        }
 258                }
 259        default:
 260                return false;
 261        }
 262}
 263