drivers/gpu/drm/nouveau/nv50_dac.c

   1 /*
   2  * Copyright (C) 2008 Maarten Maathuis.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm_crtc_helper.h"
  29
  30 #define NOUVEAU_DMA_DEBUG (nouveau_reg_debug & NOUVEAU_REG_DEBUG_EVO)
  31 #include "nouveau_reg.h"
  32 #include "nouveau_drv.h"
  33 #include "nouveau_dma.h"
  34 #include "nouveau_encoder.h"
  35 #include "nouveau_connector.h"
  36 #include "nouveau_crtc.h"
  37 #include "nv50_display.h"
  38
  39 static void
  40 nv50_dac_disconnect(struct nouveau_encoder *nv_encoder)
  41 {
  42         struct drm_device *dev = to_drm_encoder(nv_encoder)->dev;
  43         struct drm_nouveau_private *dev_priv = dev->dev_private;
  44         struct nouveau_channel *evo = dev_priv->evo;
  45         int ret;
  46
  47         NV_DEBUG(dev, "Disconnecting DAC %d\n", nv_encoder->or);
  48
  49         ret = RING_SPACE(evo, 2);
  50         if (ret) {
  51                 NV_ERROR(dev, "no space while disconnecting DAC\n");
  52                 return;
  53         }
  54         BEGIN_RING(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 1);
  55         OUT_RING(evo, 0);
  56 }
  57
  58 static enum drm_connector_status
  59 nv50_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
  60 {
  61         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
  62         struct drm_device *dev = encoder->dev;
  63         struct drm_nouveau_private *dev_priv = dev->dev_private;
  64         enum drm_connector_status status = connector_status_disconnected;
  65         uint32_t dpms_state, load_pattern, load_state;
  66         int or = nv_encoder->or;
  67
  68         nv_wr32(dev, NV50_PDISPLAY_DAC_CLK_CTRL1(or), 0x00000001);
  69         dpms_state = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or));
  70
  71         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
  72                 0x00150000 | NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
  73         if (!nv_wait(NV50_PDISPLAY_DAC_DPMS_CTRL(or),
  74                      NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
  75                 NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
  76                 NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
  77                           nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
  78                 return status;
  79         }
  80
  81         /* Use bios provided value if possible. */
  82         if (dev_priv->vbios->dactestval) {
  83                 load_pattern = dev_priv->vbios->dactestval;
  84                 NV_DEBUG(dev, "Using bios provided load_pattern of %d\n",
  85                           load_pattern);
  86         } else {
  87                 load_pattern = 340;
  88                 NV_DEBUG(dev, "Using default load_pattern of %d\n",
  89                          load_pattern);
  90         }
  91
  92         nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or),
  93                 NV50_PDISPLAY_DAC_LOAD_CTRL_ACTIVE | load_pattern);
  94         mdelay(45); /* give it some time to process */
  95         load_state = nv_rd32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or));
  96
  97         nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or), 0);
  98         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), dpms_state |
  99                 NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
 100
 101         if ((load_state & NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT) ==
 102                           NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT)
 103                 status = connector_status_connected;
 104
 105         if (status == connector_status_connected)
 106                 NV_DEBUG(dev, "Load was detected on output with or %d\n", or);
 107         else
 108                 NV_DEBUG(dev, "Load was not detected on output with or %d\n", or);
 109
 110         return status;
 111 }
 112
 113 static void
 114 nv50_dac_dpms(struct drm_encoder *encoder, int mode)
 115 {
 116         struct drm_device *dev = encoder->dev;
 117         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 118         uint32_t val;
 119         int or = nv_encoder->or;
 120
 121         NV_DEBUG(dev, "or %d mode %d\n", or, mode);
 122
 123         /* wait for it to be done */
 124         if (!nv_wait(NV50_PDISPLAY_DAC_DPMS_CTRL(or),
 125                      NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
 126                 NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
 127                 NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
 128                          nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
 129                 return;
 130         }
 131
 132         val = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)) & ~0x7F;
 133
 134         if (mode != DRM_MODE_DPMS_ON)
 135                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_BLANKED;
 136
 137         switch (mode) {
 138         case DRM_MODE_DPMS_STANDBY:
 139                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
 140                 break;
 141         case DRM_MODE_DPMS_SUSPEND:
 142                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
 143                 break;
 144         case DRM_MODE_DPMS_OFF:
 145                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_OFF;
 146                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
 147                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
 148                 break;
 149         default:
 150                 break;
 151         }
 152
 153         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), val |
 154                 NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
 155 }
 156
 157 static void
 158 nv50_dac_save(struct drm_encoder *encoder)
 159 {
 160         NV_ERROR(encoder->dev, "!!\n");
 161 }
 162
 163 static void
 164 nv50_dac_restore(struct drm_encoder *encoder)
 165 {
 166         NV_ERROR(encoder->dev, "!!\n");
 167 }
 168
 169 static bool
 170 nv50_dac_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
 171                     struct drm_display_mode *adjusted_mode)
 172 {
 173         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 174         struct nouveau_connector *connector;
 175
 176         NV_DEBUG(encoder->dev, "or %d\n", nv_encoder->or);
 177
 178         connector = nouveau_encoder_connector_get(nv_encoder);
 179         if (!connector) {
 180                 NV_ERROR(encoder->dev, "Encoder has no connector\n");
 181                 return false;
 182         }
 183
 184         if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
 185              connector->native_mode) {
 186                 int id = adjusted_mode->base.id;
 187                 *adjusted_mode = *connector->native_mode;
 188                 adjusted_mode->base.id = id;
 189         }
 190
 191         return true;
 192 }
 193
 194 static void
 195 nv50_dac_prepare(struct drm_encoder *encoder)
 196 {
 197 }
 198
 199 static void
 200 nv50_dac_commit(struct drm_encoder *encoder)
 201 {
 202 }
 203
 204 static void
 205 nv50_dac_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 206                   struct drm_display_mode *adjusted_mode)
 207 {
 208         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 209         struct drm_device *dev = encoder->dev;
 210         struct drm_nouveau_private *dev_priv = dev->dev_private;
 211         struct nouveau_channel *evo = dev_priv->evo;
 212         struct nouveau_crtc *crtc = nouveau_crtc(encoder->crtc);
 213         uint32_t mode_ctl = 0, mode_ctl2 = 0;
 214         int ret;
 215
 216         NV_DEBUG(dev, "or %d\n", nv_encoder->or);
 217
 218         nv50_dac_dpms(encoder, DRM_MODE_DPMS_ON);
 219
 220         if (crtc->index == 1)
 221                 mode_ctl |= NV50_EVO_DAC_MODE_CTRL_CRTC1;
 222         else
 223                 mode_ctl |= NV50_EVO_DAC_MODE_CTRL_CRTC0;
 224
 225         /* Lacking a working tv-out, this is not a 100% sure. */
 226         if (nv_encoder->dcb->type == OUTPUT_ANALOG)
 227                 mode_ctl |= 0x40;
 228         else
 229         if (nv_encoder->dcb->type == OUTPUT_TV)
 230                 mode_ctl |= 0x100;
 231
 232         if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
 233                 mode_ctl2 |= NV50_EVO_DAC_MODE_CTRL2_NHSYNC;
 234
 235         if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
 236                 mode_ctl2 |= NV50_EVO_DAC_MODE_CTRL2_NVSYNC;
 237
 238         ret = RING_SPACE(evo, 3);
 239         if (ret) {
 240                 NV_ERROR(dev, "no space while connecting DAC\n");
 241                 return;
 242         }
 243         BEGIN_RING(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 2);
 244         OUT_RING(evo, mode_ctl);
 245         OUT_RING(evo, mode_ctl2);
 246 }
 247
 248 static const struct drm_encoder_helper_funcs nv50_dac_helper_funcs = {
 249         .dpms = nv50_dac_dpms,
 250         .save = nv50_dac_save,
 251         .restore = nv50_dac_restore,
 252         .mode_fixup = nv50_dac_mode_fixup,
 253         .prepare = nv50_dac_prepare,
 254         .commit = nv50_dac_commit,
 255         .mode_set = nv50_dac_mode_set,
 256         .detect = nv50_dac_detect
 257 };
 258
 259 static void
 260 nv50_dac_destroy(struct drm_encoder *encoder)
 261 {
 262         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 263
 264         if (!encoder)
 265                 return;
 266
 267         NV_DEBUG(encoder->dev, "\n");
 268
 269         drm_encoder_cleanup(encoder);
 270         kfree(nv_encoder);
 271 }
 272
 273 static const struct drm_encoder_funcs nv50_dac_encoder_funcs = {
 274         .destroy = nv50_dac_destroy,
 275 };
 276
 277 int
 278 nv50_dac_create(struct drm_device *dev, struct dcb_entry *entry)
 279 {
 280         struct nouveau_encoder *nv_encoder;
 281         struct drm_encoder *encoder;
 282
 283         NV_DEBUG(dev, "\n");
 284         NV_INFO(dev, "Detected a DAC output\n");
 285
 286         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
 287         if (!nv_encoder)
 288                 return -ENOMEM;
 289         encoder = to_drm_encoder(nv_encoder);
 290
 291         nv_encoder->dcb = entry;
 292         nv_encoder->or = ffs(entry->or) - 1;
 293
 294         nv_encoder->disconnect = nv50_dac_disconnect;
 295
 296         drm_encoder_init(dev, encoder, &nv50_dac_encoder_funcs,
 297                          DRM_MODE_ENCODER_DAC);
 298         drm_encoder_helper_add(encoder, &nv50_dac_helper_funcs);
 299
 300         encoder->possible_crtcs = entry->heads;
 301         encoder->possible_clones = 0;
 302         return 0;
 303 }
 304