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 <drm/drmP.h>
  28 #include <drm/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 drm_encoder *encoder)
  41 {
  42         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
  43         struct drm_device *dev = encoder->dev;
  44         struct nouveau_channel *evo = nv50_display(dev)->master;
  45         int ret;
  46
  47         if (!nv_encoder->crtc)
  48                 return;
  49         nv50_crtc_blank(nouveau_crtc(nv_encoder->crtc), true);
  50
  51         NV_DEBUG_KMS(dev, "Disconnecting DAC %d\n", nv_encoder->or);
  52
  53         ret = RING_SPACE(evo, 4);
  54         if (ret) {
  55                 NV_ERROR(dev, "no space while disconnecting DAC\n");
  56                 return;
  57         }
  58         BEGIN_NV04(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 1);
  59         OUT_RING  (evo, 0);
  60         BEGIN_NV04(evo, 0, NV50_EVO_UPDATE, 1);
  61         OUT_RING  (evo, 0);
  62
  63         nv_encoder->crtc = NULL;
  64 }
  65
  66 static enum drm_connector_status
  67 nv50_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
  68 {
  69         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
  70         struct drm_device *dev = encoder->dev;
  71         struct drm_nouveau_private *dev_priv = dev->dev_private;
  72         enum drm_connector_status status = connector_status_disconnected;
  73         uint32_t dpms_state, load_pattern, load_state;
  74         int or = nv_encoder->or;
  75
  76         nv_wr32(dev, NV50_PDISPLAY_DAC_CLK_CTRL1(or), 0x00000001);
  77         dpms_state = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or));
  78
  79         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
  80                 0x00150000 | NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
  81         if (!nv_wait(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
  82                      NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
  83                 NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
  84                 NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
  85                           nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
  86                 return status;
  87         }
  88
  89         /* Use bios provided value if possible. */
  90         if (dev_priv->vbios.dactestval) {
  91                 load_pattern = dev_priv->vbios.dactestval;
  92                 NV_DEBUG_KMS(dev, "Using bios provided load_pattern of %d\n",
  93                           load_pattern);
  94         } else {
  95                 load_pattern = 340;
  96                 NV_DEBUG_KMS(dev, "Using default load_pattern of %d\n",
  97                          load_pattern);
  98         }
  99
 100         nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or),
 101                 NV50_PDISPLAY_DAC_LOAD_CTRL_ACTIVE | load_pattern);
 102         mdelay(45); /* give it some time to process */
 103         load_state = nv_rd32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or));
 104
 105         nv_wr32(dev, NV50_PDISPLAY_DAC_LOAD_CTRL(or), 0);
 106         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), dpms_state |
 107                 NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
 108
 109         if ((load_state & NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT) ==
 110                           NV50_PDISPLAY_DAC_LOAD_CTRL_PRESENT)
 111                 status = connector_status_connected;
 112
 113         if (status == connector_status_connected)
 114                 NV_DEBUG_KMS(dev, "Load was detected on output with or %d\n", or);
 115         else
 116                 NV_DEBUG_KMS(dev, "Load was not detected on output with or %d\n", or);
 117
 118         return status;
 119 }
 120
 121 static void
 122 nv50_dac_dpms(struct drm_encoder *encoder, int mode)
 123 {
 124         struct drm_device *dev = encoder->dev;
 125         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 126         uint32_t val;
 127         int or = nv_encoder->or;
 128
 129         NV_DEBUG_KMS(dev, "or %d mode %d\n", or, mode);
 130
 131         /* wait for it to be done */
 132         if (!nv_wait(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or),
 133                      NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING, 0)) {
 134                 NV_ERROR(dev, "timeout: DAC_DPMS_CTRL_PENDING(%d) == 0\n", or);
 135                 NV_ERROR(dev, "DAC_DPMS_CTRL(%d) = 0x%08x\n", or,
 136                          nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)));
 137                 return;
 138         }
 139
 140         val = nv_rd32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or)) & ~0x7F;
 141
 142         if (mode != DRM_MODE_DPMS_ON)
 143                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_BLANKED;
 144
 145         switch (mode) {
 146         case DRM_MODE_DPMS_STANDBY:
 147                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
 148                 break;
 149         case DRM_MODE_DPMS_SUSPEND:
 150                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
 151                 break;
 152         case DRM_MODE_DPMS_OFF:
 153                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_OFF;
 154                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_HSYNC_OFF;
 155                 val |= NV50_PDISPLAY_DAC_DPMS_CTRL_VSYNC_OFF;
 156                 break;
 157         default:
 158                 break;
 159         }
 160
 161         nv_wr32(dev, NV50_PDISPLAY_DAC_DPMS_CTRL(or), val |
 162                 NV50_PDISPLAY_DAC_DPMS_CTRL_PENDING);
 163 }
 164
 165 static void
 166 nv50_dac_save(struct drm_encoder *encoder)
 167 {
 168         NV_ERROR(encoder->dev, "!!\n");
 169 }
 170
 171 static void
 172 nv50_dac_restore(struct drm_encoder *encoder)
 173 {
 174         NV_ERROR(encoder->dev, "!!\n");
 175 }
 176
 177 static bool
 178 nv50_dac_mode_fixup(struct drm_encoder *encoder,
 179                     const struct drm_display_mode *mode,
 180                     struct drm_display_mode *adjusted_mode)
 181 {
 182         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 183         struct nouveau_connector *connector;
 184
 185         NV_DEBUG_KMS(encoder->dev, "or %d\n", nv_encoder->or);
 186
 187         connector = nouveau_encoder_connector_get(nv_encoder);
 188         if (!connector) {
 189                 NV_ERROR(encoder->dev, "Encoder has no connector\n");
 190                 return false;
 191         }
 192
 193         if (connector->scaling_mode != DRM_MODE_SCALE_NONE &&
 194              connector->native_mode)
 195                 drm_mode_copy(adjusted_mode, connector->native_mode);
 196
 197         return true;
 198 }
 199
 200 static void
 201 nv50_dac_commit(struct drm_encoder *encoder)
 202 {
 203 }
 204
 205 static void
 206 nv50_dac_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
 207                   struct drm_display_mode *adjusted_mode)
 208 {
 209         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 210         struct drm_device *dev = encoder->dev;
 211         struct nouveau_channel *evo = nv50_display(dev)->master;
 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_KMS(dev, "or %d type %d crtc %d\n",
 217                      nv_encoder->or, nv_encoder->dcb->type, crtc->index);
 218
 219         nv50_dac_dpms(encoder, DRM_MODE_DPMS_ON);
 220
 221         if (crtc->index == 1)
 222                 mode_ctl |= NV50_EVO_DAC_MODE_CTRL_CRTC1;
 223         else
 224                 mode_ctl |= NV50_EVO_DAC_MODE_CTRL_CRTC0;
 225
 226         /* Lacking a working tv-out, this is not a 100% sure. */
 227         if (nv_encoder->dcb->type == OUTPUT_ANALOG)
 228                 mode_ctl |= 0x40;
 229         else
 230         if (nv_encoder->dcb->type == OUTPUT_TV)
 231                 mode_ctl |= 0x100;
 232
 233         if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
 234                 mode_ctl2 |= NV50_EVO_DAC_MODE_CTRL2_NHSYNC;
 235
 236         if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
 237                 mode_ctl2 |= NV50_EVO_DAC_MODE_CTRL2_NVSYNC;
 238
 239         ret = RING_SPACE(evo, 3);
 240         if (ret) {
 241                 NV_ERROR(dev, "no space while connecting DAC\n");
 242                 return;
 243         }
 244         BEGIN_NV04(evo, 0, NV50_EVO_DAC(nv_encoder->or, MODE_CTRL), 2);
 245         OUT_RING(evo, mode_ctl);
 246         OUT_RING(evo, mode_ctl2);
 247
 248         nv_encoder->crtc = encoder->crtc;
 249 }
 250
 251 static struct drm_crtc *
 252 nv50_dac_crtc_get(struct drm_encoder *encoder)
 253 {
 254         return nouveau_encoder(encoder)->crtc;
 255 }
 256
 257 static const struct drm_encoder_helper_funcs nv50_dac_helper_funcs = {
 258         .dpms = nv50_dac_dpms,
 259         .save = nv50_dac_save,
 260         .restore = nv50_dac_restore,
 261         .mode_fixup = nv50_dac_mode_fixup,
 262         .prepare = nv50_dac_disconnect,
 263         .commit = nv50_dac_commit,
 264         .mode_set = nv50_dac_mode_set,
 265         .get_crtc = nv50_dac_crtc_get,
 266         .detect = nv50_dac_detect,
 267         .disable = nv50_dac_disconnect
 268 };
 269
 270 static void
 271 nv50_dac_destroy(struct drm_encoder *encoder)
 272 {
 273         struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
 274
 275         if (!encoder)
 276                 return;
 277
 278         NV_DEBUG_KMS(encoder->dev, "\n");
 279
 280         drm_encoder_cleanup(encoder);
 281         kfree(nv_encoder);
 282 }
 283
 284 static const struct drm_encoder_funcs nv50_dac_encoder_funcs = {
 285         .destroy = nv50_dac_destroy,
 286 };
 287
 288 int
 289 nv50_dac_create(struct drm_connector *connector, struct dcb_entry *entry)
 290 {
 291         struct nouveau_encoder *nv_encoder;
 292         struct drm_encoder *encoder;
 293
 294         nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
 295         if (!nv_encoder)
 296                 return -ENOMEM;
 297         encoder = to_drm_encoder(nv_encoder);
 298
 299         nv_encoder->dcb = entry;
 300         nv_encoder->or = ffs(entry->or) - 1;
 301
 302         drm_encoder_init(connector->dev, encoder, &nv50_dac_encoder_funcs,
 303                          DRM_MODE_ENCODER_DAC);
 304         drm_encoder_helper_add(encoder, &nv50_dac_helper_funcs);
 305
 306         encoder->possible_crtcs = entry->heads;
 307         encoder->possible_clones = 0;
 308
 309         drm_mode_connector_attach_encoder(connector, encoder);
 310         return 0;
 311 }
 312