git.oblomov.eu Git - nouveau/blob - src/nv50_dac.c

   1 /*
   2  * Copyright (c) 2007 NVIDIA, Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included
  13  * in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  16  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  18  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  19  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  20  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  21  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include <unistd.h>
  25
  26 #define DPMS_SERVER
  27 #include <X11/extensions/dpms.h>
  28
  29 #include "nv_include.h"
  30 #include "nv50_display.h"
  31 #include "nv50_output.h"
  32
  33 static void
  34 NV50DacSetPClk(xf86OutputPtr output, int pclk)
  35 {
  36         NV50OutputWrite(output, 0x4280, 0);
  37 }
  38
  39 static void
  40 NV50DacDPMSSet(xf86OutputPtr output, int mode)
  41 {
  42         CARD32 tmp;
  43
  44         /*
  45          * DPMSModeOn       everything on
  46          * DPMSModeStandby  hsync disabled, vsync enabled
  47          * DPMSModeSuspend  hsync enabled, vsync disabled
  48          * DPMSModeOff      sync disabled
  49          */
  50         while(NV50OutputRead(output, 0xa004) & 0x80000000);
  51
  52         tmp = NV50OutputRead(output, 0xa004);
  53         tmp &= ~0x7f;
  54         tmp |= 0x80000000;
  55
  56         if(mode == DPMSModeStandby || mode == DPMSModeOff)
  57                 tmp |= 1;
  58         if(mode == DPMSModeSuspend || mode == DPMSModeOff)
  59                 tmp |= 4;
  60         if(mode != DPMSModeOn)
  61                 tmp |= 0x10;
  62         if(mode == DPMSModeOff)
  63                 tmp |= 0x40;
  64
  65         NV50OutputWrite(output, 0xa004, tmp);
  66 }
  67
  68 Bool
  69 NV50DacModeFixup(xf86OutputPtr output, DisplayModePtr mode,
  70                  DisplayModePtr adjusted_mode)
  71 {
  72         return TRUE;
  73 }
  74
  75 static void
  76 NV50DacModeSet(xf86OutputPtr output, DisplayModePtr mode,
  77                 DisplayModePtr adjusted_mode)
  78 {
  79         ScrnInfoPtr pScrn = output->scrn;
  80         NV50OutputPrivPtr nv_output = output->driver_private;
  81         const int dacOff = 0x80 * nv_output->or;
  82
  83         if(!adjusted_mode) {
  84                 NV50DisplayCommand(pScrn, 0x400 + dacOff, 0);
  85                 return;
  86         }
  87
  88         // This wouldn't be necessary, but the server is stupid and calls
  89         // NV50DacDPMSSet after the output is disconnected, even though the hardware
  90         // turns it off automatically.
  91         NV50DacDPMSSet(output, DPMSModeOn);
  92
  93         NV50DisplayCommand(pScrn, 0x400 + dacOff,
  94                 (NV50CrtcGetHead(output->crtc) == HEAD0 ? 1 : 2) | 0x40);
  95
  96         NV50DisplayCommand(pScrn, 0x404 + dacOff,
  97                 (adjusted_mode->Flags & V_NHSYNC) ? 1 : 0 |
  98                 (adjusted_mode->Flags & V_NVSYNC) ? 2 : 0);
  99
 100         NV50CrtcSetScale(output->crtc, adjusted_mode, NV50_SCALE_OFF);
 101 }
 102
 103 /*
 104  * Perform DAC load detection to determine if there is a connected display.
 105  */
 106 static xf86OutputStatus
 107 NV50DacDetect(xf86OutputPtr output)
 108 {
 109         NV50OutputPrivPtr nv_output = output->driver_private;
 110
 111         /* Assume physical status isn't going to change before the BlockHandler */
 112         if(nv_output->cached_status != XF86OutputStatusUnknown)
 113                 return nv_output->cached_status;
 114
 115         NV50OutputPartnersDetect(output, nv_output->partner, nv_output->i2c);
 116         return nv_output->cached_status;
 117 }
 118
 119 Bool
 120 NV50DacLoadDetect(xf86OutputPtr output)
 121 {
 122         ScrnInfoPtr pScrn = output->scrn;
 123         NVPtr pNv = NVPTR(pScrn);
 124         NV50OutputPrivPtr nv_output = output->driver_private;
 125         const int scrnIndex = pScrn->scrnIndex;
 126         int sigstate;
 127         CARD32 load, tmp, tmp2;
 128
 129         xf86DrvMsg(scrnIndex, X_PROBED, "Trying load detection on VGA%i ... ",
 130                 nv_output->or);
 131
 132         NV50OutputWrite(output, 0xa010, 0x00000001);
 133         tmp2 = NV50OutputRead(output, 0xa004);
 134
 135         NV50OutputWrite(output, 0xa004, 0x80150000);
 136         while(NV50OutputRead(output, 0xa004) & 0x80000000);
 137         tmp = (pNv->NVArch == 0x50) ? 420 : 340;
 138         NV50OutputWrite(output, 0xa00c, tmp | 0x100000);
 139         sigstate = xf86BlockSIGIO();
 140         usleep(45000);
 141         xf86UnblockSIGIO(sigstate);
 142         load = NV50OutputRead(output, 0xa00c);
 143         NV50OutputWrite(output, 0xa00c, 0);
 144         NV50OutputWrite(output, 0xa004, 0x80000000 | tmp2);
 145
 146         // Use this DAC if all three channels show load.
 147         if((load & 0x38000000) == 0x38000000) {
 148                 xf86ErrorF("found one!\n");
 149                 return TRUE;
 150         }
 151
 152         xf86ErrorF("nothing.\n");
 153         return FALSE;
 154 }
 155
 156 static void
 157 NV50DacDestroy(xf86OutputPtr output)
 158 {
 159         NV50OutputDestroy(output);
 160
 161         xfree(output->driver_private);
 162         output->driver_private = NULL;
 163 }
 164
 165 static const xf86OutputFuncsRec NV50DacOutputFuncs = {
 166         .dpms = NV50DacDPMSSet,
 167         .save = NULL,
 168         .restore = NULL,
 169         .mode_valid = NV50OutputModeValid,
 170         .mode_fixup = NV50DacModeFixup,
 171         .prepare = NV50OutputPrepare,
 172         .commit = NV50OutputCommit,
 173         .mode_set = NV50DacModeSet,
 174         .detect = NV50DacDetect,
 175         .get_modes = NV50OutputGetDDCModes,
 176         .destroy = NV50DacDestroy,
 177 };
 178
 179 xf86OutputPtr
 180 NV50CreateDac(ScrnInfoPtr pScrn, ORNum or)
 181 {
 182         NV50OutputPrivPtr nv_output = xnfcalloc(sizeof(*nv_output), 1);
 183         xf86OutputPtr output;
 184         char orName[5];
 185
 186         if(!nv_output)
 187                 return NULL;
 188
 189         snprintf(orName, 5, "VGA%i", or);
 190         output = xf86OutputCreate(pScrn, &NV50DacOutputFuncs, orName);
 191
 192         nv_output->type = DAC;
 193         nv_output->or = or;
 194         nv_output->cached_status = XF86OutputStatusUnknown;
 195         nv_output->set_pclk = NV50DacSetPClk;
 196         output->driver_private = nv_output;
 197         output->interlaceAllowed = TRUE;
 198         output->doubleScanAllowed = TRUE;
 199
 200         return output;
 201 }
 202