randr12: Improve TMDS and LVDS registers (and enable for LVDS).

[nouveau] / src / nv_output.c

/*
 * Copyright 2006 Dave Airlie
 * Copyright 2007 Maarten Maathuis
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
/*
 * this code uses ideas taken from the NVIDIA nv driver - the nvidia license
 * decleration is at the bottom of this file as it is rather ugly 
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "xf86.h"
#include "os.h"
#include "mibank.h"
#include "globals.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86DDC.h"
#include "mipointer.h"
#include "windowstr.h"
#include <randrstr.h>
#include <X11/extensions/render.h>

#include "xf86Crtc.h"
#include "nv_include.h"

const char *OutputType[] = {
    "None",
    "VGA",
    "DVI",
    "LVDS",
    "S-video",
    "Composite",
};

const char *MonTypeName[7] = {
    "AUTO",
    "NONE",
    "CRT",
    "LVDS",
    "TMDS",
    "CTV",
    "STV"
};

/* 
 * TMDS registers are indirect 8 bit registers.
 * Reading is straightforward, writing a bit odd.
 * Reading: Write adress (+write protect bit, do not forget this), then read value.
 * Writing: Write adress (+write protect bit), write value, write adress again and write it again (+write protect bit).
 */

void NVWriteTMDS(NVPtr pNv, int ramdac, CARD32 tmds_reg, CARD32 val)
{
        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_FP_TMDS_CONTROL, 
                (tmds_reg & 0xff) | NV_RAMDAC_FP_TMDS_CONTROL_WRITE_DISABLE);

        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_FP_TMDS_DATA, val & 0xff);

        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_FP_TMDS_CONTROL, tmds_reg & 0xff);
        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_FP_TMDS_CONTROL, 
                (tmds_reg & 0xff) | NV_RAMDAC_FP_TMDS_CONTROL_WRITE_DISABLE);
}

CARD8 NVReadTMDS(NVPtr pNv, int ramdac, CARD32 tmds_reg)
{
        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_FP_TMDS_CONTROL, 
                (tmds_reg & 0xff) | NV_RAMDAC_FP_TMDS_CONTROL_WRITE_DISABLE);

        return (nvReadRAMDAC(pNv, ramdac, NV_RAMDAC_FP_TMDS_DATA) & 0xff);
}

void NVOutputWriteTMDS(xf86OutputPtr output, CARD32 tmds_reg, CARD32 val)
{
        NVOutputPrivatePtr nv_output = output->driver_private;
        ScrnInfoPtr     pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        int ramdac;

        /* Is TMDS programmed on a different output? */
        /* Always choose the prefered ramdac, since that one contains the tmds stuff */
        /* Assumption: there is always once output that can only run of the primary ramdac */
        if (nv_output->valid_ramdac & RAMDAC_1) {
                ramdac = 1;
        } else {
                ramdac = 0;
        }

        NVWriteTMDS(pNv, ramdac, tmds_reg, val);
}

CARD8 NVOutputReadTMDS(xf86OutputPtr output, CARD32 tmds_reg)
{
        NVOutputPrivatePtr nv_output = output->driver_private;
        ScrnInfoPtr     pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        int ramdac;

        /* Is TMDS programmed on a different output? */
        /* Always choose the prefered ramdac, since that one contains the tmds stuff */
        /* Assumption: there is always once output that can only run of the primary ramdac */
        if (nv_output->valid_ramdac & RAMDAC_1) {
                ramdac = 1;
        } else {
                ramdac = 0;
        }

        return NVReadTMDS(pNv, ramdac, tmds_reg);
}

void NVOutputWriteRAMDAC(xf86OutputPtr output, CARD32 ramdac_reg, CARD32 val)
{
    NVOutputPrivatePtr nv_output = output->driver_private;
    ScrnInfoPtr pScrn = output->scrn;
    NVPtr pNv = NVPTR(pScrn);

    nvWriteRAMDAC(pNv, nv_output->ramdac, ramdac_reg, val);
}

CARD32 NVOutputReadRAMDAC(xf86OutputPtr output, CARD32 ramdac_reg)
{
    NVOutputPrivatePtr nv_output = output->driver_private;
    ScrnInfoPtr pScrn = output->scrn;
    NVPtr pNv = NVPTR(pScrn);

    return nvReadRAMDAC(pNv, nv_output->ramdac, ramdac_reg);
}

static void nv_output_backlight_enable(xf86OutputPtr output,  Bool on)
{
        ScrnInfoPtr pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);

        ErrorF("nv_output_backlight_enable is called for output %s to turn %s\n", output->name, on ? "on" : "off");

        /* This is done differently on each laptop.  Here we
         * define the ones we know for sure. */

#if defined(__powerpc__)
        if ((pNv->Chipset == 0x10DE0179) ||
            (pNv->Chipset == 0x10DE0189) ||
            (pNv->Chipset == 0x10DE0329)) {
                /* NV17,18,34 Apple iMac, iBook, PowerBook */
                CARD32 tmp_pmc, tmp_pcrt;
                tmp_pmc = nvReadMC(pNv, 0x10F0) & 0x7FFFFFFF;
                tmp_pcrt = nvReadCRTC0(pNv, NV_CRTC_081C) & 0xFFFFFFFC;
                if (on) {
                        tmp_pmc |= (1 << 31);
                        tmp_pcrt |= 0x1;
                }
                nvWriteMC(pNv, 0x10F0, tmp_pmc);
                nvWriteCRTC0(pNv, NV_CRTC_081C, tmp_pcrt);
        }
#endif

        if(pNv->twoHeads && ((pNv->Chipset & 0x0ff0) != CHIPSET_NV11))
                nvWriteMC(pNv, 0x130C, on ? 3 : 7);
}

static void
nv_lvds_output_dpms(xf86OutputPtr output, int mode)
{
        NVOutputPrivatePtr nv_output = output->driver_private;
        NVPtr pNv = NVPTR(output->scrn);

        if (nv_output->ramdac != -1 && mode != DPMSModeOff) {
                /* This was not a modeset, but a normal dpms call */
                pNv->ramdac_active[nv_output->ramdac] = TRUE;
                ErrorF("Activating ramdac %d\n", nv_output->ramdac);
                nv_output->ramdac_assigned = TRUE;
        }

        switch (mode) {
        case DPMSModeStandby:
        case DPMSModeSuspend:
        case DPMSModeOff:
                nv_output_backlight_enable(output, 0);
                break;
        case DPMSModeOn:
                nv_output_backlight_enable(output, 1);
        default:
                break;
        }

        /* We may be going for modesetting, so we must reset the ramdacs */
        if (nv_output->ramdac != -1 && mode == DPMSModeOff) {
                pNv->ramdac_active[nv_output->ramdac] = FALSE;
                ErrorF("Deactivating ramdac %d\n", nv_output->ramdac);
                nv_output->ramdac_assigned = FALSE;
        }
}

static void
nv_analog_output_dpms(xf86OutputPtr output, int mode)
{
        xf86CrtcPtr crtc = output->crtc;
        NVOutputPrivatePtr nv_output = output->driver_private;
        NVPtr pNv = NVPTR(output->scrn);

        ErrorF("nv_analog_output_dpms is called with mode %d\n", mode);

        if (nv_output->ramdac != -1) {
                /* We may be going for modesetting, so we must reset the ramdacs */
                if (mode == DPMSModeOff) {
                        pNv->ramdac_active[nv_output->ramdac] = FALSE;
                        ErrorF("Deactivating ramdac %d\n", nv_output->ramdac);
                        nv_output->ramdac_assigned = FALSE;
                        /* This was not a modeset, but a normal dpms call */
                } else {
                        pNv->ramdac_active[nv_output->ramdac] = TRUE;
                        ErrorF("Activating ramdac %d\n", nv_output->ramdac);
                        nv_output->ramdac_assigned = TRUE;
                }
        }

        if (crtc) {
                NVCrtcPrivatePtr nv_crtc = crtc->driver_private;

                ErrorF("nv_analog_output_dpms is called for CRTC %d with mode %d\n", nv_crtc->crtc, mode);
        }
}

static void
nv_tmds_output_dpms(xf86OutputPtr output, int mode)
{
        xf86CrtcPtr crtc = output->crtc;
        NVOutputPrivatePtr nv_output = output->driver_private;
        NVPtr pNv = NVPTR(output->scrn);

        ErrorF("nv_tmds_output_dpms is called with mode %d\n", mode);

        /* We just woke up again from an actual monitor dpms and not a modeset prepare */
        /* Put here since we actually need our ramdac to wake up again ;-) */
        if (nv_output->ramdac != -1 && mode != DPMSModeOff) {
                pNv->ramdac_active[nv_output->ramdac] = TRUE;
                nv_output->ramdac_assigned = TRUE;
                ErrorF("Activating ramdac %d\n", nv_output->ramdac);
        }

        /* Are we assigned a ramdac already?, else we will be activated during mode set */
        if (crtc && nv_output->ramdac != -1) {
                NVCrtcPrivatePtr nv_crtc = crtc->driver_private;

                ErrorF("nv_tmds_output_dpms is called for CRTC %d with mode %d\n", nv_crtc->crtc, mode);

                CARD32 fpcontrol = nvReadRAMDAC(pNv, nv_output->ramdac, NV_RAMDAC_FP_CONTROL);
                switch(mode) {
                        case DPMSModeStandby:
                        case DPMSModeSuspend:
                        case DPMSModeOff:
                                /* cut the TMDS output */           
                                fpcontrol |= 0x20000022;
                                break;
                        case DPMSModeOn:
                                /* disable cutting the TMDS output */
                                fpcontrol &= ~0x20000022;
                                break;
                }
                nvWriteRAMDAC(pNv, nv_output->ramdac, NV_RAMDAC_FP_CONTROL, fpcontrol);
        }

        /* We may be going for modesetting, so we must reset the ramdacs */
        if (nv_output->ramdac != -1 && mode == DPMSModeOff) {
                pNv->ramdac_active[nv_output->ramdac] = FALSE;
                nv_output->ramdac_assigned = FALSE;
                ErrorF("Deactivating ramdac %d\n", nv_output->ramdac);
        }
}

/* This sequence is an optimized/shortened version of what the blob does */
uint32_t tmds_regs_nv40[] = { 0x04, 0x05, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x40, 0x43, 0x00, 0x01, 0x02, 0x2e, 0x2f, 0x3a };
uint32_t tmds_regs_nv30[] = { 0x04, 0x05, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x29, 0x2a, 0x00, 0x01, 0x02, 0x2e, 0x2f, 0x3a };

#define TMDS_REGS(index) ( tmds_regs(pNv, index) )

uint32_t tmds_regs(NVPtr pNv, int i)
{
        if (pNv->Architecture == NV_ARCH_40) {
                return tmds_regs_nv40[i];
        } else {
                return tmds_regs_nv30[i];
        }
}

#define TMDS_SIZE ( tmds_size(pNv) )

uint32_t tmds_size(NVPtr pNv)
{
        if (pNv->Architecture == NV_ARCH_40) {
                return(sizeof(tmds_regs_nv40)/sizeof(tmds_regs_nv40[0]));
        } else {
                return(sizeof(tmds_regs_nv30)/sizeof(tmds_regs_nv30[0]));
        }
}

void nv_output_save_state_ext(xf86OutputPtr output, RIVA_HW_STATE *state, Bool override)
{
        NVOutputPrivatePtr nv_output = output->driver_private;
        ScrnInfoPtr pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        NVOutputRegPtr regp;
        int i;

        regp = &state->dac_reg[nv_output->ramdac];
        regp->test_control      = NVOutputReadRAMDAC(output, NV_RAMDAC_TEST_CONTROL);
        regp->unk_670   = NVOutputReadRAMDAC(output, NV_RAMDAC_670);
        state->config       = nvReadFB(pNv, NV_PFB_CFG0);

        //regp->unk_900         = NVOutputReadRAMDAC(output, NV_RAMDAC_900);

        /* This exists purely for proper text mode restore */
        if (override) regp->output = NVOutputReadRAMDAC(output, NV_RAMDAC_OUTPUT);

        for (i = 0; i < TMDS_SIZE; i++) {
                regp->TMDS[TMDS_REGS(i)] = NVOutputReadTMDS(output, TMDS_REGS(i));
        }
}

void nv_output_load_state_ext(xf86OutputPtr output, RIVA_HW_STATE *state, Bool override)
{
        NVOutputPrivatePtr nv_output = output->driver_private;
        NVOutputRegPtr regp;
        ScrnInfoPtr pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        int i;

        regp = &state->dac_reg[nv_output->ramdac];

        /* This exists purely for proper text mode restore */
        if (override) NVOutputWriteRAMDAC(output, NV_RAMDAC_OUTPUT, regp->output);

        //NVOutputWriteRAMDAC(output, NV_RAMDAC_900, regp->unk_900);

        NVOutputWriteRAMDAC(output, NV_RAMDAC_TEST_CONTROL, regp->test_control);
        NVOutputWriteRAMDAC(output, NV_RAMDAC_670, regp->unk_670);

        for (i = 0; i < TMDS_SIZE; i++) {
                NVOutputWriteTMDS(output, TMDS_REGS(i), regp->TMDS[TMDS_REGS(i)]);
        }
}

/* NOTE: Don't rely on this data for anything other than restoring VT's */

static void
nv_output_save (xf86OutputPtr output)
{
        ScrnInfoPtr     pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        RIVA_HW_STATE *state;
        NVOutputPrivatePtr nv_output = output->driver_private;
        int ramdac_backup = nv_output->ramdac;

        ErrorF("nv_output_save is called\n");

        /* This is early init and we have not yet been assigned a ramdac */
        /* Always choose the prefered ramdac, for consistentcy */
        /* Assumption: there is always once output that can only run of the primary ramdac */
        if (nv_output->valid_ramdac & RAMDAC_1) {
                nv_output->ramdac = 1;
        } else {
                nv_output->ramdac = 0;
        }

        state = &pNv->SavedReg;

        /* Due to strange mapping of outputs we could have swapped analog and digital */
        /* So we force save all the registers */
        nv_output_save_state_ext(output, state, TRUE);

        /* restore previous state */
        nv_output->ramdac = ramdac_backup;
}

static void
nv_output_restore (xf86OutputPtr output)
{
        ScrnInfoPtr pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        RIVA_HW_STATE *state;
        NVOutputPrivatePtr nv_output = output->driver_private;
        int ramdac_backup = nv_output->ramdac;

        ErrorF("nv_output_restore is called\n");

        /* We want consistent mode restoring and the ramdac entry is variable */
        /* Always choose the prefered ramdac, for consistentcy */
        /* Assumption: there is always once output that can only run of the primary ramdac */
        if (nv_output->valid_ramdac & RAMDAC_1) {
                nv_output->ramdac = 1;
        } else {
                nv_output->ramdac = 0;
        }

        state = &pNv->SavedReg;

        /* Due to strange mapping of outputs we could have swapped analog and digital */
        /* So we force load all the registers */
        nv_output_load_state_ext(output, state, TRUE);

        /* restore previous state */
        nv_output->ramdac = ramdac_backup;
}

static int
nv_output_mode_valid(xf86OutputPtr output, DisplayModePtr pMode)
{
        if (pMode->Flags & V_DBLSCAN)
                return MODE_NO_DBLESCAN;

        if (pMode->Clock > 400000 || pMode->Clock < 25000)
                return MODE_CLOCK_RANGE;

        return MODE_OK;
}


static Bool
nv_output_mode_fixup(xf86OutputPtr output, DisplayModePtr mode,
                     DisplayModePtr adjusted_mode)
{
        ErrorF("nv_output_mode_fixup is called\n");

        return TRUE;
}

static void
nv_output_mode_set_regs(xf86OutputPtr output, DisplayModePtr mode, DisplayModePtr adjusted_mode)
{
        NVOutputPrivatePtr nv_output = output->driver_private;
        ScrnInfoPtr pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        RIVA_HW_STATE *state, *sv_state;
        Bool is_fp = FALSE;
        Bool is_lvds = FALSE;
        NVOutputRegPtr regp, regp2, savep;
        xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);
        int i;

        xf86CrtcPtr crtc = output->crtc;
        NVCrtcPrivatePtr nv_crtc = crtc->driver_private;

        state = &pNv->ModeReg;
        regp = &state->dac_reg[nv_output->ramdac];
        /* The other ramdac */
        regp2 = &state->dac_reg[(~(nv_output->ramdac)) & 1];

        sv_state = &pNv->SavedReg;
        savep = &sv_state->dac_reg[nv_output->ramdac];

        if ((nv_output->type == OUTPUT_LVDS) || (nv_output->type == OUTPUT_TMDS)) {
                is_fp = TRUE;
                if (nv_output->type == OUTPUT_LVDS) {
                        is_lvds = TRUE;
                }
        }

        /* This is just a guess, there are probably more registers which need setting */
        /* But we must start somewhere ;-) */
        if (is_fp) {
                regp->TMDS[0x4] = 0x80;
                /* Enable crosswired mode */
                /* This will upset the monitor, trust me, i know it :-( */
                /* Now allowed for non-bios inited systems */
                if (nv_crtc->head != nv_output->preferred_crtc) {
                        regp->TMDS[0x4] |= (1 << 3);
                }

                if (is_lvds) {
                        regp->TMDS[0x4] |= (1 << 0);
                }
        }

        /* The TMDS game begins */
        /* A few registers are also programmed on non-tmds monitors */
        /* At the moment i can't give rationale for these values */
        if (!is_fp) {
                regp->TMDS[0x2e] = 0x80;
                regp->TMDS[0x2f] = 0xff;
                regp->TMDS[0x33] = 0xfe;
        } else {
                NVCrtcPrivatePtr nv_crtc = output->crtc->driver_private;
                uint32_t pll_setup_control = nvReadRAMDAC(pNv, 0, NV_RAMDAC_PLL_SETUP_CONTROL);
                regp->TMDS[0x2b] = 0x7d;
                regp->TMDS[0x2c] = 0x0;
                /* Various combinations exist for lvds, 0x08, 0x48, 0xc8, 0x88 */
                /* 0x88 seems most popular and (maybe) the end setting */
                if (is_lvds) {
                        if (pNv->Architecture == NV_ARCH_40) {
                                regp->TMDS[0x2e] = 0x88;
                        } else {
                                /* observed on nv31m */
                                regp->TMDS[0x2e] = 0x0;
                        }
                } else {
                        if (nv_crtc->head == 1) {
                                regp->TMDS[0x2e] = 0x81;
                        } else {
                                regp->TMDS[0x2e] = 0x85;
                        }
                }
                /* 0x08 is also seen for lvds */
                regp->TMDS[0x2f] = 0x21;
                regp->TMDS[0x30] = 0x0;
                regp->TMDS[0x31] = 0x0;
                regp->TMDS[0x32] = 0x0;
                regp->TMDS[0x33] = 0xf0;
                /* 0x00 is also seen for lvds */
                regp->TMDS[0x3a] = 0x80;

                /* Here starts the registers that may cause problems for some */
                /* This an educated guess */
                if (pNv->Architecture == NV_ARCH_40 && pNv->misc_info.reg_c040 & (1 << 10)) {
                        regp->TMDS[0x5] = 0x68;
                } else {
                        regp->TMDS[0x5] = 0x6e;
                }

                if (is_lvds) {
                        if (pNv->Architecture == NV_ARCH_40) {
                                regp->TMDS[0x0] = 0x61;
                        } else {
                                /* observed on a nv31m */
                                regp->TMDS[0x0] = 0x71;
                        }
                } else {
                        /* This seems to be related to PLL_SETUP_CONTROL */
                        /* When PLL_SETUP_CONTROL ends with 0x1c, then this value is 0xc1 */
                        /* Otherwise 0xf1 */
                        if ((pll_setup_control & 0xff) == 0x1c) {
                                regp->TMDS[0x0] = 0xc1;
                        } else {
                                regp->TMDS[0x0] = 0xf1;
                        }
                }

                /* This is also related to PLL_SETUP_CONTROL, exactly how is unknown */
                if (pll_setup_control == 0) {
                        regp->TMDS[0x1] = 0x0;
                } else {
                        if (nvReadRAMDAC(pNv, 0, NV_RAMDAC_SEL_CLK) & (1<<12)) {
                                regp->TMDS[0x1] = 0x41;
                        } else {
                                regp->TMDS[0x1] = 0x42;
                        }
                }

                if (is_lvds) {
                        regp->TMDS[0x2] = 0x0;
                } else {
                        if (pll_setup_control == 0x0) {
                                regp->TMDS[0x2] = 0x90;
                        } else {
                                regp->TMDS[0x2] = 0x89;
                        }
                }

                /* I assume they are zero for !is_lvds */
                if (is_lvds && pNv->Architecture == NV_ARCH_40) {
                        /* Observed values are 0x11 and 0x14, TODO: this needs refinement */
                        regp->TMDS[0x40] = 0x14;
                        regp->TMDS[0x43] = 0xb0;
                }
        }

        /* Put test control into what seems to be the neutral position */
        if (pNv->NVArch < 0x44) {
                regp->test_control = 0x00000000;
        } else {
                regp->test_control = 0x00100000;
        }

        /* This is a similar register to test control */
        regp->unk_670 = regp->test_control;

        /* This may be causing problems */
        //regp->unk_900 = 0x10000;

        if (output->crtc) {
                NVCrtcPrivatePtr nv_crtc = output->crtc->driver_private;
                int two_crt = FALSE;
                int two_mon = FALSE;

                for (i = 0; i < config->num_output; i++) {
                        NVOutputPrivatePtr nv_output2 = config->output[i]->driver_private;

                        /* is it this output ?? */
                        if (config->output[i] == output)
                                continue;

                        /* it the output connected */
                        if (config->output[i]->crtc == NULL)
                                continue;

                        two_mon = TRUE;
                        if ((nv_output2->type == OUTPUT_ANALOG) && (nv_output->type == OUTPUT_ANALOG)) {
                                two_crt = TRUE;
                        }
                }

                ErrorF("%d: crtc %d ramdac %d twocrt %d twomon %d\n", is_fp, nv_crtc->crtc, nv_output->ramdac, two_crt, two_mon);
        }
}

static void
nv_output_mode_set_routing(xf86OutputPtr output)
{
        NVOutputPrivatePtr nv_output = output->driver_private;
        xf86CrtcPtr crtc = output->crtc;
        NVCrtcPrivatePtr nv_crtc = crtc->driver_private;
        ScrnInfoPtr     pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        Bool is_fp = FALSE;
        int other_ramdac = 0;

        uint32_t output_reg = nvReadRAMDAC(pNv, nv_output->ramdac, NV_RAMDAC_OUTPUT);

        if ((nv_output->type == OUTPUT_LVDS) || (nv_output->type == OUTPUT_TMDS)) {
                is_fp = TRUE;
        }

        if (is_fp) {
                output_reg = 0x0;
        } else { 
                output_reg = NV_RAMDAC_OUTPUT_DAC_ENABLE;
        }

        if (nv_crtc->head == 1) {
                output_reg |= NV_RAMDAC_OUTPUT_SELECT_VPLL2;
        } else {
                output_reg &= ~NV_RAMDAC_OUTPUT_SELECT_VPLL2;
        }

        if (nv_output->ramdac == 1) {
                other_ramdac = 0;
        } else {
                other_ramdac = 1;
        }

        uint32_t output2_reg = nvReadRAMDAC(pNv, other_ramdac, NV_RAMDAC_OUTPUT);
        
        if (nv_crtc->head == 1) {
                output2_reg &= ~NV_RAMDAC_OUTPUT_SELECT_VPLL2;
        } else {
                output2_reg |= NV_RAMDAC_OUTPUT_SELECT_VPLL2;
        }

        nvWriteRAMDAC(pNv, nv_output->ramdac, NV_RAMDAC_OUTPUT, output_reg);
        nvWriteRAMDAC(pNv, other_ramdac, NV_RAMDAC_OUTPUT, output2_reg);
}

static void
nv_output_mode_set(xf86OutputPtr output, DisplayModePtr mode,
                   DisplayModePtr adjusted_mode)
{
    ScrnInfoPtr pScrn = output->scrn;
    NVPtr pNv = NVPTR(pScrn);
    RIVA_HW_STATE *state;

        ErrorF("nv_output_mode_set is called\n");

    state = &pNv->ModeReg;

    nv_output_mode_set_regs(output, mode, adjusted_mode);
    nv_output_load_state_ext(output, state, FALSE);
        nv_output_mode_set_routing(output);
}

static xf86MonPtr
nv_get_edid(xf86OutputPtr output)
{
        /* no use for shared DDC output */
        NVOutputPrivatePtr nv_output = output->driver_private;
        xf86MonPtr ddc_mon;

        if (nv_output->pDDCBus == NULL)
                return NULL;

        ddc_mon = xf86OutputGetEDID(output, nv_output->pDDCBus);
        if (!ddc_mon)
                return NULL;

        if (ddc_mon->features.input_type && (nv_output->type == OUTPUT_ANALOG))
                goto invalid;

        if ((!ddc_mon->features.input_type) && (nv_output->type == OUTPUT_TMDS ||
                                nv_output->type == OUTPUT_LVDS))
                goto invalid;

        return ddc_mon;

invalid:
        xfree(ddc_mon);
        return NULL;
}

static Bool
nv_ddc_detect(xf86OutputPtr output)
{
        xf86MonPtr m = nv_get_edid(output);

        if (m == NULL)
                return FALSE;

        xfree(m);
        return TRUE;
}

static Bool
nv_crt_load_detect(xf86OutputPtr output)
{
        ScrnInfoPtr pScrn = output->scrn;
        NVOutputPrivatePtr nv_output = output->driver_private;
        NVPtr pNv = NVPTR(pScrn);
        CARD32 reg_output, reg_test_ctrl, temp;
        Bool present = FALSE;
        int ramdac;

        /* Usually these outputs are native to ramdac 1 */
        if (nv_output->valid_ramdac & RAMDAC_0 && nv_output->valid_ramdac & RAMDAC_1) {
                ramdac = 1;
        } else if (nv_output->valid_ramdac & RAMDAC_1) {
                ramdac = 1;
        } else if (nv_output->valid_ramdac & RAMDAC_0) {
                ramdac = 0;
        } else {
                return FALSE;
        }

        /* For some reason we get false positives on ramdac 1, maybe due tv-out? */
        if (ramdac == 1) {
                return FALSE;
        }

        if (nv_output->pDDCBus != NULL) {
                xf86MonPtr ddc_mon = xf86OutputGetEDID(output, nv_output->pDDCBus);
                /* Is there a digital flatpanel on this channel? */
                if (ddc_mon && ddc_mon->features.input_type) {
                        return FALSE;
                }
        }

        reg_output = nvReadRAMDAC(pNv, ramdac, NV_RAMDAC_OUTPUT);
        reg_test_ctrl = nvReadRAMDAC(pNv, ramdac, NV_RAMDAC_TEST_CONTROL);

        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_TEST_CONTROL, (reg_test_ctrl & ~0x00010000));

        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_OUTPUT, (reg_output & 0x0000FEEE));
        usleep(1000);

        temp = nvReadRAMDAC(pNv, ramdac, NV_RAMDAC_OUTPUT);
        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_OUTPUT, temp | 1);

        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_TEST_DATA, 0x94050140);
        temp = nvReadRAMDAC(pNv, ramdac, NV_RAMDAC_TEST_CONTROL);
        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_TEST_CONTROL, temp | 0x1000);

        usleep(1000);

        present = (nvReadRAMDAC(pNv, ramdac, NV_RAMDAC_TEST_CONTROL) & (1 << 28)) ? TRUE : FALSE;

        temp = NVOutputReadRAMDAC(output, NV_RAMDAC_TEST_CONTROL);
        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_TEST_CONTROL, temp & 0x000EFFF);

        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_OUTPUT, reg_output);
        nvWriteRAMDAC(pNv, ramdac, NV_RAMDAC_TEST_CONTROL, reg_test_ctrl);

        if (present) {
                ErrorF("A crt was detected on ramdac %d with no ddc support\n", ramdac);
                return TRUE;
        }

        return FALSE;
}

static xf86OutputStatus
nv_tmds_output_detect(xf86OutputPtr output)
{
        ErrorF("nv_tmds_output_detect is called\n");

        if (nv_ddc_detect(output))
                return XF86OutputStatusConnected;

        return XF86OutputStatusDisconnected;
}


static xf86OutputStatus
nv_analog_output_detect(xf86OutputPtr output)
{
        ErrorF("nv_analog_output_detect is called\n");

        if (nv_ddc_detect(output))
                return XF86OutputStatusConnected;

        if (nv_crt_load_detect(output))
                return XF86OutputStatusConnected;

        return XF86OutputStatusDisconnected;
}

static DisplayModePtr
nv_output_get_modes(xf86OutputPtr output)
{
        NVOutputPrivatePtr nv_output = output->driver_private;
        xf86MonPtr ddc_mon;
        DisplayModePtr ddc_modes;

        ErrorF("nv_output_get_modes is called\n");

        ddc_mon = nv_get_edid(output);

        xf86OutputSetEDID(output, ddc_mon);

        if (ddc_mon == NULL)
                return NULL;

        ddc_modes = xf86OutputGetEDIDModes (output);

        if (nv_output->type == OUTPUT_TMDS || nv_output->type == OUTPUT_LVDS) {
                int i;
                DisplayModePtr mode;

                for (i = 0; i < 4; i++) {
                        /* We only look at detailed timings atm */
                        if (ddc_mon->det_mon[i].type != DT)
                                continue;
                        /* Selecting only based on width ok? */
                        if (ddc_mon->det_mon[i].section.d_timings.h_active > nv_output->fpWidth) {
                                nv_output->fpWidth = ddc_mon->det_mon[i].section.d_timings.h_active;
                                nv_output->fpHeight = ddc_mon->det_mon[i].section.d_timings.v_active;
                        }
                }

                /* Add a native resolution mode that is preferred */
                /* Reduced blanking should be fine on DVI monitor */
                nv_output->native_mode = xf86CVTMode(nv_output->fpWidth, nv_output->fpHeight, 60.0, TRUE, FALSE);
                nv_output->native_mode->type = M_T_DRIVER | M_T_PREFERRED;
                /* We want the new mode to be preferred */
                for (mode = ddc_modes; mode != NULL; mode = mode->next) {
                        if (mode->type & M_T_PREFERRED) {
                                mode->type &= ~M_T_PREFERRED;
                        }
                }
                ddc_modes = xf86ModesAdd(ddc_modes, nv_output->native_mode);
        }

        return ddc_modes;
}

static void
nv_output_destroy (xf86OutputPtr output)
{
        ErrorF("nv_output_destroy is called\n");
        if (output->driver_private)
                xfree (output->driver_private);
}

static void
nv_clear_ramdac_from_outputs(xf86OutputPtr output, int ramdac)
{
        int i;
        ScrnInfoPtr pScrn = output->scrn;
        xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
        xf86OutputPtr output2;
        NVOutputPrivatePtr nv_output2;
        for (i = 0; i < xf86_config->num_output; i++) {
                output2 = xf86_config->output[i];
                nv_output2 = output2->driver_private;
                if (nv_output2->ramdac == ramdac && output != output2) {
                        nv_output2->ramdac = -1;
                        nv_output2->ramdac_assigned = FALSE;
                        break;
                }
        }
}

static void
nv_output_prepare(xf86OutputPtr output)
{
        ErrorF("nv_output_prepare is called\n");
        NVOutputPrivatePtr nv_output = output->driver_private;
        ScrnInfoPtr     pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        Bool stole_ramdac = FALSE;
        xf86OutputPtr output2 = NULL;

        output->funcs->dpms(output, DPMSModeOff);

        if (nv_output->ramdac_assigned) {
                ErrorF("We already have a ramdac.\n");
                return;
        }

        /* We need ramdac 0, so let's steal it */
        if (!(nv_output->valid_ramdac & RAMDAC_1) && pNv->ramdac_active[0]) {
                ErrorF("Stealing ramdac0 ;-)\n");
                int i;
                xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
                NVOutputPrivatePtr nv_output2;
                for (i = 0; i < xf86_config->num_output; i++) {
                        output2 = xf86_config->output[i];
                        nv_output2 = output2->driver_private;
                        if (nv_output2->ramdac == 0 && output != output2) {
                                nv_output2->ramdac = -1;
                                nv_output2->ramdac_assigned = FALSE;
                                break;
                        }
                }
                pNv->ramdac_active[0] = FALSE;
                stole_ramdac = TRUE;
        }

        /* We need ramdac 1, so let's steal it */
        if (!(nv_output->valid_ramdac & RAMDAC_0) && pNv->ramdac_active[1]) {
                ErrorF("Stealing ramdac1 ;-)\n");
                int i;
                xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
                NVOutputPrivatePtr nv_output2;
                for (i = 0; i < xf86_config->num_output; i++) {
                        output2 = xf86_config->output[i];
                        nv_output2 = output2->driver_private;
                        if (nv_output2->ramdac == 1 && output != output2) {
                                nv_output2->ramdac = -1;
                                nv_output2->ramdac_assigned = FALSE;
                                break;
                        }
                }
                pNv->ramdac_active[1] = FALSE;
                stole_ramdac = TRUE;
        }

        /* TODO: figure out what ramdac 2 is and how it is identified */

        /* At this point we already stole ramdac 0 or 1 if we need it */
        if (!pNv->ramdac_active[0] && (nv_output->valid_ramdac & RAMDAC_0)) {
                ErrorF("Activating ramdac %d\n", 0);
                pNv->ramdac_active[0] = TRUE;
                nv_output->ramdac = 0;
        } else {
                ErrorF("Activating ramdac %d\n", 1);
                pNv->ramdac_active[1] = TRUE;
                nv_output->ramdac = 1;
        }

        if (nv_output->ramdac != -1) {
                nv_output->ramdac_assigned = TRUE;
                nv_clear_ramdac_from_outputs(output, nv_output->ramdac);
        }

        if (stole_ramdac) {
                ErrorF("Resetting the stolen ramdac\n");
                output2->funcs->prepare(output2);
                output2->funcs->mode_set(output2, &(output2->crtc->desiredMode), &(output2->crtc->desiredMode));
        }
}

static void
nv_output_commit(xf86OutputPtr output)
{
        ErrorF("nv_output_commit is called\n");

        output->funcs->dpms(output, DPMSModeOn);
}

static const xf86OutputFuncsRec nv_analog_output_funcs = {
    .dpms = nv_analog_output_dpms,
    .save = nv_output_save,
    .restore = nv_output_restore,
    .mode_valid = nv_output_mode_valid,
    .mode_fixup = nv_output_mode_fixup,
    .mode_set = nv_output_mode_set,
    .detect = nv_analog_output_detect,
    .get_modes = nv_output_get_modes,
    .destroy = nv_output_destroy,
    .prepare = nv_output_prepare,
    .commit = nv_output_commit,
};

static const xf86OutputFuncsRec nv_tmds_output_funcs = {
    .dpms = nv_tmds_output_dpms,
    .save = nv_output_save,
    .restore = nv_output_restore,
    .mode_valid = nv_output_mode_valid,
    .mode_fixup = nv_output_mode_fixup,
    .mode_set = nv_output_mode_set,
    .detect = nv_tmds_output_detect,
    .get_modes = nv_output_get_modes,
    .destroy = nv_output_destroy,
    .prepare = nv_output_prepare,
    .commit = nv_output_commit,
};

static int nv_lvds_output_mode_valid
(xf86OutputPtr output, DisplayModePtr pMode)
{
        NVOutputPrivatePtr nv_output = output->driver_private;

        /* No modes > panel's native res */
        if (pMode->HDisplay > nv_output->fpWidth || pMode->VDisplay > nv_output->fpHeight)
                return MODE_PANEL;

        return nv_output_mode_valid(output, pMode);
}

static xf86OutputStatus
nv_lvds_output_detect(xf86OutputPtr output)
{
        ScrnInfoPtr pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);

        if (pNv->fp_native_mode || nv_ddc_detect(output))
                return XF86OutputStatusConnected;

        return XF86OutputStatusDisconnected;
}

static DisplayModePtr
nv_lvds_output_get_modes(xf86OutputPtr output)
{
        ScrnInfoPtr pScrn = output->scrn;
        NVPtr pNv = NVPTR(pScrn);
        NVOutputPrivatePtr nv_output = output->driver_private;
        DisplayModePtr modes;

        if ((modes = nv_output_get_modes(output)))
                return modes;

        /* it is possible to set up a mode from what we can read from the
         * RAMDAC registers, but if we can't read the BIOS table correctly
         * we might as well give up */
        if (pNv->fp_native_mode == NULL)
                return NULL;

        nv_output->fpWidth = NVOutputReadRAMDAC(output, NV_RAMDAC_FP_HDISP_END) + 1;
        nv_output->fpHeight = NVOutputReadRAMDAC(output, NV_RAMDAC_FP_VDISP_END) + 1;
        nv_output->fpSyncs = NVOutputReadRAMDAC(output, NV_RAMDAC_FP_CONTROL) & 0x30000033;

        if (pNv->fp_native_mode->HDisplay != nv_output->fpWidth ||
                pNv->fp_native_mode->VDisplay != nv_output->fpHeight) {
                xf86DrvMsg(pScrn->scrnIndex, X_INFO,
                        "Panel size mismatch; ignoring RAMDAC\n");
                nv_output->fpWidth = pNv->fp_native_mode->HDisplay;
                nv_output->fpHeight = pNv->fp_native_mode->VDisplay;
        }

        xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Panel size is %u x %u\n",
                nv_output->fpWidth, nv_output->fpHeight);

        nv_output->native_mode = xf86DuplicateMode(pNv->fp_native_mode);

        return xf86DuplicateMode(pNv->fp_native_mode);
}

static const xf86OutputFuncsRec nv_lvds_output_funcs = {
        .dpms = nv_lvds_output_dpms,
        .save = nv_output_save,
        .restore = nv_output_restore,
        .mode_valid = nv_lvds_output_mode_valid,
        .mode_fixup = nv_output_mode_fixup,
        .mode_set = nv_output_mode_set,
        .detect = nv_lvds_output_detect,
        .get_modes = nv_lvds_output_get_modes,
        .destroy = nv_output_destroy,
        .prepare = nv_output_prepare,
        .commit = nv_output_commit,
};

static void nv_add_analog_output(ScrnInfoPtr pScrn, int heads, int order, int i2c_index, Bool dvi_pair)
{
        NVPtr pNv = NVPTR(pScrn);
        xf86OutputPtr       output;
        NVOutputPrivatePtr    nv_output;
        char outputname[20];
        Bool create_output = TRUE;

        /* DVI have an analog connector and a digital one, differentiate between that and a normal vga */
        if (dvi_pair) {
                sprintf(outputname, "DVI-A-%d", pNv->dvi_a_count);
                pNv->dvi_a_count++;
        } else {
                sprintf(outputname, "VGA-%d", pNv->vga_count);
                pNv->vga_count++;
        }

        nv_output = xnfcalloc (sizeof (NVOutputPrivateRec), 1);
        if (!nv_output) {
                return;
        }

        if (pNv->dcb_table.i2c_read[i2c_index] && pNv->pI2CBus[i2c_index] == NULL)
                NV_I2CInit(pScrn, &pNv->pI2CBus[i2c_index], pNv->dcb_table.i2c_read[i2c_index], xstrdup(outputname));

        nv_output->type = OUTPUT_ANALOG;

        /* order:
         * bit0: RAMDAC_0 valid
         * bit1: RAMDAC_1 valid
         * So lowest order has highest priority.
         * Below is guesswork:
         * bit2: All ramdac's valid?
         * FIXME: this probably wrong
         */
        nv_output->valid_ramdac = order;

        if (!create_output) {
                xfree(nv_output);
                return;
        }

        /* Delay creation of output until we actually know we want it */
        output = xf86OutputCreate (pScrn, &nv_analog_output_funcs, outputname);
        if (!output)
                return;

        output->driver_private = nv_output;

        nv_output->pDDCBus = pNv->pI2CBus[i2c_index];

        nv_output->ramdac = -1;

        /* This is only to facilitate proper output routing for dvi */
        /* See sel_clk assignment in nv_crtc.c */
        if (order & RAMDAC_1) {
                nv_output->preferred_crtc = 1;
        } else {
                nv_output->preferred_crtc = 0;
        }

        output->possible_crtcs = heads;
        xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Adding output %s\n", outputname);
}

static void nv_add_digital_output(ScrnInfoPtr pScrn, int heads, int order, int i2c_index, int lvds)
{
        NVPtr pNv = NVPTR(pScrn);
        xf86OutputPtr       output;
        NVOutputPrivatePtr    nv_output;
        char outputname[20];
        Bool create_output = TRUE;

        if (lvds) {
                sprintf(outputname, "LVDS-%d", pNv->lvds_count);
                pNv->lvds_count++;
        } else {
                sprintf(outputname, "DVI-D-%d", pNv->dvi_d_count);
                pNv->dvi_d_count++;
        }

        nv_output = xnfcalloc (sizeof (NVOutputPrivateRec), 1);

        if (!nv_output) {
                return;
        }

        if (pNv->dcb_table.i2c_read[i2c_index] && pNv->pI2CBus[i2c_index] == NULL)
                NV_I2CInit(pScrn, &pNv->pI2CBus[i2c_index], pNv->dcb_table.i2c_read[i2c_index], xstrdup(outputname));

        nv_output->pDDCBus = pNv->pI2CBus[i2c_index];

        /* order:
         * bit0: RAMDAC_0 valid
         * bit1: RAMDAC_1 valid
         * So lowest order has highest priority.
         * Below is guesswork:
         * bit2: All ramdac's valid?
         * FIXME: this probably wrong
         */
        nv_output->valid_ramdac = order;

        if (lvds) {
                nv_output->type = OUTPUT_LVDS;
                /* comment below two lines to test LVDS under RandR12.
                 * If your screen "blooms" or "bleeds" (i.e. has a developing
                 * white / psychedelic pattern) then KILL X IMMEDIATELY
                 * (ctrl+alt+backspace) & if the effect continues reset power */
                ErrorF("Output refused because we don't accept LVDS at the moment.\n");
                create_output = FALSE;
        } else {
                nv_output->type = OUTPUT_TMDS;
        }

        if (!create_output) {
                xfree(nv_output);
                return;
        }

        /* Delay creation of output until we are certain is desirable */
        if (lvds)
                output = xf86OutputCreate (pScrn, &nv_lvds_output_funcs, outputname);
        else
                output = xf86OutputCreate (pScrn, &nv_tmds_output_funcs, outputname);
        if (!output)
                return;

        output->driver_private = nv_output;

        nv_output->ramdac = -1;

        /* This is a theory: */
        /* DVI outputs are in no way bound to ramdac's, but exist purely on a crtc level */
        /* Don't ask why this relation seems valid, ask those weirdos at nvidia */
        if (order & RAMDAC_1) {
                nv_output->preferred_crtc = 1;
        } else {
                nv_output->preferred_crtc = 0;
        }

        output->possible_crtcs = heads;
        xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "Adding output %s\n", outputname);
}

void NvDCBSetupOutputs(ScrnInfoPtr pScrn)
{
        unsigned char type, i2c_index, or, heads, bus;
        NVPtr pNv = NVPTR(pScrn);
        int i, bus_count[0xf];

        memset(bus_count, 0, sizeof(bus_count));
        for (i = 0 ; i < pNv->dcb_table.entries; i++)
                bus_count[pNv->dcb_table.entry[i].bus]++;

        /* we setup the outputs up from the BIOS table */
        for (i = 0 ; i < pNv->dcb_table.entries; i++) {
                type = pNv->dcb_table.entry[i].type;
                i2c_index = pNv->dcb_table.entry[i].i2c_index;
                or = ffs(pNv->dcb_table.entry[i].or);
                heads = pNv->dcb_table.entry[i].head;
                bus = pNv->dcb_table.entry[i].bus;

                if (type > 3) {
                        xf86DrvMsg(pScrn->scrnIndex, X_WARNING, "DCB type %d not known\n", type);
                        continue;
                }

                xf86DrvMsg(pScrn->scrnIndex, X_PROBED, "DCB entry %d: type: %d, i2c_index: %d, head: %d, bus: %d, or: %d\n", i, type, i2c_index, heads, bus, or);

                switch(type) {
                case OUTPUT_ANALOG:
                        nv_add_analog_output(pScrn, heads, or, i2c_index, (bus_count[bus] > 1));
                        break;
                case OUTPUT_TMDS:
                        nv_add_digital_output(pScrn, heads, or, i2c_index, 0);
                        break;
                case OUTPUT_LVDS:
                        nv_add_digital_output(pScrn, heads, or, i2c_index, 1);
                        break;
                default:
                        break;
                }
        }
}

void NvSetupOutputs(ScrnInfoPtr pScrn)
{
        NVPtr pNv = NVPTR(pScrn);

        pNv->Television = FALSE;

        memset(pNv->pI2CBus, 0, sizeof(pNv->pI2CBus));
        NvDCBSetupOutputs(pScrn);
}

/*************************************************************************** \
|*                                                                           *|
|*       Copyright 1993-2003 NVIDIA, Corporation.  All rights reserved.      *|
|*                                                                           *|
|*     NOTICE TO USER:   The source code  is copyrighted under  U.S. and     *|
|*     international laws.  Users and possessors of this source code are     *|
|*     hereby granted a nonexclusive,  royalty-free copyright license to     *|
|*     use this code in individual and commercial software.                  *|
|*                                                                           *|
|*     Any use of this source code must include,  in the user documenta-     *|
|*     tion and  internal comments to the code,  notices to the end user     *|
|*     as follows:                                                           *|
|*                                                                           *|
|*       Copyright 1993-1999 NVIDIA, Corporation.  All rights reserved.      *|
|*                                                                           *|
|*     NVIDIA, CORPORATION MAKES NO REPRESENTATION ABOUT THE SUITABILITY     *|
|*     OF  THIS SOURCE  CODE  FOR ANY PURPOSE.  IT IS  PROVIDED  "AS IS"     *|
|*     WITHOUT EXPRESS OR IMPLIED WARRANTY OF ANY KIND.  NVIDIA, CORPOR-     *|
|*     ATION DISCLAIMS ALL WARRANTIES  WITH REGARD  TO THIS SOURCE CODE,     *|
|*     INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGE-     *|
|*     MENT,  AND FITNESS  FOR A PARTICULAR PURPOSE.   IN NO EVENT SHALL     *|
|*     NVIDIA, CORPORATION  BE LIABLE FOR ANY SPECIAL,  INDIRECT,  INCI-     *|
|*     DENTAL, OR CONSEQUENTIAL DAMAGES,  OR ANY DAMAGES  WHATSOEVER RE-     *|
|*     SULTING FROM LOSS OF USE,  DATA OR PROFITS,  WHETHER IN AN ACTION     *|
|*     OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,  ARISING OUT OF     *|
|*     OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOURCE CODE.     *|
|*                                                                           *|
|*     U.S. Government  End  Users.   This source code  is a "commercial     *|
|*     item,"  as that  term is  defined at  48 C.F.R. 2.101 (OCT 1995),     *|
|*     consisting  of "commercial  computer  software"  and  "commercial     *|
|*     computer  software  documentation,"  as such  terms  are  used in     *|
|*     48 C.F.R. 12.212 (SEPT 1995)  and is provided to the U.S. Govern-     *|
|*     ment only as  a commercial end item.   Consistent with  48 C.F.R.     *|
|*     12.212 and  48 C.F.R. 227.7202-1 through  227.7202-4 (JUNE 1995),     *|
|*     all U.S. Government End Users  acquire the source code  with only     *|
|*     those rights set forth herein.                                        *|
|*                                                                           *|
 \***************************************************************************/