cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/engine/disp/rootgf119.c

/*
 * Copyright 2012 Red Hat Inc.
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
 *
 * Authors: Ben Skeggs
 */
#include "rootnv50.h"
#include "dmacnv50.h"

#include <core/client.h>
#include <core/ramht.h>
#include <subdev/timer.h>

#include <nvif/class.h>
#include <nvif/cl5070.h>
#include <nvif/unpack.h>


int gf119_disp_root_scanoutpos(NV50_DISP_MTHD_V0) { struct nvkm_device *device = disp->base.engine.subdev.device; const u32 total = nvkm_rd32(device, 0x640414 + (head * 0x300)); const u32 blanke = nvkm_rd32(device, 0x64041c + (head * 0x300)); const u32 blanks = nvkm_rd32(device, 0x640420 + (head * 0x300)); union { struct nv50_disp_scanoutpos_v0 v0; } *args = data; int ret = -ENOSYS; nvif_ioctl(object, "disp scanoutpos size %d\n", size); if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) { nvif_ioctl(object, "disp scanoutpos vers %d\n", args->v0.version); args->v0.vblanke = (blanke & 0xffff0000) >> 16; args->v0.hblanke = (blanke & 0x0000ffff); args->v0.vblanks = (blanks & 0xffff0000) >> 16; args->v0.hblanks = (blanks & 0x0000ffff); args->v0.vtotal = ( total & 0xffff0000) >> 16; args->v0.htotal = ( total & 0x0000ffff); args->v0.time[0] = ktime_to_ns(ktime_get()); args->v0.vline = /* vline read locks hline */ nvkm_rd32(device, 0x616340 + (head * 0x800)) & 0xffff; args->v0.time[1] = ktime_to_ns(ktime_get()); args->v0.hline = nvkm_rd32(device, 0x616344 + (head * 0x800)) & 0xffff; } else return ret; return 0; }

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void gf119_disp_root_fini(struct nv50_disp_root *root) { struct nvkm_device *device = root->disp->base.engine.subdev.device; /* disable all interrupts */ nvkm_wr32(device, 0x6100b0, 0x00000000); }

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int gf119_disp_root_init(struct nv50_disp_root *root) { struct nv50_disp *disp = root->disp; struct nvkm_device *device = disp->base.engine.subdev.device; u32 tmp; int i; /* The below segments of code copying values from one register to * another appear to inform EVO of the display capabilities or * something similar. */ /* ... CRTC caps */ for (i = 0; i < disp->base.head.nr; i++) { tmp = nvkm_rd32(device, 0x616104 + (i * 0x800)); nvkm_wr32(device, 0x6101b4 + (i * 0x800), tmp); tmp = nvkm_rd32(device, 0x616108 + (i * 0x800)); nvkm_wr32(device, 0x6101b8 + (i * 0x800), tmp); tmp = nvkm_rd32(device, 0x61610c + (i * 0x800)); nvkm_wr32(device, 0x6101bc + (i * 0x800), tmp); } /* ... DAC caps */ for (i = 0; i < disp->func->dac.nr; i++) { tmp = nvkm_rd32(device, 0x61a000 + (i * 0x800)); nvkm_wr32(device, 0x6101c0 + (i * 0x800), tmp); } /* ... SOR caps */ for (i = 0; i < disp->func->sor.nr; i++) { tmp = nvkm_rd32(device, 0x61c000 + (i * 0x800)); nvkm_wr32(device, 0x6301c4 + (i * 0x800), tmp); } /* steal display away from vbios, or something like that */ if (nvkm_rd32(device, 0x6100ac) & 0x00000100) { nvkm_wr32(device, 0x6100ac, 0x00000100); nvkm_mask(device, 0x6194e8, 0x00000001, 0x00000000); if (nvkm_msec(device, 2000, if (!(nvkm_rd32(device, 0x6194e8) & 0x00000002)) break; ) < 0) return -EBUSY; } /* point at display engine memory area (hash table, objects) */ nvkm_wr32(device, 0x610010, (root->instmem->addr >> 8) | 9); /* enable supervisor interrupts, disable everything else */ nvkm_wr32(device, 0x610090, 0x00000000); nvkm_wr32(device, 0x6100a0, 0x00000000); nvkm_wr32(device, 0x6100b0, 0x00000307); /* disable underflow reporting, preventing an intermittent issue * on some gk104 boards where the production vbios left this * setting enabled by default. * * ftp://download.nvidia.com/open-gpu-doc/gk104-disable-underflow-reporting/1/gk104-disable-underflow-reporting.txt */ for (i = 0; i < disp->base.head.nr; i++) nvkm_mask(device, 0x616308 + (i * 0x800), 0x00000111, 0x00000010); return 0; }

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Ben Skeggs400100.00%3100.00%
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static const struct nv50_disp_root_func gf119_disp_root = { .init = gf119_disp_root_init, .fini = gf119_disp_root_fini, .dmac = { &gf119_disp_core_oclass, &gf119_disp_base_oclass, &gf119_disp_ovly_oclass, }, .pioc = { &gf119_disp_oimm_oclass, &gf119_disp_curs_oclass, }, };
static int gf119_disp_root_new(struct nvkm_disp *disp, const struct nvkm_oclass *oclass, void *data, u32 size, struct nvkm_object **pobject) { return nv50_disp_root_new_(&gf119_disp_root, disp, oclass, data, size, pobject); }

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Ben Skeggs47100.00%2100.00%
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const struct nvkm_disp_oclass gf119_disp_root_oclass = { .base.oclass = GF110_DISP, .base.minver = -1, .base.maxver = -1, .ctor = gf119_disp_root_new, };

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