cregit-Linux how code gets into the kernel

Release 4.18 drivers/gpu/drm/nouveau/nvkm/engine/disp/cursgv100.c

/*
 * Copyright 2018 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.
 */
#include "channv50.h"

#include <subdev/timer.h>


static int gv100_disp_curs_idle(struct nv50_disp_chan *chan) { struct nvkm_device *device = chan->disp->base.engine.subdev.device; const u32 soff = (chan->chid.ctrl - 1) * 0x04; nvkm_msec(device, 2000, u32 stat = nvkm_rd32(device, 0x610664 + soff); if ((stat & 0x00070000) == 0x00040000) return 0; ); return -EBUSY; }

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static void gv100_disp_curs_intr(struct nv50_disp_chan *chan, bool en) { struct nvkm_device *device = chan->disp->base.engine.subdev.device; const u32 mask = 0x00010000 << chan->head; const u32 data = en ? mask : 0; nvkm_mask(device, 0x611dac, mask, data); }

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static void gv100_disp_curs_fini(struct nv50_disp_chan *chan) { struct nvkm_device *device = chan->disp->base.engine.subdev.device; const u32 hoff = chan->chid.ctrl * 4; nvkm_mask(device, 0x6104e0 + hoff, 0x00000010, 0x00000010); gv100_disp_curs_idle(chan); nvkm_mask(device, 0x6104e0 + hoff, 0x00000001, 0x00000000); }

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static int gv100_disp_curs_init(struct nv50_disp_chan *chan) { struct nvkm_subdev *subdev = &chan->disp->base.engine.subdev; struct nvkm_device *device = subdev->device; nvkm_wr32(device, 0x6104e0 + chan->chid.ctrl * 4, 0x00000001); return gv100_disp_curs_idle(chan); }

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static const struct nv50_disp_chan_func gv100_disp_curs = { .init = gv100_disp_curs_init, .fini = gv100_disp_curs_fini, .intr = gv100_disp_curs_intr, .user = gv100_disp_chan_user, };
int gv100_disp_curs_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nv50_disp *disp, struct nvkm_object **pobject) { return nv50_disp_curs_new_(&gv100_disp_curs, disp, 73, 73, oclass, argv, argc, pobject); }

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