drivers/gpu/drm/nouveau/nvkm/subdev/fb/nv04.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  */
  24 #include "priv.h"
  25 #include "ram.h"
  26 #include "regsnv04.h"
  27
  28 bool
  29 nv04_fb_memtype_valid(struct nvkm_fb *fb, u32 tile_flags)
  30 {
  31         if (!(tile_flags & 0xff00))
  32                 return true;
  33         return false;
  34 }
  35
  36 static void
  37 nv04_fb_init(struct nvkm_fb *fb)
  38 {
  39         struct nvkm_device *device = fb->subdev.device;
  40
  41         /* This is what the DDX did for NV_ARCH_04, but a mmio-trace shows
  42          * nvidia reading PFB_CFG_0, then writing back its original value.
  43          * (which was 0x701114 in this case)
  44          */
  45         nvkm_wr32(device, NV04_PFB_CFG0, 0x1114);
  46 }
  47
  48 static const struct nvkm_fb_func
  49 nv04_fb = {
  50         .init = nv04_fb_init,
  51         .ram_new = nv04_ram_new,
  52         .memtype_valid = nv04_fb_memtype_valid,
  53 };
  54
  55 int
  56 nv04_fb_new(struct nvkm_device *device, int index, struct nvkm_fb **pfb)
  57 {
  58         return nvkm_fb_new_(&nv04_fb, device, index, pfb);
  59 }