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 static void
nv04_fb_init(struct nvkm_fb * fb)29 nv04_fb_init(struct nvkm_fb *fb)
30 {
31 	struct nvkm_device *device = fb->subdev.device;
32 
33 	/* This is what the DDX did for NV_ARCH_04, but a mmio-trace shows
34 	 * nvidia reading PFB_CFG_0, then writing back its original value.
35 	 * (which was 0x701114 in this case)
36 	 */
37 	nvkm_wr32(device, NV04_PFB_CFG0, 0x1114);
38 }
39 
40 static const struct nvkm_fb_func
41 nv04_fb = {
42 	.init = nv04_fb_init,
43 	.ram_new = nv04_ram_new,
44 };
45 
46 int
nv04_fb_new(struct nvkm_device * device,enum nvkm_subdev_type type,int inst,struct nvkm_fb ** pfb)47 nv04_fb_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_fb **pfb)
48 {
49 	return nvkm_fb_new_(&nv04_fb, device, type, inst, pfb);
50 }
51