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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - drivers/gpu/drm/nouveau/nouveau_volt.c
2 * Copyright 2010 Red Hat Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
27 #include "nouveau_drv.h"
28 #include "nouveau_pm.h"
29 #include "nouveau_gpio.h"
31 static const enum dcb_gpio_tag vidtag
[] = { 0x04, 0x05, 0x06, 0x1a, 0x73 };
32 static int nr_vidtag
= sizeof(vidtag
) / sizeof(vidtag
[0]);
35 nouveau_voltage_gpio_get(struct drm_device
*dev
)
37 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
38 struct nouveau_pm_voltage
*volt
= &dev_priv
->engine
.pm
.voltage
;
42 for (i
= 0; i
< nr_vidtag
; i
++) {
43 if (!(volt
->vid_mask
& (1 << i
)))
46 vid
|= nouveau_gpio_func_get(dev
, vidtag
[i
]) << i
;
49 return nouveau_volt_lvl_lookup(dev
, vid
);
53 nouveau_voltage_gpio_set(struct drm_device
*dev
, int voltage
)
55 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
56 struct nouveau_pm_voltage
*volt
= &dev_priv
->engine
.pm
.voltage
;
59 vid
= nouveau_volt_vid_lookup(dev
, voltage
);
63 for (i
= 0; i
< nr_vidtag
; i
++) {
64 if (!(volt
->vid_mask
& (1 << i
)))
67 nouveau_gpio_func_set(dev
, vidtag
[i
], !!(vid
& (1 << i
)));
74 nouveau_volt_vid_lookup(struct drm_device
*dev
, int voltage
)
76 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
77 struct nouveau_pm_voltage
*volt
= &dev_priv
->engine
.pm
.voltage
;
80 for (i
= 0; i
< volt
->nr_level
; i
++) {
81 if (volt
->level
[i
].voltage
== voltage
)
82 return volt
->level
[i
].vid
;
89 nouveau_volt_lvl_lookup(struct drm_device
*dev
, int vid
)
91 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
92 struct nouveau_pm_voltage
*volt
= &dev_priv
->engine
.pm
.voltage
;
95 for (i
= 0; i
< volt
->nr_level
; i
++) {
96 if (volt
->level
[i
].vid
== vid
)
97 return volt
->level
[i
].voltage
;
104 nouveau_volt_init(struct drm_device
*dev
)
106 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
107 struct nouveau_pm_engine
*pm
= &dev_priv
->engine
.pm
;
108 struct nouveau_pm_voltage
*voltage
= &pm
->voltage
;
109 struct nvbios
*bios
= &dev_priv
->vbios
;
111 u8
*volt
= NULL
, *entry
;
112 int i
, headerlen
, recordlen
, entries
, vidmask
, vidshift
;
114 if (bios
->type
== NVBIOS_BIT
) {
115 if (bit_table(dev
, 'P', &P
))
119 volt
= ROMPTR(dev
, P
.data
[16]);
122 volt
= ROMPTR(dev
, P
.data
[12]);
124 NV_WARN(dev
, "unknown volt for BIT P %d\n", P
.version
);
127 if (bios
->data
[bios
->offset
+ 6] < 0x27) {
128 NV_DEBUG(dev
, "BMP version too old for voltage\n");
132 volt
= ROMPTR(dev
, bios
->data
[bios
->offset
+ 0x98]);
136 NV_DEBUG(dev
, "voltage table pointer invalid\n");
154 vidshift
= 0; /* could be vidshift like 0x30? */
162 /* no longer certain what volt[5] is, if it's related to
163 * the vid shift then it's definitely not a function of
164 * how many bits are set.
166 * after looking at a number of nva3+ vbios images, they
167 * all seem likely to have a static shift of 2.. lets
168 * go with that for now until proven otherwise.
175 entries
= volt
[3]; /* not a clue what the entries are for.. */
176 vidmask
= volt
[11]; /* guess.. */
180 NV_WARN(dev
, "voltage table 0x%02x unknown\n", volt
[0]);
184 /* validate vid mask */
185 voltage
->vid_mask
= vidmask
;
186 if (!voltage
->vid_mask
)
192 NV_DEBUG(dev
, "vid bit %d unknown\n", i
);
196 if (!nouveau_gpio_func_valid(dev
, vidtag
[i
])) {
197 NV_DEBUG(dev
, "vid bit %d has no gpio tag\n", i
);
205 /* parse vbios entries into common format */
206 voltage
->version
= volt
[0];
207 if (voltage
->version
< 0x40) {
208 voltage
->nr_level
= entries
;
210 kcalloc(entries
, sizeof(*voltage
->level
), GFP_KERNEL
);
214 entry
= volt
+ headerlen
;
215 for (i
= 0; i
< entries
; i
++, entry
+= recordlen
) {
216 voltage
->level
[i
].voltage
= entry
[0] * 10000;
217 voltage
->level
[i
].vid
= entry
[1] >> vidshift
;
220 u32 volt_uv
= ROM32(volt
[4]);
221 s16 step_uv
= ROM16(volt
[8]);
224 voltage
->nr_level
= voltage
->vid_mask
+ 1;
225 voltage
->level
= kcalloc(voltage
->nr_level
,
226 sizeof(*voltage
->level
), GFP_KERNEL
);
230 for (vid
= 0; vid
<= voltage
->vid_mask
; vid
++) {
231 voltage
->level
[vid
].voltage
= volt_uv
;
232 voltage
->level
[vid
].vid
= vid
;
237 voltage
->supported
= true;
241 nouveau_volt_fini(struct drm_device
*dev
)
243 struct drm_nouveau_private
*dev_priv
= dev
->dev_private
;
244 struct nouveau_pm_voltage
*volt
= &dev_priv
->engine
.pm
.voltage
;