drm/nouveau/bios/fan: add support for maxwell's fan management table v2

Re-use the therm-exported fan structure with only two minor modifications:
- pwm_freq: u16 -> u32;
- add fan_type (toggle or PWM)

v2:
- Do not memset the table to 0 as it erases the pre-set default values

Signed-off-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile
index f5d7f7c..75aa5e3 100644 (file)
--- a/drivers/gpu/drm/nouveau/Makefile
+++ b/drivers/gpu/drm/nouveau/Makefile
@@ -52,6 +52,7 @@ nouveau-y += core/subdev/bios/vmap.o
 nouveau-y += core/subdev/bios/volt.o
 nouveau-y += core/subdev/bios/xpio.o
 nouveau-y += core/subdev/bios/P0260.o
+nouveau-y += core/subdev/bios/fan.o
 nouveau-y += core/subdev/bus/hwsq.o
 nouveau-y += core/subdev/bus/nv04.o
 nouveau-y += core/subdev/bus/nv31.o

diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/bios/fan.h b/drivers/gpu/drm/nouveau/core/include/subdev/bios/fan.h
new file mode 100644 (file)
index 0000000..119d087
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/bios/fan.h
@@ -0,0 +1,8 @@
+#ifndef __NVBIOS_FAN_H__
+#define __NVBIOS_FAN_H__
+
+#include <subdev/bios/therm.h>
+
+u16 nvbios_fan_parse(struct nouveau_bios *bios, struct nvbios_therm_fan *fan);
+
+#endif

diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/bios/therm.h b/drivers/gpu/drm/nouveau/core/include/subdev/bios/therm.h
index 8dc5051..295d093 100644 (file)
--- a/drivers/gpu/drm/nouveau/core/include/subdev/bios/therm.h
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/bios/therm.h
@@ -23,6 +23,12 @@ struct nvbios_therm_sensor {
        struct nvbios_therm_threshold thrs_shutdown;
 };
 
+enum nvbios_therm_fan_type {
+       NVBIOS_THERM_FAN_UNK = 0,
+       NVBIOS_THERM_FAN_TOGGLE = 1,
+       NVBIOS_THERM_FAN_PWM = 2,
+};
+
 /* no vbios have more than 6 */
 #define NOUVEAU_TEMP_FAN_TRIP_MAX 10
 struct nouveau_therm_trip_point {
@@ -38,7 +44,9 @@ enum nvbios_therm_fan_mode {
 };
 
 struct nvbios_therm_fan {
-       u16 pwm_freq;
+       enum nvbios_therm_fan_type type;
+
+       u32 pwm_freq;
 
        u8 min_duty;
        u8 max_duty;

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/fan.c b/drivers/gpu/drm/nouveau/core/subdev/bios/fan.c
new file mode 100644 (file)
index 0000000..e419892
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/fan.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2014 Martin Peres
+ *
+ * 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: Martin Peres
+ */
+
+#include <subdev/bios.h>
+#include <subdev/bios/bit.h>
+#include <subdev/bios/fan.h>
+
+u16
+nvbios_fan_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
+{
+       struct bit_entry bit_P;
+       u16 fan = 0x0000;
+
+       if (!bit_entry(bios, 'P', &bit_P)) {
+               if (bit_P.version == 2 && bit_P.length >= 0x5a)
+                       fan = nv_ro16(bios, bit_P.offset + 0x58);
+
+               if (fan) {
+                       *ver = nv_ro08(bios, fan + 0);
+                       switch (*ver) {
+                       case 0x10:
+                               *hdr = nv_ro08(bios, fan + 1);
+                               *len = nv_ro08(bios, fan + 2);
+                               *cnt = nv_ro08(bios, fan + 3);
+                               return fan;
+                       default:
+                               break;
+                       }
+               }
+       }
+
+       return 0x0000;
+}
+
+u16
+nvbios_fan_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *hdr,
+                u8 *cnt, u8 *len)
+{
+       u16 data = nvbios_fan_table(bios, ver, hdr, cnt, len);
+       if (data && idx < *cnt)
+               return data + *hdr + (idx * (*len));
+       return 0x0000;
+}
+
+u16
+nvbios_fan_parse(struct nouveau_bios *bios, struct nvbios_therm_fan *fan)
+{
+       u8 ver, hdr, cnt, len;
+
+       u16 data = nvbios_fan_entry(bios, 0, &ver, &hdr, &cnt, &len);
+       if (data) {
+               u8 type = nv_ro08(bios, data + 0x00);
+               switch (type) {
+               case 0:
+                       fan->type = NVBIOS_THERM_FAN_TOGGLE;
+                       break;
+               case 1:
+               case 2:
+                       /* TODO: Understand the difference between the two! */
+                       fan->type = NVBIOS_THERM_FAN_PWM;
+                       break;
+               default:
+                       fan->type = NVBIOS_THERM_FAN_UNK;
+               }
+
+               fan->min_duty = nv_ro08(bios, data + 0x02);
+               fan->max_duty = nv_ro08(bios, data + 0x03);
+
+               fan->pwm_freq = nv_ro32(bios, data + 0x0b) & 0xffffff;
+       }
+       return data;
+}