summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorMartin Peres <martin.peres@labri.fr>2012-08-30 02:31:59 +0200
committerBen Skeggs <bskeggs@redhat.com>2012-10-03 05:13:13 +0200
commitd46497dce7376e9d3e2e10c59d92e1c3b665b5dd (patch)
tree9494a77fb4b375f724676ea0ee771228c012ddec /drivers
parentdrm/nouveau/therm: use the EXTDEV table to detect i2c monitoring devices (diff)
downloadlinux-d46497dce7376e9d3e2e10c59d92e1c3b665b5dd.tar.xz
linux-d46497dce7376e9d3e2e10c59d92e1c3b665b5dd.zip
drm/nouveau/bios: parse the pwm divisor from the perf table
v2: perf_table now is more in line with the other functions Signed-off-by: Martin Peres <martin.peres@labri.fr> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/nouveau/Makefile1
-rw-r--r--drivers/gpu/drm/nouveau/core/include/subdev/bios/perf.h14
-rw-r--r--drivers/gpu/drm/nouveau/core/subdev/bios/perf.c75
3 files changed, 90 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile
index 6adf1455255c..1b05d114deea 100644
--- a/drivers/gpu/drm/nouveau/Makefile
+++ b/drivers/gpu/drm/nouveau/Makefile
@@ -35,6 +35,7 @@ nouveau-y += core/subdev/bios/gpio.o
nouveau-y += core/subdev/bios/i2c.o
nouveau-y += core/subdev/bios/init.o
nouveau-y += core/subdev/bios/mxm.o
+nouveau-y += core/subdev/bios/perf.o
nouveau-y += core/subdev/bios/pll.o
nouveau-y += core/subdev/bios/therm.o
nouveau-y += core/subdev/clock/nv04.o
diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/bios/perf.h b/drivers/gpu/drm/nouveau/core/include/subdev/bios/perf.h
new file mode 100644
index 000000000000..0b285e99be5a
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/bios/perf.h
@@ -0,0 +1,14 @@
+#ifndef __NVBIOS_PERF_H__
+#define __NVBIOS_PERF_H__
+
+struct nouveau_bios;
+
+struct nvbios_perf_fan {
+ u32 pwm_divisor;
+};
+
+int
+nvbios_perf_fan_parse(struct nouveau_bios *, struct nvbios_perf_fan *);
+
+
+#endif
diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/perf.c b/drivers/gpu/drm/nouveau/core/subdev/bios/perf.c
new file mode 100644
index 000000000000..bcbb056c2887
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/perf.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2012 Nouveau Community
+ *
+ * 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/perf.h>
+
+static u16
+perf_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
+{
+ struct bit_entry bit_P;
+ u16 perf = 0x0000;
+
+ if (!bit_entry(bios, 'P', &bit_P)) {
+ if (bit_P.version <= 2) {
+ perf = nv_ro16(bios, bit_P.offset + 0);
+ if (perf) {
+ *ver = nv_ro08(bios, perf + 0);
+ *hdr = nv_ro08(bios, perf + 1);
+ }
+ } else
+ nv_error(bios, "unknown offset for perf in BIT P %d\n",
+ bit_P.version);
+ }
+
+ if (bios->bmp_offset) {
+ if (nv_ro08(bios, bios->bmp_offset + 6) >= 0x25) {
+ perf = nv_ro16(bios, bios->bmp_offset + 0x94);
+ if (perf) {
+ *hdr = nv_ro08(bios, perf + 0);
+ *ver = nv_ro08(bios, perf + 1);
+ }
+ }
+ }
+
+ return perf;
+}
+
+int
+nvbios_perf_fan_parse(struct nouveau_bios *bios,
+ struct nvbios_perf_fan *fan)
+{
+ u8 ver = 0, hdr = 0, cnt = 0, len = 0;
+ u16 perf = perf_table(bios, &ver, &hdr, &cnt, &len);
+ if (!perf)
+ return -ENODEV;
+
+ if (ver >= 0x20 && ver < 0x40 && hdr > 6)
+ fan->pwm_divisor = nv_ro16(bios, perf + 6);
+ else
+ fan->pwm_divisor = 0;
+
+ return 0;
+}