drm/nouveau/volt/gf100-: Add speedo

v5: Squashed speedo related commits.
Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/subdev/volt.h

@@ -25,6 +25,8 @@ struct nvkm_volt {
 	u8 max0_id;
 	u8 max1_id;
 	u8 max2_id;
+
+	int speedo;
 };
 
 int nvkm_volt_map(struct nvkm_volt *volt, u8 id, u8 temperature);

drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c

@@ -195,6 +195,14 @@ nvkm_volt_parse_bios(struct nvkm_bios *bios, struct nvkm_volt *volt)
 	}
 }
 
+static int
+nvkm_volt_speedo_read(struct nvkm_volt *volt)
+{
+	if (volt->func->speedo_read)
+		return volt->func->speedo_read(volt);
+	return -EINVAL;
+}
+
 static int
 nvkm_volt_init(struct nvkm_subdev *subdev)
 {
@@ -209,6 +217,21 @@ nvkm_volt_init(struct nvkm_subdev *subdev)
 	return 0;
 }
 
+static int
+nvkm_volt_oneinit(struct nvkm_subdev *subdev)
+{
+	struct nvkm_volt *volt = nvkm_volt(subdev);
+
+	volt->speedo = nvkm_volt_speedo_read(volt);
+	if (volt->speedo > 0)
+		nvkm_debug(&volt->subdev, "speedo %x\n", volt->speedo);
+
+	if (volt->func->oneinit)
+		return volt->func->oneinit(volt);
+
+	return 0;
+}
+
 static void *
 nvkm_volt_dtor(struct nvkm_subdev *subdev)
 {
@@ -219,6 +242,7 @@ static const struct nvkm_subdev_func
 nvkm_volt = {
 	.dtor = nvkm_volt_dtor,
 	.init = nvkm_volt_init,
+	.oneinit = nvkm_volt_oneinit,
 };
 
 void

drivers/gpu/drm/nouveau/nvkm/subdev/volt/gf100.c

@@ -23,10 +23,36 @@
  */
 #include "priv.h"
 
+#include <subdev/fuse.h>
+
+static int
+gf100_volt_speedo_read(struct nvkm_volt *volt)
+{
+	struct nvkm_device *device = volt->subdev.device;
+	struct nvkm_fuse *fuse = device->fuse;
+
+	if (!fuse)
+		return -EINVAL;
+
+	return nvkm_fuse_read(fuse, 0x1cc);
+}
+
+int
+gf100_volt_oneinit(struct nvkm_volt *volt)
+{
+	struct nvkm_subdev *subdev = &volt->subdev;
+	if (volt->speedo <= 0)
+		nvkm_error(subdev, "couldn't find speedo value, volting not "
+			   "possible\n");
+	return 0;
+}
+
 static const struct nvkm_volt_func
 gf100_volt = {
+	.oneinit = gf100_volt_oneinit,
 	.vid_get = nvkm_voltgpio_get,
 	.vid_set = nvkm_voltgpio_set,
+	.speedo_read = gf100_volt_speedo_read,
 };
 
 int

drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c

@@ -27,6 +27,7 @@
 #include <subdev/gpio.h>
 #include <subdev/bios.h>
 #include <subdev/bios/volt.h>
+#include <subdev/fuse.h>
 
 #define gk104_volt(p) container_of((p), struct gk104_volt, base)
 struct gk104_volt {
@@ -64,13 +65,33 @@ gk104_volt_set(struct nvkm_volt *base, u32 uv)
 	return 0;
 }
 
+static int
+gk104_volt_speedo_read(struct nvkm_volt *volt)
+{
+	struct nvkm_device *device = volt->subdev.device;
+	struct nvkm_fuse *fuse = device->fuse;
+	int ret;
+
+	if (!fuse)
+		return -EINVAL;
+
+	nvkm_wr32(device, 0x122634, 0x0);
+	ret = nvkm_fuse_read(fuse, 0x3a8);
+	nvkm_wr32(device, 0x122634, 0x41);
+	return ret;
+}
+
 static const struct nvkm_volt_func
 gk104_volt_pwm = {
+	.oneinit = gf100_volt_oneinit,
 	.volt_get = gk104_volt_get,
 	.volt_set = gk104_volt_set,
+	.speedo_read = gk104_volt_speedo_read,
 }, gk104_volt_gpio = {
+	.oneinit = gf100_volt_oneinit,
 	.vid_get = nvkm_voltgpio_get,
 	.vid_set = nvkm_voltgpio_set,
+	.speedo_read = gk104_volt_speedo_read,
 };
 
 int

drivers/gpu/drm/nouveau/nvkm/subdev/volt/priv.h

@@ -9,11 +9,13 @@ int nvkm_volt_new_(const struct nvkm_volt_func *, struct nvkm_device *,
 		   int index, struct nvkm_volt **);
 
 struct nvkm_volt_func {
+	int (*oneinit)(struct nvkm_volt *);
 	int (*volt_get)(struct nvkm_volt *);
 	int (*volt_set)(struct nvkm_volt *, u32 uv);
 	int (*vid_get)(struct nvkm_volt *);
 	int (*vid_set)(struct nvkm_volt *, u8 vid);
 	int (*set_id)(struct nvkm_volt *, u8 id, int condition);
+	int (*speedo_read)(struct nvkm_volt *);
 };
 
 int nvkm_voltgpio_init(struct nvkm_volt *);
@@ -23,4 +25,6 @@ int nvkm_voltgpio_set(struct nvkm_volt *, u8);
 int nvkm_voltpwm_init(struct nvkm_volt *volt);
 int nvkm_voltpwm_get(struct nvkm_volt *volt);
 int nvkm_voltpwm_set(struct nvkm_volt *volt, u32 uv);
+
+int gf100_volt_oneinit(struct nvkm_volt *);
 #endif