These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / gpu / drm / nouveau / nvkm / subdev / volt / gk104.c

diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c
new file mode 100644 (file)
index 0000000..b735173
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/volt/gk104.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2015 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 "priv.h"
+
+#include <subdev/volt.h>
+#include <subdev/gpio.h>
+#include <subdev/bios.h>
+#include <subdev/bios/volt.h>
+
+#define gk104_volt(p) container_of((p), struct gk104_volt, base)
+struct gk104_volt {
+       struct nvkm_volt base;
+       struct nvbios_volt bios;
+};
+
+int
+gk104_volt_get(struct nvkm_volt *base)
+{
+       struct nvbios_volt *bios = &gk104_volt(base)->bios;
+       struct nvkm_device *device = base->subdev.device;
+       u32 div, duty;
+
+       div  = nvkm_rd32(device, 0x20340);
+       duty = nvkm_rd32(device, 0x20344);
+
+       return bios->base + bios->pwm_range * duty / div;
+}
+
+int
+gk104_volt_set(struct nvkm_volt *base, u32 uv)
+{
+       struct nvbios_volt *bios = &gk104_volt(base)->bios;
+       struct nvkm_device *device = base->subdev.device;
+       u32 div, duty;
+
+       /* the blob uses this crystal frequency, let's use it too. */
+       div = 27648000 / bios->pwm_freq;
+       duty = (uv - bios->base) * div / bios->pwm_range;
+
+       nvkm_wr32(device, 0x20340, div);
+       nvkm_wr32(device, 0x20344, 0x80000000 | duty);
+
+       return 0;
+}
+
+static const struct nvkm_volt_func
+gk104_volt_pwm = {
+       .volt_get = gk104_volt_get,
+       .volt_set = gk104_volt_set,
+}, gk104_volt_gpio = {
+       .vid_get = nvkm_voltgpio_get,
+       .vid_set = nvkm_voltgpio_set,
+};
+
+int
+gk104_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
+{
+       const struct nvkm_volt_func *volt_func = &gk104_volt_gpio;
+       struct dcb_gpio_func gpio;
+       struct nvbios_volt bios;
+       struct gk104_volt *volt;
+       u8 ver, hdr, cnt, len;
+       const char *mode;
+
+       if (!nvbios_volt_parse(device->bios, &ver, &hdr, &cnt, &len, &bios))
+               return 0;
+
+       if (!nvkm_gpio_find(device->gpio, 0, DCB_GPIO_VID_PWM, 0xff, &gpio) &&
+           bios.type == NVBIOS_VOLT_PWM) {
+               volt_func = &gk104_volt_pwm;
+       }
+
+       if (!(volt = kzalloc(sizeof(*volt), GFP_KERNEL)))
+               return -ENOMEM;
+       nvkm_volt_ctor(volt_func, device, index, &volt->base);
+       *pvolt = &volt->base;
+       volt->bios = bios;
+
+       /* now that we have a subdev, we can show an error if we found through
+        * the voltage table that we were supposed to use the PWN mode but we
+        * did not find the right GPIO for it.
+        */
+       if (bios.type == NVBIOS_VOLT_PWM && volt_func != &gk104_volt_pwm) {
+               nvkm_error(&volt->base.subdev,
+                          "Type mismatch between the voltage table type and "
+                          "the GPIO table. Fallback to GPIO mode.\n");
+       }
+
+       if (volt_func == &gk104_volt_gpio) {
+               nvkm_voltgpio_init(&volt->base);
+               mode = "GPIO";
+       } else
+               mode = "PWM";
+
+       nvkm_debug(&volt->base.subdev, "Using %s mode\n", mode);
+
+       return 0;
+}