/******************************************************************************
* C-States
*****************************************************************************/
+static bool
+nvkm_cstate_valid(struct nvkm_clk *clk, struct nvkm_cstate *cstate,
+ u32 max_volt, int temp)
+{
+ struct nvkm_volt *volt = clk->subdev.device->volt;
+ int voltage;
+
+ if (!volt)
+ return true;
+
+ voltage = nvkm_volt_map(volt, cstate->voltage, temp);
+ if (voltage < 0)
+ return false;
+ return voltage <= min(max_volt, volt->max_uv);
+}
+
+static struct nvkm_cstate *
+nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate,
+ struct nvkm_cstate *start)
+{
+ struct nvkm_device *device = clk->subdev.device;
+ struct nvkm_volt *volt = device->volt;
+ struct nvkm_cstate *cstate;
+ int max_volt;
+
+ if (!pstate || !start)
+ return NULL;
+
+ if (!volt)
+ return start;
+
+ max_volt = volt->max_uv;
+ if (volt->max0_id != 0xff)
+ max_volt = min(max_volt,
+ nvkm_volt_map(volt, volt->max0_id, clk->temp));
+ if (volt->max1_id != 0xff)
+ max_volt = min(max_volt,
+ nvkm_volt_map(volt, volt->max1_id, clk->temp));
+ if (volt->max2_id != 0xff)
+ max_volt = min(max_volt,
+ nvkm_volt_map(volt, volt->max2_id, clk->temp));
+
+ for (cstate = start; &cstate->head != &pstate->list;
+ cstate = list_entry(cstate->head.prev, typeof(*cstate), head)) {
+ if (nvkm_cstate_valid(clk, cstate, max_volt, clk->temp))
+ break;
+ }
+
+ return cstate;
+}
+
static struct nvkm_cstate *
nvkm_cstate_get(struct nvkm_clk *clk, struct nvkm_pstate *pstate, int cstatei)
{
if (!list_empty(&pstate->list)) {
cstate = nvkm_cstate_get(clk, pstate, cstatei);
+ cstate = nvkm_cstate_find_best(clk, pstate, cstate);
} else {
cstate = &pstate->base;
}