we should never allow to select a cstate which current voltage (depending on
the temperature) is higher than
1. the max volt entries in the voltage map table
2. what tha gpu actually can volt to.
this resolves all remaining volting errors on fermi and newer.
v3: use find_best for all cstates before actually trying
add nvkm_cstate_get function to get cstate by index
Signed-off-by: Karol Herbst <[email protected]>
---
drm/nouveau/nvkm/subdev/clk/base.c | 83 +++++++++++++++++++++++++++++++++-----
1 file changed, 74 insertions(+), 9 deletions(-)
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index 29478c7..0fda7b1 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -74,6 +74,78 @@ nvkm_clk_adjust(struct nvkm_clk *clk, bool adjust,
/******************************************************************************
* 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) &&
+ voltage >= volt->min_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_therm *therm = device->therm;
+ struct nvkm_volt *volt = device->volt;
+ struct nvkm_cstate *cstate;
+ int max_volt, temp = 0;
+
+ if (!pstate || !start)
+ return NULL;
+
+ if (!volt)
+ return list_entry(pstate->list.prev, typeof(*cstate), head);
+
+ if (therm) {
+ /* ignore error code */
+ temp = max(0, nvkm_therm_temp_get(therm));
+ }
+
+ max_volt = volt->max_uv;
+ if (volt->max0_id != 0xff)
+ max_volt = min(max_volt,
+ nvkm_volt_map(volt, volt->max0_id, temp));
+ if (volt->max1_id != 0xff)
+ max_volt = min(max_volt,
+ nvkm_volt_map(volt, volt->max1_id, temp));
+ if (volt->max2_id != 0xff)
+ max_volt = min(max_volt,
+ nvkm_volt_map(volt, volt->max2_id, 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, temp))
+ break;
+ }
+
+ return cstate;
+}
+
+static struct nvkm_cstate *
+nvkm_cstate_get(struct nvkm_clk *clk, struct nvkm_pstate *pstate, int cstatei)
+{
+ struct nvkm_cstate *cstate;
+ if (cstatei == -1)
+ return list_entry(pstate->list.prev, typeof(*cstate), head);
+ else {
+ list_for_each_entry(cstate, &pstate->list, head) {
+ if (cstate->cstate == cstatei)
+ return cstate;
+ }
+ }
+ return NULL;
+}
+
static int
nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate *pstate, int cstatei)
{
@@ -85,15 +157,8 @@ nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate
*pstate, int cstatei)
int ret;
if (!list_empty(&pstate->list)) {
- if (cstatei == -1)
- cstate = list_entry(pstate->list.prev, typeof(*cstate),
- head);
- else {
- list_for_each_entry(cstate, &pstate->list, head) {
- if (cstate->cstate == cstatei)
- break;
- }
- }
+ cstate = nvkm_cstate_get(clk, pstate, cstatei);
+ cstate = nvkm_cstate_find_best(clk, pstate, cstate);
} else {
cstate = &pstate->base;
}
--
2.8.1
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