We will access the current cstate at least every second and this saves us
some CPU cycles looking them up every second.
v2: Rewording commit message.
Signed-off-by: Karol Herbst <karolher...@gmail.com>
Reviewed-by: Martin Peres <martin.pe...@free.fr>
---
drm/nouveau/include/nvkm/subdev/clk.h | 4 +++-
drm/nouveau/nvkm/engine/device/ctrl.c | 5 ++++-
drm/nouveau/nvkm/subdev/clk/base.c | 17 ++++++++++++-----
drm/nouveau/nvkm/subdev/pmu/gk20a.c | 18 +++++++-----------
4 files changed, 26 insertions(+), 18 deletions(-)
diff --git a/drm/nouveau/include/nvkm/subdev/clk.h
b/drm/nouveau/include/nvkm/subdev/clk.h
index 1340f5b8..ec537e08 100644
--- a/drm/nouveau/include/nvkm/subdev/clk.h
+++ b/drm/nouveau/include/nvkm/subdev/clk.h
@@ -10,6 +10,8 @@ struct nvkm_pll_vals;
#define NVKM_CLK_CSTATE_BASE -2 /* pstate base */
#define NVKM_CLK_CSTATE_HIGHEST -3 /* highest possible */
+#define NVKM_CLK_PSTATE_DEFAULT -1
+
enum nv_clk_src {
nv_clk_src_crystal,
nv_clk_src_href,
@@ -95,7 +97,7 @@ struct nvkm_clk {
struct nvkm_notify pwrsrc_ntfy;
int pwrsrc;
- int pstate; /* current */
+ struct nvkm_pstate *pstate; /* current */
int ustate_ac; /* user-requested (-1 disabled, -2 perfmon) */
int ustate_dc; /* user-requested (-1 disabled, -2 perfmon) */
int astate; /* perfmon adjustment (base) */
diff --git a/drm/nouveau/nvkm/engine/device/ctrl.c
b/drm/nouveau/nvkm/engine/device/ctrl.c
index b0ece71a..da70626c 100644
--- a/drm/nouveau/nvkm/engine/device/ctrl.c
+++ b/drm/nouveau/nvkm/engine/device/ctrl.c
@@ -52,7 +52,10 @@ nvkm_control_mthd_pstate_info(struct nvkm_control *ctrl,
void *data, u32 size)
args->v0.ustate_ac = clk->ustate_ac;
args->v0.ustate_dc = clk->ustate_dc;
args->v0.pwrsrc = clk->pwrsrc;
- args->v0.pstate = clk->pstate;
+ if (clk->pstate)
+ args->v0.pstate = clk->pstate->pstate;
+ else
+ args->v0.pstate = NVKM_CLK_PSTATE_DEFAULT;
} else {
args->v0.count = 0;
args->v0.ustate_ac = NVIF_CONTROL_PSTATE_INFO_V0_USTATE_DISABLE;
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index 07d530ed..0d4d9fdf 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -271,13 +271,16 @@ nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
struct nvkm_pstate *pstate;
int ret, idx = 0;
+ if (pstatei == NVKM_CLK_PSTATE_DEFAULT)
+ return 0;
+
list_for_each_entry(pstate, &clk->states, head) {
if (idx++ == pstatei)
break;
}
nvkm_debug(subdev, "setting performance state %d\n", pstatei);
- clk->pstate = pstatei;
+ clk->pstate = pstate;
nvkm_pcie_set_link(pci, pstate->pcie_speed, pstate->pcie_width);
@@ -306,8 +309,12 @@ nvkm_clk_update_work(struct work_struct *work)
return;
clk->pwrsrc = power_supply_is_system_supplied();
+ if (clk->pstate)
+ pstate = clk->pstate->pstate;
+ else
+ pstate = NVKM_CLK_PSTATE_DEFAULT;
nvkm_trace(subdev, "P %d PWR %d U(AC) %d U(DC) %d A %d T %d°C\n",
- clk->pstate, clk->pwrsrc, clk->ustate_ac, clk->ustate_dc,
+ pstate, clk->pwrsrc, clk->ustate_ac, clk->ustate_dc,
clk->astate, clk->temp);
pstate = clk->pwrsrc ? clk->ustate_ac : clk->ustate_dc;
@@ -315,11 +322,11 @@ nvkm_clk_update_work(struct work_struct *work)
pstate = (pstate < 0) ? clk->astate : pstate;
pstate = min(pstate, clk->state_nr - 1);
} else {
- pstate = clk->pstate = -1;
+ pstate = NVKM_CLK_PSTATE_DEFAULT;
}
nvkm_trace(subdev, "-> %d\n", pstate);
- if (pstate != clk->pstate) {
+ if (!clk->pstate || pstate != clk->pstate->pstate) {
int ret = nvkm_pstate_prog(clk, pstate);
if (ret) {
nvkm_error(subdev, "error setting pstate %d: %d\n",
@@ -610,7 +617,7 @@ nvkm_clk_init(struct nvkm_subdev *subdev)
return clk->func->init(clk);
clk->astate = clk->state_nr - 1;
- clk->pstate = -1;
+ clk->pstate = NULL;
clk->temp = 90; /* reasonable default value */
nvkm_clk_update(clk, true);
return 0;
diff --git a/drm/nouveau/nvkm/subdev/pmu/gk20a.c
b/drm/nouveau/nvkm/subdev/pmu/gk20a.c
index 978aae3c..3dd550c3 100644
--- a/drm/nouveau/nvkm/subdev/pmu/gk20a.c
+++ b/drm/nouveau/nvkm/subdev/pmu/gk20a.c
@@ -55,24 +55,22 @@ gk20a_pmu_dvfs_target(struct gk20a_pmu *pmu, int *state)
return nvkm_clk_astate(clk, *state, 0, false);
}
-static void
-gk20a_pmu_dvfs_get_cur_state(struct gk20a_pmu *pmu, int *state)
-{
- struct nvkm_clk *clk = pmu->base.subdev.device->clk;
-
- *state = clk->pstate;
-}
-
static int
gk20a_pmu_dvfs_get_target_state(struct gk20a_pmu *pmu,
int *state, int load)
{
struct gk20a_pmu_dvfs_data *data = pmu->data;
struct nvkm_clk *clk = pmu->base.subdev.device->clk;
+ struct nvkm_pstate *pstate = clk->pstate;
int cur_level, level;
+ if (!pstate) {
+ *state = 0;
+ return 1;
+ }
+
/* For GK20A, the performance level is directly mapped to pstate */
- level = cur_level = clk->pstate;
+ level = cur_level = clk->pstate->pstate;
if (load > data->p_load_max) {
level = min(clk->state_nr - 1, level + (clk->state_nr / 3));
@@ -142,8 +140,6 @@ gk20a_pmu_dvfs_work(struct nvkm_alarm *alarm)
nvkm_trace(subdev, "utilization = %d %%, avg_load = %d %%\n",
utilization, data->avg_load);
- gk20a_pmu_dvfs_get_cur_state(pmu, &state);
-
if (gk20a_pmu_dvfs_get_target_state(pmu, &state, data->avg_load)) {
nvkm_trace(subdev, "set new state to %d\n", state);
gk20a_pmu_dvfs_target(pmu, &state);
--
2.13.2
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