[Nouveau] [RFC PATCH 29/29] clk: limit clocks on battery

[Karol Herbst]

Signed-off-by: Karol Herbst <karolherbst at gmail.com>
---
 drm/nouveau/include/nvkm/subdev/clk.h |  1 +
 drm/nouveau/nvkm/subdev/clk/base.c    | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/drm/nouveau/include/nvkm/subdev/clk.h b/drm/nouveau/include/nvkm/subdev/clk.h
index 70505c9b..fae45e6e 100644
--- a/drm/nouveau/include/nvkm/subdev/clk.h
+++ b/drm/nouveau/include/nvkm/subdev/clk.h
@@ -120,6 +120,7 @@ struct nvkm_clk {
 	u8  boost_mode;
 	struct nvkm_clk_limit base_limit;
 	struct nvkm_clk_limit boost_limit;
+	struct nvkm_clk_limit batt_limit;
 	u32 max_khz;
 
 	/*XXX: die, these are here *only* to support the completely
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c b/drm/nouveau/nvkm/subdev/clk/base.c
index 994d32b9..0de5b3dc 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -98,6 +98,14 @@ nvkm_cstate_valid(struct nvkm_clk *clk, struct nvkm_cstate *cstate,
 		break;
 	}
 
+	if (!clk->pwrsrc) {
+		u32 blimit = clk->batt_limit.max_khz;
+		if (!limit)
+			limit = blimit;
+		else if (blimit)
+			limit = min(blimit, limit);
+	}
+
 	if (limit) {
 		for (; domain && domain->name != nv_clk_src_max; domain++) {
 			u32 freq;
@@ -309,6 +317,14 @@ nvkm_pstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *start)
 		break;
 	}
 
+	if (!clk->pwrsrc) {
+		u8 blimit = clk->batt_limit.pstate;
+		if (!limit)
+			limit = blimit;
+		else if (blimit)
+			limit = min(blimit, limit);
+	}
+
 	if (!limit)
 		return start;
 
@@ -807,6 +823,8 @@ nvkm_clk_ctor(const struct nvkm_clk_func *func, struct nvkm_device *device,
 			nvkm_clk_fill_limit(&clk->boost_limit, &vpe);
 		if (!nvbios_vpstate_entry(bios, &h, h.base_id, &vpe))
 			nvkm_clk_fill_limit(&clk->base_limit, &vpe);
+		if (!nvbios_vpstate_entry(bios, &h, h.battery_id, &vpe))
+			nvkm_clk_fill_limit(&clk->batt_limit, &vpe);
 	}
 
 	clk->func = func;
-- 
2.14.1