[Nouveau] [PATCH v4 15/37] clk: allow boosting only when NvBoost is set

[Karol Herbst]

0: base clock from the vbios is max clock
1: boost only to boost clock from the vbios (default)
2: boost to max clock available

v2: moved into nvkm_cstate_valid
v4: check the existence of the clocks before limiting

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Reviewed-by: Martin Peres <martin.peres at free.fr>
---
 drm/nouveau/include/nvkm/subdev/clk.h |  9 ++++++++-
 drm/nouveau/nvkm/subdev/clk/base.c    | 33 ++++++++++++++++++++++++++++++++-
 drm/nouveau/nvkm/subdev/clk/gf100.c   |  2 +-
 drm/nouveau/nvkm/subdev/clk/gk104.c   |  2 +-
 4 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/drm/nouveau/include/nvkm/subdev/clk.h b/drm/nouveau/include/nvkm/subdev/clk.h
index 6226f0d..99ee05c 100644
--- a/drm/nouveau/include/nvkm/subdev/clk.h
+++ b/drm/nouveau/include/nvkm/subdev/clk.h
@@ -68,7 +68,8 @@ struct nvkm_pstate {
 struct nvkm_domain {
 	enum nv_clk_src name;
 	u8 bios; /* 0xff for none */
-#define NVKM_CLK_DOM_FLAG_CORE 0x01
+#define NVKM_CLK_DOM_FLAG_CORE    0x01
+#define NVKM_CLK_DOM_FLAG_BASECLK 0x02
 	u8 flags;
 	const char *mname;
 	int mdiv;
@@ -98,6 +99,12 @@ struct nvkm_clk {
 	int dstate; /* display adjustment (min+) */
 
 	bool allow_reclock;
+#define NVKM_CLK_BOOST_NONE 0x0
+#define NVKM_CLK_BOOST_AVG  0x1
+#define NVKM_CLK_BOOST_FULL 0x2
+	u8  boost_mode;
+	u32 base_khz;
+	u32 boost_khz;
 
 	/*XXX: die, these are here *only* to support the completely
 	 *     bat-shit insane what-was-nouveau_hw.c code
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c b/drm/nouveau/nvkm/subdev/clk/base.c
index 21f6369..a9a3666 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -24,6 +24,7 @@
 #include "priv.h"
 
 #include <subdev/bios.h>
+#include <subdev/bios/baseclock.h>
 #include <subdev/bios/boost.h>
 #include <subdev/bios/cstep.h>
 #include <subdev/bios/perf.h>
@@ -77,9 +78,25 @@ nvkm_clk_adjust(struct nvkm_clk *clk, bool adjust,
 static bool
 nvkm_cstate_valid(struct nvkm_clk *clk, struct nvkm_cstate *cstate, u32 max_volt, int temp)
 {
+	const struct nvkm_domain *domain = clk->domains;
 	struct nvkm_volt *volt = clk->subdev.device->volt;
 	int voltage;
 
+	while (domain && domain->name != nv_clk_src_max) {
+		if (domain->flags & NVKM_CLK_DOM_FLAG_BASECLK) {
+			u32 freq = cstate->domain[domain->name];
+			switch (clk->boost_mode) {
+			case NVKM_CLK_BOOST_NONE:
+				if (clk->base_khz && freq > clk->base_khz)
+					return false;
+			case NVKM_CLK_BOOST_AVG:
+				if (clk->boost_khz && freq > clk->boost_khz)
+					return false;
+			}
+		}
+		domain++;
+	}
+
 	if (!volt)
 		return true;
 
@@ -641,10 +658,24 @@ int
 nvkm_clk_ctor(const struct nvkm_clk_func *func, struct nvkm_device *device,
 	      int index, bool allow_reclock, struct nvkm_clk *clk)
 {
+	struct nvkm_subdev *subdev = &clk->subdev;
+	struct nvkm_bios *bios = device->bios;
 	int ret, idx, arglen;
 	const char *mode;
+	struct nvbios_baseclk_header h;
+
+	nvkm_subdev_ctor(&nvkm_clk, device, index, subdev);
+
+	clk->boost_mode = nvkm_longopt(device->cfgopt, "NvBoost",
+				       NVKM_CLK_BOOST_AVG);
+	if (bios && !nvbios_baseclock_parse(bios, &h)) {
+		struct nvbios_baseclk_entry base, boost;
+		if (!nvbios_baseclock_entry(bios, &h, h.boost_id, &boost))
+			clk->boost_khz = boost.clock_mhz * 1000;
+		if (!nvbios_baseclock_entry(bios, &h, h.base_id, &base))
+			clk->base_khz = base.clock_mhz * 1000;
+	}
 
-	nvkm_subdev_ctor(&nvkm_clk, device, index, &clk->subdev);
 	clk->func = func;
 	INIT_LIST_HEAD(&clk->states);
 	clk->domains = func->domains;
diff --git a/drm/nouveau/nvkm/subdev/clk/gf100.c b/drm/nouveau/nvkm/subdev/clk/gf100.c
index 78c449b..71b7c9f 100644
--- a/drm/nouveau/nvkm/subdev/clk/gf100.c
+++ b/drm/nouveau/nvkm/subdev/clk/gf100.c
@@ -443,7 +443,7 @@ gf100_clk = {
 		{ nv_clk_src_hubk06 , 0x00 },
 		{ nv_clk_src_hubk01 , 0x01 },
 		{ nv_clk_src_copy   , 0x02 },
-		{ nv_clk_src_gpc    , 0x03, 0, "core", 2000 },
+		{ nv_clk_src_gpc    , 0x03, NVKM_CLK_DOM_FLAG_BASECLK, "core", 2000 },
 		{ nv_clk_src_rop    , 0x04 },
 		{ nv_clk_src_mem    , 0x05, 0, "memory", 1000 },
 		{ nv_clk_src_vdec   , 0x06 },
diff --git a/drm/nouveau/nvkm/subdev/clk/gk104.c b/drm/nouveau/nvkm/subdev/clk/gk104.c
index 975c401..639234f 100644
--- a/drm/nouveau/nvkm/subdev/clk/gk104.c
+++ b/drm/nouveau/nvkm/subdev/clk/gk104.c
@@ -485,7 +485,7 @@ gk104_clk = {
 	.domains = {
 		{ nv_clk_src_crystal, 0xff },
 		{ nv_clk_src_href   , 0xff },
-		{ nv_clk_src_gpc    , 0x00, NVKM_CLK_DOM_FLAG_CORE, "core", 2000 },
+		{ nv_clk_src_gpc    , 0x00, NVKM_CLK_DOM_FLAG_CORE | NVKM_CLK_DOM_FLAG_BASECLK, "core", 2000 },
 		{ nv_clk_src_hubk07 , 0x01, NVKM_CLK_DOM_FLAG_CORE },
 		{ nv_clk_src_rop    , 0x02, NVKM_CLK_DOM_FLAG_CORE },
 		{ nv_clk_src_mem    , 0x03, 0, "memory", 500 },
-- 
2.8.1