From: Vince Hsu <vinceh@nvidia.com>
Date: Mon, 22 Dec 2014 09:11:37 +0000 (+0800)
Subject: drm/nouveau/clk: allow non-blocking for nouveau_clock_astate()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=f8a8546194d7794c309d2d8114f457f4f921afad;p=openwrt%2Fstaging%2Fblogic.git

drm/nouveau/clk: allow non-blocking for nouveau_clock_astate()

There might be some callers of nouveau_clock_astate(), and they are from
inetrrupt context. So we must ensure that this function can be atomic in
that condition. This patch adds one parameter which is subsequently passed
to nouveau_pstate_calc(). Therefore we can choose whether we want to wait
for the pstate work's completion or not.

Signed-off-by: Vince Hsu <vinceh@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---

diff --git a/drivers/gpu/drm/nouveau/core/include/subdev/clock.h b/drivers/gpu/drm/nouveau/core/include/subdev/clock.h
index 0fd5e4a3a7a2..39ad2d2cee2a 100644
--- a/drivers/gpu/drm/nouveau/core/include/subdev/clock.h
+++ b/drivers/gpu/drm/nouveau/core/include/subdev/clock.h
@@ -159,7 +159,7 @@ int nva3_clock_pll_calc(struct nouveau_clock *, struct nvbios_pll *,
 			int clk, struct nouveau_pll_vals *);
 
 int nouveau_clock_ustate(struct nouveau_clock *, int req, int pwr);
-int nouveau_clock_astate(struct nouveau_clock *, int req, int rel);
+int nouveau_clock_astate(struct nouveau_clock *, int req, int rel, bool wait);
 int nouveau_clock_dstate(struct nouveau_clock *, int req, int rel);
 int nouveau_clock_tstate(struct nouveau_clock *, int req, int rel);
 
diff --git a/drivers/gpu/drm/nouveau/core/subdev/clock/base.c b/drivers/gpu/drm/nouveau/core/subdev/clock/base.c
index e51b72d47129..b1bbe764fa35 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/clock/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/clock/base.c
@@ -430,13 +430,13 @@ nouveau_clock_ustate(struct nouveau_clock *clk, int req, int pwr)
 }
 
 int
-nouveau_clock_astate(struct nouveau_clock *clk, int req, int rel)
+nouveau_clock_astate(struct nouveau_clock *clk, int req, int rel, bool wait)
 {
 	if (!rel) clk->astate  = req;
 	if ( rel) clk->astate += rel;
 	clk->astate = min(clk->astate, clk->state_nr - 1);
 	clk->astate = max(clk->astate, 0);
-	return nouveau_pstate_calc(clk, true);
+	return nouveau_pstate_calc(clk, wait);
 }
 
 int