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Date: Wed, 29 May 2013 13:26:08 +0300
From: Arto Merilainen <amerilainen@...dia.com>
To: <thierry.reding@...il.com>, <airlied@...ux.ie>,
<linux-tegra@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>
CC: <tbergstrom@...dia.com>, <linux-kernel@...r.kernel.org>,
Arto Merilainen <amerilainen@...dia.com>
Subject: [PATCHv2 7/7] gpu: host1x: Rework CPU syncpoint increment
This patch merges host1x_syncpt_cpu_incr to host1x_syncpt_incr() as
they are in practise doing the same thing. host1x_syncpt_incr() is
also modified to return error codes. User space interface is modified
accordingly to pass return values.
Signed-off-by: Arto Merilainen <amerilainen@...dia.com>
---
drivers/gpu/host1x/dev.h | 8 ++++----
drivers/gpu/host1x/drm/drm.c | 3 +--
drivers/gpu/host1x/hw/cdma_hw.c | 2 +-
drivers/gpu/host1x/hw/syncpt_hw.c | 12 +++++-------
drivers/gpu/host1x/syncpt.c | 15 ++-------------
drivers/gpu/host1x/syncpt.h | 7 ++-----
6 files changed, 15 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h
index a1607d6..790ddf1 100644
--- a/drivers/gpu/host1x/dev.h
+++ b/drivers/gpu/host1x/dev.h
@@ -73,7 +73,7 @@ struct host1x_syncpt_ops {
void (*restore_wait_base)(struct host1x_syncpt *syncpt);
void (*load_wait_base)(struct host1x_syncpt *syncpt);
u32 (*load)(struct host1x_syncpt *syncpt);
- void (*cpu_incr)(struct host1x_syncpt *syncpt);
+ int (*cpu_incr)(struct host1x_syncpt *syncpt);
int (*patch_wait)(struct host1x_syncpt *syncpt, void *patch_addr);
};
@@ -157,10 +157,10 @@ static inline u32 host1x_hw_syncpt_load(struct host1x *host,
return host->syncpt_op->load(sp);
}
-static inline void host1x_hw_syncpt_cpu_incr(struct host1x *host,
- struct host1x_syncpt *sp)
+static inline int host1x_hw_syncpt_cpu_incr(struct host1x *host,
+ struct host1x_syncpt *sp)
{
- host->syncpt_op->cpu_incr(sp);
+ return host->syncpt_op->cpu_incr(sp);
}
static inline int host1x_hw_syncpt_patch_wait(struct host1x *host,
diff --git a/drivers/gpu/host1x/drm/drm.c b/drivers/gpu/host1x/drm/drm.c
index 2b561c9..1dfd454 100644
--- a/drivers/gpu/host1x/drm/drm.c
+++ b/drivers/gpu/host1x/drm/drm.c
@@ -378,8 +378,7 @@ static int tegra_syncpt_incr(struct drm_device *drm, void *data,
if (!sp)
return -EINVAL;
- host1x_syncpt_incr(sp);
- return 0;
+ return host1x_syncpt_incr(sp);
}
static int tegra_syncpt_wait(struct drm_device *drm, void *data,
diff --git a/drivers/gpu/host1x/hw/cdma_hw.c b/drivers/gpu/host1x/hw/cdma_hw.c
index 590b69d..2ee4ad5 100644
--- a/drivers/gpu/host1x/hw/cdma_hw.c
+++ b/drivers/gpu/host1x/hw/cdma_hw.c
@@ -44,7 +44,7 @@ static void cdma_timeout_cpu_incr(struct host1x_cdma *cdma, u32 getptr,
u32 i;
for (i = 0; i < syncpt_incrs; i++)
- host1x_syncpt_cpu_incr(cdma->timeout.syncpt);
+ host1x_syncpt_incr(cdma->timeout.syncpt);
/* after CPU incr, ensure shadow is up to date */
host1x_syncpt_load(cdma->timeout.syncpt);
diff --git a/drivers/gpu/host1x/hw/syncpt_hw.c b/drivers/gpu/host1x/hw/syncpt_hw.c
index 6117499..0cf6095 100644
--- a/drivers/gpu/host1x/hw/syncpt_hw.c
+++ b/drivers/gpu/host1x/hw/syncpt_hw.c
@@ -77,21 +77,19 @@ static u32 syncpt_load(struct host1x_syncpt *sp)
* Write a cpu syncpoint increment to the hardware, without touching
* the cache.
*/
-static void syncpt_cpu_incr(struct host1x_syncpt *sp)
+static int syncpt_cpu_incr(struct host1x_syncpt *sp)
{
struct host1x *host = sp->host;
u32 reg_offset = sp->id / 32;
if (!host1x_syncpt_client_managed(sp) &&
- host1x_syncpt_idle(sp)) {
- dev_err(host->dev, "Trying to increment syncpoint id %d beyond max\n",
- sp->id);
- host1x_debug_dump(sp->host);
- return;
- }
+ host1x_syncpt_idle(sp))
+ return -EINVAL;
host1x_sync_writel(host, BIT_MASK(sp->id),
HOST1X_SYNC_SYNCPT_CPU_INCR(reg_offset));
wmb();
+
+ return 0;
}
/* remove a wait pointed to by patch_addr */
diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c
index 27201b5..409745b 100644
--- a/drivers/gpu/host1x/syncpt.c
+++ b/drivers/gpu/host1x/syncpt.c
@@ -129,22 +129,11 @@ u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp)
}
/*
- * Write a cpu syncpoint increment to the hardware, without touching
- * the cache. Caller is responsible for host being powered.
- */
-void host1x_syncpt_cpu_incr(struct host1x_syncpt *sp)
-{
- host1x_hw_syncpt_cpu_incr(sp->host, sp);
-}
-
-/*
* Increment syncpoint value from cpu, updating cache
*/
-void host1x_syncpt_incr(struct host1x_syncpt *sp)
+int host1x_syncpt_incr(struct host1x_syncpt *sp)
{
- if (host1x_syncpt_client_managed(sp))
- host1x_syncpt_incr_max(sp, 1);
- host1x_syncpt_cpu_incr(sp);
+ return host1x_hw_syncpt_cpu_incr(sp->host, sp);
}
/*
diff --git a/drivers/gpu/host1x/syncpt.h b/drivers/gpu/host1x/syncpt.h
index d00e758..267c0b9 100644
--- a/drivers/gpu/host1x/syncpt.h
+++ b/drivers/gpu/host1x/syncpt.h
@@ -115,9 +115,6 @@ static inline bool host1x_syncpt_idle(struct host1x_syncpt *sp)
/* Return pointer to struct denoting sync point id. */
struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, u32 id);
-/* Request incrementing a sync point. */
-void host1x_syncpt_cpu_incr(struct host1x_syncpt *sp);
-
/* Load current value from hardware to the shadow register. */
u32 host1x_syncpt_load(struct host1x_syncpt *sp);
@@ -133,8 +130,8 @@ void host1x_syncpt_restore(struct host1x *host);
/* Read current wait base value into shadow register and return it. */
u32 host1x_syncpt_load_wait_base(struct host1x_syncpt *sp);
-/* Increment sync point and its max. */
-void host1x_syncpt_incr(struct host1x_syncpt *sp);
+/* Request incrementing a sync point. */
+int host1x_syncpt_incr(struct host1x_syncpt *sp);
/* Indicate future operations by incrementing the sync point max. */
u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
--
1.8.1.5
--
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