diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-10-10 16:18:41 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-11 15:30:33 -0700 |
| commit | fb822a395f6deabd9a87838a4e3da4b87c801876 (patch) | |
| tree | c38dc43c55ca0c4cbcc3cdeaadfcec208ee9d781 /drivers/staging | |
| parent | 0b186416c943eebfad070d38768cc3f2a80d5443 (diff) | |
staging: drm/imx: make waiting for idle channel optional
Currently we wait for a channel until it's idle before actually
disabling it. This is not needed for all channels though, so make
waiting for idle a separate function and call it where necessary.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h | 1 | ||||
| -rw-r--r-- | drivers/staging/imx-drm/ipu-v3/ipu-common.c | 23 | ||||
| -rw-r--r-- | drivers/staging/imx-drm/ipuv3-crtc.c | 1 |
3 files changed, 16 insertions, 9 deletions
diff --git a/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h b/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h index 9bee6403f1e5..4826b5c0249d 100644 --- a/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h +++ b/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h @@ -97,6 +97,7 @@ void ipu_idmac_put(struct ipuv3_channel *); int ipu_idmac_enable_channel(struct ipuv3_channel *channel); int ipu_idmac_disable_channel(struct ipuv3_channel *channel); +int ipu_idmac_wait_busy(struct ipuv3_channel *channel, int ms); void ipu_idmac_set_double_buffer(struct ipuv3_channel *channel, bool doublebuffer); diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-common.c b/drivers/staging/imx-drm/ipu-v3/ipu-common.c index f90bdb4c08c2..5ca42f090088 100644 --- a/drivers/staging/imx-drm/ipu-v3/ipu-common.c +++ b/drivers/staging/imx-drm/ipu-v3/ipu-common.c @@ -698,24 +698,29 @@ int ipu_idmac_enable_channel(struct ipuv3_channel *channel) } EXPORT_SYMBOL_GPL(ipu_idmac_enable_channel); -int ipu_idmac_disable_channel(struct ipuv3_channel *channel) +int ipu_idmac_wait_busy(struct ipuv3_channel *channel, int ms) { struct ipu_soc *ipu = channel->ipu; - u32 val; - unsigned long flags; unsigned long timeout; - timeout = jiffies + msecs_to_jiffies(50); + timeout = jiffies + msecs_to_jiffies(ms); while (ipu_idmac_read(ipu, IDMAC_CHA_BUSY(channel->num)) & idma_mask(channel->num)) { - if (time_after(jiffies, timeout)) { - dev_warn(ipu->dev, "disabling busy idmac channel %d\n", - channel->num); - break; - } + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; cpu_relax(); } + return 0; +} +EXPORT_SYMBOL_GPL(ipu_idmac_wait_busy); + +int ipu_idmac_disable_channel(struct ipuv3_channel *channel) +{ + struct ipu_soc *ipu = channel->ipu; + u32 val; + unsigned long flags; + spin_lock_irqsave(&ipu->lock, flags); /* Disable DMA channel(s) */ diff --git a/drivers/staging/imx-drm/ipuv3-crtc.c b/drivers/staging/imx-drm/ipuv3-crtc.c index 6fd37a7453e9..574633b9bc13 100644 --- a/drivers/staging/imx-drm/ipuv3-crtc.c +++ b/drivers/staging/imx-drm/ipuv3-crtc.c @@ -102,6 +102,7 @@ static void ipu_fb_disable(struct ipu_crtc *ipu_crtc) if (ipu_crtc->dp) ipu_dp_disable_channel(ipu_crtc->dp); ipu_dc_disable_channel(ipu_crtc->dc); + ipu_idmac_wait_busy(ipu_crtc->ipu_ch, 50); ipu_idmac_disable_channel(ipu_crtc->ipu_ch); ipu_dmfc_disable_channel(ipu_crtc->dmfc); ipu_di_disable(ipu_crtc->di); |