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 @@ -698,23 +698,28 @@ int ipu_idmac_enable_channel(struct ipuv3_channel *channel) } EXPORT_SYMBOL_GPL(ipu_idmac_enable_channel); +int ipu_idmac_wait_busy(struct ipuv3_channel *channel, int ms) +{ + struct ipu_soc *ipu = channel->ipu; + unsigned long timeout; + + 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)) + 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; - unsigned long timeout; - - timeout = jiffies + msecs_to_jiffies(50); - 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; - } - cpu_relax(); - } spin_lock_irqsave(&ipu->lock, flags); 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);