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Message-Id: <1397512403-19622-6-git-send-email-p.zabel@pengutronix.de>
Date: Mon, 14 Apr 2014 23:53:20 +0200
From: Philipp Zabel <p.zabel@...gutronix.de>
To: devel@...verdev.osuosl.org,
Russell King <rmk+kernel@....linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
kernel@...gutronix.de, Philipp Zabel <p.zabel@...gutronix.de>
Subject: [PATCH v2 5/8] imx-drm: ipu-dp: Split disabling the DP foreground channel from disabling the DP module
The former has to be done before disabling the DMFC, the latter has to be
done afterwards. Otherwise the DMFC FIFOs never get cleared properly.
Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
---
drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h | 2 +
drivers/staging/imx-drm/ipu-v3/ipu-dp.c | 68 +++++++++++++++++++----------
drivers/staging/imx-drm/ipuv3-plane.c | 4 ++
3 files changed, 51 insertions(+), 23 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 2966e42..8678ad1 100644
--- a/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h
+++ b/drivers/staging/imx-drm/ipu-v3/imx-ipu-v3.h
@@ -153,8 +153,10 @@ void ipu_dmfc_put(struct dmfc_channel *dmfc);
struct ipu_dp *ipu_dp_get(struct ipu_soc *ipu, unsigned int flow);
void ipu_dp_put(struct ipu_dp *);
+int ipu_dp_enable(struct ipu_soc *ipu);
int ipu_dp_enable_channel(struct ipu_dp *dp);
void ipu_dp_disable_channel(struct ipu_dp *dp);
+void ipu_dp_disable(struct ipu_soc *ipu);
int ipu_dp_setup_channel(struct ipu_dp *dp,
enum ipu_color_space in, enum ipu_color_space out);
int ipu_dp_set_window_pos(struct ipu_dp *, u16 x_pos, u16 y_pos);
diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-dp.c b/drivers/staging/imx-drm/ipu-v3/ipu-dp.c
index 58f87c8..6980fa1 100644
--- a/drivers/staging/imx-drm/ipu-v3/ipu-dp.c
+++ b/drivers/staging/imx-drm/ipu-v3/ipu-dp.c
@@ -215,10 +215,9 @@ int ipu_dp_setup_channel(struct ipu_dp *dp,
}
EXPORT_SYMBOL_GPL(ipu_dp_setup_channel);
-int ipu_dp_enable_channel(struct ipu_dp *dp)
+int ipu_dp_enable(struct ipu_soc *ipu)
{
- struct ipu_flow *flow = to_flow(dp);
- struct ipu_dp_priv *priv = flow->priv;
+ struct ipu_dp_priv *priv = ipu->dp_priv;
mutex_lock(&priv->mutex);
@@ -227,15 +226,28 @@ int ipu_dp_enable_channel(struct ipu_dp *dp)
priv->use_count++;
- if (dp->foreground) {
- u32 reg;
+ mutex_unlock(&priv->mutex);
- reg = readl(flow->base + DP_COM_CONF);
- reg |= DP_COM_CONF_FG_EN;
- writel(reg, flow->base + DP_COM_CONF);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_dp_enable);
- ipu_srm_dp_sync_update(priv->ipu);
- }
+int ipu_dp_enable_channel(struct ipu_dp *dp)
+{
+ struct ipu_flow *flow = to_flow(dp);
+ struct ipu_dp_priv *priv = flow->priv;
+ u32 reg;
+
+ if (!dp->foreground)
+ return 0;
+
+ mutex_lock(&priv->mutex);
+
+ reg = readl(flow->base + DP_COM_CONF);
+ reg |= DP_COM_CONF_FG_EN;
+ writel(reg, flow->base + DP_COM_CONF);
+
+ ipu_srm_dp_sync_update(priv->ipu);
mutex_unlock(&priv->mutex);
@@ -247,25 +259,35 @@ void ipu_dp_disable_channel(struct ipu_dp *dp)
{
struct ipu_flow *flow = to_flow(dp);
struct ipu_dp_priv *priv = flow->priv;
+ u32 reg, csc;
+
+ if (!dp->foreground)
+ return;
mutex_lock(&priv->mutex);
- priv->use_count--;
+ reg = readl(flow->base + DP_COM_CONF);
+ csc = reg & DP_COM_CONF_CSC_DEF_MASK;
+ if (csc == DP_COM_CONF_CSC_DEF_FG)
+ reg &= ~DP_COM_CONF_CSC_DEF_MASK;
- if (dp->foreground) {
- u32 reg, csc;
+ reg &= ~DP_COM_CONF_FG_EN;
+ writel(reg, flow->base + DP_COM_CONF);
- reg = readl(flow->base + DP_COM_CONF);
- csc = reg & DP_COM_CONF_CSC_DEF_MASK;
- if (csc == DP_COM_CONF_CSC_DEF_FG)
- reg &= ~DP_COM_CONF_CSC_DEF_MASK;
+ writel(0, flow->base + DP_FG_POS);
+ ipu_srm_dp_sync_update(priv->ipu);
- reg &= ~DP_COM_CONF_FG_EN;
- writel(reg, flow->base + DP_COM_CONF);
+ mutex_unlock(&priv->mutex);
+}
+EXPORT_SYMBOL_GPL(ipu_dp_disable_channel);
- writel(0, flow->base + DP_FG_POS);
- ipu_srm_dp_sync_update(priv->ipu);
- }
+void ipu_dp_disable(struct ipu_soc *ipu)
+{
+ struct ipu_dp_priv *priv = ipu->dp_priv;
+
+ mutex_lock(&priv->mutex);
+
+ priv->use_count--;
if (!priv->use_count)
ipu_module_disable(priv->ipu, IPU_CONF_DP_EN);
@@ -275,7 +297,7 @@ void ipu_dp_disable_channel(struct ipu_dp *dp)
mutex_unlock(&priv->mutex);
}
-EXPORT_SYMBOL_GPL(ipu_dp_disable_channel);
+EXPORT_SYMBOL_GPL(ipu_dp_disable);
struct ipu_dp *ipu_dp_get(struct ipu_soc *ipu, unsigned int flow)
{
diff --git a/drivers/staging/imx-drm/ipuv3-plane.c b/drivers/staging/imx-drm/ipuv3-plane.c
index 27a8d73..5697e59 100644
--- a/drivers/staging/imx-drm/ipuv3-plane.c
+++ b/drivers/staging/imx-drm/ipuv3-plane.c
@@ -239,6 +239,8 @@ err_out:
void ipu_plane_enable(struct ipu_plane *ipu_plane)
{
+ if (ipu_plane->dp)
+ ipu_dp_enable(ipu_plane->ipu);
ipu_dmfc_enable_channel(ipu_plane->dmfc);
ipu_idmac_enable_channel(ipu_plane->ipu_ch);
if (ipu_plane->dp)
@@ -257,6 +259,8 @@ void ipu_plane_disable(struct ipu_plane *ipu_plane)
ipu_dp_disable_channel(ipu_plane->dp);
ipu_idmac_disable_channel(ipu_plane->ipu_ch);
ipu_dmfc_disable_channel(ipu_plane->dmfc);
+ if (ipu_plane->dp)
+ ipu_dp_disable(ipu_plane->ipu);
}
static void ipu_plane_dpms(struct ipu_plane *ipu_plane, int mode)
--
1.9.1
--
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