[PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Sakari Ailus]

If the CSI-2 receiver isn't part of the pipeline (or isn't there to begin
with), skip its initialisation.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on Beagleboard-xM + MPT9P031
Acked-by: Pavel Machek <pavel@ucw.cz>
---
since v1.1:

- Assign phy->entity before calling omap3isp_csiphy_config(), for
  phy->entity is used by omap3isp_csiphy_config(). (Thanks to Pavel for
  spotting this.)

 drivers/media/platform/omap3isp/ispccp2.c   |  2 +-
 drivers/media/platform/omap3isp/ispcsi2.c   |  4 +--
 drivers/media/platform/omap3isp/ispcsiphy.c | 38 +++++++++++++++--------------
 drivers/media/platform/omap3isp/ispcsiphy.h |  6 +++--
 4 files changed, 27 insertions(+), 23 deletions(-)

diff --git a/drivers/media/platform/omap3isp/ispccp2.c b/drivers/media/platform/omap3isp/ispccp2.c
index 47210b102bcb..3db8df09cd9a 100644
--- a/drivers/media/platform/omap3isp/ispccp2.c
+++ b/drivers/media/platform/omap3isp/ispccp2.c
@@ -841,7 +841,7 @@ static int ccp2_s_stream(struct v4l2_subdev *sd, int enable)
 	switch (enable) {
 	case ISP_PIPELINE_STREAM_CONTINUOUS:
 		if (ccp2->phy) {
-			ret = omap3isp_csiphy_acquire(ccp2->phy);
+			ret = omap3isp_csiphy_acquire(ccp2->phy, &sd->entity);
 			if (ret < 0)
 				return ret;
 		}
diff --git a/drivers/media/platform/omap3isp/ispcsi2.c b/drivers/media/platform/omap3isp/ispcsi2.c
index 7dae2fe0d42d..3ec37fed710b 100644
--- a/drivers/media/platform/omap3isp/ispcsi2.c
+++ b/drivers/media/platform/omap3isp/ispcsi2.c
@@ -490,7 +490,7 @@ int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
 	if (!csi2->available)
 		return -ENODEV;
 
-	if (csi2->phy->phy_in_use)
+	if (csi2->phy->entity)
 		return -EBUSY;
 
 	isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
@@ -1053,7 +1053,7 @@ static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
 
 	switch (enable) {
 	case ISP_PIPELINE_STREAM_CONTINUOUS:
-		if (omap3isp_csiphy_acquire(csi2->phy) < 0)
+		if (omap3isp_csiphy_acquire(csi2->phy, &sd->entity) < 0)
 			return -ENODEV;
 		if (csi2->output & CSI2_OUTPUT_MEMORY)
 			omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c
index 2028bb519108..aedd88fa8246 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.c
+++ b/drivers/media/platform/omap3isp/ispcsiphy.c
@@ -164,15 +164,18 @@ static int csiphy_set_power(struct isp_csiphy *phy, u32 power)
 
 static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 {
-	struct isp_csi2_device *csi2 = phy->csi2;
-	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
-	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
+	struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
+	struct isp_bus_cfg *buscfg;
 	struct isp_csiphy_lanes_cfg *lanes;
 	int csi2_ddrclk_khz;
 	unsigned int num_data_lanes, used_lanes = 0;
 	unsigned int i;
 	u32 reg;
 
+	if (!pipe)
+		return -EBUSY;
+
+	buscfg = pipe->external->host_priv;
 	if (!buscfg) {
 		struct isp_async_subdev *isd =
 			container_of(pipe->external->asd,
@@ -222,7 +225,7 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	csi2_ddrclk_khz = pipe->external_rate / 1000
 		/ (2 * hweight32(used_lanes)) * pipe->external_width;
 
-	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG0);
+	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG0);
 
 	reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK |
 		 ISPCSIPHY_REG0_THS_SETTLE_MASK);
@@ -233,9 +236,9 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	reg |= (DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3)
 		<< ISPCSIPHY_REG0_THS_SETTLE_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
+	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
 
-	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG1);
+	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG1);
 
 	reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK |
 		 ISPCSIPHY_REG1_TCLK_MISS_MASK |
@@ -244,10 +247,10 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	reg |= TCLK_MISS << ISPCSIPHY_REG1_TCLK_MISS_SHIFT;
 	reg |= TCLK_SETTLE << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
+	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
 
 	/* DPHY lane configuration */
-	reg = isp_reg_readl(csi2->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
+	reg = isp_reg_readl(phy->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
 
 	for (i = 0; i < num_data_lanes; i++) {
 		reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) |
@@ -263,12 +266,12 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	reg |= lanes->clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT;
 	reg |= lanes->clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
+	isp_reg_writel(phy->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
 
 	return 0;
 }
 
-int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
+int omap3isp_csiphy_acquire(struct isp_csiphy *phy, struct media_entity *entity)
 {
 	int rval;
 
@@ -288,6 +291,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
 	if (rval < 0)
 		goto done;
 
+	phy->entity = entity;
+
 	rval = omap3isp_csiphy_config(phy);
 	if (rval < 0)
 		goto done;
@@ -301,10 +306,9 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
 
 		csiphy_power_autoswitch_enable(phy, true);
 	}
-
-	phy->phy_in_use = 1;
-
 done:
+	phy->entity = NULL;
+
 	mutex_unlock(&phy->mutex);
 	return rval;
 }
@@ -312,10 +316,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
 void omap3isp_csiphy_release(struct isp_csiphy *phy)
 {
 	mutex_lock(&phy->mutex);
-	if (phy->phy_in_use) {
-		struct isp_csi2_device *csi2 = phy->csi2;
-		struct isp_pipeline *pipe =
-			to_isp_pipeline(&csi2->subdev.entity);
+	if (phy->entity && phy->entity->pipe) {
+		struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
 		struct isp_bus_cfg *buscfg = pipe->external->host_priv;
 
 		csiphy_routing_cfg(phy, buscfg->interface, false,
@@ -325,7 +327,7 @@ void omap3isp_csiphy_release(struct isp_csiphy *phy)
 			csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_OFF);
 		}
 		regulator_disable(phy->vdd);
-		phy->phy_in_use = 0;
+		phy->entity = NULL;
 	}
 	mutex_unlock(&phy->mutex);
 }
diff --git a/drivers/media/platform/omap3isp/ispcsiphy.h b/drivers/media/platform/omap3isp/ispcsiphy.h
index 978ca5c80a6c..cffda0265767 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.h
+++ b/drivers/media/platform/omap3isp/ispcsiphy.h
@@ -25,9 +25,10 @@ struct regulator;
 struct isp_csiphy {
 	struct isp_device *isp;
 	struct mutex mutex;	/* serialize csiphy configuration */
-	u8 phy_in_use;
 	struct isp_csi2_device *csi2;
 	struct regulator *vdd;
+	/* the entity for which the phy was acquired for */
+	struct media_entity *entity;
 
 	/* mem resources - enums as defined in enum isp_mem_resources */
 	unsigned int cfg_regs;
@@ -36,7 +37,8 @@ struct isp_csiphy {
 	u8 num_data_lanes;	/* number of CSI2 Data Lanes supported */
 };
 
-int omap3isp_csiphy_acquire(struct isp_csiphy *phy);
+int omap3isp_csiphy_acquire(struct isp_csiphy *phy,
+			    struct media_entity *entity);
 void omap3isp_csiphy_release(struct isp_csiphy *phy);
 int omap3isp_csiphy_init(struct isp_device *isp);
 void omap3isp_csiphy_cleanup(struct isp_device *isp);
-- 
2.11.0

Re: [PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Pavel Machek]

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On Fri 2017-08-11 12:57:09, Sakari Ailus wrote:
> If the CSI-2 receiver isn't part of the pipeline (or isn't there to begin
> with), skip its initialisation.
> 
> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on Beagleboard-xM + MPT9P031
> Acked-by: Pavel Machek <pavel@ucw.cz>

Tested-by: Pavel Machek <pavel@ucw.cz> # On Nokia N900.

> ---
> since v1.1:
> 
> - Assign phy->entity before calling omap3isp_csiphy_config(), for
>   phy->entity is used by omap3isp_csiphy_config(). (Thanks to Pavel for
>   spotting this.)

Thanks for all the help!
								Pavel
								

>  drivers/media/platform/omap3isp/ispccp2.c   |  2 +-
>  drivers/media/platform/omap3isp/ispcsi2.c   |  4 +--
>  drivers/media/platform/omap3isp/ispcsiphy.c | 38 +++++++++++++++--------------
>  drivers/media/platform/omap3isp/ispcsiphy.h |  6 +++--
>  4 files changed, 27 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/media/platform/omap3isp/ispccp2.c b/drivers/media/platform/omap3isp/ispccp2.c
> index 47210b102bcb..3db8df09cd9a 100644
> --- a/drivers/media/platform/omap3isp/ispccp2.c
> +++ b/drivers/media/platform/omap3isp/ispccp2.c
> @@ -841,7 +841,7 @@ static int ccp2_s_stream(struct v4l2_subdev *sd, int enable)
>  	switch (enable) {
>  	case ISP_PIPELINE_STREAM_CONTINUOUS:
>  		if (ccp2->phy) {
> -			ret = omap3isp_csiphy_acquire(ccp2->phy);
> +			ret = omap3isp_csiphy_acquire(ccp2->phy, &sd->entity);
>  			if (ret < 0)
>  				return ret;
>  		}
> diff --git a/drivers/media/platform/omap3isp/ispcsi2.c b/drivers/media/platform/omap3isp/ispcsi2.c
> index 7dae2fe0d42d..3ec37fed710b 100644
> --- a/drivers/media/platform/omap3isp/ispcsi2.c
> +++ b/drivers/media/platform/omap3isp/ispcsi2.c
> @@ -490,7 +490,7 @@ int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
>  	if (!csi2->available)
>  		return -ENODEV;
>  
> -	if (csi2->phy->phy_in_use)
> +	if (csi2->phy->entity)
>  		return -EBUSY;
>  
>  	isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
> @@ -1053,7 +1053,7 @@ static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
>  
>  	switch (enable) {
>  	case ISP_PIPELINE_STREAM_CONTINUOUS:
> -		if (omap3isp_csiphy_acquire(csi2->phy) < 0)
> +		if (omap3isp_csiphy_acquire(csi2->phy, &sd->entity) < 0)
>  			return -ENODEV;
>  		if (csi2->output & CSI2_OUTPUT_MEMORY)
>  			omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
> diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c
> index 2028bb519108..aedd88fa8246 100644
> --- a/drivers/media/platform/omap3isp/ispcsiphy.c
> +++ b/drivers/media/platform/omap3isp/ispcsiphy.c
> @@ -164,15 +164,18 @@ static int csiphy_set_power(struct isp_csiphy *phy, u32 power)
>  
>  static int omap3isp_csiphy_config(struct isp_csiphy *phy)
>  {
> -	struct isp_csi2_device *csi2 = phy->csi2;
> -	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
> -	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> +	struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
> +	struct isp_bus_cfg *buscfg;
>  	struct isp_csiphy_lanes_cfg *lanes;
>  	int csi2_ddrclk_khz;
>  	unsigned int num_data_lanes, used_lanes = 0;
>  	unsigned int i;
>  	u32 reg;
>  
> +	if (!pipe)
> +		return -EBUSY;
> +
> +	buscfg = pipe->external->host_priv;
>  	if (!buscfg) {
>  		struct isp_async_subdev *isd =
>  			container_of(pipe->external->asd,
> @@ -222,7 +225,7 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
>  	csi2_ddrclk_khz = pipe->external_rate / 1000
>  		/ (2 * hweight32(used_lanes)) * pipe->external_width;
>  
> -	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG0);
> +	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG0);
>  
>  	reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK |
>  		 ISPCSIPHY_REG0_THS_SETTLE_MASK);
> @@ -233,9 +236,9 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
>  	reg |= (DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3)
>  		<< ISPCSIPHY_REG0_THS_SETTLE_SHIFT;
>  
> -	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
> +	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
>  
> -	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG1);
> +	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG1);
>  
>  	reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK |
>  		 ISPCSIPHY_REG1_TCLK_MISS_MASK |
> @@ -244,10 +247,10 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
>  	reg |= TCLK_MISS << ISPCSIPHY_REG1_TCLK_MISS_SHIFT;
>  	reg |= TCLK_SETTLE << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT;
>  
> -	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
> +	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
>  
>  	/* DPHY lane configuration */
> -	reg = isp_reg_readl(csi2->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
> +	reg = isp_reg_readl(phy->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
>  
>  	for (i = 0; i < num_data_lanes; i++) {
>  		reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) |
> @@ -263,12 +266,12 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
>  	reg |= lanes->clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT;
>  	reg |= lanes->clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT;
>  
> -	isp_reg_writel(csi2->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
> +	isp_reg_writel(phy->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
>  
>  	return 0;
>  }
>  
> -int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> +int omap3isp_csiphy_acquire(struct isp_csiphy *phy, struct media_entity *entity)
>  {
>  	int rval;
>  
> @@ -288,6 +291,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
>  	if (rval < 0)
>  		goto done;
>  
> +	phy->entity = entity;
> +
>  	rval = omap3isp_csiphy_config(phy);
>  	if (rval < 0)
>  		goto done;
> @@ -301,10 +306,9 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
>  
>  		csiphy_power_autoswitch_enable(phy, true);
>  	}
> -
> -	phy->phy_in_use = 1;
> -
>  done:
> +	phy->entity = NULL;
> +
>  	mutex_unlock(&phy->mutex);
>  	return rval;
>  }
> @@ -312,10 +316,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
>  void omap3isp_csiphy_release(struct isp_csiphy *phy)
>  {
>  	mutex_lock(&phy->mutex);
> -	if (phy->phy_in_use) {
> -		struct isp_csi2_device *csi2 = phy->csi2;
> -		struct isp_pipeline *pipe =
> -			to_isp_pipeline(&csi2->subdev.entity);
> +	if (phy->entity && phy->entity->pipe) {
> +		struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
>  		struct isp_bus_cfg *buscfg = pipe->external->host_priv;
>  
>  		csiphy_routing_cfg(phy, buscfg->interface, false,
> @@ -325,7 +327,7 @@ void omap3isp_csiphy_release(struct isp_csiphy *phy)
>  			csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_OFF);
>  		}
>  		regulator_disable(phy->vdd);
> -		phy->phy_in_use = 0;
> +		phy->entity = NULL;
>  	}
>  	mutex_unlock(&phy->mutex);
>  }
> diff --git a/drivers/media/platform/omap3isp/ispcsiphy.h b/drivers/media/platform/omap3isp/ispcsiphy.h
> index 978ca5c80a6c..cffda0265767 100644
> --- a/drivers/media/platform/omap3isp/ispcsiphy.h
> +++ b/drivers/media/platform/omap3isp/ispcsiphy.h
> @@ -25,9 +25,10 @@ struct regulator;
>  struct isp_csiphy {
>  	struct isp_device *isp;
>  	struct mutex mutex;	/* serialize csiphy configuration */
> -	u8 phy_in_use;
>  	struct isp_csi2_device *csi2;
>  	struct regulator *vdd;
> +	/* the entity for which the phy was acquired for */
> +	struct media_entity *entity;
>  
>  	/* mem resources - enums as defined in enum isp_mem_resources */
>  	unsigned int cfg_regs;
> @@ -36,7 +37,8 @@ struct isp_csiphy {
>  	u8 num_data_lanes;	/* number of CSI2 Data Lanes supported */
>  };
>  
> -int omap3isp_csiphy_acquire(struct isp_csiphy *phy);
> +int omap3isp_csiphy_acquire(struct isp_csiphy *phy,
> +			    struct media_entity *entity);
>  void omap3isp_csiphy_release(struct isp_csiphy *phy);
>  int omap3isp_csiphy_init(struct isp_device *isp);
>  void omap3isp_csiphy_cleanup(struct isp_device *isp);

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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Re: [PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Laurent Pinchart]

Hi Sakari,

Thank you for the patch.

On Friday 11 Aug 2017 12:57:09 Sakari Ailus wrote:
> If the CSI-2 receiver isn't part of the pipeline (or isn't there to begin
> with), skip its initialisation.

I don't think the commit message really describes the patch.

> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on
> Beagleboard-xM + MPT9P031 Acked-by: Pavel Machek <pavel@ucw.cz>
> ---
> since v1.1:
> 
> - Assign phy->entity before calling omap3isp_csiphy_config(), for
>   phy->entity is used by omap3isp_csiphy_config(). (Thanks to Pavel for
>   spotting this.)
> 
>  drivers/media/platform/omap3isp/ispccp2.c   |  2 +-
>  drivers/media/platform/omap3isp/ispcsi2.c   |  4 +--
>  drivers/media/platform/omap3isp/ispcsiphy.c | 38 ++++++++++++--------------
>  drivers/media/platform/omap3isp/ispcsiphy.h |  6 +++--
>  4 files changed, 27 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/media/platform/omap3isp/ispccp2.c
> b/drivers/media/platform/omap3isp/ispccp2.c index
> 47210b102bcb..3db8df09cd9a 100644
> --- a/drivers/media/platform/omap3isp/ispccp2.c
> +++ b/drivers/media/platform/omap3isp/ispccp2.c
> @@ -841,7 +841,7 @@ static int ccp2_s_stream(struct v4l2_subdev *sd, int
> enable) switch (enable) {
>  	case ISP_PIPELINE_STREAM_CONTINUOUS:
>  		if (ccp2->phy) {
> -			ret = omap3isp_csiphy_acquire(ccp2->phy);
> +			ret = omap3isp_csiphy_acquire(ccp2->phy, &sd->entity);
>  			if (ret < 0)
>  				return ret;
>  		}
> diff --git a/drivers/media/platform/omap3isp/ispcsi2.c
> b/drivers/media/platform/omap3isp/ispcsi2.c index
> 7dae2fe0d42d..3ec37fed710b 100644
> --- a/drivers/media/platform/omap3isp/ispcsi2.c
> +++ b/drivers/media/platform/omap3isp/ispcsi2.c
> @@ -490,7 +490,7 @@ int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
>  	if (!csi2->available)
>  		return -ENODEV;
> 
> -	if (csi2->phy->phy_in_use)
> +	if (csi2->phy->entity)
>  		return -EBUSY;
> 
>  	isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
> @@ -1053,7 +1053,7 @@ static int csi2_set_stream(struct v4l2_subdev *sd, int
> enable)
> 
>  	switch (enable) {
>  	case ISP_PIPELINE_STREAM_CONTINUOUS:
> -		if (omap3isp_csiphy_acquire(csi2->phy) < 0)
> +		if (omap3isp_csiphy_acquire(csi2->phy, &sd->entity) < 0)
>  			return -ENODEV;
>  		if (csi2->output & CSI2_OUTPUT_MEMORY)
>  			omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
> diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c
> b/drivers/media/platform/omap3isp/ispcsiphy.c index
> 2028bb519108..aedd88fa8246 100644
> --- a/drivers/media/platform/omap3isp/ispcsiphy.c
> +++ b/drivers/media/platform/omap3isp/ispcsiphy.c
> @@ -164,15 +164,18 @@ static int csiphy_set_power(struct isp_csiphy *phy,
> u32 power)
> 
>  static int omap3isp_csiphy_config(struct isp_csiphy *phy)
>  {
> -	struct isp_csi2_device *csi2 = phy->csi2;
> -	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
> -	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> +	struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
> +	struct isp_bus_cfg *buscfg;
>  	struct isp_csiphy_lanes_cfg *lanes;
>  	int csi2_ddrclk_khz;
>  	unsigned int num_data_lanes, used_lanes = 0;
>  	unsigned int i;
>  	u32 reg;
> 
> +	if (!pipe)
> +		return -EBUSY;

When can this happen ?

> +	buscfg = pipe->external->host_priv;
>  	if (!buscfg) {
>  		struct isp_async_subdev *isd =
>  			container_of(pipe->external->asd,
> @@ -222,7 +225,7 @@ static int omap3isp_csiphy_config(struct isp_csiphy
> *phy) csi2_ddrclk_khz = pipe->external_rate / 1000
>  		/ (2 * hweight32(used_lanes)) * pipe->external_width;
> 
> -	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG0);
> +	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG0);
> 
>  	reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK |
>  		 ISPCSIPHY_REG0_THS_SETTLE_MASK);
> @@ -233,9 +236,9 @@ static int omap3isp_csiphy_config(struct isp_csiphy
> *phy) reg |= (DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3)
>  		<< ISPCSIPHY_REG0_THS_SETTLE_SHIFT;
> 
> -	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
> +	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
> 
> -	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG1);
> +	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG1);
> 
>  	reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK |
>  		 ISPCSIPHY_REG1_TCLK_MISS_MASK |
> @@ -244,10 +247,10 @@ static int omap3isp_csiphy_config(struct isp_csiphy
> *phy) reg |= TCLK_MISS << ISPCSIPHY_REG1_TCLK_MISS_SHIFT;
>  	reg |= TCLK_SETTLE << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT;
> 
> -	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
> +	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
> 
>  	/* DPHY lane configuration */
> -	reg = isp_reg_readl(csi2->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
> +	reg = isp_reg_readl(phy->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
> 
>  	for (i = 0; i < num_data_lanes; i++) {
>  		reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) |
> @@ -263,12 +266,12 @@ static int omap3isp_csiphy_config(struct isp_csiphy
> *phy) reg |= lanes->clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT;
>  	reg |= lanes->clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT;
> 
> -	isp_reg_writel(csi2->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
> +	isp_reg_writel(phy->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
> 
>  	return 0;
>  }
> 
> -int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> +int omap3isp_csiphy_acquire(struct isp_csiphy *phy, struct media_entity
> *entity) {
>  	int rval;
> 
> @@ -288,6 +291,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
>  	if (rval < 0)
>  		goto done;
> 
> +	phy->entity = entity;
> +
>  	rval = omap3isp_csiphy_config(phy);
>  	if (rval < 0)
>  		goto done;
> @@ -301,10 +306,9 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> 
>  		csiphy_power_autoswitch_enable(phy, true);
>  	}
> -
> -	phy->phy_in_use = 1;
> -
>  done:
> +	phy->entity = NULL;
> +

Did you really mean to release the PHY here ?

>  	mutex_unlock(&phy->mutex);
>  	return rval;
>  }
> @@ -312,10 +316,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
>  void omap3isp_csiphy_release(struct isp_csiphy *phy)
>  {
>  	mutex_lock(&phy->mutex);
> -	if (phy->phy_in_use) {
> -		struct isp_csi2_device *csi2 = phy->csi2;
> -		struct isp_pipeline *pipe =
> -			to_isp_pipeline(&csi2->subdev.entity);
> +	if (phy->entity && phy->entity->pipe) {
> +		struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
>  		struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> 
>  		csiphy_routing_cfg(phy, buscfg->interface, false,
> @@ -325,7 +327,7 @@ void omap3isp_csiphy_release(struct isp_csiphy *phy)
>  			csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_OFF);
>  		}
>  		regulator_disable(phy->vdd);
> -		phy->phy_in_use = 0;
> +		phy->entity = NULL;
>  	}
>  	mutex_unlock(&phy->mutex);
>  }
> diff --git a/drivers/media/platform/omap3isp/ispcsiphy.h
> b/drivers/media/platform/omap3isp/ispcsiphy.h index
> 978ca5c80a6c..cffda0265767 100644
> --- a/drivers/media/platform/omap3isp/ispcsiphy.h
> +++ b/drivers/media/platform/omap3isp/ispcsiphy.h
> @@ -25,9 +25,10 @@ struct regulator;
>  struct isp_csiphy {
>  	struct isp_device *isp;
>  	struct mutex mutex;	/* serialize csiphy configuration */
> -	u8 phy_in_use;
>  	struct isp_csi2_device *csi2;
>  	struct regulator *vdd;
> +	/* the entity for which the phy was acquired for */

Either "the entity that the phy was acquired for", or "the entity for which 
the phy was acquired". Or you could rename the field to owner and document it 
as "the entity owning the PHY", I think that would be more explicit in the 
code.

> +	struct media_entity *entity;
> 
>  	/* mem resources - enums as defined in enum isp_mem_resources */
>  	unsigned int cfg_regs;
> @@ -36,7 +37,8 @@ struct isp_csiphy {
>  	u8 num_data_lanes;	/* number of CSI2 Data Lanes supported */
>  };
> 
> -int omap3isp_csiphy_acquire(struct isp_csiphy *phy);
> +int omap3isp_csiphy_acquire(struct isp_csiphy *phy,
> +			    struct media_entity *entity);
>  void omap3isp_csiphy_release(struct isp_csiphy *phy);
>  int omap3isp_csiphy_init(struct isp_device *isp);
>  void omap3isp_csiphy_cleanup(struct isp_device *isp);

-- 
Regards,

Laurent Pinchart

Re: [PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Sakari Ailus]

Hi Pavel,

On Fri, Aug 11, 2017 at 12:46:05PM +0200, Pavel Machek wrote:
> On Fri 2017-08-11 12:57:09, Sakari Ailus wrote:
> > If the CSI-2 receiver isn't part of the pipeline (or isn't there to begin
> > with), skip its initialisation.
> > 
> > Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> > Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on Beagleboard-xM + MPT9P031
> > Acked-by: Pavel Machek <pavel@ucw.cz>
> 
> Tested-by: Pavel Machek <pavel@ucw.cz> # On Nokia N900.
> 
> > ---
> > since v1.1:
> > 
> > - Assign phy->entity before calling omap3isp_csiphy_config(), for
> >   phy->entity is used by omap3isp_csiphy_config(). (Thanks to Pavel for
> >   spotting this.)
> 
> Thanks for all the help!

You're welcome!

I'll still send a new version; this one sets phy->entity NULL independently
of whether everything goes well...

There's something wrong somewhere else, I can't capture images on master
branch anymore. I'm trying to figure out what's wrong.

> 								Pavel
> 								
> 
> >  drivers/media/platform/omap3isp/ispccp2.c   |  2 +-
> >  drivers/media/platform/omap3isp/ispcsi2.c   |  4 +--
> >  drivers/media/platform/omap3isp/ispcsiphy.c | 38 +++++++++++++++--------------
> >  drivers/media/platform/omap3isp/ispcsiphy.h |  6 +++--
> >  4 files changed, 27 insertions(+), 23 deletions(-)
> > 
> > diff --git a/drivers/media/platform/omap3isp/ispccp2.c b/drivers/media/platform/omap3isp/ispccp2.c
> > index 47210b102bcb..3db8df09cd9a 100644
> > --- a/drivers/media/platform/omap3isp/ispccp2.c
> > +++ b/drivers/media/platform/omap3isp/ispccp2.c
> > @@ -841,7 +841,7 @@ static int ccp2_s_stream(struct v4l2_subdev *sd, int enable)
> >  	switch (enable) {
> >  	case ISP_PIPELINE_STREAM_CONTINUOUS:
> >  		if (ccp2->phy) {
> > -			ret = omap3isp_csiphy_acquire(ccp2->phy);
> > +			ret = omap3isp_csiphy_acquire(ccp2->phy, &sd->entity);
> >  			if (ret < 0)
> >  				return ret;
> >  		}
> > diff --git a/drivers/media/platform/omap3isp/ispcsi2.c b/drivers/media/platform/omap3isp/ispcsi2.c
> > index 7dae2fe0d42d..3ec37fed710b 100644
> > --- a/drivers/media/platform/omap3isp/ispcsi2.c
> > +++ b/drivers/media/platform/omap3isp/ispcsi2.c
> > @@ -490,7 +490,7 @@ int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
> >  	if (!csi2->available)
> >  		return -ENODEV;
> >  
> > -	if (csi2->phy->phy_in_use)
> > +	if (csi2->phy->entity)
> >  		return -EBUSY;
> >  
> >  	isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
> > @@ -1053,7 +1053,7 @@ static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
> >  
> >  	switch (enable) {
> >  	case ISP_PIPELINE_STREAM_CONTINUOUS:
> > -		if (omap3isp_csiphy_acquire(csi2->phy) < 0)
> > +		if (omap3isp_csiphy_acquire(csi2->phy, &sd->entity) < 0)
> >  			return -ENODEV;
> >  		if (csi2->output & CSI2_OUTPUT_MEMORY)
> >  			omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
> > diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c
> > index 2028bb519108..aedd88fa8246 100644
> > --- a/drivers/media/platform/omap3isp/ispcsiphy.c
> > +++ b/drivers/media/platform/omap3isp/ispcsiphy.c
> > @@ -164,15 +164,18 @@ static int csiphy_set_power(struct isp_csiphy *phy, u32 power)
> >  
> >  static int omap3isp_csiphy_config(struct isp_csiphy *phy)
> >  {
> > -	struct isp_csi2_device *csi2 = phy->csi2;
> > -	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
> > -	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> > +	struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
> > +	struct isp_bus_cfg *buscfg;
> >  	struct isp_csiphy_lanes_cfg *lanes;
> >  	int csi2_ddrclk_khz;
> >  	unsigned int num_data_lanes, used_lanes = 0;
> >  	unsigned int i;
> >  	u32 reg;
> >  
> > +	if (!pipe)
> > +		return -EBUSY;
> > +
> > +	buscfg = pipe->external->host_priv;
> >  	if (!buscfg) {
> >  		struct isp_async_subdev *isd =
> >  			container_of(pipe->external->asd,
> > @@ -222,7 +225,7 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
> >  	csi2_ddrclk_khz = pipe->external_rate / 1000
> >  		/ (2 * hweight32(used_lanes)) * pipe->external_width;
> >  
> > -	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG0);
> > +	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG0);
> >  
> >  	reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK |
> >  		 ISPCSIPHY_REG0_THS_SETTLE_MASK);
> > @@ -233,9 +236,9 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
> >  	reg |= (DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3)
> >  		<< ISPCSIPHY_REG0_THS_SETTLE_SHIFT;
> >  
> > -	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
> > +	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
> >  
> > -	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG1);
> > +	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG1);
> >  
> >  	reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK |
> >  		 ISPCSIPHY_REG1_TCLK_MISS_MASK |
> > @@ -244,10 +247,10 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
> >  	reg |= TCLK_MISS << ISPCSIPHY_REG1_TCLK_MISS_SHIFT;
> >  	reg |= TCLK_SETTLE << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT;
> >  
> > -	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
> > +	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
> >  
> >  	/* DPHY lane configuration */
> > -	reg = isp_reg_readl(csi2->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
> > +	reg = isp_reg_readl(phy->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
> >  
> >  	for (i = 0; i < num_data_lanes; i++) {
> >  		reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) |
> > @@ -263,12 +266,12 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
> >  	reg |= lanes->clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT;
> >  	reg |= lanes->clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT;
> >  
> > -	isp_reg_writel(csi2->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
> > +	isp_reg_writel(phy->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
> >  
> >  	return 0;
> >  }
> >  
> > -int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> > +int omap3isp_csiphy_acquire(struct isp_csiphy *phy, struct media_entity *entity)
> >  {
> >  	int rval;
> >  
> > @@ -288,6 +291,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> >  	if (rval < 0)
> >  		goto done;
> >  
> > +	phy->entity = entity;
> > +
> >  	rval = omap3isp_csiphy_config(phy);
> >  	if (rval < 0)
> >  		goto done;
> > @@ -301,10 +306,9 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> >  
> >  		csiphy_power_autoswitch_enable(phy, true);
> >  	}
> > -
> > -	phy->phy_in_use = 1;
> > -
> >  done:
> > +	phy->entity = NULL;
> > +
> >  	mutex_unlock(&phy->mutex);
> >  	return rval;
> >  }
> > @@ -312,10 +316,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> >  void omap3isp_csiphy_release(struct isp_csiphy *phy)
> >  {
> >  	mutex_lock(&phy->mutex);
> > -	if (phy->phy_in_use) {
> > -		struct isp_csi2_device *csi2 = phy->csi2;
> > -		struct isp_pipeline *pipe =
> > -			to_isp_pipeline(&csi2->subdev.entity);
> > +	if (phy->entity && phy->entity->pipe) {
> > +		struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
> >  		struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> >  
> >  		csiphy_routing_cfg(phy, buscfg->interface, false,
> > @@ -325,7 +327,7 @@ void omap3isp_csiphy_release(struct isp_csiphy *phy)
> >  			csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_OFF);
> >  		}
> >  		regulator_disable(phy->vdd);
> > -		phy->phy_in_use = 0;
> > +		phy->entity = NULL;
> >  	}
> >  	mutex_unlock(&phy->mutex);
> >  }
> > diff --git a/drivers/media/platform/omap3isp/ispcsiphy.h b/drivers/media/platform/omap3isp/ispcsiphy.h
> > index 978ca5c80a6c..cffda0265767 100644
> > --- a/drivers/media/platform/omap3isp/ispcsiphy.h
> > +++ b/drivers/media/platform/omap3isp/ispcsiphy.h
> > @@ -25,9 +25,10 @@ struct regulator;
> >  struct isp_csiphy {
> >  	struct isp_device *isp;
> >  	struct mutex mutex;	/* serialize csiphy configuration */
> > -	u8 phy_in_use;
> >  	struct isp_csi2_device *csi2;
> >  	struct regulator *vdd;
> > +	/* the entity for which the phy was acquired for */
> > +	struct media_entity *entity;
> >  
> >  	/* mem resources - enums as defined in enum isp_mem_resources */
> >  	unsigned int cfg_regs;
> > @@ -36,7 +37,8 @@ struct isp_csiphy {
> >  	u8 num_data_lanes;	/* number of CSI2 Data Lanes supported */
> >  };
> >  
> > -int omap3isp_csiphy_acquire(struct isp_csiphy *phy);
> > +int omap3isp_csiphy_acquire(struct isp_csiphy *phy,
> > +			    struct media_entity *entity);
> >  void omap3isp_csiphy_release(struct isp_csiphy *phy);
> >  int omap3isp_csiphy_init(struct isp_device *isp);
> >  void omap3isp_csiphy_cleanup(struct isp_device *isp);
> 
> -- 
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html



-- 
Sakari Ailus
e-mail: sakari.ailus@iki.fi	XMPP: sailus@retiisi.org.uk

Re: [PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Sakari Ailus]

Hi Laurent,

On Fri, Aug 11, 2017 at 02:32:00PM +0300, Laurent Pinchart wrote:
> Hi Sakari,
> 
> Thank you for the patch.
> 
> On Friday 11 Aug 2017 12:57:09 Sakari Ailus wrote:
> > If the CSI-2 receiver isn't part of the pipeline (or isn't there to begin
> > with), skip its initialisation.
> 
> I don't think the commit message really describes the patch.
> 
> > Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> > Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on
> > Beagleboard-xM + MPT9P031 Acked-by: Pavel Machek <pavel@ucw.cz>
> > ---
> > since v1.1:
> > 
> > - Assign phy->entity before calling omap3isp_csiphy_config(), for
> >   phy->entity is used by omap3isp_csiphy_config(). (Thanks to Pavel for
> >   spotting this.)
> > 
> >  drivers/media/platform/omap3isp/ispccp2.c   |  2 +-
> >  drivers/media/platform/omap3isp/ispcsi2.c   |  4 +--
> >  drivers/media/platform/omap3isp/ispcsiphy.c | 38 ++++++++++++--------------
> >  drivers/media/platform/omap3isp/ispcsiphy.h |  6 +++--
> >  4 files changed, 27 insertions(+), 23 deletions(-)
> > 
> > diff --git a/drivers/media/platform/omap3isp/ispccp2.c
> > b/drivers/media/platform/omap3isp/ispccp2.c index
> > 47210b102bcb..3db8df09cd9a 100644
> > --- a/drivers/media/platform/omap3isp/ispccp2.c
> > +++ b/drivers/media/platform/omap3isp/ispccp2.c
> > @@ -841,7 +841,7 @@ static int ccp2_s_stream(struct v4l2_subdev *sd, int
> > enable) switch (enable) {
> >  	case ISP_PIPELINE_STREAM_CONTINUOUS:
> >  		if (ccp2->phy) {
> > -			ret = omap3isp_csiphy_acquire(ccp2->phy);
> > +			ret = omap3isp_csiphy_acquire(ccp2->phy, &sd->entity);
> >  			if (ret < 0)
> >  				return ret;
> >  		}
> > diff --git a/drivers/media/platform/omap3isp/ispcsi2.c
> > b/drivers/media/platform/omap3isp/ispcsi2.c index
> > 7dae2fe0d42d..3ec37fed710b 100644
> > --- a/drivers/media/platform/omap3isp/ispcsi2.c
> > +++ b/drivers/media/platform/omap3isp/ispcsi2.c
> > @@ -490,7 +490,7 @@ int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
> >  	if (!csi2->available)
> >  		return -ENODEV;
> > 
> > -	if (csi2->phy->phy_in_use)
> > +	if (csi2->phy->entity)
> >  		return -EBUSY;
> > 
> >  	isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
> > @@ -1053,7 +1053,7 @@ static int csi2_set_stream(struct v4l2_subdev *sd, int
> > enable)
> > 
> >  	switch (enable) {
> >  	case ISP_PIPELINE_STREAM_CONTINUOUS:
> > -		if (omap3isp_csiphy_acquire(csi2->phy) < 0)
> > +		if (omap3isp_csiphy_acquire(csi2->phy, &sd->entity) < 0)
> >  			return -ENODEV;
> >  		if (csi2->output & CSI2_OUTPUT_MEMORY)
> >  			omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
> > diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c
> > b/drivers/media/platform/omap3isp/ispcsiphy.c index
> > 2028bb519108..aedd88fa8246 100644
> > --- a/drivers/media/platform/omap3isp/ispcsiphy.c
> > +++ b/drivers/media/platform/omap3isp/ispcsiphy.c
> > @@ -164,15 +164,18 @@ static int csiphy_set_power(struct isp_csiphy *phy,
> > u32 power)
> > 
> >  static int omap3isp_csiphy_config(struct isp_csiphy *phy)
> >  {
> > -	struct isp_csi2_device *csi2 = phy->csi2;
> > -	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
> > -	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> > +	struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
> > +	struct isp_bus_cfg *buscfg;
> >  	struct isp_csiphy_lanes_cfg *lanes;
> >  	int csi2_ddrclk_khz;
> >  	unsigned int num_data_lanes, used_lanes = 0;
> >  	unsigned int i;
> >  	u32 reg;
> > 
> > +	if (!pipe)
> > +		return -EBUSY;
> 
> When can this happen ?

It shouldn't. Just in case, it'd be a driver bug if it did. What would you
think of adding WARN_ON() here?

> 
> > +	buscfg = pipe->external->host_priv;
> >  	if (!buscfg) {
> >  		struct isp_async_subdev *isd =
> >  			container_of(pipe->external->asd,
> > @@ -222,7 +225,7 @@ static int omap3isp_csiphy_config(struct isp_csiphy
> > *phy) csi2_ddrclk_khz = pipe->external_rate / 1000
> >  		/ (2 * hweight32(used_lanes)) * pipe->external_width;
> > 
> > -	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG0);
> > +	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG0);
> > 
> >  	reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK |
> >  		 ISPCSIPHY_REG0_THS_SETTLE_MASK);
> > @@ -233,9 +236,9 @@ static int omap3isp_csiphy_config(struct isp_csiphy
> > *phy) reg |= (DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3)
> >  		<< ISPCSIPHY_REG0_THS_SETTLE_SHIFT;
> > 
> > -	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
> > +	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
> > 
> > -	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG1);
> > +	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG1);
> > 
> >  	reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK |
> >  		 ISPCSIPHY_REG1_TCLK_MISS_MASK |
> > @@ -244,10 +247,10 @@ static int omap3isp_csiphy_config(struct isp_csiphy
> > *phy) reg |= TCLK_MISS << ISPCSIPHY_REG1_TCLK_MISS_SHIFT;
> >  	reg |= TCLK_SETTLE << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT;
> > 
> > -	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
> > +	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
> > 
> >  	/* DPHY lane configuration */
> > -	reg = isp_reg_readl(csi2->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
> > +	reg = isp_reg_readl(phy->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
> > 
> >  	for (i = 0; i < num_data_lanes; i++) {
> >  		reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) |
> > @@ -263,12 +266,12 @@ static int omap3isp_csiphy_config(struct isp_csiphy
> > *phy) reg |= lanes->clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT;
> >  	reg |= lanes->clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT;
> > 
> > -	isp_reg_writel(csi2->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
> > +	isp_reg_writel(phy->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
> > 
> >  	return 0;
> >  }
> > 
> > -int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> > +int omap3isp_csiphy_acquire(struct isp_csiphy *phy, struct media_entity
> > *entity) {
> >  	int rval;
> > 
> > @@ -288,6 +291,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> >  	if (rval < 0)
> >  		goto done;
> > 
> > +	phy->entity = entity;
> > +
> >  	rval = omap3isp_csiphy_config(phy);
> >  	if (rval < 0)
> >  		goto done;
> > @@ -301,10 +306,9 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> > 
> >  		csiphy_power_autoswitch_enable(phy, true);
> >  	}
> > -
> > -	phy->phy_in_use = 1;
> > -
> >  done:
> > +	phy->entity = NULL;
> > +
> 
> Did you really mean to release the PHY here ?

Yes, indeed. Fixed.

> 
> >  	mutex_unlock(&phy->mutex);
> >  	return rval;
> >  }
> > @@ -312,10 +316,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
> >  void omap3isp_csiphy_release(struct isp_csiphy *phy)
> >  {
> >  	mutex_lock(&phy->mutex);
> > -	if (phy->phy_in_use) {
> > -		struct isp_csi2_device *csi2 = phy->csi2;
> > -		struct isp_pipeline *pipe =
> > -			to_isp_pipeline(&csi2->subdev.entity);
> > +	if (phy->entity && phy->entity->pipe) {
> > +		struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
> >  		struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> > 
> >  		csiphy_routing_cfg(phy, buscfg->interface, false,
> > @@ -325,7 +327,7 @@ void omap3isp_csiphy_release(struct isp_csiphy *phy)
> >  			csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_OFF);
> >  		}
> >  		regulator_disable(phy->vdd);
> > -		phy->phy_in_use = 0;
> > +		phy->entity = NULL;
> >  	}
> >  	mutex_unlock(&phy->mutex);
> >  }
> > diff --git a/drivers/media/platform/omap3isp/ispcsiphy.h
> > b/drivers/media/platform/omap3isp/ispcsiphy.h index
> > 978ca5c80a6c..cffda0265767 100644
> > --- a/drivers/media/platform/omap3isp/ispcsiphy.h
> > +++ b/drivers/media/platform/omap3isp/ispcsiphy.h
> > @@ -25,9 +25,10 @@ struct regulator;
> >  struct isp_csiphy {
> >  	struct isp_device *isp;
> >  	struct mutex mutex;	/* serialize csiphy configuration */
> > -	u8 phy_in_use;
> >  	struct isp_csi2_device *csi2;
> >  	struct regulator *vdd;
> > +	/* the entity for which the phy was acquired for */
> 
> Either "the entity that the phy was acquired for", or "the entity for which 
> the phy was acquired". Or you could rename the field to owner and document it 
> as "the entity owning the PHY", I think that would be more explicit in the 
> code.

Yes, there's one "for" too much. I'll drop the latter.

> 
> > +	struct media_entity *entity;
> > 
> >  	/* mem resources - enums as defined in enum isp_mem_resources */
> >  	unsigned int cfg_regs;
> > @@ -36,7 +37,8 @@ struct isp_csiphy {
> >  	u8 num_data_lanes;	/* number of CSI2 Data Lanes supported */
> >  };
> > 
> > -int omap3isp_csiphy_acquire(struct isp_csiphy *phy);
> > +int omap3isp_csiphy_acquire(struct isp_csiphy *phy,
> > +			    struct media_entity *entity);
> >  void omap3isp_csiphy_release(struct isp_csiphy *phy);
> >  int omap3isp_csiphy_init(struct isp_device *isp);
> >  void omap3isp_csiphy_cleanup(struct isp_device *isp);
> 

-- 
Sakari Ailus
e-mail: sakari.ailus@iki.fi

Re: [PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Sakari Ailus]

On Fri, Aug 11, 2017 at 02:32:00PM +0300, Laurent Pinchart wrote:
> > +	if (!pipe)
> > +		return -EBUSY;
> 
> When can this happen ?

And this test should be for phy->entity instead.

-- 
Sakari Ailus
e-mail: sakari.ailus@iki.fi

Re: [PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Laurent Pinchart]

Hi Sakari,

On Monday 14 Aug 2017 13:53:27 Sakari Ailus wrote:
> On Fri, Aug 11, 2017 at 02:32:00PM +0300, Laurent Pinchart wrote:
> > On Friday 11 Aug 2017 12:57:09 Sakari Ailus wrote:
> >> If the CSI-2 receiver isn't part of the pipeline (or isn't there to
> >> begin with), skip its initialisation.
> > 
> > I don't think the commit message really describes the patch.
> > 
> >> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> >> Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on
> >> Beagleboard-xM + MPT9P031 Acked-by: Pavel Machek <pavel@ucw.cz>
> >> ---
> >> since v1.1:
> >> 
> >> - Assign phy->entity before calling omap3isp_csiphy_config(), for
> >> 
> >>   phy->entity is used by omap3isp_csiphy_config(). (Thanks to Pavel for
> >>   spotting this.)
> >>  
> >>  drivers/media/platform/omap3isp/ispccp2.c   |  2 +-
> >>  drivers/media/platform/omap3isp/ispcsi2.c   |  4 +--
> >>  drivers/media/platform/omap3isp/ispcsiphy.c | 38 ++++++++++------------
> >>  drivers/media/platform/omap3isp/ispcsiphy.h |  6 +++--
> >>  4 files changed, 27 insertions(+), 23 deletions(-)
> >> 

[snip]

> >> diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c
> >> b/drivers/media/platform/omap3isp/ispcsiphy.c index
> >> 2028bb519108..aedd88fa8246 100644
> >> --- a/drivers/media/platform/omap3isp/ispcsiphy.c
> >> +++ b/drivers/media/platform/omap3isp/ispcsiphy.c
> >> @@ -164,15 +164,18 @@ static int csiphy_set_power(struct isp_csiphy
> >> *phy, u32 power)
> >> 
> >>  static int omap3isp_csiphy_config(struct isp_csiphy *phy)
> >>  {
> >> -	struct isp_csi2_device *csi2 = phy->csi2;
> >> -	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
> >> -	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> >> +	struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
> >> +	struct isp_bus_cfg *buscfg;
> >>  	struct isp_csiphy_lanes_cfg *lanes;
> >>  	int csi2_ddrclk_khz;
> >>  	unsigned int num_data_lanes, used_lanes = 0;
> >>  	unsigned int i;
> >>  	u32 reg;
> >> 
> >> +	if (!pipe)
> >> +		return -EBUSY;
> > 
> > When can this happen ?
> 
> It shouldn't. Just in case, it'd be a driver bug if it did. What would you
> think of adding WARN_ON() here?

I throw WARN_ON()s in when I believe that driver could get it wrong. In this 
particular case, given that this function is called from .s_stream() handlers 
only, I wonder if the check makes sense at all.

> >> +	buscfg = pipe->external->host_priv;
> >>  	if (!buscfg) {
> >>  		struct isp_async_subdev *isd =
> >>  			container_of(pipe->external->asd,

[snip]

-- 
Regards,

Laurent Pinchart

Re: [PATCH v1.2 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Sakari Ailus]

On Mon, Aug 14, 2017 at 04:33:39PM +0300, Laurent Pinchart wrote:
> Hi Sakari,
> 
> On Monday 14 Aug 2017 13:53:27 Sakari Ailus wrote:
> > On Fri, Aug 11, 2017 at 02:32:00PM +0300, Laurent Pinchart wrote:
> > > On Friday 11 Aug 2017 12:57:09 Sakari Ailus wrote:
> > >> If the CSI-2 receiver isn't part of the pipeline (or isn't there to
> > >> begin with), skip its initialisation.
> > > 
> > > I don't think the commit message really describes the patch.
> > > 
> > >> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> > >> Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on
> > >> Beagleboard-xM + MPT9P031 Acked-by: Pavel Machek <pavel@ucw.cz>
> > >> ---
> > >> since v1.1:
> > >> 
> > >> - Assign phy->entity before calling omap3isp_csiphy_config(), for
> > >> 
> > >>   phy->entity is used by omap3isp_csiphy_config(). (Thanks to Pavel for
> > >>   spotting this.)
> > >>  
> > >>  drivers/media/platform/omap3isp/ispccp2.c   |  2 +-
> > >>  drivers/media/platform/omap3isp/ispcsi2.c   |  4 +--
> > >>  drivers/media/platform/omap3isp/ispcsiphy.c | 38 ++++++++++------------
> > >>  drivers/media/platform/omap3isp/ispcsiphy.h |  6 +++--
> > >>  4 files changed, 27 insertions(+), 23 deletions(-)
> > >> 
> 
> [snip]
> 
> > >> diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c
> > >> b/drivers/media/platform/omap3isp/ispcsiphy.c index
> > >> 2028bb519108..aedd88fa8246 100644
> > >> --- a/drivers/media/platform/omap3isp/ispcsiphy.c
> > >> +++ b/drivers/media/platform/omap3isp/ispcsiphy.c
> > >> @@ -164,15 +164,18 @@ static int csiphy_set_power(struct isp_csiphy
> > >> *phy, u32 power)
> > >> 
> > >>  static int omap3isp_csiphy_config(struct isp_csiphy *phy)
> > >>  {
> > >> -	struct isp_csi2_device *csi2 = phy->csi2;
> > >> -	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
> > >> -	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
> > >> +	struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
> > >> +	struct isp_bus_cfg *buscfg;
> > >>  	struct isp_csiphy_lanes_cfg *lanes;
> > >>  	int csi2_ddrclk_khz;
> > >>  	unsigned int num_data_lanes, used_lanes = 0;
> > >>  	unsigned int i;
> > >>  	u32 reg;
> > >> 
> > >> +	if (!pipe)
> > >> +		return -EBUSY;
> > > 
> > > When can this happen ?
> > 
> > It shouldn't. Just in case, it'd be a driver bug if it did. What would you
> > think of adding WARN_ON() here?
> 
> I throw WARN_ON()s in when I believe that driver could get it wrong. In this 
> particular case, given that this function is called from .s_stream() handlers 
> only, I wonder if the check makes sense at all.

Yeah, makes sense; I'll drop it.

-- 
Sakari Ailus
e-mail: sakari.ailus@iki.fi

[PATCH v1.3 1/1] omap3isp: Skip CSI-2 receiver initialisation in CCP2 configuration

[Sakari Ailus]

If the CSI-2 receiver isn't part of the pipeline (or isn't there to begin
with), skip its initialisation.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # on Beagleboard-xM + MPT9P031
Acked-by: Pavel Machek <pavel@ucw.cz>
---
 drivers/media/platform/omap3isp/ispccp2.c   |  2 +-
 drivers/media/platform/omap3isp/ispcsi2.c   |  4 +--
 drivers/media/platform/omap3isp/ispcsiphy.c | 45 +++++++++++++----------------
 drivers/media/platform/omap3isp/ispcsiphy.h |  6 ++--
 4 files changed, 27 insertions(+), 30 deletions(-)

diff --git a/drivers/media/platform/omap3isp/ispccp2.c b/drivers/media/platform/omap3isp/ispccp2.c
index 47210b102bcb..3db8df09cd9a 100644
--- a/drivers/media/platform/omap3isp/ispccp2.c
+++ b/drivers/media/platform/omap3isp/ispccp2.c
@@ -841,7 +841,7 @@ static int ccp2_s_stream(struct v4l2_subdev *sd, int enable)
 	switch (enable) {
 	case ISP_PIPELINE_STREAM_CONTINUOUS:
 		if (ccp2->phy) {
-			ret = omap3isp_csiphy_acquire(ccp2->phy);
+			ret = omap3isp_csiphy_acquire(ccp2->phy, &sd->entity);
 			if (ret < 0)
 				return ret;
 		}
diff --git a/drivers/media/platform/omap3isp/ispcsi2.c b/drivers/media/platform/omap3isp/ispcsi2.c
index 7dae2fe0d42d..3ec37fed710b 100644
--- a/drivers/media/platform/omap3isp/ispcsi2.c
+++ b/drivers/media/platform/omap3isp/ispcsi2.c
@@ -490,7 +490,7 @@ int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
 	if (!csi2->available)
 		return -ENODEV;
 
-	if (csi2->phy->phy_in_use)
+	if (csi2->phy->entity)
 		return -EBUSY;
 
 	isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
@@ -1053,7 +1053,7 @@ static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
 
 	switch (enable) {
 	case ISP_PIPELINE_STREAM_CONTINUOUS:
-		if (omap3isp_csiphy_acquire(csi2->phy) < 0)
+		if (omap3isp_csiphy_acquire(csi2->phy, &sd->entity) < 0)
 			return -ENODEV;
 		if (csi2->output & CSI2_OUTPUT_MEMORY)
 			omap3isp_sbl_enable(isp, OMAP3_ISP_SBL_CSI2A_WRITE);
diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c
index 2028bb519108..7e2846c52bb2 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.c
+++ b/drivers/media/platform/omap3isp/ispcsiphy.c
@@ -164,22 +164,17 @@ static int csiphy_set_power(struct isp_csiphy *phy, u32 power)
 
 static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 {
-	struct isp_csi2_device *csi2 = phy->csi2;
-	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
-	struct isp_bus_cfg *buscfg = pipe->external->host_priv;
+	struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
+	struct isp_async_subdev *isd =
+		container_of(pipe->external->asd, struct isp_async_subdev, asd);
+	struct isp_bus_cfg *buscfg = pipe->external->host_priv ?
+		pipe->external->host_priv : &isd->bus;
 	struct isp_csiphy_lanes_cfg *lanes;
 	int csi2_ddrclk_khz;
 	unsigned int num_data_lanes, used_lanes = 0;
 	unsigned int i;
 	u32 reg;
 
-	if (!buscfg) {
-		struct isp_async_subdev *isd =
-			container_of(pipe->external->asd,
-				     struct isp_async_subdev, asd);
-		buscfg = &isd->bus;
-	}
-
 	if (buscfg->interface == ISP_INTERFACE_CCP2B_PHY1
 	    || buscfg->interface == ISP_INTERFACE_CCP2B_PHY2) {
 		lanes = &buscfg->bus.ccp2.lanecfg;
@@ -222,7 +217,7 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	csi2_ddrclk_khz = pipe->external_rate / 1000
 		/ (2 * hweight32(used_lanes)) * pipe->external_width;
 
-	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG0);
+	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG0);
 
 	reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK |
 		 ISPCSIPHY_REG0_THS_SETTLE_MASK);
@@ -233,9 +228,9 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	reg |= (DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3)
 		<< ISPCSIPHY_REG0_THS_SETTLE_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
+	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG0);
 
-	reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG1);
+	reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG1);
 
 	reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK |
 		 ISPCSIPHY_REG1_TCLK_MISS_MASK |
@@ -244,10 +239,10 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	reg |= TCLK_MISS << ISPCSIPHY_REG1_TCLK_MISS_SHIFT;
 	reg |= TCLK_SETTLE << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
+	isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1);
 
 	/* DPHY lane configuration */
-	reg = isp_reg_readl(csi2->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
+	reg = isp_reg_readl(phy->isp, phy->cfg_regs, ISPCSI2_PHY_CFG);
 
 	for (i = 0; i < num_data_lanes; i++) {
 		reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) |
@@ -263,12 +258,12 @@ static int omap3isp_csiphy_config(struct isp_csiphy *phy)
 	reg |= lanes->clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT;
 	reg |= lanes->clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT;
 
-	isp_reg_writel(csi2->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
+	isp_reg_writel(phy->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG);
 
 	return 0;
 }
 
-int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
+int omap3isp_csiphy_acquire(struct isp_csiphy *phy, struct media_entity *entity)
 {
 	int rval;
 
@@ -288,6 +283,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
 	if (rval < 0)
 		goto done;
 
+	phy->entity = entity;
+
 	rval = omap3isp_csiphy_config(phy);
 	if (rval < 0)
 		goto done;
@@ -301,10 +298,10 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
 
 		csiphy_power_autoswitch_enable(phy, true);
 	}
-
-	phy->phy_in_use = 1;
-
 done:
+	if (rval < 0)
+		phy->entity = NULL;
+
 	mutex_unlock(&phy->mutex);
 	return rval;
 }
@@ -312,10 +309,8 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy)
 void omap3isp_csiphy_release(struct isp_csiphy *phy)
 {
 	mutex_lock(&phy->mutex);
-	if (phy->phy_in_use) {
-		struct isp_csi2_device *csi2 = phy->csi2;
-		struct isp_pipeline *pipe =
-			to_isp_pipeline(&csi2->subdev.entity);
+	if (phy->entity && phy->entity->pipe) {
+		struct isp_pipeline *pipe = to_isp_pipeline(phy->entity);
 		struct isp_bus_cfg *buscfg = pipe->external->host_priv;
 
 		csiphy_routing_cfg(phy, buscfg->interface, false,
@@ -325,7 +320,7 @@ void omap3isp_csiphy_release(struct isp_csiphy *phy)
 			csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_OFF);
 		}
 		regulator_disable(phy->vdd);
-		phy->phy_in_use = 0;
+		phy->entity = NULL;
 	}
 	mutex_unlock(&phy->mutex);
 }
diff --git a/drivers/media/platform/omap3isp/ispcsiphy.h b/drivers/media/platform/omap3isp/ispcsiphy.h
index 978ca5c80a6c..d29e947a24ca 100644
--- a/drivers/media/platform/omap3isp/ispcsiphy.h
+++ b/drivers/media/platform/omap3isp/ispcsiphy.h
@@ -25,9 +25,10 @@ struct regulator;
 struct isp_csiphy {
 	struct isp_device *isp;
 	struct mutex mutex;	/* serialize csiphy configuration */
-	u8 phy_in_use;
 	struct isp_csi2_device *csi2;
 	struct regulator *vdd;
+	/* the entity for which the phy was acquired */
+	struct media_entity *entity;
 
 	/* mem resources - enums as defined in enum isp_mem_resources */
 	unsigned int cfg_regs;
@@ -36,7 +37,8 @@ struct isp_csiphy {
 	u8 num_data_lanes;	/* number of CSI2 Data Lanes supported */
 };
 
-int omap3isp_csiphy_acquire(struct isp_csiphy *phy);
+int omap3isp_csiphy_acquire(struct isp_csiphy *phy,
+			    struct media_entity *entity);
 void omap3isp_csiphy_release(struct isp_csiphy *phy);
 int omap3isp_csiphy_init(struct isp_device *isp);
 void omap3isp_csiphy_cleanup(struct isp_device *isp);
-- 
2.11.0