[PATCH 0/2] Add a property to tell camera sensor orientation, support it in smiapp

[PATCH 0/2] Add a property to tell camera sensor orientation, support it in smiapp

[Sakari Ailus]

Hi,

The two patches add an "upside-down" property to the video bindings and
support for the property in the smiapp driver.

Sakari Ailus (2):
  dt-bindings: media: Add "upside-down" property to tell sensor
    orientation
  smiapp: Support the "upside-down" property

 Documentation/devicetree/bindings/media/i2c/nokia,smia.txt   | 2 ++
 Documentation/devicetree/bindings/media/video-interfaces.txt | 3 +++
 drivers/media/i2c/smiapp/smiapp-core.c                       | 3 +++
 3 files changed, 8 insertions(+)

-- 
2.11.0

[PATCH 1/2] dt-bindings: media: Add "upside-down" property to tell sensor orientation

[Sakari Ailus]

Camera sensors are occasionally mounted upside down. In order to use such
a sensor without having to turn every image upside down separately, most
camera sensors support reversing the readout order by setting both
horizontal and vertical flipping.

This patch adds a boolean property to tell a sensor is mounted upside
down.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 Documentation/devicetree/bindings/media/video-interfaces.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b/Documentation/devicetree/bindings/media/video-interfaces.txt
index 258b8dfddf48..2a3e4ec4ea27 100644
--- a/Documentation/devicetree/bindings/media/video-interfaces.txt
+++ b/Documentation/devicetree/bindings/media/video-interfaces.txt
@@ -85,6 +85,9 @@ Optional properties
 
 - lens-focus: A phandle to the node of the focus lens controller.
 
+- upside-down: The device, typically an image sensor, is mounted upside
+  down in the system.
+
 
 Optional endpoint properties
 ----------------------------
-- 
2.11.0

[PATCH 2/2] smiapp: Support the "upside-down" property

[Sakari Ailus]

Use the "upside-down" property to tell that the sensor is mounted upside
down. This reverses the behaviour of the VFLIP and HFLIP controls as well
as the pixel order.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 Documentation/devicetree/bindings/media/i2c/nokia,smia.txt | 2 ++
 drivers/media/i2c/smiapp/smiapp-core.c                     | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/nokia,smia.txt b/Documentation/devicetree/bindings/media/i2c/nokia,smia.txt
index 33f10a94c381..c824cd7025b3 100644
--- a/Documentation/devicetree/bindings/media/i2c/nokia,smia.txt
+++ b/Documentation/devicetree/bindings/media/i2c/nokia,smia.txt
@@ -29,6 +29,8 @@ Optional properties
 - reset-gpios: XSHUTDOWN GPIO
 - flash-leds: See ../video-interfaces.txt
 - lens-focus: See ../video-interfaces.txt
+- upside-down: A boolean property. Tells that the sensor is mounted upside
+  down.
 
 
 Endpoint node mandatory properties
diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c
index 3b7ace395ee6..5bc91b5a5998 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2801,6 +2801,9 @@ static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev)
 
 	dev_dbg(dev, "lanes %u\n", hwcfg->lanes);
 
+	if (fwnode_property_read_bool(fwnode, "upside-down"))
+		hwcfg->module_board_orient = SMIAPP_MODULE_BOARD_ORIENT_180;
+
 	/* NVM size is not mandatory */
 	fwnode_property_read_u32(fwnode, "nokia,nvm-size", &hwcfg->nvm_size);
 
-- 
2.11.0

Re: [PATCH 1/2] dt-bindings: media: Add "upside-down" property to tell sensor orientation

[Sebastian Reichel]

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Hi,

On Thu, May 03, 2018 at 12:31:14AM +0300, Sakari Ailus wrote:
> Camera sensors are occasionally mounted upside down. In order to use such
> a sensor without having to turn every image upside down separately, most
> camera sensors support reversing the readout order by setting both
> horizontal and vertical flipping.
> 
> This patch adds a boolean property to tell a sensor is mounted upside
> down.
> 
> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>

I think the DT binding should use a rotation property instead,
similar to the panel bindings:

Documentation/devicetree/bindings/display/panel/panel.txt

-- Sebastian

> ---
>  Documentation/devicetree/bindings/media/video-interfaces.txt | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b/Documentation/devicetree/bindings/media/video-interfaces.txt
> index 258b8dfddf48..2a3e4ec4ea27 100644
> --- a/Documentation/devicetree/bindings/media/video-interfaces.txt
> +++ b/Documentation/devicetree/bindings/media/video-interfaces.txt
> @@ -85,6 +85,9 @@ Optional properties
>  
>  - lens-focus: A phandle to the node of the focus lens controller.
>  
> +- upside-down: The device, typically an image sensor, is mounted upside
> +  down in the system.
> +
>  
>  Optional endpoint properties
>  ----------------------------
> -- 
> 2.11.0
> 

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Re: [PATCH 1/2] dt-bindings: media: Add "upside-down" property to tell sensor orientation

[Sakari Ailus]

Hi Sebastian,

On Thu, May 03, 2018 at 05:26:59PM +0200, Sebastian Reichel wrote:
> Hi,
> 
> On Thu, May 03, 2018 at 12:31:14AM +0300, Sakari Ailus wrote:
> > Camera sensors are occasionally mounted upside down. In order to use such
> > a sensor without having to turn every image upside down separately, most
> > camera sensors support reversing the readout order by setting both
> > horizontal and vertical flipping.
> > 
> > This patch adds a boolean property to tell a sensor is mounted upside
> > down.
> > 
> > Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> 
> I think the DT binding should use a rotation property instead,
> similar to the panel bindings:
> 
> Documentation/devicetree/bindings/display/panel/panel.txt

Good point. I was trying to find something relevant relating to e.g.
orientation but this one escaped me.

So... I'll abandon this patch, and use the "rotation" property instead.
I'll send v2 of the smiapp patch. I think I'll actually split that into
two, DT and driver changes.

-- 
Kind regards,

Sakari Ailus
sakari.ailus@linux.intel.com