[v5,1/2] libcamera: Extend u32 control type
diff mbox series

Message ID 20241029161117.1197603-2-chenghaoyang@chromium.org
State Accepted
Commit 86902b39d7cd6701139f3de3a4ef4da57f2502ed
Headers show
Series
  • Add U16 & U32 support in controls
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Commit Message

Cheng-Hao Yang Oct. 29, 2024, 4:07 p.m. UTC 
From: Yudhistira Erlandinata <yerlandinata@chromium.org>

V4L2 Controls support a wide variety of types not yet supported by the
ControlValue type system.

Extend the libcamera ControlValue types to support an explicit 32 bit
unsigned integer type, and map that to the corresponding
V4L2_CTRL_TYPE_U32 type within the v4l2_device support class.

Signed-off-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
Co-developed-by: Harvey Yang <chenghaoyang@chromium.org>
Signed-off-by: Harvey Yang <chenghaoyang@chromium.org>
---
 include/libcamera/controls.h    |  7 ++++++
 src/libcamera/controls.cpp      | 12 ++++++++--
 src/libcamera/v4l2_device.cpp   | 39 +++++++++++++++++++++++++++-----
 test/controls/control_value.cpp | 40 +++++++++++++++++++++++++++++++++
 4 files changed, 91 insertions(+), 7 deletions(-)

Comments

Jacopo Mondi Nov. 28, 2024, 5:38 p.m. UTC | #1 
Hi Harvey

On Tue, Oct 29, 2024 at 04:07:12PM +0000, Harvey Yang wrote:
> From: Yudhistira Erlandinata <yerlandinata@chromium.org>
>
> V4L2 Controls support a wide variety of types not yet supported by the
> ControlValue type system.
>
> Extend the libcamera ControlValue types to support an explicit 32 bit
> unsigned integer type, and map that to the corresponding
> V4L2_CTRL_TYPE_U32 type within the v4l2_device support class.
>
> Signed-off-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
> Co-developed-by: Harvey Yang <chenghaoyang@chromium.org>
> Signed-off-by: Harvey Yang <chenghaoyang@chromium.org>

Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

Thanks
  j

> ---
>  include/libcamera/controls.h    |  7 ++++++
>  src/libcamera/controls.cpp      | 12 ++++++++--
>  src/libcamera/v4l2_device.cpp   | 39 +++++++++++++++++++++++++++-----
>  test/controls/control_value.cpp | 40 +++++++++++++++++++++++++++++++++
>  4 files changed, 91 insertions(+), 7 deletions(-)
>
> diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
> index ca60bbaca..6da8ad2c3 100644
> --- a/include/libcamera/controls.h
> +++ b/include/libcamera/controls.h
> @@ -29,6 +29,7 @@ enum ControlType {
>  	ControlTypeNone,
>  	ControlTypeBool,
>  	ControlTypeByte,
> +	ControlTypeUnsigned32,
>  	ControlTypeInteger32,
>  	ControlTypeInteger64,
>  	ControlTypeFloat,
> @@ -62,6 +63,12 @@ struct control_type<uint8_t> {
>  	static constexpr std::size_t size = 0;
>  };
>
> +template<>
> +struct control_type<uint32_t> {
> +	static constexpr ControlType value = ControlTypeUnsigned32;
> +	static constexpr std::size_t size = 0;
> +};
> +
>  template<>
>  struct control_type<int32_t> {
>  	static constexpr ControlType value = ControlTypeInteger32;
> diff --git a/src/libcamera/controls.cpp b/src/libcamera/controls.cpp
> index 62185d643..8ae295191 100644
> --- a/src/libcamera/controls.cpp
> +++ b/src/libcamera/controls.cpp
> @@ -54,6 +54,7 @@ static constexpr size_t ControlValueSize[] = {
>  	[ControlTypeNone]		= 0,
>  	[ControlTypeBool]		= sizeof(bool),
>  	[ControlTypeByte]		= sizeof(uint8_t),
> +	[ControlTypeUnsigned32]		= sizeof(uint32_t),
>  	[ControlTypeInteger32]		= sizeof(int32_t),
>  	[ControlTypeInteger64]		= sizeof(int64_t),
>  	[ControlTypeFloat]		= sizeof(float),
> @@ -74,10 +75,12 @@ static constexpr size_t ControlValueSize[] = {
>   * The control stores a boolean value
>   * \var ControlTypeByte
>   * The control stores a byte value as an unsigned 8-bit integer
> + * \var ControlTypeUnsigned32
> + * The control stores an unsigned 32-bit integer value
>   * \var ControlTypeInteger32
> - * The control stores a 32-bit integer value
> + * The control stores a signed 32-bit integer value
>   * \var ControlTypeInteger64
> - * The control stores a 64-bit integer value
> + * The control stores a signed 64-bit integer value
>   * \var ControlTypeFloat
>   * The control stores a 32-bit floating point value
>   * \var ControlTypeString
> @@ -230,6 +233,11 @@ std::string ControlValue::toString() const
>  			str += std::to_string(*value);
>  			break;
>  		}
> +		case ControlTypeUnsigned32: {
> +			const uint32_t *value = reinterpret_cast<const uint32_t *>(data);
> +			str += std::to_string(*value);
> +			break;
> +		}
>  		case ControlTypeInteger32: {
>  			const int32_t *value = reinterpret_cast<const int32_t *>(data);
>  			str += std::to_string(*value);
> diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
> index 68add4f2e..90fa6b278 100644
> --- a/src/libcamera/v4l2_device.cpp
> +++ b/src/libcamera/v4l2_device.cpp
> @@ -9,6 +9,7 @@
>
>  #include <fcntl.h>
>  #include <map>
> +#include <stdint.h>
>  #include <stdlib.h>
>  #include <string.h>
>  #include <sys/ioctl.h>
> @@ -204,10 +205,22 @@ ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids)
>
>  		if (info.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD) {
>  			ControlType type;
> +			ControlValue &value = ctrl.second;
> +			Span<uint8_t> data;
>
>  			switch (info.type) {
>  			case V4L2_CTRL_TYPE_U8:
>  				type = ControlTypeByte;
> +				value.reserve(type, true, info.elems);
> +				data = value.data();
> +				v4l2Ctrl.p_u8 = data.data();
> +				break;
> +
> +			case V4L2_CTRL_TYPE_U32:
> +				type = ControlTypeUnsigned32;
> +				value.reserve(type, true, info.elems);
> +				data = value.data();
> +				v4l2Ctrl.p_u32 = reinterpret_cast<uint32_t *>(data.data());
>  				break;
>
>  			default:
> @@ -217,11 +230,6 @@ ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids)
>  				return {};
>  			}
>
> -			ControlValue &value = ctrl.second;
> -			value.reserve(type, true, info.elems);
> -			Span<uint8_t> data = value.data();
> -
> -			v4l2Ctrl.p_u8 = data.data();
>  			v4l2Ctrl.size = data.size();
>  		}
>  	}
> @@ -299,6 +307,18 @@ int V4L2Device::setControls(ControlList *ctrls)
>  		/* Set the v4l2_ext_control value for the write operation. */
>  		ControlValue &value = ctrl->second;
>  		switch (iter->first->type()) {
> +		case ControlTypeUnsigned32: {
> +			if (value.isArray()) {
> +				Span<uint8_t> data = value.data();
> +				v4l2Ctrl.p_u32 = reinterpret_cast<uint32_t *>(data.data());
> +				v4l2Ctrl.size = data.size();
> +			} else {
> +				v4l2Ctrl.value = value.get<uint32_t>();
> +			}
> +
> +			break;
> +		}
> +
>  		case ControlTypeInteger32: {
>  			if (value.isArray()) {
>  				Span<uint8_t> data = value.data();
> @@ -488,6 +508,9 @@ ControlType V4L2Device::v4l2CtrlType(uint32_t ctrlType)
>  	case V4L2_CTRL_TYPE_BOOLEAN:
>  		return ControlTypeBool;
>
> +	case V4L2_CTRL_TYPE_U32:
> +		return ControlTypeUnsigned32;
> +
>  	case V4L2_CTRL_TYPE_INTEGER:
>  		return ControlTypeInteger32;
>
> @@ -536,6 +559,11 @@ std::optional<ControlInfo> V4L2Device::v4l2ControlInfo(const v4l2_query_ext_ctrl
>  				   static_cast<uint8_t>(ctrl.maximum),
>  				   static_cast<uint8_t>(ctrl.default_value));
>
> +	case V4L2_CTRL_TYPE_U32:
> +		return ControlInfo(static_cast<uint32_t>(ctrl.minimum),
> +				   static_cast<uint32_t>(ctrl.maximum),
> +				   static_cast<uint32_t>(ctrl.default_value));
> +
>  	case V4L2_CTRL_TYPE_BOOLEAN:
>  		return ControlInfo(static_cast<bool>(ctrl.minimum),
>  				   static_cast<bool>(ctrl.maximum),
> @@ -622,6 +650,7 @@ void V4L2Device::listControls()
>  		case V4L2_CTRL_TYPE_BITMASK:
>  		case V4L2_CTRL_TYPE_INTEGER_MENU:
>  		case V4L2_CTRL_TYPE_U8:
> +		case V4L2_CTRL_TYPE_U32:
>  			break;
>  		/* \todo Support other control types. */
>  		default:
> diff --git a/test/controls/control_value.cpp b/test/controls/control_value.cpp
> index 344107fae..6ca85b739 100644
> --- a/test/controls/control_value.cpp
> +++ b/test/controls/control_value.cpp
> @@ -109,6 +109,46 @@ protected:
>  			return TestFail;
>  		}
>
> +		/*
> +		 * Unsigned Integer32 type.
> +		 */
> +		value.set(static_cast<uint32_t>(42));
> +		if (value.isNone() || value.isArray() ||
> +		    value.type() != ControlTypeUnsigned32) {
> +			cerr << "Control type mismatch after setting to uint32_t" << endl;
> +			return TestFail;
> +		}
> +
> +		if (value.get<uint32_t>() != 42) {
> +			cerr << "Control value mismatch after setting to uint32_t" << endl;
> +			return TestFail;
> +		}
> +
> +		if (value.toString() != "42") {
> +			cerr << "Control string mismatch after setting to uint32_t" << endl;
> +			return TestFail;
> +		}
> +
> +		std::array<uint32_t, 4> uint32s{ 3, 14, 15, 9 };
> +		value.set(Span<uint32_t>(uint32s));
> +		if (value.isNone() || !value.isArray() ||
> +		    value.type() != ControlTypeUnsigned32) {
> +			cerr << "Control type mismatch after setting to uint32_t array" << endl;
> +			return TestFail;
> +		}
> +
> +		Span<const uint32_t> uint32sResult = value.get<Span<const uint32_t>>();
> +		if (uint32s.size() != uint32sResult.size() ||
> +		    !std::equal(uint32s.begin(), uint32s.end(), uint32sResult.begin())) {
> +			cerr << "Control value mismatch after setting to uint32_t array" << endl;
> +			return TestFail;
> +		}
> +
> +		if (value.toString() != "[ 3, 14, 15, 9 ]") {
> +			cerr << "Control string mismatch after setting to uint32_t array" << endl;
> +			return TestFail;
> +		}
> +
>  		/*
>  		 * Integer32 type.
>  		 */
> --
> 2.47.0.163.g1226f6d8fa-goog
>
Kieran Bingham Nov. 28, 2024, 5:45 p.m. UTC | #2 
Quoting Jacopo Mondi (2024-11-28 17:38:49)
> Hi Harvey
> 
> On Tue, Oct 29, 2024 at 04:07:12PM +0000, Harvey Yang wrote:
> > From: Yudhistira Erlandinata <yerlandinata@chromium.org>
> >
> > V4L2 Controls support a wide variety of types not yet supported by the
> > ControlValue type system.
> >
> > Extend the libcamera ControlValue types to support an explicit 32 bit
> > unsigned integer type, and map that to the corresponding
> > V4L2_CTRL_TYPE_U32 type within the v4l2_device support class.
> >
> > Signed-off-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
> > Co-developed-by: Harvey Yang <chenghaoyang@chromium.org>
> > Signed-off-by: Harvey Yang <chenghaoyang@chromium.org>
> 
> Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

Thanks,

I'm happy too - will merge if the CI succeeds ;-)


Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

> 
> Thanks
>   j
> 
> > ---
> >  include/libcamera/controls.h    |  7 ++++++
> >  src/libcamera/controls.cpp      | 12 ++++++++--
> >  src/libcamera/v4l2_device.cpp   | 39 +++++++++++++++++++++++++++-----
> >  test/controls/control_value.cpp | 40 +++++++++++++++++++++++++++++++++
> >  4 files changed, 91 insertions(+), 7 deletions(-)
> >
> > diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
> > index ca60bbaca..6da8ad2c3 100644
> > --- a/include/libcamera/controls.h
> > +++ b/include/libcamera/controls.h
> > @@ -29,6 +29,7 @@ enum ControlType {
> >       ControlTypeNone,
> >       ControlTypeBool,
> >       ControlTypeByte,
> > +     ControlTypeUnsigned32,
> >       ControlTypeInteger32,
> >       ControlTypeInteger64,
> >       ControlTypeFloat,
> > @@ -62,6 +63,12 @@ struct control_type<uint8_t> {
> >       static constexpr std::size_t size = 0;
> >  };
> >
> > +template<>
> > +struct control_type<uint32_t> {
> > +     static constexpr ControlType value = ControlTypeUnsigned32;
> > +     static constexpr std::size_t size = 0;
> > +};
> > +
> >  template<>
> >  struct control_type<int32_t> {
> >       static constexpr ControlType value = ControlTypeInteger32;
> > diff --git a/src/libcamera/controls.cpp b/src/libcamera/controls.cpp
> > index 62185d643..8ae295191 100644
> > --- a/src/libcamera/controls.cpp
> > +++ b/src/libcamera/controls.cpp
> > @@ -54,6 +54,7 @@ static constexpr size_t ControlValueSize[] = {
> >       [ControlTypeNone]               = 0,
> >       [ControlTypeBool]               = sizeof(bool),
> >       [ControlTypeByte]               = sizeof(uint8_t),
> > +     [ControlTypeUnsigned32]         = sizeof(uint32_t),
> >       [ControlTypeInteger32]          = sizeof(int32_t),
> >       [ControlTypeInteger64]          = sizeof(int64_t),
> >       [ControlTypeFloat]              = sizeof(float),
> > @@ -74,10 +75,12 @@ static constexpr size_t ControlValueSize[] = {
> >   * The control stores a boolean value
> >   * \var ControlTypeByte
> >   * The control stores a byte value as an unsigned 8-bit integer
> > + * \var ControlTypeUnsigned32
> > + * The control stores an unsigned 32-bit integer value
> >   * \var ControlTypeInteger32
> > - * The control stores a 32-bit integer value
> > + * The control stores a signed 32-bit integer value
> >   * \var ControlTypeInteger64
> > - * The control stores a 64-bit integer value
> > + * The control stores a signed 64-bit integer value
> >   * \var ControlTypeFloat
> >   * The control stores a 32-bit floating point value
> >   * \var ControlTypeString
> > @@ -230,6 +233,11 @@ std::string ControlValue::toString() const
> >                       str += std::to_string(*value);
> >                       break;
> >               }
> > +             case ControlTypeUnsigned32: {
> > +                     const uint32_t *value = reinterpret_cast<const uint32_t *>(data);
> > +                     str += std::to_string(*value);
> > +                     break;
> > +             }
> >               case ControlTypeInteger32: {
> >                       const int32_t *value = reinterpret_cast<const int32_t *>(data);
> >                       str += std::to_string(*value);
> > diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
> > index 68add4f2e..90fa6b278 100644
> > --- a/src/libcamera/v4l2_device.cpp
> > +++ b/src/libcamera/v4l2_device.cpp
> > @@ -9,6 +9,7 @@
> >
> >  #include <fcntl.h>
> >  #include <map>
> > +#include <stdint.h>
> >  #include <stdlib.h>
> >  #include <string.h>
> >  #include <sys/ioctl.h>
> > @@ -204,10 +205,22 @@ ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids)
> >
> >               if (info.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD) {
> >                       ControlType type;
> > +                     ControlValue &value = ctrl.second;
> > +                     Span<uint8_t> data;
> >
> >                       switch (info.type) {
> >                       case V4L2_CTRL_TYPE_U8:
> >                               type = ControlTypeByte;
> > +                             value.reserve(type, true, info.elems);
> > +                             data = value.data();
> > +                             v4l2Ctrl.p_u8 = data.data();
> > +                             break;
> > +
> > +                     case V4L2_CTRL_TYPE_U32:
> > +                             type = ControlTypeUnsigned32;
> > +                             value.reserve(type, true, info.elems);
> > +                             data = value.data();
> > +                             v4l2Ctrl.p_u32 = reinterpret_cast<uint32_t *>(data.data());
> >                               break;
> >
> >                       default:
> > @@ -217,11 +230,6 @@ ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids)
> >                               return {};
> >                       }
> >
> > -                     ControlValue &value = ctrl.second;
> > -                     value.reserve(type, true, info.elems);
> > -                     Span<uint8_t> data = value.data();
> > -
> > -                     v4l2Ctrl.p_u8 = data.data();
> >                       v4l2Ctrl.size = data.size();
> >               }
> >       }
> > @@ -299,6 +307,18 @@ int V4L2Device::setControls(ControlList *ctrls)
> >               /* Set the v4l2_ext_control value for the write operation. */
> >               ControlValue &value = ctrl->second;
> >               switch (iter->first->type()) {
> > +             case ControlTypeUnsigned32: {
> > +                     if (value.isArray()) {
> > +                             Span<uint8_t> data = value.data();
> > +                             v4l2Ctrl.p_u32 = reinterpret_cast<uint32_t *>(data.data());
> > +                             v4l2Ctrl.size = data.size();
> > +                     } else {
> > +                             v4l2Ctrl.value = value.get<uint32_t>();
> > +                     }
> > +
> > +                     break;
> > +             }
> > +
> >               case ControlTypeInteger32: {
> >                       if (value.isArray()) {
> >                               Span<uint8_t> data = value.data();
> > @@ -488,6 +508,9 @@ ControlType V4L2Device::v4l2CtrlType(uint32_t ctrlType)
> >       case V4L2_CTRL_TYPE_BOOLEAN:
> >               return ControlTypeBool;
> >
> > +     case V4L2_CTRL_TYPE_U32:
> > +             return ControlTypeUnsigned32;
> > +
> >       case V4L2_CTRL_TYPE_INTEGER:
> >               return ControlTypeInteger32;
> >
> > @@ -536,6 +559,11 @@ std::optional<ControlInfo> V4L2Device::v4l2ControlInfo(const v4l2_query_ext_ctrl
> >                                  static_cast<uint8_t>(ctrl.maximum),
> >                                  static_cast<uint8_t>(ctrl.default_value));
> >
> > +     case V4L2_CTRL_TYPE_U32:
> > +             return ControlInfo(static_cast<uint32_t>(ctrl.minimum),
> > +                                static_cast<uint32_t>(ctrl.maximum),
> > +                                static_cast<uint32_t>(ctrl.default_value));
> > +
> >       case V4L2_CTRL_TYPE_BOOLEAN:
> >               return ControlInfo(static_cast<bool>(ctrl.minimum),
> >                                  static_cast<bool>(ctrl.maximum),
> > @@ -622,6 +650,7 @@ void V4L2Device::listControls()
> >               case V4L2_CTRL_TYPE_BITMASK:
> >               case V4L2_CTRL_TYPE_INTEGER_MENU:
> >               case V4L2_CTRL_TYPE_U8:
> > +             case V4L2_CTRL_TYPE_U32:
> >                       break;
> >               /* \todo Support other control types. */
> >               default:
> > diff --git a/test/controls/control_value.cpp b/test/controls/control_value.cpp
> > index 344107fae..6ca85b739 100644
> > --- a/test/controls/control_value.cpp
> > +++ b/test/controls/control_value.cpp
> > @@ -109,6 +109,46 @@ protected:
> >                       return TestFail;
> >               }
> >
> > +             /*
> > +              * Unsigned Integer32 type.
> > +              */
> > +             value.set(static_cast<uint32_t>(42));
> > +             if (value.isNone() || value.isArray() ||
> > +                 value.type() != ControlTypeUnsigned32) {
> > +                     cerr << "Control type mismatch after setting to uint32_t" << endl;
> > +                     return TestFail;
> > +             }
> > +
> > +             if (value.get<uint32_t>() != 42) {
> > +                     cerr << "Control value mismatch after setting to uint32_t" << endl;
> > +                     return TestFail;
> > +             }
> > +
> > +             if (value.toString() != "42") {
> > +                     cerr << "Control string mismatch after setting to uint32_t" << endl;
> > +                     return TestFail;
> > +             }
> > +
> > +             std::array<uint32_t, 4> uint32s{ 3, 14, 15, 9 };
> > +             value.set(Span<uint32_t>(uint32s));
> > +             if (value.isNone() || !value.isArray() ||
> > +                 value.type() != ControlTypeUnsigned32) {
> > +                     cerr << "Control type mismatch after setting to uint32_t array" << endl;
> > +                     return TestFail;
> > +             }
> > +
> > +             Span<const uint32_t> uint32sResult = value.get<Span<const uint32_t>>();
> > +             if (uint32s.size() != uint32sResult.size() ||
> > +                 !std::equal(uint32s.begin(), uint32s.end(), uint32sResult.begin())) {
> > +                     cerr << "Control value mismatch after setting to uint32_t array" << endl;
> > +                     return TestFail;
> > +             }
> > +
> > +             if (value.toString() != "[ 3, 14, 15, 9 ]") {
> > +                     cerr << "Control string mismatch after setting to uint32_t array" << endl;
> > +                     return TestFail;
> > +             }
> > +
> >               /*
> >                * Integer32 type.
> >                */
> > --
> > 2.47.0.163.g1226f6d8fa-goog
> >

Patch
diff mbox series 

diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
index ca60bbaca..6da8ad2c3 100644
--- a/include/libcamera/controls.h
+++ b/include/libcamera/controls.h
@@ -29,6 +29,7 @@  enum ControlType {
 	ControlTypeNone,
 	ControlTypeBool,
 	ControlTypeByte,
+	ControlTypeUnsigned32,
 	ControlTypeInteger32,
 	ControlTypeInteger64,
 	ControlTypeFloat,
@@ -62,6 +63,12 @@  struct control_type<uint8_t> {
 	static constexpr std::size_t size = 0;
 };
 
+template<>
+struct control_type<uint32_t> {
+	static constexpr ControlType value = ControlTypeUnsigned32;
+	static constexpr std::size_t size = 0;
+};
+
 template<>
 struct control_type<int32_t> {
 	static constexpr ControlType value = ControlTypeInteger32;
diff --git a/src/libcamera/controls.cpp b/src/libcamera/controls.cpp
index 62185d643..8ae295191 100644
--- a/src/libcamera/controls.cpp
+++ b/src/libcamera/controls.cpp
@@ -54,6 +54,7 @@  static constexpr size_t ControlValueSize[] = {
 	[ControlTypeNone]		= 0,
 	[ControlTypeBool]		= sizeof(bool),
 	[ControlTypeByte]		= sizeof(uint8_t),
+	[ControlTypeUnsigned32]		= sizeof(uint32_t),
 	[ControlTypeInteger32]		= sizeof(int32_t),
 	[ControlTypeInteger64]		= sizeof(int64_t),
 	[ControlTypeFloat]		= sizeof(float),
@@ -74,10 +75,12 @@  static constexpr size_t ControlValueSize[] = {
  * The control stores a boolean value
  * \var ControlTypeByte
  * The control stores a byte value as an unsigned 8-bit integer
+ * \var ControlTypeUnsigned32
+ * The control stores an unsigned 32-bit integer value
  * \var ControlTypeInteger32
- * The control stores a 32-bit integer value
+ * The control stores a signed 32-bit integer value
  * \var ControlTypeInteger64
- * The control stores a 64-bit integer value
+ * The control stores a signed 64-bit integer value
  * \var ControlTypeFloat
  * The control stores a 32-bit floating point value
  * \var ControlTypeString
@@ -230,6 +233,11 @@  std::string ControlValue::toString() const
 			str += std::to_string(*value);
 			break;
 		}
+		case ControlTypeUnsigned32: {
+			const uint32_t *value = reinterpret_cast<const uint32_t *>(data);
+			str += std::to_string(*value);
+			break;
+		}
 		case ControlTypeInteger32: {
 			const int32_t *value = reinterpret_cast<const int32_t *>(data);
 			str += std::to_string(*value);
diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
index 68add4f2e..90fa6b278 100644
--- a/src/libcamera/v4l2_device.cpp
+++ b/src/libcamera/v4l2_device.cpp
@@ -9,6 +9,7 @@ 
 
 #include <fcntl.h>
 #include <map>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/ioctl.h>
@@ -204,10 +205,22 @@  ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids)
 
 		if (info.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD) {
 			ControlType type;
+			ControlValue &value = ctrl.second;
+			Span<uint8_t> data;
 
 			switch (info.type) {
 			case V4L2_CTRL_TYPE_U8:
 				type = ControlTypeByte;
+				value.reserve(type, true, info.elems);
+				data = value.data();
+				v4l2Ctrl.p_u8 = data.data();
+				break;
+
+			case V4L2_CTRL_TYPE_U32:
+				type = ControlTypeUnsigned32;
+				value.reserve(type, true, info.elems);
+				data = value.data();
+				v4l2Ctrl.p_u32 = reinterpret_cast<uint32_t *>(data.data());
 				break;
 
 			default:
@@ -217,11 +230,6 @@  ControlList V4L2Device::getControls(const std::vector<uint32_t> &ids)
 				return {};
 			}
 
-			ControlValue &value = ctrl.second;
-			value.reserve(type, true, info.elems);
-			Span<uint8_t> data = value.data();
-
-			v4l2Ctrl.p_u8 = data.data();
 			v4l2Ctrl.size = data.size();
 		}
 	}
@@ -299,6 +307,18 @@  int V4L2Device::setControls(ControlList *ctrls)
 		/* Set the v4l2_ext_control value for the write operation. */
 		ControlValue &value = ctrl->second;
 		switch (iter->first->type()) {
+		case ControlTypeUnsigned32: {
+			if (value.isArray()) {
+				Span<uint8_t> data = value.data();
+				v4l2Ctrl.p_u32 = reinterpret_cast<uint32_t *>(data.data());
+				v4l2Ctrl.size = data.size();
+			} else {
+				v4l2Ctrl.value = value.get<uint32_t>();
+			}
+
+			break;
+		}
+
 		case ControlTypeInteger32: {
 			if (value.isArray()) {
 				Span<uint8_t> data = value.data();
@@ -488,6 +508,9 @@  ControlType V4L2Device::v4l2CtrlType(uint32_t ctrlType)
 	case V4L2_CTRL_TYPE_BOOLEAN:
 		return ControlTypeBool;
 
+	case V4L2_CTRL_TYPE_U32:
+		return ControlTypeUnsigned32;
+
 	case V4L2_CTRL_TYPE_INTEGER:
 		return ControlTypeInteger32;
 
@@ -536,6 +559,11 @@  std::optional<ControlInfo> V4L2Device::v4l2ControlInfo(const v4l2_query_ext_ctrl
 				   static_cast<uint8_t>(ctrl.maximum),
 				   static_cast<uint8_t>(ctrl.default_value));
 
+	case V4L2_CTRL_TYPE_U32:
+		return ControlInfo(static_cast<uint32_t>(ctrl.minimum),
+				   static_cast<uint32_t>(ctrl.maximum),
+				   static_cast<uint32_t>(ctrl.default_value));
+
 	case V4L2_CTRL_TYPE_BOOLEAN:
 		return ControlInfo(static_cast<bool>(ctrl.minimum),
 				   static_cast<bool>(ctrl.maximum),
@@ -622,6 +650,7 @@  void V4L2Device::listControls()
 		case V4L2_CTRL_TYPE_BITMASK:
 		case V4L2_CTRL_TYPE_INTEGER_MENU:
 		case V4L2_CTRL_TYPE_U8:
+		case V4L2_CTRL_TYPE_U32:
 			break;
 		/* \todo Support other control types. */
 		default:
diff --git a/test/controls/control_value.cpp b/test/controls/control_value.cpp
index 344107fae..6ca85b739 100644
--- a/test/controls/control_value.cpp
+++ b/test/controls/control_value.cpp
@@ -109,6 +109,46 @@  protected:
 			return TestFail;
 		}
 
+		/*
+		 * Unsigned Integer32 type.
+		 */
+		value.set(static_cast<uint32_t>(42));
+		if (value.isNone() || value.isArray() ||
+		    value.type() != ControlTypeUnsigned32) {
+			cerr << "Control type mismatch after setting to uint32_t" << endl;
+			return TestFail;
+		}
+
+		if (value.get<uint32_t>() != 42) {
+			cerr << "Control value mismatch after setting to uint32_t" << endl;
+			return TestFail;
+		}
+
+		if (value.toString() != "42") {
+			cerr << "Control string mismatch after setting to uint32_t" << endl;
+			return TestFail;
+		}
+
+		std::array<uint32_t, 4> uint32s{ 3, 14, 15, 9 };
+		value.set(Span<uint32_t>(uint32s));
+		if (value.isNone() || !value.isArray() ||
+		    value.type() != ControlTypeUnsigned32) {
+			cerr << "Control type mismatch after setting to uint32_t array" << endl;
+			return TestFail;
+		}
+
+		Span<const uint32_t> uint32sResult = value.get<Span<const uint32_t>>();
+		if (uint32s.size() != uint32sResult.size() ||
+		    !std::equal(uint32s.begin(), uint32s.end(), uint32sResult.begin())) {
+			cerr << "Control value mismatch after setting to uint32_t array" << endl;
+			return TestFail;
+		}
+
+		if (value.toString() != "[ 3, 14, 15, 9 ]") {
+			cerr << "Control string mismatch after setting to uint32_t array" << endl;
+			return TestFail;
+		}
+
 		/*
 		 * Integer32 type.
 		 */