[v5,1/4] libcamera: Create IPA by name
diff mbox series

Message ID 20260512175340.115153-2-johannes.goede@oss.qualcomm.com
State New
Headers show
Series
  • ipa: Allow IPA creation by name
Related show

Commit Message

Hans de Goede May 12, 2026, 5:53 p.m. UTC 
Currently createIPA() / IPAManager::module() assume that there is a 1:1
relationship between pipeline handlers and IPAs and IPA matching is done
based on matching the pipe to ipaModuleInfo.pipelineName[].

One way to allow using a single IPA with multiple pipelines would be to
allow the IPA to declare itself compatible with more than one pipeline,
turning ipaModuleInfo.pipelineName[] into e.g. a vector. But the way
ipaModuleInfo is loaded as an ELF symbol requires it to be a simple flat
C-struct.

Instead, move the IPA creation procedure to be name-based, introducing
a PipelineHandler::createIPA(name, minVer, maxVer) overload that allows
to specify the name of the IPA module to match. Pipeline handlers that
wants to use their name as matching criteria can continue doing so using
the already existing PipelineHandler::createIPA(minVer, maxVer) overload.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Tested-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
---
Changes in v5:
- Rebase on top of db998e618aaa ("libcamera: pipeline_handler: Add
  createIPA() function") which moved the createIPA() wrapper for
  pipeline-handlers into the PipelineHandler class

Changes in v4:
- Rebase, change author to Hans' new email address

Changes in v1 from Hans' original patch:
- Slightly different approach addressing the review comments on Hans' v1
  by creating an overload for PipelineHandler::createIPA() that allows
  pipelines to specify the IPA module name.
---
 include/libcamera/internal/ipa_manager.h      |  6 ++---
 include/libcamera/internal/ipa_module.h       |  4 +--
 include/libcamera/internal/pipeline_handler.h |  9 ++++++-
 src/libcamera/ipa_manager.cpp                 |  8 +++---
 src/libcamera/ipa_module.cpp                  | 14 +++++------
 src/libcamera/pipeline_handler.cpp            | 25 +++++++++++++++++--
 6 files changed, 47 insertions(+), 19 deletions(-)

Patch
diff mbox series 

diff --git a/include/libcamera/internal/ipa_manager.h b/include/libcamera/internal/ipa_manager.h
index aaa3ca37c..7ab193112 100644
--- a/include/libcamera/internal/ipa_manager.h
+++ b/include/libcamera/internal/ipa_manager.h
@@ -34,10 +34,10 @@  public:
 	~IPAManager();
 
 	template<typename T>
-	std::unique_ptr<T> createIPA(PipelineHandler *pipe, uint32_t minVersion,
+	std::unique_ptr<T> createIPA(const char *name, uint32_t minVersion,
 				     uint32_t maxVersion)
 	{
-		IPAModule *m = module(pipe, minVersion, maxVersion);
+		IPAModule *m = module(name, minVersion, maxVersion);
 		if (!m)
 			return nullptr;
 
@@ -68,7 +68,7 @@  private:
 		      std::vector<std::string> &files);
 	unsigned int addDir(const char *libDir, unsigned int maxDepth = 0);
 
-	IPAModule *module(PipelineHandler *pipe, uint32_t minVersion,
+	IPAModule *module(const char *name, uint32_t minVersion,
 			  uint32_t maxVersion);
 
 	bool isSignatureValid(IPAModule *ipa) const;
diff --git a/include/libcamera/internal/ipa_module.h b/include/libcamera/internal/ipa_module.h
index 15f19492c..a0a53764e 100644
--- a/include/libcamera/internal/ipa_module.h
+++ b/include/libcamera/internal/ipa_module.h
@@ -36,8 +36,8 @@  public:
 
 	IPAInterface *createInterface();
 
-	bool match(PipelineHandler *pipe,
-		   uint32_t minVersion, uint32_t maxVersion) const;
+	bool match(const char *name, uint32_t minVersion,
+		   uint32_t maxVersion) const;
 
 protected:
 	std::string logPrefix() const override;
diff --git a/include/libcamera/internal/pipeline_handler.h b/include/libcamera/internal/pipeline_handler.h
index 6922ce18e..b60c07b13 100644
--- a/include/libcamera/internal/pipeline_handler.h
+++ b/include/libcamera/internal/pipeline_handler.h
@@ -76,7 +76,14 @@  public:
 	std::unique_ptr<T> createIPA(uint32_t minVersion, uint32_t maxVersion)
 	{
 		IPAManager *ipaManager = manager_->_d()->ipaManager();
-		return ipaManager->createIPA<T>(this, minVersion, maxVersion);
+		return ipaManager->createIPA<T>(name_, minVersion, maxVersion);
+	}
+
+	template<typename T>
+	std::unique_ptr<T> createIPA(const char *ipaName, uint32_t minVersion, uint32_t maxVersion)
+	{
+		IPAManager *ipaManager = manager_->_d()->ipaManager();
+		return ipaManager->createIPA<T>(ipaName, minVersion, maxVersion);
 	}
 
 protected:
diff --git a/src/libcamera/ipa_manager.cpp b/src/libcamera/ipa_manager.cpp
index 41918e4c2..b709a024e 100644
--- a/src/libcamera/ipa_manager.cpp
+++ b/src/libcamera/ipa_manager.cpp
@@ -248,15 +248,15 @@  unsigned int IPAManager::addDir(const char *libDir, unsigned int maxDepth)
 
 /**
  * \brief Retrieve an IPA module that matches a given pipeline handler
- * \param[in] pipe The pipeline handler
+ * \param[in] name The IPA module string identifier
  * \param[in] minVersion Minimum acceptable version of IPA module
  * \param[in] maxVersion Maximum acceptable version of IPA module
  */
-IPAModule *IPAManager::module(PipelineHandler *pipe, uint32_t minVersion,
+IPAModule *IPAManager::module(const char *name, uint32_t minVersion,
 			      uint32_t maxVersion)
 {
 	for (const auto &module : modules_) {
-		if (module->match(pipe, minVersion, maxVersion))
+		if (module->match(name, minVersion, maxVersion))
 			return module.get();
 	}
 
@@ -266,7 +266,7 @@  IPAModule *IPAManager::module(PipelineHandler *pipe, uint32_t minVersion,
 /**
  * \fn IPAManager::createIPA()
  * \brief Create an IPA proxy that matches a given pipeline handler
- * \param[in] pipe The pipeline handler that wants a matching IPA proxy
+ * \param[in] name The IPA module name
  * \param[in] minVersion Minimum acceptable version of IPA module
  * \param[in] maxVersion Maximum acceptable version of IPA module
  *
diff --git a/src/libcamera/ipa_module.cpp b/src/libcamera/ipa_module.cpp
index e6ea61e44..c89887954 100644
--- a/src/libcamera/ipa_module.cpp
+++ b/src/libcamera/ipa_module.cpp
@@ -462,22 +462,22 @@  IPAInterface *IPAModule::createInterface()
 }
 
 /**
- * \brief Verify if the IPA module matches a given pipeline handler
- * \param[in] pipe Pipeline handler to match with
+ * \brief Verify if the IPA module matches a given name
+ * \param[in] name The IPA module name
  * \param[in] minVersion Minimum acceptable version of IPA module
  * \param[in] maxVersion Maximum acceptable version of IPA module
  *
- * This function checks if this IPA module matches the \a pipe pipeline handler,
+ * This function checks if this IPA module matches the requested \a name
  * and the input version range.
  *
- * \return True if the pipeline handler matches the IPA module, or false otherwise
+ * \return True if the IPA module matches, or false otherwise
  */
-bool IPAModule::match(PipelineHandler *pipe,
-		      uint32_t minVersion, uint32_t maxVersion) const
+bool IPAModule::match(const char *name, uint32_t minVersion,
+		      uint32_t maxVersion) const
 {
 	return info_.pipelineVersion >= minVersion &&
 	       info_.pipelineVersion <= maxVersion &&
-	       !strcmp(info_.pipelineName, pipe->name());
+	       !strcmp(info_.name, name);
 }
 
 std::string IPAModule::logPrefix() const
diff --git a/src/libcamera/pipeline_handler.cpp b/src/libcamera/pipeline_handler.cpp
index e7145c1d4..25fc11989 100644
--- a/src/libcamera/pipeline_handler.cpp
+++ b/src/libcamera/pipeline_handler.cpp
@@ -836,11 +836,32 @@  void PipelineHandler::disconnect()
  */
 
 /**
- * \fn PipelineHandler::createIPA()
- * \brief Create an IPA proxy that matches this pipeline handler
+ * \fn PipelineHandler::createIPA(const char *ipaName, uint32_t minVersion, uint32_t maxVersion)
+ * \brief Create an IPA proxy that matches the requested name and version
+ * \param[in] ipaName The IPA module name
  * \param[in] minVersion Minimum acceptable version of IPA module
  * \param[in] maxVersion Maximum acceptable version of IPA module
  *
+ * Create an IPA module using \a ipaName as the matching identifier. This
+ * overload allows pipeline handlers to create an IPA module by specifying its
+ * name instead of relying on the fact that the IPA module matches the pipeline
+ * handler's one.
+ *
+ * \return A newly created IPA proxy, or nullptr if no matching IPA module is
+ * found or if the IPA proxy fails to initialize
+ */
+
+/**
+ * \fn PipelineHandler::createIPA(uint32_t minVersion, uint32_t maxVersion)
+ * \brief Create an IPA proxy that matches the pipeline handler name and the
+ * requested version
+ * \param[in] minVersion Minimum acceptable version of IPA module
+ * \param[in] maxVersion Maximum acceptable version of IPA module
+ *
+ * Create an IPA module using the pipeline handler name as the matching
+ * identifier. This overload allows pipeline handler to create an IPA module
+ * whose name matches the pipeline handler one.
+ *
  * \return A newly created IPA proxy, or nullptr if no matching IPA module is
  * found or if the IPA proxy fails to initialize
  */