[PATCH v3 04/18] media: ipu-bridge: Allow building as module

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After commit f54eb0ac7c1a ("media: ipu3-cio2: rename cio2 bridge to ipu
bridge and move out of ipu3") the ipu-bridge code is always built in
even if all consumers are build as module.

Fix this by turning "config IPU_BRIDGE" into a pure library Kconfig
option (not user selectable, must be selected by consumers) and
re-introducing the CIO2_BRIDGE Kconfig bits in .../pci/intel/ipu3/Kconfig
which were dropped to still allow building ipu3-cio2 without ipu-bridge
support.

Fixes: f54eb0ac7c1a ("media: ipu3-cio2: rename cio2 bridge to ipu bridge and move out of ipu3")
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
 drivers/media/pci/intel/Kconfig      | 18 ++----------------
 drivers/media/pci/intel/ipu-bridge.c |  4 ++++
 drivers/media/pci/intel/ipu3/Kconfig | 20 ++++++++++++++++++++
 3 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/drivers/media/pci/intel/Kconfig b/drivers/media/pci/intel/Kconfig
index 64a29b0b7033..3179184d7616 100644
--- a/drivers/media/pci/intel/Kconfig
+++ b/drivers/media/pci/intel/Kconfig
@@ -1,21 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config IPU_BRIDGE
-	bool "Intel IPU Sensors Bridge"
-	depends on VIDEO_IPU3_CIO2 && ACPI
+	tristate
+	depends on ACPI
 	depends on I2C
-	help
-	  This extension provides an API for the Intel IPU driver to create
-	  connections to cameras that are hidden in the SSDB buffer in ACPI.
-	  It can be used to enable support for cameras in detachable / hybrid
-	  devices that ship with Windows.
-
-	  Say Y here if your device is a detachable / hybrid laptop that comes
-	  with Windows installed by the OEM, for example:
-
-		- Microsoft Surface models (except Surface Pro 3)
-		- The Lenovo Miix line (for example the 510, 520, 710 and 720)
-		- Dell 7285
-
-	  If in doubt, say N here.
 
 source "drivers/media/pci/intel/ipu3/Kconfig"
diff --git a/drivers/media/pci/intel/ipu-bridge.c b/drivers/media/pci/intel/ipu-bridge.c
index 1c88fd925a8b..97b544736af2 100644
--- a/drivers/media/pci/intel/ipu-bridge.c
+++ b/drivers/media/pci/intel/ipu-bridge.c
@@ -497,3 +497,7 @@ int ipu_bridge_init(struct pci_dev *ipu)
 	return ret;
 }
 EXPORT_SYMBOL_NS_GPL(ipu_bridge_init, INTEL_IPU_BRIDGE);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dan Scally <djrscally@xxxxxxxxx>");
+MODULE_DESCRIPTION("Intel IPU ACPI Sensors Bridge");
diff --git a/drivers/media/pci/intel/ipu3/Kconfig b/drivers/media/pci/intel/ipu3/Kconfig
index 9be06ee81ff0..0951545eab21 100644
--- a/drivers/media/pci/intel/ipu3/Kconfig
+++ b/drivers/media/pci/intel/ipu3/Kconfig
@@ -8,6 +8,7 @@ config VIDEO_IPU3_CIO2
 	select VIDEO_V4L2_SUBDEV_API
 	select V4L2_FWNODE
 	select VIDEOBUF2_DMA_SG
+	select IPU_BRIDGE if CIO2_BRIDGE
 
 	help
 	  This is the Intel IPU3 CIO2 CSI-2 receiver unit, found in Intel
@@ -17,3 +18,22 @@ config VIDEO_IPU3_CIO2
 	  Say Y or M here if you have a Skylake/Kaby Lake SoC with MIPI CSI-2
 	  connected camera.
 	  The module will be called ipu3-cio2.
+
+config CIO2_BRIDGE
+	bool "IPU3 CIO2 Sensors Bridge"
+	depends on VIDEO_IPU3_CIO2 && ACPI
+	depends on I2C
+	help
+	  This extension provides an API for the ipu3-cio2 driver to create
+	  connections to cameras that are hidden in the SSDB buffer in ACPI.
+	  It can be used to enable support for cameras in detachable / hybrid
+	  devices that ship with Windows.
+
+	  Say Y here if your device is a detachable / hybrid laptop that comes
+	  with Windows installed by the OEM, for example:
+
+		- Microsoft Surface models (except Surface Pro 3)
+		- The Lenovo Miix line (for example the 510, 520, 710 and 720)
+		- Dell 7285
+
+	  If in doubt, say N here.
-- 
2.41.0




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