staging: vc04_services: Split vchiq-mmal into a module

In preparation for adding a video codec V4L2 module which also
wants to use vchiq-mmal functions, split it out into an
independent module.
The minimum number of changes have been made to achieve this
(eg straight moves where possible) so existing checkpatch
errors will still be present.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>

drivers/staging/vc04_services/Kconfig

@@ -22,6 +22,7 @@ config BCM2835_VCHIQ
 source "drivers/staging/vc04_services/bcm2835-audio/Kconfig"
 
 source "drivers/staging/vc04_services/bcm2835-camera/Kconfig"
+source "drivers/staging/vc04_services/vchiq-mmal/Kconfig"
 
 endif
 

drivers/staging/vc04_services/Makefile

@@ -12,6 +12,7 @@ vchiq-objs := \
 
 obj-$(CONFIG_SND_BCM2835)	+= bcm2835-audio/
 obj-$(CONFIG_VIDEO_BCM2835)	+= bcm2835-camera/
+obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += vchiq-mmal/
 
 ccflags-y += -Idrivers/staging/vc04_services -D__VCCOREVER__=0x04000000
 

drivers/staging/vc04_services/bcm2835-camera/Kconfig

@@ -3,7 +3,7 @@ config VIDEO_BCM2835
 	tristate "BCM2835 Camera"
 	depends on MEDIA_SUPPORT
 	depends on VIDEO_V4L2 && (ARCH_BCM2835 || COMPILE_TEST)
-	select BCM2835_VCHIQ
+	select BCM2835_VCHIQ_MMAL
 	select VIDEOBUF2_VMALLOC
 	select BTREE
 	help

drivers/staging/vc04_services/bcm2835-camera/Makefile

@@ -1,11 +1,12 @@
 # SPDX-License-Identifier: GPL-2.0
 bcm2835-v4l2-$(CONFIG_VIDEO_BCM2835) := \
 	bcm2835-camera.o \
-	controls.o \
-	mmal-vchiq.o
+	controls.o
 
 obj-$(CONFIG_VIDEO_BCM2835) += bcm2835-v4l2.o
 
 ccflags-y += \
 	-I $(srctree)/$(src)/.. \
+	-Idrivers/staging/vc04_services \
+	-Idrivers/staging/vc04_services/vchiq-mmal \
 	-D__VCCOREVER__=0x04000000

drivers/staging/vc04_services/vchiq-mmal/Kconfig

@@ -0,0 +1,7 @@
+config BCM2835_VCHIQ_MMAL
+	tristate "BCM2835 MMAL VCHIQ service"
+	depends on (ARCH_BCM2835 || COMPILE_TEST)
+	select BCM2835_VCHIQ
+	help
+	  Enables the MMAL API over VCHIQ as used for the
+	  majority of the multimedia services on VideoCore.

drivers/staging/vc04_services/vchiq-mmal/Makefile

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+bcm2835-mmal-vchiq-objs := mmal-vchiq.o
+
+obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += bcm2835-mmal-vchiq.o
+
+ccflags-y += \
+	-Idrivers/staging/vc04_services \
+	-D__VCCOREVER__=0x04000000

drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c

@@ -17,6 +17,7 @@
 
 #include <linux/errno.h>
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
@@ -31,6 +32,11 @@
 #define USE_VCHIQ_ARM
 #include "interface/vchi/vchi.h"
 
+MODULE_DESCRIPTION("BCM2835 MMAL VCHIQ interface");
+MODULE_AUTHOR("Dave Stevenson, <dave.stevenson@raspberrypi.org>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.0.1");
+
 /* maximum number of components supported */
 #define VCHIQ_MMAL_MAX_COMPONENTS 4
 
@@ -1396,6 +1402,7 @@ release_unlock:
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_port_set_format);
 
 int vchiq_mmal_port_parameter_set(struct vchiq_mmal_instance *instance,
 				  struct vchiq_mmal_port *port,
@@ -1412,6 +1419,7 @@ int vchiq_mmal_port_parameter_set(struct vchiq_mmal_instance *instance,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_port_parameter_set);
 
 int vchiq_mmal_port_parameter_get(struct vchiq_mmal_instance *instance,
 				  struct vchiq_mmal_port *port,
@@ -1428,6 +1436,7 @@ int vchiq_mmal_port_parameter_get(struct vchiq_mmal_instance *instance,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_port_parameter_get);
 
 /* enable a port
  *
@@ -1458,6 +1467,7 @@ unlock:
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_port_enable);
 
 int vchiq_mmal_port_disable(struct vchiq_mmal_instance *instance,
 			    struct vchiq_mmal_port *port)
@@ -1478,6 +1488,7 @@ int vchiq_mmal_port_disable(struct vchiq_mmal_instance *instance,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_port_disable);
 
 /* ports will be connected in a tunneled manner so data buffers
  * are not handled by client.
@@ -1565,6 +1576,7 @@ release_unlock:
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_port_connect_tunnel);
 
 int vchiq_mmal_submit_buffer(struct vchiq_mmal_instance *instance,
 			     struct vchiq_mmal_port *port,
@@ -1583,6 +1595,7 @@ int vchiq_mmal_submit_buffer(struct vchiq_mmal_instance *instance,
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_submit_buffer);
 
 int mmal_vchi_buffer_init(struct vchiq_mmal_instance *instance,
 			  struct mmal_buffer *buf)
@@ -1595,6 +1608,7 @@ int mmal_vchi_buffer_init(struct vchiq_mmal_instance *instance,
 	buf->msg_context = msg_context;
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mmal_vchi_buffer_init);
 
 int mmal_vchi_buffer_cleanup(struct mmal_buffer *buf)
 {
@@ -1606,6 +1620,7 @@ int mmal_vchi_buffer_cleanup(struct mmal_buffer *buf)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mmal_vchi_buffer_cleanup);
 
 /* Initialise a mmal component and its ports
  *
@@ -1693,6 +1708,7 @@ unlock:
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_component_init);
 
 /*
  * cause a mmal component to be destroyed
@@ -1714,6 +1730,7 @@ int vchiq_mmal_component_finalise(struct vchiq_mmal_instance *instance,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_component_finalise);
 
 /*
  * cause a mmal component to be enabled
@@ -1739,6 +1756,7 @@ int vchiq_mmal_component_enable(struct vchiq_mmal_instance *instance,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_component_enable);
 
 /*
  * cause a mmal component to be enabled
@@ -1764,6 +1782,7 @@ int vchiq_mmal_component_disable(struct vchiq_mmal_instance *instance,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_component_disable);
 
 int vchiq_mmal_version(struct vchiq_mmal_instance *instance,
 		       u32 *major_out, u32 *minor_out)
@@ -1779,6 +1798,7 @@ int vchiq_mmal_version(struct vchiq_mmal_instance *instance,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_version);
 
 int vchiq_mmal_finalise(struct vchiq_mmal_instance *instance)
 {
@@ -1809,6 +1829,7 @@ int vchiq_mmal_finalise(struct vchiq_mmal_instance *instance)
 
 	return status;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_finalise);
 
 int vchiq_mmal_init(struct vchiq_mmal_instance **out_instance)
 {
@@ -1889,3 +1910,4 @@ err_free:
 	kfree(instance);
 	return -ENODEV;
 }
+EXPORT_SYMBOL_GPL(vchiq_mmal_init);