media: vivid: Introduce VIDEO_VIVID_OSD

vivid-osd depends on CONFIG_FB, which can be a large dependency. Introduce
CONFIG_VIDEO_VIVID_OSD to control enabling support for testing output
overlay.

Suggested-by: Slawomir Rosek <srosek@google.com>
Co-developed-by: Slawomir Rosek <srosek@google.com>
Signed-off-by: Slawomir Rosek <srosek@google.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
[hverkuil: add newline to squash checkpatch warning]

Author: ribalda

drivers/media/test-drivers/vivid/Kconfig

@@ -1,9 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config VIDEO_VIVID
 	tristate "Virtual Video Test Driver"
-	depends on VIDEO_DEV && !SPARC32 && !SPARC64 && FB
+	depends on VIDEO_DEV && !SPARC32 && !SPARC64
 	depends on HAS_DMA
-	select FB_IOMEM_HELPERS
 	select FONT_SUPPORT
 	select FONT_8x16
 	select VIDEOBUF2_VMALLOC
@@ -31,6 +30,15 @@ config VIDEO_VIVID_CEC
 	  When selected the vivid module will emulate the optional
 	  HDMI CEC feature.
 
+config VIDEO_VIVID_OSD
+	bool "Enable Framebuffer for testing Output Overlay"
+	depends on VIDEO_VIVID && FB
+	default y
+	select FB_IOMEM_HELPERS
+	help
+	  When selected the vivid module will emulate a Framebuffer for
+	  testing Output Overlay.
+
 config VIDEO_VIVID_MAX_DEVS
 	int "Maximum number of devices"
 	depends on VIDEO_VIVID

drivers/media/test-drivers/vivid/Makefile

@@ -3,10 +3,13 @@ vivid-objs := vivid-core.o vivid-ctrls.o vivid-vid-common.o vivid-vbi-gen.o \
 		vivid-vid-cap.o vivid-vid-out.o vivid-kthread-cap.o vivid-kthread-out.o \
 		vivid-radio-rx.o vivid-radio-tx.o vivid-radio-common.o \
 		vivid-rds-gen.o vivid-sdr-cap.o vivid-vbi-cap.o vivid-vbi-out.o \
-		vivid-osd.o vivid-meta-cap.o vivid-meta-out.o \
+		vivid-meta-cap.o vivid-meta-out.o \
 		vivid-kthread-touch.o vivid-touch-cap.o
 ifeq ($(CONFIG_VIDEO_VIVID_CEC),y)
   vivid-objs += vivid-cec.o
 endif
+ifeq ($(CONFIG_VIDEO_VIVID_OSD),y)
+  vivid-objs += vivid-osd.o
+endif
 
 obj-$(CONFIG_VIDEO_VIVID) += vivid.o

drivers/media/test-drivers/vivid/vivid-core.c

@@ -125,7 +125,9 @@ MODULE_PARM_DESC(node_types, " node types, default is 0xe1d3d. Bitmask with the
 			     "\t\t    bit 8: Video Output node\n"
 			     "\t\t    bit 10-11: VBI Output node: 0 = none, 1 = raw vbi, 2 = sliced vbi, 3 = both\n"
 			     "\t\t    bit 12: Radio Transmitter node\n"
+#ifdef CONFIG_VIDEO_VIVID_OSD
 			     "\t\t    bit 16: Framebuffer for testing output overlays\n"
+#endif
 			     "\t\t    bit 17: Metadata Capture node\n"
 			     "\t\t    bit 18: Metadata Output node\n"
 			     "\t\t    bit 19: Touch Capture node\n");
@@ -1071,9 +1073,11 @@ static int vivid_detect_feature_set(struct vivid_dev *dev, int inst,
 	/* do we have a modulator? */
 	*has_modulator = dev->has_radio_tx;
 
+#ifdef CONFIG_VIDEO_VIVID_OSD
 	if (dev->has_vid_cap)
 		/* do we have a framebuffer for overlay testing? */
 		dev->has_fb = node_type & 0x10000;
+#endif
 
 	/* can we do crop/compose/scaling while capturing? */
 	if (no_error_inj && *ccs_cap == -1)

drivers/media/test-drivers/vivid/vivid-core.h

@@ -403,9 +403,11 @@ struct vivid_dev {
 	int				display_byte_stride;
 	int				bits_per_pixel;
 	int				bytes_per_pixel;
+#ifdef CONFIG_VIDEO_VIVID_OSD
 	struct fb_info			fb_info;
 	struct fb_var_screeninfo	fb_defined;
 	struct fb_fix_screeninfo	fb_fix;
+#endif
 
 	/* Error injection */
 	bool				disconnect_error;

drivers/media/test-drivers/vivid/vivid-osd.h

@@ -8,9 +8,23 @@
 #ifndef _VIVID_OSD_H_
 #define _VIVID_OSD_H_
 
+#ifdef CONFIG_VIDEO_VIVID_OSD
 int vivid_fb_init(struct vivid_dev *dev);
 void vivid_fb_deinit(struct vivid_dev *dev);
 void vivid_fb_clear(struct vivid_dev *dev);
 unsigned int vivid_fb_green_bits(struct vivid_dev *dev);
+#else
+static inline int vivid_fb_init(struct vivid_dev *dev)
+{
+	return -ENODEV;
+}
+
+static inline void vivid_fb_deinit(struct vivid_dev *dev) {}
+static inline void vivid_fb_clear(struct vivid_dev *dev) {}
+static inline unsigned int vivid_fb_green_bits(struct vivid_dev *dev)
+{
+	return 5;
+}
+#endif
 
 #endif