BACKPORT: FROMLIST: virtio_video: Add the Virtio Video V4L2 driver

This adds a Virtio based video driver for video streaming device that operates input and output data buffers to share video devices with several guests. The current implementation consist of V4L2 based video driver supporting video functions of decoder and encoder. The device uses command structures to advertise and negotiate stream formats and controls. This allows the driver to modify the processing logic of the device on a per stream basis. Signed-off-by: Dmitry Sepp <dmitry.sepp@opensynergy.com> Signed-off-by: Kiran Pawar <Kiran.Pawar@opensynergy.com> Signed-off-by: Nikolay Martyanov <Nikolay.Martyanov@opensynergy.com> Signed-off-by: Samiullah Khawaja <samiullah.khawaja@opensynergy.com> (am from https://patchwork.linuxtv.org/patch/61717/) BUG=b:120456557 TEST=compile with VIRTIO_VIDEO enabled Fixes: * Fixed a typo in the commit message: "video_video" -> "virtio_video" * Fixed SPDX-License-Identifier in /include/uapi/linux/virtio_video.h * Removed vidioc_enum_fmt_vid_{cap, out}_mplane callbacks that were removed by https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e98b7b542a456582ea3029be857cc99a3b19bd5 Change-Id: I037b20a9faa1b31bb260cc2a0d57932e1979395e Signed-off-by: Keiichi Watanabe <keiichiw@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2066459 Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
dwlsalmeida · Mar 18, 2020 · bbca485 · bbca485
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commit bbca485
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diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig
@@ -170,6 +170,7 @@ source "drivers/media/pci/Kconfig"
 source "drivers/media/platform/Kconfig"
 source "drivers/media/mmc/Kconfig"
 source "drivers/media/radio/Kconfig"
+source "drivers/media/virtio/Kconfig"
 
 comment "Supported FireWire (IEEE 1394) Adapters"
 	depends on DVB_CORE && FIREWIRE

diff --git a/drivers/media/Makefile b/drivers/media/Makefile
@@ -25,6 +25,8 @@ obj-y += rc/
 
 obj-$(CONFIG_CEC_CORE) += cec/
 
+obj-$(CONFIG_VIRTIO_VIDEO)  += virtio/
+
 #
 # Finally, merge the drivers that require the core
 #

diff --git a/drivers/media/virtio/Kconfig b/drivers/media/virtio/Kconfig
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Video driver for virtio
+
+config VIRTIO_VIDEO
+	tristate "Virtio video V4L2 driver"
+	depends on VIRTIO && VIDEO_DEV && VIDEO_V4L2
+	select VIDEOBUF2_DMA_SG
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_MEM2MEM_DEV
+	help
+          This is the virtual video driver for virtio.
+          Say Y or M.
diff --git a/drivers/media/virtio/Makefile b/drivers/media/virtio/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-$(CONFIG_VIRTIO_VIDEO) += virtio-video.o
+
+virtio-video-objs := \
+    virtio_video_driver.o \
+    virtio_video_device.o \
+    virtio_video_vq.o \
+    virtio_video_dec.o \
+    virtio_video_enc.o \
+    virtio_video_caps.o \
+    virtio_video_helpers.o
-Original file line number
+Diff line change
@@ Expand Up / @@ -25,6 +25,8 @@ obj-y += rc/ @@
     obj-$(CONFIG_CEC_CORE) += cec/
+    obj-$(CONFIG_VIRTIO_VIDEO)  += virtio/
     #
     # Finally, merge the drivers that require the core
     #
@@ Expand Down @@