media: imx: imx8q: add imx8q vpu device driver

IMX8Q SoCs feature a powerful video processing unit able to decode many
foramts and encode H.264.

The vpu IP is amphion malone decoder and windsor encoder.
This Driver is for this IP that is based on the v4l2 mem2mem framework.

Supported SoCs are: IMX8QXP, IMX8QM

Signed-off-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Shijie Qin <shijie.qin@nxp.com>
Signed-off-by: Zhou Peng <eagle.zhou@nxp.com>

Documentation/userspace-api/media/v4l/vidioc-dqevent.rst

@@ -185,6 +185,18 @@ call.
     * - ``V4L2_EVENT_PRIVATE_START``
       - 0x08000000
       - Base event number for driver-private events.
+    * - ``V4L2_EVENT_CODEC_ERROR``
+      - 0x08000001
+      - This event is triggered when some error occurs inside the codec engine,
+    usually it can be replaced by a POLLERR event, but in some cases, the POLLERR
+    may cause the application to exit, but this event can allow the application to
+    handle the codec error without exiting.
+    * - ``V4L2_EVENT_SKIP``
+      - 0x08000002
+      - This event is triggered when one frame is decoded, but it won't be outputed
+    to the display. So the application can't get this frame, and the input frame count
+    is dismatch with the output frame count. And this evevt is telling the client to
+    handle this case.
 
 
 .. tabularcolumns:: |p{4.4cm}|p{4.4cm}|p{8.5cm}|

drivers/media/platform/Kconfig

@@ -200,6 +200,8 @@ config VIDEO_TI_CAL_MC
 
 endif # VIDEO_TI_CAL
 
+source "drivers/media/platform/imx/Kconfig"
+
 endif # V4L_PLATFORM_DRIVERS
 
 menuconfig V4L_MEM2MEM_DRIVERS

drivers/media/platform/Makefile

@@ -86,3 +86,5 @@ obj-$(CONFIG_VIDEO_QCOM_VENUS)		+= qcom/venus/
 obj-y					+= sunxi/
 
 obj-$(CONFIG_VIDEO_MESON_GE2D)		+= meson/ge2d/
+
+obj-y					+= imx/

drivers/media/platform/imx/Kconfig

@@ -0,0 +1,19 @@
+#
+# Codec configuration
+#
+
+config MXC_VPU_8Q
+	tristate "Support for MXC 8Q VPU(Video Processing Unit) Codec"
+	depends on ARCH_MXC
+	depends on MEDIA_SUPPORT
+	depends on VIDEO_DEV
+	depends on VIDEO_V4L2
+	select V4L2_MEM2MEM_DEV
+	select VIDEOBUF2_DMA_CONTIG
+	select VIDEOBUF2_VMALLOC
+	default y
+	help
+	  This is a V4L2 driver for NXP MXC 8Q video accelerator hardware.
+	  It accelerates encoding and decoding operations on
+	  various NXP SoCs.
+	  To compile this driver as a module choose m here.

drivers/media/platform/imx/Makefile

@@ -0,0 +1 @@
+obj-$(CONFIG_MXC_VPU_8Q) += vpu-8q/

drivers/media/platform/imx/vpu-8q/Makefile

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for NXP VPU driver
+
+vpu-8q-dev-objs += vpu_drv.o \
+			vpu_dev_imx8q.o
+
+vpu-8q-core-objs += vpu_core.o \
+			vpu_mbox.o \
+			vpu_v4l2.o \
+			vpu_helpers.o \
+			vpu_cmds.o \
+			vpu_msgs.o \
+			vpu_rpc.o \
+			vpu_imx8q.o \
+			vpu_windsor.o \
+			vpu_malone.o \
+			vpu_color.o \
+			vdec.o  \
+			venc.o \
+			vpu_dbg.o
+
+obj-$(CONFIG_MXC_VPU_8Q) += vpu-8q-dev.o
+obj-$(CONFIG_MXC_VPU_8Q) += vpu-8q-core.o