media: platform: Add Raspberry Pi HEVC decoder driver

The BCM2711 and BCM2712 SoCs used on Rapsberry Pi 4 and Raspberry
Pi 5 boards include an HEVC decoder block. Add a driver for it.

Signed-off-by: John Cox <john.cox@raspberrypi.com>
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

Author: John Cox

MAINTAINERS

@@ -19357,6 +19357,16 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/spi/raspberrypi,rp2040-gpio-bridge.yaml
 F:	drivers/spi/spi-rp2040-gpio-bridge.c
 
+RASPBERRY PI HEVC DECODER
+M:	John Cox <john.cox@raspberrypi.com>
+M:	Dom Cobley <dom@raspberrypi.com>
+M:	Dave Stevenson <dave.stevenson@raspberrypi.com>
+M:	Raspberry Pi Internal Kernel List <kernel-list@raspberrypi.com>
+L:	linux-media@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/media/raspberrypi,rpi_hevc_dec.yaml
+F:	drivers/media/platform/raspberrypi/hevc_dec
+
 RASPBERRY PI PISP BACK END
 M:	Jacopo Mondi <jacopo.mondi@ideasonboard.com>
 L:	Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>

drivers/media/platform/raspberrypi/Kconfig

@@ -2,5 +2,6 @@
 
 comment "Raspberry Pi media platform drivers"
 
+source "drivers/media/platform/raspberrypi/hevc_dec/Kconfig"
 source "drivers/media/platform/raspberrypi/pisp_be/Kconfig"
 source "drivers/media/platform/raspberrypi/rp1_cfe/Kconfig"

drivers/media/platform/raspberrypi/Makefile

@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 
+obj-y += hevc_dec/
 obj-y += pisp_be/
 obj-y += rp1_cfe/

drivers/media/platform/raspberrypi/hevc_dec/Kconfig

@@ -0,0 +1,17 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config VIDEO_RPI_HEVC_DEC
+	tristate "Rasperry Pi HEVC decoder"
+	depends on VIDEO_DEV && VIDEO_DEV
+	depends on OF
+	select MEDIA_CONTROLLER
+	select MEDIA_CONTROLLER_REQUEST_API
+	select VIDEOBUF2_DMA_CONTIG
+	select V4L2_MEM2MEM_DEV
+	help
+	  Support for the Raspberry Pi HEVC / H265 H/W decoder as a stateless
+	  V4L2 decoder device.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called rpi-hevc-dec.
+

drivers/media/platform/raspberrypi/hevc_dec/Makefile

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_VIDEO_RPI_HEVC_DEC) += rpi-hevc-dec.o
+
+rpi-hevc-dec-y = hevc_d.o hevc_d_video.o hevc_d_hw.o\
+		 hevc_d_h265.o