[media] VPU: mediatek: support Mediatek VPU (3003a180) · Commits · e / devices / android_kernel_teracube_mt6765

drivers/media/platform/Kconfig

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	@@ -153,6 +153,19 @@ config VIDEO_CODA
	Coda is a range of video codec IPs that supports		Coda is a range of video codec IPs that supports
	H.264, MPEG-4, and other video formats.		H.264, MPEG-4, and other video formats.

			config VIDEO_MEDIATEK_VPU
			tristate "Mediatek Video Processor Unit"
			depends on VIDEO_DEV && VIDEO_V4L2
			depends on ARCH_MEDIATEK \|\| COMPILE_TEST
			---help---
			This driver provides downloading VPU firmware and
			communicating with VPU. This driver for hw video
			codec embedded in Mediatek's MT8173 SOCs. It is able
			to handle video decoding/encoding in a range of formats.

			To compile this driver as a module, choose M here: the
			module will be called mtk-vpu.

	config VIDEO_MEM2MEM_DEINTERLACE		config VIDEO_MEM2MEM_DEINTERLACE
	tristate "Deinterlace support"		tristate "Deinterlace support"
	depends on VIDEO_DEV && VIDEO_V4L2 && DMA_ENGINE		depends on VIDEO_DEV && VIDEO_V4L2 && DMA_ENGINE

drivers/media/platform/Makefile

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	@@ -58,3 +58,5 @@ obj-$(CONFIG_VIDEO_XILINX) += xilinx/
	obj-$(CONFIG_VIDEO_RCAR_VIN) += rcar-vin/		obj-$(CONFIG_VIDEO_RCAR_VIN) += rcar-vin/

	ccflags-y += -I$(srctree)/drivers/media/i2c		ccflags-y += -I$(srctree)/drivers/media/i2c

			obj-$(CONFIG_VIDEO_MEDIATEK_VPU) += mtk-vpu/

drivers/media/platform/mtk-vpu/Makefile

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			mtk-vpu-y += mtk_vpu.o

			obj-$(CONFIG_VIDEO_MEDIATEK_VPU) += mtk-vpu.o

drivers/media/platform/mtk-vpu/mtk_vpu.c

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drivers/media/platform/mtk-vpu/mtk_vpu.h

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			/*
			* Copyright (c) 2016 MediaTek Inc.
			* Author: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
			*
			* This program is free software; you can redistribute it and/or modify
			* it under the terms of the GNU General Public License version 2 as
			* published by the Free Software Foundation.
			*
			* This program is distributed in the hope that it will be useful,
			* but WITHOUT ANY WARRANTY; without even the implied warranty of
			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
			* GNU General Public License for more details.
			*/

			#ifndef _MTK_VPU_H
			#define _MTK_VPU_H

			#include <linux/platform_device.h>

			/**
			* VPU (video processor unit) is a tiny processor controlling video hardware
			* related to video codec, scaling and color format converting.
			* VPU interfaces with other blocks by share memory and interrupt.
			**/

			typedef void (ipi_handler_t) (void data,
			unsigned int len,
			void *priv);

			/**
			* enum ipi_id - the id of inter-processor interrupt
			*
			* @IPI_VPU_INIT: The interrupt from vpu is to notfiy kernel
			VPU initialization completed.
			IPI_VPU_INIT is sent from VPU when firmware is
			loaded. AP doesn't need to send IPI_VPU_INIT
			command to VPU.
			For other IPI below, AP should send the request
			to VPU to trigger the interrupt.
			* @IPI_VENC_H264: The interrupt from vpu is to notify kernel to
			handle H264 video encoder job, and vice versa.
			* @IPI_VENC_VP8: The interrupt fro vpu is to notify kernel to
			handle VP8 video encoder job,, and vice versa.
			* @IPI_MAX: The maximum IPI number
			*/

			enum ipi_id {
			IPI_VPU_INIT = 0,
			IPI_VENC_H264,
			IPI_VENC_VP8,
			IPI_MAX,
			};

			/**
			* enum rst_id - reset id to register reset function for VPU watchdog timeout
			*
			* @VPU_RST_ENC: encoder reset id
			* @VPU_RST_MAX: maximum reset id
			*/
			enum rst_id {
			VPU_RST_ENC,
			VPU_RST_MAX,
			};

			/**
			* vpu_ipi_register - register an ipi function
			*
			* @pdev: VPU platform device
			* @id: IPI ID
			* @handler: IPI handler
			* @name: IPI name
			* @priv: private data for IPI handler
			*
			* Register an ipi function to receive ipi interrupt from VPU.
			*
			* Return: Return 0 if ipi registers successfully, otherwise it is failed.
			*/
			int vpu_ipi_register(struct platform_device *pdev, enum ipi_id id,
			ipi_handler_t handler, const char name, void priv);

			/**
			* vpu_ipi_send - send data from AP to vpu.
			*
			* @pdev: VPU platform device
			* @id: IPI ID
			* @buf: the data buffer
			* @len: the data buffer length
			*
			* This function is thread-safe. When this function returns,
			* VPU has received the data and starts the processing.
			* When the processing completes, IPI handler registered
			* by vpu_ipi_register will be called in interrupt context.
			*
			* Return: Return 0 if sending data successfully, otherwise it is failed.
			**/
			int vpu_ipi_send(struct platform_device *pdev,
			enum ipi_id id, void *buf,
			unsigned int len);

			/**
			* vpu_get_plat_device - get VPU's platform device
			*
			* @pdev: the platform device of the module requesting VPU platform
			* device for using VPU API.
			*
			* Return: Return NULL if it is failed.
			* otherwise it is VPU's platform device
			**/
			struct platform_device vpu_get_plat_device(struct platform_device pdev);

			/**
			* vpu_wdt_reg_handler - register a VPU watchdog handler
			*
			* @pdev: VPU platform device
			* @vpu_wdt_reset_func: the callback reset function
			* @private_data: the private data for reset function
			* @rst_id: reset id
			*
			* Register a handler performing own tasks when vpu reset by watchdog
			*
			* Return: Return 0 if the handler is added successfully,
			* otherwise it is failed.
			*
			**/
			int vpu_wdt_reg_handler(struct platform_device *pdev,
			void vpu_wdt_reset_func(void *),
			void *priv, enum rst_id id);
			/**
			* vpu_get_venc_hw_capa - get video encoder hardware capability
			*
			* @pdev: VPU platform device
			*
			* Return: video encoder hardware capability
			**/
			unsigned int vpu_get_venc_hw_capa(struct platform_device *pdev);

			/**
			* vpu_load_firmware - download VPU firmware and boot it
			*
			* @pdev: VPU platform device
			*
			* Return: Return 0 if downloading firmware successfully,
			* otherwise it is failed
			**/
			int vpu_load_firmware(struct platform_device *pdev);

			/**
			* vpu_mapping_dm_addr - Mapping DTCM/DMEM to kernel virtual address
			*
			* @pdev: VPU platform device
			* @dmem_addr: VPU's data memory address
			*
			* Mapping the VPU's DTCM (Data Tightly-Coupled Memory) /
			* DMEM (Data Extended Memory) memory address to
			* kernel virtual address.
			*
			* Return: Return ERR_PTR(-EINVAL) if mapping failed,
			* otherwise the mapped kernel virtual address
			**/
			void vpu_mapping_dm_addr(struct platform_device pdev,
			u32 dtcm_dmem_addr);
			#endif /* _MTK_VPU_H */