/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright ( c ) 2016 MediaTek Inc .
* Author : Andrew - CT Chen < andrew - ct . chen @ mediatek . com >
*/
#ifndef _MTK_VPU_H
#define _MTK_VPU_H
#include <linux/platform_device.h>
/**
* DOC : VPU
*
* 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_VDEC_H264 : The interrupt from vpu is to notify kernel to
* handle H264 vidoe decoder job , and vice versa .
* Decode output format is always MT21 no matter what
* the input format is .
* @ IPI_VDEC_VP8 : The interrupt from is to notify kernel to
* handle VP8 video decoder job , and vice versa .
* Decode output format is always MT21 no matter what
* the input format is .
* @ IPI_VDEC_VP9 : The interrupt from vpu is to notify kernel to
* handle VP9 video decoder job , and vice versa .
* Decode output format is always MT21 no matter what
* the input format is .
* @ 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_MDP : The interrupt from vpu is to notify kernel to
* handle MDP ( Media Data Path ) job , and vice versa .
* @ IPI_MAX : The maximum IPI number
*/
enum ipi_id {
IPI_VPU_INIT = 0 ,
IPI_VDEC_H264,
IPI_VDEC_VP8,
IPI_VDEC_VP9,
IPI_VENC_H264,
IPI_VENC_VP8,
IPI_MDP,
IPI_MAX,
};
/**
* enum rst_id - reset id to register reset function for VPU watchdog timeout
*
* @ VPU_RST_ENC : encoder reset id
* @ VPU_RST_DEC : decoder reset id
* @ VPU_RST_MDP : MDP ( Media Data Path ) reset id
* @ VPU_RST_MAX : maximum reset id
*/
enum rst_id {
VPU_RST_ENC,
VPU_RST_DEC,
VPU_RST_MDP,
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
* @ priv : the private data for reset function
* @ priv : the private data for reset function
* @ 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 *priv),
void *priv, enum rst_id id);
/**
* vpu_get_vdec_hw_capa - get video decoder hardware capability
*
* @ pdev : VPU platform device
*
* Return : video decoder hardware capability
**/
unsigned int vpu_get_vdec_hw_capa(struct platform_device *pdev);
/**
* 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
* @ dtcm_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 */
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