2 * Copyright (c) 2016 MediaTek Inc.
3 * Author: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
18 #include <linux/platform_device.h>
21 * VPU (video processor unit) is a tiny processor controlling video hardware
22 * related to video codec, scaling and color format converting.
23 * VPU interfaces with other blocks by share memory and interrupt.
26 typedef void (*ipi_handler_t) (void *data,
31 * enum ipi_id - the id of inter-processor interrupt
33 * @IPI_VPU_INIT: The interrupt from vpu is to notfiy kernel
34 * VPU initialization completed.
35 * IPI_VPU_INIT is sent from VPU when firmware is
36 * loaded. AP doesn't need to send IPI_VPU_INIT
38 * For other IPI below, AP should send the request
39 * to VPU to trigger the interrupt.
40 * @IPI_VDEC_H264: The interrupt from vpu is to notify kernel to
41 * handle H264 vidoe decoder job, and vice versa.
42 * Decode output format is always MT21 no matter what
43 * the input format is.
44 * @IPI_VDEC_VP8: The interrupt from is to notify kernel to
45 * handle VP8 video decoder job, and vice versa.
46 * Decode output format is always MT21 no matter what
47 * the input format is.
48 * @IPI_VDEC_VP9: The interrupt from vpu is to notify kernel to
49 * handle VP9 video decoder job, and vice versa.
50 * Decode output format is always MT21 no matter what
51 * the input format is.
52 * @IPI_VENC_H264: The interrupt from vpu is to notify kernel to
53 * handle H264 video encoder job, and vice versa.
54 * @IPI_VENC_VP8: The interrupt fro vpu is to notify kernel to
55 * handle VP8 video encoder job,, and vice versa.
56 * @IPI_MDP: The interrupt from vpu is to notify kernel to
57 * handle MDP (Media Data Path) job, and vice versa.
58 * @IPI_MAX: The maximum IPI number
73 * enum rst_id - reset id to register reset function for VPU watchdog timeout
75 * @VPU_RST_ENC: encoder reset id
76 * @VPU_RST_DEC: decoder reset id
77 * @VPU_RST_MDP: MDP (Media Data Path) reset id
78 * @VPU_RST_MAX: maximum reset id
88 * vpu_ipi_register - register an ipi function
90 * @pdev: VPU platform device
92 * @handler: IPI handler
94 * @priv: private data for IPI handler
96 * Register an ipi function to receive ipi interrupt from VPU.
98 * Return: Return 0 if ipi registers successfully, otherwise it is failed.
100 int vpu_ipi_register(struct platform_device *pdev, enum ipi_id id,
101 ipi_handler_t handler, const char *name, void *priv);
104 * vpu_ipi_send - send data from AP to vpu.
106 * @pdev: VPU platform device
108 * @buf: the data buffer
109 * @len: the data buffer length
111 * This function is thread-safe. When this function returns,
112 * VPU has received the data and starts the processing.
113 * When the processing completes, IPI handler registered
114 * by vpu_ipi_register will be called in interrupt context.
116 * Return: Return 0 if sending data successfully, otherwise it is failed.
118 int vpu_ipi_send(struct platform_device *pdev,
119 enum ipi_id id, void *buf,
123 * vpu_get_plat_device - get VPU's platform device
125 * @pdev: the platform device of the module requesting VPU platform
126 * device for using VPU API.
128 * Return: Return NULL if it is failed.
129 * otherwise it is VPU's platform device
131 struct platform_device *vpu_get_plat_device(struct platform_device *pdev);
134 * vpu_wdt_reg_handler - register a VPU watchdog handler
136 * @pdev: VPU platform device
137 * @vpu_wdt_reset_func: the callback reset function
138 * @private_data: the private data for reset function
141 * Register a handler performing own tasks when vpu reset by watchdog
143 * Return: Return 0 if the handler is added successfully,
144 * otherwise it is failed.
147 int vpu_wdt_reg_handler(struct platform_device *pdev,
148 void vpu_wdt_reset_func(void *),
149 void *priv, enum rst_id id);
152 * vpu_get_vdec_hw_capa - get video decoder hardware capability
154 * @pdev: VPU platform device
156 * Return: video decoder hardware capability
158 unsigned int vpu_get_vdec_hw_capa(struct platform_device *pdev);
161 * vpu_get_venc_hw_capa - get video encoder hardware capability
163 * @pdev: VPU platform device
165 * Return: video encoder hardware capability
167 unsigned int vpu_get_venc_hw_capa(struct platform_device *pdev);
170 * vpu_load_firmware - download VPU firmware and boot it
172 * @pdev: VPU platform device
174 * Return: Return 0 if downloading firmware successfully,
175 * otherwise it is failed
177 int vpu_load_firmware(struct platform_device *pdev);
180 * vpu_mapping_dm_addr - Mapping DTCM/DMEM to kernel virtual address
182 * @pdev: VPU platform device
183 * @dmem_addr: VPU's data memory address
185 * Mapping the VPU's DTCM (Data Tightly-Coupled Memory) /
186 * DMEM (Data Extended Memory) memory address to
187 * kernel virtual address.
189 * Return: Return ERR_PTR(-EINVAL) if mapping failed,
190 * otherwise the mapped kernel virtual address
192 void *vpu_mapping_dm_addr(struct platform_device *pdev,
194 #endif /* _MTK_VPU_H */