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Registered User m (remove "Cortex-A35 master boot" chapters, useless for v6 and wording to review) Tag: 2017 source edit |
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<noinclude> | |||
{{ApplicableFor | {{ApplicableFor | ||
|MPUs list=STM32MP25x | |MPUs list=STM32MP23x, STM32MP25x | ||
|MPUs checklist=STM32MP13x, STM32MP15x, STM32MP25x | |MPUs checklist=STM32MP13x, STM32MP15x, STM32MP21x, STM32MP23x, STM32MP25x | ||
}} | }} | ||
</noinclude> | |||
==Article purpose== | ==Article purpose== | ||
The purpose of this article is to: | The purpose of this article is to: | ||
| Line 13: | Line 13: | ||
==Peripheral overview== | ==Peripheral overview== | ||
The '''VDEC''' (Video DECoder) peripheral is an hardware accelerator for video compressed content decoding such as H264 or VP8 bitstream. | The '''VDEC''' (Video DECoder) peripheral is an hardware accelerator for video compressed content decoding such as H264 or VP8 bitstream and still-image content such as JPEG or WebP bitstream. | ||
Refer to the [[STM32 MPU resources#Reference manuals|STM32 MPU reference manuals]] for the complete list of features, and to the software frameworks and drivers, introduced below, to see which features are implemented. | Refer to the [[STM32 MPU resources#Reference manuals|STM32 MPU reference manuals]] for the complete list of features, and to the software frameworks and drivers, introduced below, to see which features are implemented. | ||
| Line 21: | Line 21: | ||
===Boot time assignment=== | ===Boot time assignment=== | ||
====On {{MicroprocessorDevice | device=23}}==== | |||
{{#lst:STM32MP2_internal_peripherals_assignment_table_template|stm32mp2_a35_boottime}} | |||
<section begin=stm32mp23_a35_boottime /> | |||
| rowspan="1" | Visual | |||
| rowspan="1" | [[VDEC internal peripheral | VDEC]] | |||
| VDEC | |||
| | |||
| | |||
| <span title="assignable peripheral but not supported" style="font-size:21px">⬚</span> | |||
| | |||
|- | |||
<section end=stm32mp23_a35_boottime /> | |||
|} | |||
====On {{MicroprocessorDevice | device=25}}==== | |||
{{#lst:STM32MP2_internal_peripherals_assignment_table_template|stm32mp2_a35_boottime}} | {{#lst:STM32MP2_internal_peripherals_assignment_table_template|stm32mp2_a35_boottime}} | ||
<section begin=stm32mp25_a35_boottime /> | <section begin=stm32mp25_a35_boottime /> | ||
| Line 37: | Line 52: | ||
===Runtime assignment=== | ===Runtime assignment=== | ||
====On {{MicroprocessorDevice | device=23}}==== | |||
{{#lst:STM32MP2_internal_peripherals_assignment_table_template|stm32mp23_runtime}} | |||
<section begin=stm32mp23_a35_runtime /> | |||
| rowspan="1" | Visual | |||
| rowspan="1" | [[VDEC internal peripheral | VDEC]] | |||
| VDEC | |||
| <span title="assignable peripheral but not supported" style="font-size:21px">⬚</span><sup>OP-TEE</sup> | |||
| <span title="assigned peripheral" style="font-size:21px">☑</span> | |||
| <span title="assignable peripheral but not supported" style="font-size:21px">⬚</span> | |||
| <span title="assignable peripheral but not supported" style="font-size:21px">⬚</span> | |||
| | |||
|- | |||
<section end=stm32mp23_a35_runtime /> | |||
|} | |||
====On {{MicroprocessorDevice | device=25}}==== | ====On {{MicroprocessorDevice | device=25}}==== | ||
Latest revision as of 16:59, 22 October 2024
1. Article purpose[edit | edit source]
The purpose of this article is to:
- briefly introduce the VDEC peripheral and its main features,
- indicate the peripheral instances assignment at boot time and their assignment at runtime (including whether instances can be allocated to secure contexts),
- list the software frameworks and drivers managing the peripheral,
- explain how to configure the peripheral.
2. Peripheral overview[edit | edit source]
The VDEC (Video DECoder) peripheral is an hardware accelerator for video compressed content decoding such as H264 or VP8 bitstream and still-image content such as JPEG or WebP bitstream.
Refer to the STM32 MPU reference manuals for the complete list of features, and to the software frameworks and drivers, introduced below, to see which features are implemented.
3. Peripheral usage[edit | edit source]
This chapter is applicable in the scope of the OpenSTLinux BSP running on the Arm® Cortex®-A processor(s).
3.1. Boot time assignment[edit | edit source]
3.1.1. On STM32MP23 unknown microprocessor device[edit | edit source]
STM32MP2 internal peripherals assignment table template
| rowspan="1" | Visual | rowspan="1" | VDEC | VDEC | | | ⬚ | |-
|}
3.1.2. On STM32MP25x lines 
[edit | edit source]
STM32MP2 internal peripherals assignment table template
| rowspan="1" | Visual | rowspan="1" | VDEC | VDEC | | | ⬚ | |-
|}
3.2. Runtime assignment[edit | edit source]
3.2.1. On STM32MP23 unknown microprocessor device[edit | edit source]
STM32MP2 internal peripherals assignment table template
| rowspan="1" | Visual | rowspan="1" | VDEC | VDEC | ⬚OP-TEE | ☑ | ⬚ | ⬚ | |-
|}
3.2.2. On STM32MP25x lines [edit | edit source]
STM32MP2 internal peripherals assignment table template
| rowspan="1" | Visual | rowspan="1" | VDEC | VDEC | ⬚OP-TEE | ☑ | ⬚ | ⬚ | | |-
|}
4. Software frameworks and drivers[edit | edit source]
Below are listed the software frameworks and drivers managing the VDEC peripheral for the embedded software components listed in the above tables.
- Linux®: V4L2 framework
5. How to assign and configure the peripheral[edit | edit source]
The peripheral assignment can be done via the STM32CubeMX graphical tool (and manually completed if needed).
This tool also helps to configure the peripheral by generating:
- partial device trees (pin control and clock tree) for the OpenSTLinux software components,
- HAL initialization code for the STM32CubeMPU Package.
The configuration is applied by the firmware running in the context in which the peripheral is assigned.
See also additional information in the VDEC device tree configuration article for Linux®.
6. References[edit | edit source]
Arm® is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere. 