Freescale Semiconductor I.MX 6Solo Manual de usuario

i.MX 6Solo/6DualLite Linux Reference

Manual

Document Number: IMX6SDLLXRM

Rev L3.0.35_4.1.0, 09/2013

i.MX 6Solo/6DualLite Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013

2 Freescale Semiconductor, Inc.

Contents

Section number Title Page

Chapter 1

About This Book

1.1 Audience.......................................................................................................................................................................23

1.1.1 Conventions.....................................................................................................................................................23

1.1.2 Definitions, Acronyms, and Abbreviations......................................................................................................23

Chapter 2

Introduction

2.1 Overview.......................................................................................................................................................................27

2.1.1 Software Base..................................................................................................................................................27

2.1.2 Features............................................................................................................................................................27

Chapter 3

Machine Specific Layer (MSL)

3.1 Introduction...................................................................................................................................................................33

3.2 Interrupts (Operation)...................................................................................................................................................34

3.2.1 Interrupt Hardware Operation..........................................................................................................................34

3.2.2 Interrupt Software Operation...........................................................................................................................34

3.2.3 Interrupt Features.............................................................................................................................................35

3.2.4 Interrupt Source Code Structure......................................................................................................................35

3.2.5 Interrupt Programming Interface.....................................................................................................................35

3.3 Timer.............................................................................................................................................................................36

3.3.1 Timer Software Operation...............................................................................................................................36

3.3.2 Timer Features.................................................................................................................................................36

3.3.3 Timer Source Code Structure...........................................................................................................................37

3.3.4 Timer Programming Interface..........................................................................................................................37

3.4 Memory Map................................................................................................................................................................37

3.4.1 Memory Map Hardware Operation..................................................................................................................37

3.4.2 Memory Map Software Operation...................................................................................................................37

3.4.3 Memory Map Features.....................................................................................................................................37

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Section number Title Page

3.4.4 Memory Map Source Code Structure..............................................................................................................38

3.4.5 Memory Map Programming Interface.............................................................................................................38

3.5 IOMUX.........................................................................................................................................................................38

3.5.1 IOMUX Hardware Operation..........................................................................................................................39

3.5.2 IOMUX Software Operation............................................................................................................................39

3.5.3 IOMUX Features..............................................................................................................................................40

3.5.4 IOMUX Source Code Structure.......................................................................................................................40

3.5.5 IOMUX Programming Interface......................................................................................................................40

3.5.6 IOMUX Control Through GPIO Module........................................................................................................40

3.5.6.1 GPIO Hardware Operation...............................................................................................................41

3.5.6.1.1 Muxing Control...............................................................................................................41

3.5.6.1.2 PULLUP Control............................................................................................................41

3.5.6.2 GPIO Software Operation (general)................................................................................................41

3.5.6.3 GPIO Implementation......................................................................................................................41

3.5.6.4 GPIO Source Code Structure...........................................................................................................42

3.5.6.5 GPIO Programming Interface..........................................................................................................42

3.6 General Purpose Input/Output(GPIO)..........................................................................................................................42

3.6.1 GPIO Software Operation................................................................................................................................42

3.6.1.1 API for GPIO...................................................................................................................................43

3.6.2 GPIO Features..................................................................................................................................................43

3.6.3 GPIO Module Source Code Structure..............................................................................................................43

3.6.4 GPIO Programming Interface 2.......................................................................................................................44

Chapter 4

Smart Direct Memory Access (SDMA) API

4.1 Overview.......................................................................................................................................................................45

4.1.1 Hardware Operation.........................................................................................................................................45

4.1.2 Software Operation..........................................................................................................................................45

4.1.3 Source Code Structure.....................................................................................................................................46

4.1.4 Menu Configuration Options...........................................................................................................................47

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4.1.5 Programming Interface....................................................................................................................................47

4.1.6 Usage Example................................................................................................................................................47

Chapter 5

AHB-to-APBH Bridge with DMA (APBH-Bridge-DMA)

5.1 Overview.......................................................................................................................................................................49

5.1.1 Hardware Operation.........................................................................................................................................49

5.1.2 Software Operation..........................................................................................................................................50

5.1.3 Source Code Structure.....................................................................................................................................50

5.1.4 Menu Configuration Options...........................................................................................................................51

5.1.5 Programming Interface....................................................................................................................................51

5.1.6 Usage Example................................................................................................................................................51

Chapter 6

Image Processing Unit (IPU) Drivers

6.1 Introduction...................................................................................................................................................................53

6.2 Hardware Operation......................................................................................................................................................55

6.3 Software Operation.......................................................................................................................................................55

6.3.1 Overview of IPU Frame Buffer Drivers..........................................................................................................56

6.3.1.1 IPU Frame Buffer Hardware Operation...........................................................................................57

6.3.1.2 IPU Frame Buffer Software Operation............................................................................................57

6.3.1.3 Synchronous Frame Buffer Driver...................................................................................................58

6.3.2 IPU Backlight Driver.......................................................................................................................................59

6.3.3 IPU Device Driver...........................................................................................................................................59

6.4 Source Code Structure .................................................................................................................................................60

6.4.1 Menu Configuration Options...........................................................................................................................61

6.5 Unit Test........................................................................................................................................................................64

6.5.1 Framebuffer Tests............................................................................................................................................65

6.5.2 Video4Linux API test......................................................................................................................................65

6.5.3 IPU Device Unit test........................................................................................................................................66

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Section number Title Page

Chapter 7

MIPI DSI Driver

7.1 Introduction...................................................................................................................................................................71

7.1.1 Overview of MIPI DSI IP Driver.....................................................................................................................71

7.1.2 Overview of MIPI DSI Display Panel Driver..................................................................................................72

7.1.3 Hardware Operation.........................................................................................................................................72

7.2 Software Operation.......................................................................................................................................................72

7.2.1 MIPI DSI IP Driver Software Operation.........................................................................................................72

7.2.2 MIPI DSI Display Panel Driver Software Operation.......................................................................................73

7.3 Driver Features..............................................................................................................................................................73

7.3.1 Source Code Structure.....................................................................................................................................74

7.3.2 Menu Configuration Options...........................................................................................................................74

7.3.3 Programming Interface....................................................................................................................................74

Chapter 8

Video for Linux Two (V4L2) Driver

8.1 Introduction...................................................................................................................................................................75

8.2 V4L2 Capture Device...................................................................................................................................................76

8.2.1 V4L2 Capture IOCTLs....................................................................................................................................76

8.2.2 Using the V4L2 Capture APIs.........................................................................................................................78

8.3 V4L2 Output Device.....................................................................................................................................................79

8.3.1 V4L2 Output IOCTLs......................................................................................................................................79

8.3.2 Using the V4L2 Output APIs...........................................................................................................................80

8.4 Source Code Structure .................................................................................................................................................80

8.4.1 Menu Configuration Options...........................................................................................................................81

8.4.2 V4L2 Programming Interface..........................................................................................................................81

Chapter 9

Electrophoretic Display Controller (EPDC) Frame Buffer Driver

9.1 Introduction...................................................................................................................................................................83

9.2 Hardware Operation......................................................................................................................................................84

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9.3 Software Operation.......................................................................................................................................................84

9.3.1 EPDC Frame Buffer Driver Overview.............................................................................................................84

9.3.2 EPDC Frame Buffer Driver Extensions...........................................................................................................85

9.3.3 EPDC Panel Configuration..............................................................................................................................85

9.3.3.1 Boot Command Line Parameters.....................................................................................................86

9.3.4 EPDC Waveform Loading...............................................................................................................................87

9.3.4.1 Using a Default Waveform File.......................................................................................................87

9.3.4.2 Using a Custom Waveform File.......................................................................................................88

9.3.5 EPDC Panel Initialization................................................................................................................................88

9.3.6 Grayscale Framebuffer Selection.....................................................................................................................89

9.3.7 Enabling An EPDC Splash Screen...................................................................................................................89

9.4 Source Code Structure .................................................................................................................................................90

9.5 Menu Configuration Options........................................................................................................................................90

9.6 Programming Interface.................................................................................................................................................91

9.6.1 IOCTLs/Functions...........................................................................................................................................91

9.6.2 Structures and Defines.....................................................................................................................................94

Chapter 10

Pixel Pipeline (PxP) DMA-ENGINE Driver

10.1 Introduction...................................................................................................................................................................97

10.2 Hardware Operation......................................................................................................................................................97

10.3 Software Operation.......................................................................................................................................................97

10.3.1 Key Data Structs..............................................................................................................................................97

10.3.2 Channel Management......................................................................................................................................98

10.3.3 Descriptor Management...................................................................................................................................98

10.3.4 Completion Notification..................................................................................................................................98

10.3.5 Limitations.......................................................................................................................................................99

10.4 Menu Configuration Options........................................................................................................................................99

10.5 Source Code Structure..................................................................................................................................................99

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Section number Title Page

Chapter 11

Graphics Processing Unit (GPU)

11.1 Introduction...................................................................................................................................................................101

11.1.1 Driver Features.................................................................................................................................................101

11.1.1.1 Hardware Operation.........................................................................................................................101

11.1.1.2 Software Operation..........................................................................................................................102

11.1.1.3 Source Code Structure ....................................................................................................................102

11.1.1.4 Library Structure .............................................................................................................................102

11.1.1.5 API References................................................................................................................................104

11.1.1.6 Menu Configuration Options...........................................................................................................104

Chapter 12

Direct FB

12.1 Introduction...................................................................................................................................................................105

12.1.1 Hardware Operation.........................................................................................................................................105

12.2 Software Operation.......................................................................................................................................................105

12.2.1 DirectFB Acceleration Architecture................................................................................................................106

12.2.2 i.MX DirectFB Driver Details.........................................................................................................................107

12.2.3 The gal_config File for i.MX DirectFB Driver................................................................................................107

12.3 DirectFB EGL...............................................................................................................................................................109

12.4 Setting Up DirectFB Acceleration................................................................................................................................109

Chapter 13

HDMI Driver

13.1 Introduction...................................................................................................................................................................111

13.1.1 Hardware Operation.........................................................................................................................................111

13.2 Software Operation.......................................................................................................................................................113

13.2.1 Core..................................................................................................................................................................113

13.2.2 Video................................................................................................................................................................114

13.2.3 Display Device Registration and Initialization................................................................................................115

13.2.4 Hotplug Handling and Video Mode Changes..................................................................................................116

13.2.5 Audio................................................................................................................................................................116

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13.2.6 CEC..................................................................................................................................................................118

13.3 Source Code Structure..................................................................................................................................................118

13.3.1 Linux Menu Configuration Options.................................................................................................................120

13.4 Unit Test........................................................................................................................................................................121

13.4.1 Video................................................................................................................................................................121

13.4.2 Audio................................................................................................................................................................122

13.4.3 CEC..................................................................................................................................................................122

Chapter 14

X Windows Acceleration

14.1 Introduction...................................................................................................................................................................123

14.2 Hardware Operation......................................................................................................................................................123

14.3 Software Operation.......................................................................................................................................................123

14.3.1 X Windows Acceleration Architecture............................................................................................................124

14.3.2 i.MX 6 Driver for X-Windows System............................................................................................................125

14.3.3 i.MX 6 Direct Rendering Infrastructure (DRI) for X-Windows System.........................................................127

14.3.4 EGL- X Library................................................................................................................................................128

14.3.5 xorg.conf for i.MX 6........................................................................................................................................128

14.3.6 Setup X-Windows System Acceleration..........................................................................................................130

Chapter 15

Video Processing Unit (VPU) Driver

15.1 Hardware Operation......................................................................................................................................................133

15.1.1 Software Operation..........................................................................................................................................134

15.1.2 Source Code Structure.....................................................................................................................................135

15.1.3 Menu Configuration Options...........................................................................................................................136

15.1.4 Programming Interface....................................................................................................................................137

15.1.5 Defining an Application...................................................................................................................................138

Chapter 16

OmniVision Camera Driver

16.1 OV5640 Using MIPI CSI-2 interface...........................................................................................................................139

16.1.1 Hardware Operation.........................................................................................................................................139

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16.1.2 Software Operation..........................................................................................................................................139

16.1.3 Source Code Structure.....................................................................................................................................140

16.1.4 Linux Menu Configuration Options.................................................................................................................140

16.2 OV5640 Using parallel interface..................................................................................................................................141

16.2.1 Hardware Operation.........................................................................................................................................141

16.2.2 Software Operation..........................................................................................................................................141

16.2.3 Source Code Structure.....................................................................................................................................142

16.2.4 Linux Menu Configuration Options.................................................................................................................142

Chapter 17

MIPI CSI2 Driver

17.1 Introduction...................................................................................................................................................................143

17.1.1 MIPI CSI2 Driver Overview............................................................................................................................143

17.1.2 Hardware Operation.........................................................................................................................................144

17.2 Software Operation.......................................................................................................................................................144

17.2.1 MIPI CSI2 Driver Initialize Operation............................................................................................................144

17.2.2 MIPI CSI2 Common API Operation................................................................................................................145

17.3 Driver Features..............................................................................................................................................................145

17.3.1 Source Code Structure.....................................................................................................................................146

17.3.2 Menu Configuration Options...........................................................................................................................146

17.3.3 Programming Interface....................................................................................................................................146

17.3.4 Interrupt Requirements....................................................................................................................................147

Chapter 18

Low-level Power Management (PM) Driver

18.1 Hardware Operation......................................................................................................................................................149

18.1.1 Software Operation..........................................................................................................................................149

18.1.2 Source Code Structure.....................................................................................................................................150

18.1.3 Menu Configuration Options...........................................................................................................................150

18.1.4 Programming Interface....................................................................................................................................151

18.1.5 Unit Test...........................................................................................................................................................151

i.MX 6Solo/6DualLite Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013

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