From iMX 3.1x kernel, all kernel debug messages will be print to debug serial port after UART driver loaded, so if the kernel hang up before tty console driver ready, there will be no kernel boot up messages.   The attached patch can be used to enable the iMX serial debug console in early time, then kernel will not buffer the debug messages.   Note: the default patch is for UART1 (tty0) as the debug port, if you need use other debug port, please modify the code "early_console_setup()" with correct UART port base address.   L3.10.53-Add-early-console-for-debug-message.patch This patch is based on L3.10.53_GA1.1.0 release, it can support iMX6S/DL/D/Q.   L3.14.52-Add-early-console-for-debug-message.patch This patch is based on L3.14.52_GA1.1.0 release, it can support iMX6S/DL/D/Q, iMX6SL, iMX6SX, iMX6UL and iMX7.  

The patches are based on iMX6 L3.10.53 and 3.14.52 GA BSP.   In default linux BSP, the followed two pathes were supported in kernel driver mxc_v4l2_capture.c: CSI->IC->MEM CSI->MEM   After appied these patches, it can support the followed path: CSI->VDI->IC->MEM CSI->VDI->MEM In this mode, the VDI de-interlace will be handled on the fly, so the whole system bandwidth will be reduced.   Limitations: 1. Since the IC can only output resolution up to 1024*1024, so this is the limation on output. 2. Only VDI motion mode 2 was supported.   mxc_v4l2_tvin.zip: It is the test aplication, test command for CSI->VDI->IC->MEM ("-i 2" means CSI->VDI->IC->MEM path.): ./mxc_v4l2_tvin.out -ol 0 -ot 0 -ow 800 -oh 480 -i 2 -g2d"   test command for CSI->VDI->MEM ("-i 3" means CSI->VDI->MEM path.): ./mxc_v4l2_tvin.out -ol 0 -ot 0 -ow 800 -oh 480 -i 3 -g2d"  

Some Chinese customers using i.MX series SoC maybe encounter some issues when they download android , u-boot & kernel source code by 'git' command, the following steps will show customer how to get them: 1. Getting repo --No.1 methord # cd ~ # mkdir myandroid # mkdir bin # cd bin # git clone git://aosp.tuna.tsinghua.edu.cn/android/git-repo.git/ <if git failed, use : git clone https://aosp.tuna.tsinghua.edu.cn/android/git-repo.git/> # cd git-repo # cp ./repo ../ --No.2 methord # cd ~ # mkdir bin # curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo # chmod a+x ~/bin/repo [Note]Customers can select one of above to get "repo" 2. Modifying repo File Open ~/bin/repo file with 'gedit' and Change google address From        REPO_URL = 'https://gerrit.googlesource.com/git-repo' To        REPO_URL = 'git://aosp.tuna.tsinghua.edu.cn/android/git-repo'        like following: ## repo default configuration ## REPO_URL = 'git://aosp.tuna.tsinghua.edu.cn/android/git-repo' REPO_REV = 'stable' 3、Setting email address # cd ~/myandroid # git config --global user.email "weidong.sun@nxp.com" # git config --global user.name "weidong.sun" [ Email & Name should be yours] 4、Getting manifest # ~/bin/repo init -u https://aosp.tuna.tsinghua.edu.cn/android/platform/manifest -b android-5.1.1_r1 # cd ~/myandroid/.repo # gedit manifest.xml        Then change the value of fetch to " git://aosp.tuna.tsinghua.edu.cn/android/ ", like following: <manifest>   <remote name="aosp"            fetch="git://aosp.tuna.tsinghua.edu.cn/android/" />   <default revision="refs/tags/android-5.1.1_r1" ...... [Note] android-5.1.1_r1 is version of branch,customer can change it to another. 5、# ~/bin/repo sync          [Note] During runing repo sync, maybe errors will occur like the following: ...... * [new tag]         studio-1.4 -> studio-1.4 error: Exited sync due to fetch errors          Then 'repo sync' exits. But don't worry about it, continue to run the command please ! " ~/bin/repo sync", downloading source code will be continous. 6、Getting Cross Compiler # cd ~/myandroid/prebuilts/gcc/linux-x86/arm # git clone https://aosp.tuna.tsinghua.edu.cn/android/platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6 # cd arm-eabi-4.6 # git checkout android-4.4.3_r1 7、Getting linux kernel source code        Probably, customer can't normally get linux kernel by using "git clone" command, she can download it directly from the following weblink:        http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/        At first, create a temperary directory, then download kernel into the directory. see following steps: # cd ~ /Downloads # mkdir linux-kernel   Atfer downloading l5.1.1_2.1.0-ga.tar.gz, use 'tar zxvf l5.1.1_2.1.0-ga.tar.gz' command to decompress it.        Then you can find a subdirectory name " l5.1.1_2.1.0-ga" is created, linux source code is in the directory, we should copy all files in the directory to ~/myandroid/kernel_imx/ # cd ~/myandroid # mkdir kernel_imx # cd kernel_imx # cp -a ~ /Downloads/linux-kernel/l5.1.1_2.1.0-ga ./ 8、Getting uboot source code               Probably, customer can't normally get linux kernel by using "git clone" command, she can download it directly from the following weblink:       http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/        We can use similar way to that of linux kernel to get u-boot source code: # cd ~ /Downloads # mkdir u-boot        Download l5.1.1_2.1.0-ga.tar.gz file, and save it in ~ /Downloads/ u-boot, then decompress it, then u-boot source code will be in ~ /Downloads/ u-boot / l5.1.1_2.1.0-ga/, we should copy all file in the path to ~/myandroid/bootable/bootloader/uboot-imx/ # cd ~/myandroid/bootable/bootloader # mkdir uboot-imx # cd uboot-imx # cp -a ~ /Downloads/u-boot/l5.1.1_2.1.0-ga/* ./ 9、Patch android BSP source code        android_L5.1.1_2.1.0_consolidated-ga_core_source.gz is the name of patch. Run following command to patch android. # copy android_L5.1.1_2.1.0_consolidated-ga_core_source.gz /opt/ # tar zxvf android_L5.1.1_2.1.0_consolidated-ga_core_source.gz # cd /opt/ android_L5.1.1_2.1.0_consolidated-ga_core_source/code/ # tar zxvf L5.1.1_2.1.0_consolidated-ga.tar.gz # cd ~/myandroid # source /opt/ android_L5.1.1_2.1.0_consolidated-ga_core_source/code/ L5.1.1_2.1.0_consolidated-ga/ and_patch.sh # help # c_patch /opt/ android_L5.1.1_2.1.0_consolidated-ga_core_source/code/ L5.1.1_2.1.0_consolidated-ga/ imx_L5.1.1_2.1.0-ga        If everything is OK, the following logs will display on console:               **************************************************************        Success: Now you can build the Android code for FSL i.MX platform               ************************************************************** 10、Patch Freescale extended feathures code        Please refer to chapter 3.3 of Android_User's_Guide.pdf to patch another 2 files:        (1) android_L5.1.1_2.1.0_consolidated-ga_omxplayer_source.gz        (2) android_L5.1.1_2.1.0_consolidated-ga_wfdsink_source.gz [Note]       As for other steps, such as compiling etc, please refer to Android_User's_Guide.pdf that released by NXP. TICS team Weidong Sun 04/01/2016

Most common issues with bringup and memory stability come down to memory/system setup during startup phase of i.MX device.   This Python script allows you to dump IVT/DCD tables and data from a i.MX binary (either generated as result of build process or a simple dump of SD/NOR/NAND... content) and analyze them in an easier way. Should work with i.MX 6 and i.MX53 binaries.   Parser for i.MX 6 will also try to print out register values it recognizes, and also parse specific register fields, helping to analyze the data faster. This can be extended if needed to other registers/values.   imxbin.py works with Python3.x and imxbin_2x.py with Python 2.x, so choose appropriate version.   Vladan

1. Description     1) Support HDMI interlaced display mode, the followed format had been verified.         CEA format 5: 1920x1080i @60Hz         CEA format 6&7: 720(1440)x480i @60Hz         CEA format 20: 1920x1080i @50Hz         CEA format 21&22: 720(1440)x576i @50Hz     2) Support LCD interface for interlaced display mode, 1920x1080i @50Hz(CEA format 20)        had been verified. 2. File List -- 0001-IPUv3-support-interlaced-display-mode.patch    Patch to support interlaced display output for iMX6 ipuv3. -- 0002-iMX6-HDMI-support-interlaced-display-mode.patch    Patch to support interlaced display mode for iMX6 HDMI driver. -- 0003-iMX6-LCD-interface-supports-1920x1080i50-mode.patch    Patch to support interlaced display mode for iMX6 LCD interface driver.    -- readme.txt    this file, please refer to it before use the patches 3. Requirement - iMX6 SabreSD board. - L3.0.35_4.1.0_GA_iMX6DQ kernel. 4. How to use -- Copy the patch files to kernel folder.     $ cd ~/ltib/rpm/BUILD/linux-3.0.35/     $ git apply ./0001-IPUv3-support-interlaced-display-mode.patch     $ git apply ./0002-iMX6-HDMI-support-interlaced-display-mode.patch     $ git apply ./0003-iMX6-LCD-interface-supports-1920x1080i50-mode.patch -- Build the new kernel image:     $ cd ~/ltib/rpm/BUILD/linux-3.0.35     $ export CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-fsl-linux-gnueabi-     $ export ARCH=arm     $ make imx6_defconfig     $ make uImage -- Uboot parameters for video mode    Output 1080i50 display mode on HDMI:       "video=mxcfb0:dev=hdmi,1920x1080Mi@25,if=RGB24,bpp=32"    Output 1080i60 display mode on HDMI:       "video=mxcfb0:dev=hdmi,1920x1080Mi@30,if=RGB24,bpp=32"    Output 576i50 display mode on HDMI:       "video=mxcfb0:dev=hdmi,1440x576Mi@25,if=RGB24,bpp=32"    Output 480i60 display mode on HDMI:       "video=mxcfb0:dev=hdmi,1440x480Mi@30,if=RGB24,bpp=32"    Output 1080i50 display mode on LCD interface:       "video=mxcfb0:dev=lcd,LCD-1080I50,if=RGB565,bpp=32"       -- Switch HDMI interlaced mode    $ echo S:1920x1080i-50 > /sys/class/graphics/fb0/mode    $ echo S:1920x1080i-60 > /sys/class/graphics/fb0/mode    $ echo S:1440x480i-50 > /sys/class/graphics/fb0/mode    $ echo S:1440x576i-60 > /sys/class/graphics/fb0/mode 5. Know issue     1) When the interlaced display and another display work on same IPU,        blank and unblank the interlaced display will get the followed IPU        warning, but the display still works due to IPU can revover from the error.     imx-ipuv3 imx-ipuv3.0: IPU Warning - IPU_INT_STAT_5 = 0x00800000     imx-ipuv3 imx-ipuv3.0: IPU Warning - IPU_INT_STAT_10 = 0x00080000 2015-05-13 update: Replace the fourth patch to make interlace display mode follow CEA-861-specification The patch "0004-IPU-fine-tuning-the-interlace-display-timing-for-CEA.patch" was fine tuned for CEA-861-D specification on interlaced mode display. Please use this patch to replace the old 0004 patch. 2016-05-20 Update: For 3.0.35 BSP, add patch 0005-IPU-update-interlaced-video-mode-parameters-to-align.patch      Align the interlaced video mode parameters to progressive mode. 0006-IPU-update-IDMAC-setting-for-interlaced-display-mode.patch      Udate the IDMAC setting for interlaced display mode, output odd field data from memory first, it aligns with IPU DI timing, odd field first. For 3.14.52 BSP, created the new patch L3.14.52_1.1.0_GA_HDMI_Interlaced_Mode_Patch_2016_05_20.zip.

This is a HW design checklist for customer's reference. Please read and fill it in carefully before requesting a schematic review. Rev3.1 @2016.10.19 -- 1. Add i.MX6DQP related contents.