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by kirgene
Mon Jun 24, 2019 11:17 am
Forum: Advanced users
Topic: How to correctly set up v4l2 (m2m) under 64-bit kernel / 64-bit userland?
Replies: 13
Views: 2729

Re: How to correctly set up v4l2 (m2m) under 64-bit kernel / 64-bit userland?

I'm getting a bunch of errors in dmesg (20-22 lines) while starting playback and a few such errors during playback: ... [ 6600.658148] vc_sm_cma_import_dmabuf_internal: Expecting an uncached alias for dma_addr 0x4ab00000 [ 6600.680280] vc_sm_cma_import_dmabuf_internal: Expecting an uncached alias fo...
by kirgene
Sun Apr 23, 2017 1:09 pm
Forum: OpenGLES
Topic: Can't render to render buffer
Replies: 1
Views: 2344

Can't render to render buffer

I'd like to do offscreen rendering and processing using render buffer and EGL_IMAGE_BRCM_VCSM: GLuint buffer = 0; m_gl_funcs->glGenRenderbuffers(1, &buffer); m_gl_funcs->glBindRenderbuffer(GL_RENDERBUFFER, buffer); m_vcsm_info->width = m_vcsm_info->height = 2048; EGLImageKHR eglFbImage = eglCreateIm...
by kirgene
Wed Mar 22, 2017 10:05 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Device Tree in initramfs
Replies: 0
Views: 295

Device Tree in initramfs

I'm building custom kernel and wanted to know if it's possible to place Device Tree and all overlays inside initramfs image.
Also is there any way to merge all overlays (using dtmerge ?) into single Device Tree on host machine (x86)?
by kirgene
Sat Feb 11, 2017 4:42 pm
Forum: OpenGLES
Topic: MMAL video playback and OpenGL ES
Replies: 0
Views: 1966

MMAL video playback and OpenGL ES

Hi,

Is there any way of playing video using MMAL and display it using OpenGL ES in zero copy mode?
by kirgene
Sun Oct 30, 2016 8:38 pm
Forum: General discussion
Topic: Boot from second SD card (SD1 pins)
Replies: 9
Views: 2068

Re: Boot from second SD card (SD1 pins)

Here is interesting info about boot from secondary SD: ... If enabled: check secondary SD Success - Boot Fail - timeout (five seconds) ... The primary SD card boot mode is, as standard, set to be GPIOs 49-53. It is possible to boot from the secondary SD card on a second set of pins, i.e. to add a s...
by kirgene
Sun Oct 30, 2016 12:10 pm
Forum: Graphics programming
Topic: Minimal MMAL Video Player
Replies: 0
Views: 1121

Minimal MMAL Video Player

Hello,

I couldn't find info on how to build minimal video player using MMAL.
The idea is to use MMAL container to parse mp4 stream and display it on screen (with something similar to OpenMAX's video_render).
Could you help me with some code examples?

Thanks.
by kirgene
Tue Oct 25, 2016 3:12 pm
Forum: General discussion
Topic: Secure Boot / OTP / Encrypted Boot
Replies: 15
Views: 8614

Re: Secure Boot / OTP / Encrypted Boot

I have the same question. Will it be possible to use secure boot? Is it even possible with this hardware? There is Secure Boot on the VC4 part :) Including encrypted suspend/resume RAM :mrgreen: However, I don't know if a blob verifying the Linux kernel signature is existing Could you explain it in...
by kirgene
Sat Mar 19, 2016 2:02 am
Forum: General discussion
Topic: Secure Boot / OTP / Encrypted Boot
Replies: 15
Views: 8614

Re: Secure Boot / OTP / Encrypted Boot

I have the same question. Will it be possible to use secure boot?
Is it even possible with this hardware?
by kirgene
Sun Sep 20, 2015 2:58 am
Forum: Official Foundation Display
Topic: Connect second HDMI monitor to DSI interface
Replies: 1
Views: 959

Connect second HDMI monitor to DSI interface

Hi, I'd like to use two regular HDMI monitors for my setup and DSI port perfectly fits for this role. I wonder is it possible to connect HDMI monitor using DSI-to-HDMI bridge (ADV7533) board and get correct picture on screen? Also can I expect 1080p picture resolution from such configuration or firm...
by kirgene
Sat Aug 08, 2015 12:27 am
Forum: HATs and other add-ons
Topic: Gert's VGA add-on for the B+
Replies: 240
Views: 112921

Re: Gert's VGA add-on for the B+

Hello,
What chip should I use to convert DPI to HDMI? I'd like to have two HDMI outputs.
by kirgene
Sat Aug 08, 2015 12:02 am
Forum: HATs and other add-ons
Topic: Setting up VGA666
Replies: 15
Views: 4589

Re: Setting up VGA666

Can I use VGA adapter that uses all GPIO pins for 24bit colour (VGA888) with current firmware?
by kirgene
Tue May 19, 2015 7:24 am
Forum: OpenMAX
Topic: OpenMAX render video to MIPI DSI
Replies: 2
Views: 2238

OpenMAX render video to MIPI DSI

Hi, I'd like to know if it is possible to render video via video_render component directly to DSI display?
by kirgene
Sat Jun 07, 2014 3:17 pm
Forum: Graphics programming
Topic: Dispmanx HDMI blackout
Replies: 8
Views: 5427

Re: Dispmanx HDMI blackout

Any updates on how to fix this behaviour?

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