On Mon, May 27, 2019 at 12:41 PM Pintu Agarwal <pintu.ping@xxxxxxxxx> wrote: > > Dear All, > > I have a iMX.6 (arm 32) board with Linux Kernel 3.10 and debian > platform running. > The board is connected to one LCD screen and one HDMI monitor. > It have DRM + Wayland setup for display. > Also, I noticed that it have two dri interface: > /dev/dri/card0 > /dev/dri/card1 > > I am not very familiar with Linux Graphics/Display subsystem, so I am > looking for some help here. > > My requirement is that I have turn off HDMI display screen using a > command line utility or test program. > I learn that for X-server we can use xset : xset dpms force off (and > it works on my ubuntu desktop with 16.04). > > However this command does not exists on my board. > So, my question is: > Is there any equivalent DPMS commands for Wayland/Wetson? > > --------- > Further, in order to explore more, I cloned libdrm code from here: > url = https://gitlab.freedesktop.org/mesa/drm > > Then I found some test utility under: drm/tests folder. > After exploring more, and few modification, somehow I could able to > cross-compile "proptest" for my board using below: > arm-linux-gnueabi-gcc -o proptest.out proptest.c > -I./target/libdrm_include/ -L./target/libdrm_lib/ -ldrm > > I found that "/dev/dri/card0" is not working with this test. > So, I changed the test utility like this: > fd = drmOpen("imx-drm", NULL); > OR > fd = open("/dev/dri/card1", O_RDWR); > > When I default run it on my board, I see that "Connector_id: 29" is > showing for the HDMI display and it can support DPMS property. > {{{ > Connector 29 (11-1) > 1 EDID: > flags: immutable blob > blobs: > > value: > XXXXXXX > 2 DPMS: > flags: enum > enums: On=0 Standby=1 Suspend=2 Off=3 > value: 0 > CRTC 24 > CRTC 27 > }}} > > Then, when I try to run it using below command: > # ./proptest.out 29 connector 2 3 > > The program just returns successfully without any errors, but nothing > happens. The display does not turns off. > I saw that in my kernel 3.10 the ioctl(DRM_IOCTL_MODE_SETPROPERTY) is > already supported under DRM. > > So, I am wondering what is the right way to verify DPMS mode property > on wayland ? > > If anybody have any suggestions, please help me. > > > Thanks, > Pintu + etnaviv@xxxxxxxxxxxxxxxxxxxxx _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
