On Fri, 25 May 2018, lester magtagad <lester.magtagad@xxxxxxxxx> wrote: > Hello everyone, > > I am new to DRM and linux, I started reading developers guide and research > on my own. > > I don't know where to start on how to communicate the DP helper functions > (drm_dp_dpcd_read, drm_dp_dpcd_readb, drm_dp_dpcd_write, > drm_dp_dpcd_writeb), > what will I include(#include<sample.h>) in my main program. I already have > drm in my setup(kernel version:4.4.21-69), I also have libdrm-2.4.92 API , > the problem is I don't really have an idea on how use it. > > My main objective is I want to read and write brightness/backlight level on > DP connections. > > Is it possible to use only the libdrm api to import DP helper functions?if > yes how? > > Maybe someone can help/guide me on this? Where does the sudden interest with DPCD access from userspace come from? See the thread [1]. My replies there should cover this. I'm starting to wonder if this is an XY problem... BR, Jani. [1] http://mid.mail-archive.com/471791572.2287221.1526561265798@xxxxxxxxxxxxxx -- Jani Nikula, Intel Open Source Graphics Center _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
