Hi Liviu, On 5 August 2015 at 15:28, Liviu Dudau <Liviu.Dudau@xxxxxxx> wrote: > The HDLCD controller is a display controller that supports resolutions > up to 4096x4096 pixels. It is present on various development boards > produced by ARM Ltd and emulated by the latest Fast Models from the > company. > I believe there is a unofficial requirement(?) for new drm drivers to use atomic modesetting. Not 100% sure on this one though. The following drivers: tegra, msm, rcar-du, i915, and Daniel's blog [1] [2] cat provide some information on the topic. The driver seems to has has a bit of dead code guarded by HDLCD_*_UNDERRUN. Perhaps these macros should become build or runtime switch(es) ? Most DRM drivers do not threat dma, bus_error, vsync and/or underrun interrupts as debug functionality. They are of limited use in this driver, presently, yet the CONFIG_DEBUG_FS guard seems a bit strange imho. Cheers, Emil [1] http://blog.ffwll.ch/2014/11/atomic-modeset-support-for-kms-drivers.html [2] http://blog.ffwll.ch/2015/01/update-for-atomic-display-updates.html -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
