On Tuesday, April 19, 2016 2:27:17 PM CDT Dennis Gilmore wrote: > On Tuesday, April 19, 2016 7:50:49 PM CDT Russell King - ARM Linux wrote: > > On Tue, Apr 19, 2016 at 01:34:23PM -0500, Dennis Gilmore wrote: > > > Hi All, > > > > > > on all of my i.MX6 systems imx-ipuv3-crtc ius not getting automatically > > > loaded. Everything is built as a module > > > > > > CONFIG_DRM_IMX=m > > > CONFIG_DRM_IMX_FB_HELPER=m > > > CONFIG_DRM_IMX_HDMI=m > > > CONFIG_DRM_IMX_IPUV3=m > > > CONFIG_DRM_IMX_LDB=m > > > CONFIG_DRM_IMX_PARALLEL_DISPLAY=m > > > CONFIG_DRM_IMX_TVE=m > > > CONFIG_IMX_IPUV3_CORE=m > > > > > > The result is that until I log in via serial or ssh and modprobe the > > > module there is no display. I suspect that there is some devicetree > > > glue missing 4.4 and 4.5 seem to both be effected. > > > > DT doesn't come into it for imx-ipuv3-crtc - these platform devices are > > created by drivers/gpu/ipu-v3/ipu-common.c itself. > > > > drivers/gpu/drm/imx/ipuv3-crtc.c contains the proper module alias which > > should result in the module loaded at boot time when the imx-ipuv3-crtc > > devices are created. > > > > Could the problem be that imx-ipu-v3 isn't being loaded? However, again, > > it looks to me like everything is correct there. > > > > Are you saying that this used to work in older kernel versions like 4.3, > > but stopped in 4.4? > > yers it used to work and stopped working. I would need to go back and test > old kernels to figure out where it broke. after installing some old kernels it broke with 4.4-rc4 which included a patch with teh subject of "drm/imx: Remove of_node assignment from ipuv3-crtc driver probe" Dennis
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