On Thursday, November 17, 2016 4:14:44 AM CET Build bot for Mark Brown wrote:
arm64-allmodconfig../drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c:126:36: error: 'OD_CFG' undeclared (first use in this function) ../drivers/gpu/drm/mediatek/mtk_drm_drv.c:220:5: error: 'struct drm_device' has no member named 'vblank_disable_allowed'
arm-allmodconfig../drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c:126:36: error: 'OD_CFG' undeclared (first use in this function) ../drivers/gpu/drm/mediatek/mtk_drm_drv.c:220:5: error: 'struct drm_device' has no member named 'vblank_disable_allowed'
These two patches need to be reverted or fixed:
f752fff ("drm/mediatek: set vblank_disable_allowed to true") 83ba62b ("drm/mediatek: fix a typo of OD_CFG to OD_RELAYMODE")
Both of them seem to work fine on linux-next, but were accidentally sent to Linus yesterday through:
Merge tag 'drm-fixes-for-v4.9-rc6' of git://people.freedesktop.org/~airlied/linux Merge branch 'mediatek-drm-fixes-2016-11-11' of https://github.com/ckhu-mediatek/linux.git-tags into drm-fixes
Clearly that branch has never been build-tested by itself. Unfortunately the dependency on "HAVE_ARM_SMCCC" caused the driver to not be no longer included in x86 allmodconfig builds despite the COMPILE_TEST check, so neither David Airlie nor Linus Torvalds caught it before it got merged.
Arnd