Hi all, This is something I kinda had on my todo list ever since atomic landed. The legacy_backoff() hack really doesn't work if you need to acquire additional locks, which does restrict drivers in how they handle and protect legacy paths, and kinda forces us to be overzealous with taking locks for legacy paths, just in case. This patch set here fixes this, with 2 huge exceptions: - get/set_property calls aren't fixed. The locking in there is a mess and needs some serious attention. My goal would be that for atomic we take no lock at all, and entirely rely upon the magic of drm_modeset_lock and atomic to just grab the minimal set required to update a property. - fbdev emulation helpers. It abused the modeset_lock_all bkl as its own lock, which prevents us from pushing it down just around the (atomic) modeset calls, and hence from switching over to handling the acquire context in an explicit fashion. Thierry started to fix this with the addition of proper locking for fbdev emulation, but it needs a pile more work. Survived light testing with full ww mutex debugging, I'll rely on CI to catch the remaining mixups :-) Cheers, Daniel Daniel Vetter (19): drm: Wire up proper acquire ctx for plane functions drm: Add acquire ctx parameter to ->update_plane drm: drm_plane_force_disable is not for atomic drivers drm: Add acquire ctx parameter to ->plane_disable drm/atomic-helper: remove backoff hack from disable/update_plane drm/vmwgfx: Drop the cursor locking hack drm/tegra: Don't use modeset_lock_crtc drm/tilcdc: Drop calls to modeset_lock_crtc drm: Make drm_modeset_lock_crtc internal drm: Roll out acquire context for the page_flip ioctl drm: Add acquire ctx parameter to ->page_flip(_target) drm/atomic-helper: remove backoff hack from page_flip drm: simplify the locking in the GETCRTC ioctl drm: Remove drm_modeset_(un)lock_crtc drm: Remove drm_modeset_legacy_acquire_ctx and crtc->acquire_ctx drm: Restrict drm_mode_set_config_internal to non-atomic drivers drm: Add explicit acquire ctx handling around ->set_config drm: Add acquire ctx parameter to ->set_config drm/atomic-helper: Remove the backoff hack from set_config drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 8 +- drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 6 +- drivers/gpu/drm/armada/armada_crtc.c | 3 +- drivers/gpu/drm/armada/armada_overlay.c | 6 +- drivers/gpu/drm/bochs/bochs_kms.c | 3 +- drivers/gpu/drm/drm_atomic.c | 14 --- drivers/gpu/drm/drm_atomic_helper.c | 132 +++++----------------------- drivers/gpu/drm/drm_crtc.c | 61 ++++++++----- drivers/gpu/drm/drm_crtc_helper.c | 4 +- drivers/gpu/drm/drm_modeset_lock.c | 102 --------------------- drivers/gpu/drm/drm_plane.c | 87 ++++++++++++++---- drivers/gpu/drm/drm_plane_helper.c | 11 ++- drivers/gpu/drm/gma500/gma_display.c | 7 +- drivers/gpu/drm/gma500/gma_display.h | 3 +- drivers/gpu/drm/i915/intel_display.c | 9 +- drivers/gpu/drm/i915/intel_pipe_crc.c | 2 +- drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c | 8 +- drivers/gpu/drm/nouveau/dispnv04/crtc.c | 7 +- drivers/gpu/drm/nouveau/dispnv04/overlay.c | 18 ++-- drivers/gpu/drm/nouveau/nouveau_display.c | 3 +- drivers/gpu/drm/nouveau/nouveau_display.h | 4 +- drivers/gpu/drm/radeon/radeon_display.c | 8 +- drivers/gpu/drm/shmobile/shmob_drm_crtc.c | 3 +- drivers/gpu/drm/shmobile/shmob_drm_plane.c | 8 +- drivers/gpu/drm/tegra/dc.c | 8 +- drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 12 +-- drivers/gpu/drm/udl/udl_modeset.c | 3 +- drivers/gpu/drm/vc4/vc4_crtc.c | 5 +- drivers/gpu/drm/vc4/vc4_plane.c | 6 +- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 25 ------ drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c | 3 +- drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c | 6 +- drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c | 6 +- include/drm/drm_atomic_helper.h | 15 ++-- include/drm/drm_crtc.h | 18 ++-- include/drm/drm_crtc_helper.h | 3 +- include/drm/drm_modeset_lock.h | 5 -- include/drm/drm_plane.h | 7 +- include/drm/drm_plane_helper.h | 6 +- 39 files changed, 265 insertions(+), 380 deletions(-) -- 2.11.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
