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Antonio Borneo c90fccc256 backend-drm: fix race during system suspend ... Depending on system loading, weston-launcher could drop the drm master access before the compositor and all the clients receive the notification. In this case, some commit could be sent to the drm driver too late and get refused with error EACCES. This error condition is not properly managed and causes weston to hang. Change the return type of start_repaint_loop() and repaint_flush() from void to int, and return 0 on success or -1 if the repaint has to be cancelled. In the callers of start_repaint_loop() and repaint_flush() handle the return value and cancel the repaint when needed. In backend-drm detect the error EACCES and return -1. Note: to keep the code cleaner, this change inverts the execution order between weston_output_schedule_repaint_reset() and repaint_cancel(). No need to wait for suspend or for any notification; in case the weston reschedules a repaint, it will get EACCES again. At resume, damage-all guarantees a complete repaint. This fix is for atomic modeset only. Legacy modeset suffers from similar problems, but it is not fixed by this change. Since drm_pending_state_apply() never returns error for legacy modeset, this change has no impact on legacy modeset. Signed-off-by: Antonio Borneo <antonio.borneo@st.com> Fixes: https://gitlab.freedesktop.org/wayland/weston/issues/117		5 years ago
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drm-internal.h	backend-drm: get handle in gbm specific code	5 years ago
drm.c	backend-drm: fix race during system suspend	5 years ago
fb.c	backend-drm: drop gbm.h from c files	5 years ago
kms.c	backend-drm: get handle in gbm specific code	5 years ago
libbacklight.c	backend-drm: move into new subdir	6 years ago
libbacklight.h	backend-drm: move into new subdir	6 years ago
meson.build	compositor-drm: Split assign_planes() into separate file	5 years ago
modes.c	compositor-drm: Move mode handling to separate file	5 years ago
state-helpers.c	compositor-drm: Move state helpers to separate file	5 years ago
state-propose.c	compositor-drm: Split assign_planes() into separate file	5 years ago
vaapi-recorder.c	backend-drm: move into new subdir	6 years ago
vaapi-recorder.h	backend-drm: move into new subdir	6 years ago