From 5c30b9d79ca60fe260d86264c4ca4a579fd5def1 Mon Sep 17 00:00:00 2001 From: Jeffy Chen Date: Wed, 27 Apr 2022 15:17:39 +0800 Subject: [PATCH 63/95] backend-drm: Stop disabling unused CRTCs by default So that we can launch multiple weston instances for different monitors. Set env "WESTON_DRM_MASTER" to take charge of all CRTCs again. Signed-off-by: Jeffy Chen --- libweston/backend-drm/drm-internal.h | 1 + libweston/backend-drm/drm.c | 8 ++++++++ libweston/backend-drm/kms.c | 7 ++++--- 3 files changed, 13 insertions(+), 3 deletions(-) diff --git a/libweston/backend-drm/drm-internal.h b/libweston/backend-drm/drm-internal.h index b7deeb0..46edbc6 100644 --- a/libweston/backend-drm/drm-internal.h +++ b/libweston/backend-drm/drm-internal.h @@ -356,6 +356,7 @@ struct drm_backend { int64_t last_resize_ms; int64_t resize_freeze_ms; + bool master; bool single_head; bool head_fallback; bool head_fallback_all; diff --git a/libweston/backend-drm/drm.c b/libweston/backend-drm/drm.c index cb40715..05ae2c1 100644 --- a/libweston/backend-drm/drm.c +++ b/libweston/backend-drm/drm.c @@ -2333,6 +2333,10 @@ drm_output_detach_crtc(struct drm_output *output) crtc->output = NULL; output->crtc = NULL; + + /* HACK: Do it here rather than in the kms.c for drm-master config */ + drmModeSetCrtc(crtc->device->drm.fd, + crtc->crtc_id, 0, 0, 0, NULL, 0, NULL); } static int @@ -4257,6 +4261,10 @@ drm_backend_create(struct weston_compositor *compositor, if (b == NULL) return NULL; + buf = getenv("WESTON_DRM_MASTER"); + if (buf && buf[0] == '1') + b->master = true; + buf = getenv("WESTON_DRM_SINGLE_HEAD"); if (buf && buf[0] == '1') b->single_head = true; diff --git a/libweston/backend-drm/kms.c b/libweston/backend-drm/kms.c index 607bf70..38ecf68 100644 --- a/libweston/backend-drm/kms.c +++ b/libweston/backend-drm/kms.c @@ -1217,7 +1217,7 @@ drm_pending_state_apply_atomic(struct drm_pending_state *pending_state, break; } - if (device->state_invalid) { + if (device->state_invalid && b->master) { struct weston_head *head_base; struct drm_head *head; struct drm_crtc *crtc; @@ -1417,7 +1417,7 @@ drm_pending_state_apply(struct drm_pending_state *pending_state) return drm_pending_state_apply_atomic(pending_state, DRM_STATE_APPLY_ASYNC); - if (device->state_invalid) { + if (device->state_invalid && b->master) { /* If we need to reset all our state (e.g. because we've * just started, or just been VT-switched in), explicitly * disable all the CRTCs we aren't using. This also disables @@ -1476,6 +1476,7 @@ int drm_pending_state_apply_sync(struct drm_pending_state *pending_state) { struct drm_device *device = pending_state->device; + struct drm_backend *b = device->backend; struct drm_output_state *output_state, *tmp; struct drm_crtc *crtc; int has_error = 0; @@ -1484,7 +1485,7 @@ drm_pending_state_apply_sync(struct drm_pending_state *pending_state) return drm_pending_state_apply_atomic(pending_state, DRM_STATE_APPLY_SYNC); - if (device->state_invalid) { + if (device->state_invalid && b->master) { /* If we need to reset all our state (e.g. because we've * just started, or just been VT-switched in), explicitly * disable all the CRTCs we aren't using. This also disables -- 2.20.1