From cb8f81c1753187995b7a43e79c12959f14eb32d3 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Tue, 6 Aug 2024 12:50:44 +0200 Subject: [PATCH] drm/xe/display: Make display suspend/resume work on discrete We should unpin before evicting all memory, and repin after GT resume. This way, we preserve the contents of the framebuffers, and won't hang on resume due to migration engine not being restored yet. Signed-off-by: Maarten Lankhorst Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs") Cc: stable@vger.kernel.org # v6.8+ Reviewed-by: Uma Shankar Link: https://patchwork.freedesktop.org/patch/msgid/20240806105044.596842-3-maarten.lankhorst@linux.intel.com Signed-off-by: Maarten Lankhorst,,, --- drivers/gpu/drm/xe/display/xe_display.c | 23 +++++++++++++++++++++++ drivers/gpu/drm/xe/xe_pm.c | 11 ++++++----- 2 files changed, 29 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/xe/display/xe_display.c b/drivers/gpu/drm/xe/display/xe_display.c index 8b4fd90a9c351..30dfdac9f6fa9 100644 --- a/drivers/gpu/drm/xe/display/xe_display.c +++ b/drivers/gpu/drm/xe/display/xe_display.c @@ -287,6 +287,27 @@ static bool suspend_to_idle(void) return false; } +static void xe_display_flush_cleanup_work(struct xe_device *xe) +{ + struct intel_crtc *crtc; + + for_each_intel_crtc(&xe->drm, crtc) { + struct drm_crtc_commit *commit; + + spin_lock(&crtc->base.commit_lock); + commit = list_first_entry_or_null(&crtc->base.commit_list, + struct drm_crtc_commit, commit_entry); + if (commit) + drm_crtc_commit_get(commit); + spin_unlock(&crtc->base.commit_lock); + + if (commit) { + wait_for_completion(&commit->cleanup_done); + drm_crtc_commit_put(commit); + } + } +} + void xe_display_pm_suspend(struct xe_device *xe, bool runtime) { struct intel_display *display = &xe->display; @@ -308,6 +329,8 @@ void xe_display_pm_suspend(struct xe_device *xe, bool runtime) if (!runtime) intel_display_driver_suspend(xe); + xe_display_flush_cleanup_work(xe); + intel_dp_mst_suspend(xe); intel_hpd_cancel_work(xe); diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c index 9f3c14fd9f337..fcfb49af8c891 100644 --- a/drivers/gpu/drm/xe/xe_pm.c +++ b/drivers/gpu/drm/xe/xe_pm.c @@ -93,13 +93,13 @@ int xe_pm_suspend(struct xe_device *xe) for_each_gt(gt, xe, id) xe_gt_suspend_prepare(gt); + xe_display_pm_suspend(xe, false); + /* FIXME: Super racey... */ err = xe_bo_evict_all(xe); if (err) goto err; - xe_display_pm_suspend(xe, false); - for_each_gt(gt, xe, id) { err = xe_gt_suspend(gt); if (err) { @@ -154,11 +154,11 @@ int xe_pm_resume(struct xe_device *xe) xe_irq_resume(xe); - xe_display_pm_resume(xe, false); - for_each_gt(gt, xe, id) xe_gt_resume(gt); + xe_display_pm_resume(xe, false); + err = xe_bo_restore_user(xe); if (err) goto err; @@ -367,10 +367,11 @@ int xe_pm_runtime_suspend(struct xe_device *xe) mutex_unlock(&xe->mem_access.vram_userfault.lock); if (xe->d3cold.allowed) { + xe_display_pm_suspend(xe, true); + err = xe_bo_evict_all(xe); if (err) goto out; - xe_display_pm_suspend(xe, true); } for_each_gt(gt, xe, id) {