2019-09-19 14:43:19 +00:00
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From 562e0c66203a4f679c6adf6c0df91f7233df53b1 Mon Sep 17 00:00:00 2001
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2019-07-09 18:32:28 +00:00
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From: Eric Anholt <eric@anholt.net>
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Date: Thu, 2 Feb 2017 09:42:18 -0800
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2019-12-23 12:42:55 +00:00
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Subject: [PATCH] drm/vc4: Fix sending of page flip completion events
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2019-07-09 18:32:28 +00:00
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in FKMS mode.
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In the rewrite of vc4_crtc.c for fkms, I dropped the part of the
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CRTC's atomic flush handler that moved the completion event from the
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proposed atomic state change to the CRTC's current state. That meant
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that when full screen pageflipping happened (glxgears -fullscreen in
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X, compton, por weston), the app would end up blocked firever waiting
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to draw its next frame.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/vc4/vc4_firmware_kms.c | 15 +++++++++++++++
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1 file changed, 15 insertions(+)
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--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
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+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
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@@ -336,6 +336,21 @@ static int vc4_crtc_atomic_check(struct
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static void vc4_crtc_atomic_flush(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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+ struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
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+ struct drm_device *dev = crtc->dev;
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+
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+ if (crtc->state->event) {
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+ unsigned long flags;
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+
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+ crtc->state->event->pipe = drm_crtc_index(crtc);
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+
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+ WARN_ON(drm_crtc_vblank_get(crtc) != 0);
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+
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+ spin_lock_irqsave(&dev->event_lock, flags);
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+ vc4_crtc->event = crtc->state->event;
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+ crtc->state->event = NULL;
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+ spin_unlock_irqrestore(&dev->event_lock, flags);
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+ }
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}
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static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc)
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