You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
3.2 KiB
Diff
101 lines
3.2 KiB
Diff
From a82d716ab4c2ab5f198f3461e32614defb52c724 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
Date: Thu, 25 Jul 2019 17:27:44 +0100
|
|
Subject: [PATCH] drm/vc4: Resolve the vblank warnings on mode
|
|
switching
|
|
|
|
The details over when and how a driver is to service the
|
|
vblank events are sketchy, and the fkms driver was triggering
|
|
a kernel warning every time the crtc was enabled or disabled.
|
|
|
|
Copy the event handling as used by the vc4-kms driver slightly
|
|
more closely, and we avoid the warnings.
|
|
|
|
https://github.com/raspberrypi/linux/issues/3020
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_firmware_kms.c | 48 ++++++++++++++++++--------
|
|
1 file changed, 33 insertions(+), 15 deletions(-)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
|
|
@@ -964,6 +964,7 @@ static void vc4_crtc_mode_set_nofb(struc
|
|
|
|
static void vc4_crtc_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
|
|
{
|
|
+ struct drm_device *dev = crtc->dev;
|
|
struct drm_plane *plane;
|
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] vblanks off.\n",
|
|
@@ -979,6 +980,35 @@ static void vc4_crtc_disable(struct drm_
|
|
|
|
drm_atomic_crtc_for_each_plane(plane, crtc)
|
|
vc4_plane_atomic_disable(plane, plane->state);
|
|
+
|
|
+ /*
|
|
+ * Make sure we issue a vblank event after disabling the CRTC if
|
|
+ * someone was waiting it.
|
|
+ */
|
|
+ if (crtc->state->event) {
|
|
+ unsigned long flags;
|
|
+
|
|
+ spin_lock_irqsave(&dev->event_lock, flags);
|
|
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
|
|
+ crtc->state->event = NULL;
|
|
+ spin_unlock_irqrestore(&dev->event_lock, flags);
|
|
+ }
|
|
+}
|
|
+
|
|
+static void vc4_crtc_consume_event(struct drm_crtc *crtc)
|
|
+{
|
|
+ struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
|
|
+ struct drm_device *dev = crtc->dev;
|
|
+ unsigned long flags;
|
|
+
|
|
+ crtc->state->event->pipe = drm_crtc_index(crtc);
|
|
+
|
|
+ WARN_ON(drm_crtc_vblank_get(crtc) != 0);
|
|
+
|
|
+ spin_lock_irqsave(&dev->event_lock, flags);
|
|
+ vc4_crtc->event = crtc->state->event;
|
|
+ crtc->state->event = NULL;
|
|
+ spin_unlock_irqrestore(&dev->event_lock, flags);
|
|
}
|
|
|
|
static void vc4_crtc_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
|
|
@@ -988,6 +1018,7 @@ static void vc4_crtc_enable(struct drm_c
|
|
DRM_DEBUG_KMS("[CRTC:%d] vblanks on.\n",
|
|
crtc->base.id);
|
|
drm_crtc_vblank_on(crtc);
|
|
+ vc4_crtc_consume_event(crtc);
|
|
|
|
/* Unblank the planes (if they're supposed to be displayed). */
|
|
drm_atomic_crtc_for_each_plane(plane, crtc)
|
|
@@ -1059,23 +1090,10 @@ static int vc4_crtc_atomic_check(struct
|
|
static void vc4_crtc_atomic_flush(struct drm_crtc *crtc,
|
|
struct drm_crtc_state *old_state)
|
|
{
|
|
- struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
|
|
- struct drm_device *dev = crtc->dev;
|
|
-
|
|
DRM_DEBUG_KMS("[CRTC:%d] crtc_atomic_flush.\n",
|
|
crtc->base.id);
|
|
- if (crtc->state->event) {
|
|
- unsigned long flags;
|
|
-
|
|
- crtc->state->event->pipe = drm_crtc_index(crtc);
|
|
-
|
|
- WARN_ON(drm_crtc_vblank_get(crtc) != 0);
|
|
-
|
|
- spin_lock_irqsave(&dev->event_lock, flags);
|
|
- vc4_crtc->event = crtc->state->event;
|
|
- crtc->state->event = NULL;
|
|
- spin_unlock_irqrestore(&dev->event_lock, flags);
|
|
- }
|
|
+ if (crtc->state->active && old_state->active && crtc->state->event)
|
|
+ vc4_crtc_consume_event(crtc);
|
|
}
|
|
|
|
static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc)
|