[PATCH xf86-video-ati 4/5] Add radeon_drm_wait_pending_flip function
Michel Dänzer
michel at daenzer.net
Thu Aug 16 16:19:41 UTC 2018
From: Michel Dänzer <michel.daenzer at amd.com>
Replacing the drmmode_crtc_wait_pending_event macro.
(Ported from amdgpu commit 6029794e8a35417faf825491a89b85f713c77fc1)
Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
src/drmmode_display.c | 18 ++++++++++++------
src/drmmode_display.h | 4 ++++
src/radeon_drm_queue.c | 41 +++++++++++++++++++++++++++++++++++++++--
src/radeon_drm_queue.h | 1 +
4 files changed, 56 insertions(+), 8 deletions(-)
diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index c022b3e4f..a55cd08a0 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -324,6 +324,9 @@ drmmode_do_crtc_dpms(xf86CrtcPtr crtc, int mode)
nominal_frame_rate /= pix_in_frame;
drmmode_crtc->dpms_last_fps = nominal_frame_rate;
}
+
+ drmmode_crtc->dpms_mode = mode;
+ radeon_drm_queue_handle_deferred(crtc);
} else if (drmmode_crtc->dpms_mode != DPMSModeOn && mode == DPMSModeOn) {
/*
* Off->On transition: calculate and accumulate the
@@ -341,8 +344,9 @@ drmmode_do_crtc_dpms(xf86CrtcPtr crtc, int mode)
drmmode_crtc->interpolated_vblanks += delta_seq;
}
+
+ drmmode_crtc->dpms_mode = DPMSModeOn;
}
- drmmode_crtc->dpms_mode = mode;
}
static void
@@ -972,6 +976,7 @@ done:
}
}
+ radeon_drm_queue_handle_deferred(crtc);
return ret;
}
@@ -1763,11 +1768,6 @@ drmmode_output_set_tear_free(RADEONEntPtr pRADEONEnt,
drmmode_output->tear_free = tear_free;
if (crtc) {
- /* Wait for pending flips before drmmode_set_mode_major calls
- * drmmode_crtc_update_tear_free, to prevent a nested
- * drmHandleEvent call, which would hang
- */
- radeon_drm_wait_pending_flip(crtc);
drmmode_set_mode_major(crtc, &crtc->mode, crtc->rotation,
crtc->x, crtc->y);
}
@@ -3278,6 +3278,7 @@ Bool radeon_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
drmmode_crtc_private_ptr drmmode_crtc = config->crtc[0]->driver_private;
uint32_t flip_flags = flip_sync == FLIP_ASYNC ? DRM_MODE_PAGE_FLIP_ASYNC : 0;
drmmode_flipdata_ptr flipdata;
+ Bool handle_deferred = FALSE;
uintptr_t drm_queue_seq = 0;
struct drmmode_fb *fb;
int i = 0;
@@ -3360,6 +3361,7 @@ Bool radeon_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
if (drmmode_crtc->scanout_update_pending) {
radeon_drm_wait_pending_flip(crtc);
+ handle_deferred = TRUE;
radeon_drm_abort_entry(drmmode_crtc->scanout_update_pending);
drmmode_crtc->scanout_update_pending = 0;
}
@@ -3395,6 +3397,8 @@ Bool radeon_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
drm_queue_seq = 0;
}
+ if (handle_deferred)
+ radeon_drm_queue_handle_deferred(ref_crtc);
if (flipdata->flip_count > 0)
return TRUE;
@@ -3414,5 +3418,7 @@ error:
xf86DrvMsg(scrn->scrnIndex, X_WARNING, "Page flip failed: %s\n",
strerror(errno));
+ if (handle_deferred)
+ radeon_drm_queue_handle_deferred(ref_crtc);
return FALSE;
}
diff --git a/src/drmmode_display.h b/src/drmmode_display.h
index 46449c8e3..a039bf8fb 100644
--- a/src/drmmode_display.h
+++ b/src/drmmode_display.h
@@ -103,6 +103,10 @@ typedef struct {
* modeset)
*/
Bool need_modeset;
+ /* For keeping track of nested calls to drm_wait_pending_flip /
+ * drm_queue_handle_deferred
+ */
+ int wait_flip_nesting_level;
/* A flip to this FB is pending for this CRTC */
struct drmmode_fb *flip_pending;
/* The FB currently being scanned out by this CRTC, if any */
diff --git a/src/radeon_drm_queue.c b/src/radeon_drm_queue.c
index 3d2f4d157..857278fdd 100644
--- a/src/radeon_drm_queue.c
+++ b/src/radeon_drm_queue.c
@@ -117,6 +117,30 @@ radeon_drm_vblank_handler(int fd, unsigned int frame, unsigned int sec,
user_ptr);
}
+/*
+ * Handle deferred DRM vblank events
+ *
+ * This function must be called after radeon_drm_wait_pending_flip, once
+ * it's safe to attempt queueing a flip again
+ */
+void
+radeon_drm_queue_handle_deferred(xf86CrtcPtr crtc)
+{
+ drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
+ struct radeon_drm_queue_entry *e, *tmp;
+
+ if (drmmode_crtc->wait_flip_nesting_level == 0 ||
+ --drmmode_crtc->wait_flip_nesting_level > 0)
+ return;
+
+ xorg_list_for_each_entry_safe(e, tmp, &radeon_drm_vblank_signalled, list) {
+ drmmode_crtc_private_ptr drmmode_crtc = e->crtc->driver_private;
+
+ if (drmmode_crtc->wait_flip_nesting_level == 0)
+ radeon_drm_queue_handle_one(e);
+ }
+}
+
/*
* Enqueue a potential drm response; when the associated response
* appears, we've got data to pass to the handler from here
@@ -191,6 +215,13 @@ radeon_drm_abort_entry(uintptr_t seq)
if (seq == RADEON_DRM_QUEUE_ERROR)
return;
+ xorg_list_for_each_entry_safe(e, tmp, &radeon_drm_vblank_signalled, list) {
+ if (e->seq == seq) {
+ radeon_drm_abort_one(e);
+ return;
+ }
+ }
+
xorg_list_for_each_entry_safe(e, tmp, &radeon_drm_queue, list) {
if (e->seq == seq) {
radeon_drm_abort_one(e);
@@ -229,8 +260,12 @@ radeon_drm_handle_event(int fd, drmEventContext *event_context)
xorg_list_for_each_entry_safe(e, tmp, &radeon_drm_flip_signalled, list)
radeon_drm_queue_handle_one(e);
- xorg_list_for_each_entry_safe(e, tmp, &radeon_drm_vblank_signalled, list)
- radeon_drm_queue_handle_one(e);
+ xorg_list_for_each_entry_safe(e, tmp, &radeon_drm_vblank_signalled, list) {
+ drmmode_crtc_private_ptr drmmode_crtc = e->crtc->driver_private;
+
+ if (drmmode_crtc->wait_flip_nesting_level == 0)
+ radeon_drm_queue_handle_one(e);
+ }
return r;
}
@@ -244,6 +279,8 @@ void radeon_drm_wait_pending_flip(xf86CrtcPtr crtc)
RADEONEntPtr pRADEONEnt = RADEONEntPriv(crtc->scrn);
struct radeon_drm_queue_entry *e, *tmp;
+ drmmode_crtc->wait_flip_nesting_level++;
+
xorg_list_for_each_entry_safe(e, tmp, &radeon_drm_flip_signalled, list)
radeon_drm_queue_handle_one(e);
diff --git a/src/radeon_drm_queue.h b/src/radeon_drm_queue.h
index 593433613..334c4ca63 100644
--- a/src/radeon_drm_queue.h
+++ b/src/radeon_drm_queue.h
@@ -40,6 +40,7 @@ typedef void (*radeon_drm_handler_proc)(xf86CrtcPtr crtc, uint32_t seq,
uint64_t usec, void *data);
typedef void (*radeon_drm_abort_proc)(xf86CrtcPtr crtc, void *data);
+void radeon_drm_queue_handle_deferred(xf86CrtcPtr crtc);
uintptr_t radeon_drm_queue_alloc(xf86CrtcPtr crtc, ClientPtr client,
uint64_t id, void *data,
radeon_drm_handler_proc handler,
--
2.18.0
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