From: Michel Dänzer <michel.daenzer@xxxxxxx>
We were only storing the FB provided by the client, but on CRTCs with
TearFree enabled, we use a separate FB. This could cause
drmmode_flip_handler to fail to clear drmmode_crtc->flip_pending, which
could result in a hang when waiting for the pending flip to complete. We
were trying to avoid that by always clearing drmmode_crtc->flip_pending
when TearFree is enabled, but that wasn't reliable, because
drmmode_crtc->tear_free can already be FALSE at this point when
disabling TearFree.
Now that we're keeping track of each CRTC's flip FB separately,
drmmode_flip_handler can reliably clear flip_pending, and we no longer
need the TearFree hack.
Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
src/drmmode_display.c | 47 ++++++++++++++++++++++++-------------------
src/drmmode_display.h | 2 +-
2 files changed, 27 insertions(+), 22 deletions(-)
diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 92f58c157..e58e15d7b 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -3051,17 +3051,21 @@ drmmode_flip_abort(xf86CrtcPtr crtc, void *event_data)
drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
AMDGPUEntPtr pAMDGPUEnt = AMDGPUEntPriv(crtc->scrn);
drmmode_flipdata_ptr flipdata = event_data;
+ int crtc_id = drmmode_get_crtc_id(crtc);
+ struct drmmode_fb **fb = &flipdata->fb[crtc_id];
+
+ if (drmmode_crtc->flip_pending == *fb) {
+ drmmode_fb_reference(pAMDGPUEnt->fd, &drmmode_crtc->flip_pending,
+ NULL);
+ }
+ drmmode_fb_reference(pAMDGPUEnt->fd, fb, NULL);
if (--flipdata->flip_count == 0) {
if (!flipdata->fe_crtc)
flipdata->fe_crtc = crtc;
flipdata->abort(flipdata->fe_crtc, flipdata->event_data);
- drmmode_fb_reference(pAMDGPUEnt->fd, &flipdata->fb, NULL);
free(flipdata);
}
-
- drmmode_fb_reference(pAMDGPUEnt->fd, &drmmode_crtc->flip_pending,
- NULL);
}
static void
@@ -3070,6 +3074,8 @@ drmmode_flip_handler(xf86CrtcPtr crtc, uint32_t frame, uint64_t usec, void *even
AMDGPUEntPtr pAMDGPUEnt = AMDGPUEntPriv(crtc->scrn);
drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
drmmode_flipdata_ptr flipdata = event_data;
+ int crtc_id = drmmode_get_crtc_id(crtc);
+ struct drmmode_fb **fb = &flipdata->fb[crtc_id];
/* Is this the event whose info shall be delivered to higher level? */
if (crtc == flipdata->fe_crtc) {
@@ -3078,13 +3084,12 @@ drmmode_flip_handler(xf86CrtcPtr crtc, uint32_t frame, uint64_t usec, void *even
flipdata->fe_usec = usec;
}
- drmmode_fb_reference(pAMDGPUEnt->fd, &drmmode_crtc->fb,
- flipdata->fb);
- if (drmmode_crtc->tear_free ||
- drmmode_crtc->flip_pending == flipdata->fb) {
+ if (drmmode_crtc->flip_pending == *fb) {
drmmode_fb_reference(pAMDGPUEnt->fd,
&drmmode_crtc->flip_pending, NULL);
}
+ drmmode_fb_reference(pAMDGPUEnt->fd, &drmmode_crtc->fb, *fb);
+ drmmode_fb_reference(pAMDGPUEnt->fd, fb, NULL);
if (--flipdata->flip_count == 0) {
/* Deliver MSC & UST from reference/current CRTC to flip event
@@ -3096,7 +3101,6 @@ drmmode_flip_handler(xf86CrtcPtr crtc, uint32_t frame, uint64_t usec, void *even
else
flipdata->handler(crtc, frame, usec, flipdata->event_data);
- drmmode_fb_reference(pAMDGPUEnt->fd, &flipdata->fb, NULL);
free(flipdata);
}
}
@@ -3875,21 +3879,22 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CrtcPtr crtc = NULL;
drmmode_crtc_private_ptr drmmode_crtc = config->crtc[0]->driver_private;
- int i;
uint32_t flip_flags = flip_sync == FLIP_ASYNC ? DRM_MODE_PAGE_FLIP_ASYNC : 0;
drmmode_flipdata_ptr flipdata;
uintptr_t drm_queue_seq = 0;
+ struct drmmode_fb *fb;
+ int i = 0;
- flipdata = calloc(1, sizeof(drmmode_flipdata_rec));
+ flipdata = calloc(1, sizeof(*flipdata) + config->num_crtc *
+ sizeof(flipdata->fb[0]));
if (!flipdata) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"flip queue: data alloc failed.\n");
goto error;
}
- drmmode_fb_reference(pAMDGPUEnt->fd, &flipdata->fb,
- amdgpu_pixmap_get_fb(new_front));
- if (!flipdata->fb) {
+ fb = amdgpu_pixmap_get_fb(new_front);
+ if (!fb) {
ErrorF("Failed to get FB for flip\n");
goto error;
}
@@ -3910,8 +3915,6 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
flipdata->fe_crtc = ref_crtc;
for (i = 0; i < config->num_crtc; i++) {
- struct drmmode_fb *fb = flipdata->fb;
-
crtc = config->crtc[i];
drmmode_crtc = crtc->driver_private;
@@ -3947,8 +3950,9 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
goto next;
}
- fb = amdgpu_pixmap_get_fb(drmmode_crtc->scanout[scanout_id].pixmap);
- if (!fb) {
+ drmmode_fb_reference(pAMDGPUEnt->fd, &flipdata->fb[i],
+ amdgpu_pixmap_get_fb(drmmode_crtc->scanout[scanout_id].pixmap));
+ if (!flipdata->fb[i]) {
ErrorF("Failed to get FB for TearFree flip\n");
goto error;
}
@@ -3963,6 +3967,8 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
amdgpu_drm_abort_entry(drmmode_crtc->scanout_update_pending);
drmmode_crtc->scanout_update_pending = 0;
}
+ } else {
+ drmmode_fb_reference(pAMDGPUEnt->fd, &flipdata->fb[i], fb);
}
if (crtc == ref_crtc) {
@@ -3988,8 +3994,8 @@ Bool amdgpu_do_pageflip(ScrnInfoPtr scrn, ClientPtr client,
}
next:
- drmmode_fb_reference(pAMDGPUEnt->fd,
- &drmmode_crtc->flip_pending, fb);
+ drmmode_fb_reference(pAMDGPUEnt->fd, &drmmode_crtc->flip_pending,
+ flipdata->fb[i]);
drm_queue_seq = 0;
}
@@ -4007,7 +4013,6 @@ error:
drmmode_flip_abort(crtc, flipdata);
else {
abort(NULL, data);
- drmmode_fb_reference(pAMDGPUEnt->fd, &flipdata->fb, NULL);
free(flipdata);
}
diff --git a/src/drmmode_display.h b/src/drmmode_display.h
index 8b949f79d..5618c6b40 100644
--- a/src/drmmode_display.h
+++ b/src/drmmode_display.h
@@ -74,7 +74,6 @@ typedef struct {
} drmmode_rec, *drmmode_ptr;
typedef struct {
- struct drmmode_fb *fb;
void *event_data;
int flip_count;
unsigned int fe_frame;
@@ -82,6 +81,7 @@ typedef struct {
xf86CrtcPtr fe_crtc;
amdgpu_drm_handler_proc handler;
amdgpu_drm_abort_proc abort;
+ struct drmmode_fb *fb[0];
} drmmode_flipdata_rec, *drmmode_flipdata_ptr;
struct drmmode_fb {
--
2.18.0
