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Handle pending scanout update in drmmode_crtc_scanout_free

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We have to wait for a pending scanout flip or abort a pending scanout
update, otherwise the corresponding event handler will likely crash
after drmmode_crtc_scanout_free cleaned up the data structures.

Fixes crash after VT switch while dedicated scanout pixmaps are enabled
for any CRTC.

(Ported from amdgpu commit 0cd2c337d2c02b8ec2bd994d6124b4aaaad10741)
This commit is contained in:
Michel Dänzer
2018-10-24 18:14:02 +02:00
parent f892d37912
commit 86fe8d27b9
3 changed files with 18 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/drmmode_display.c
View File

@@ -508,8 +508,17 @@ drmmode_crtc_scanout_destroy(drmmode_ptr drmmode,
}
void
drmmode_crtc_scanout_free(drmmode_crtc_private_ptr drmmode_crtc)
drmmode_crtc_scanout_free(xf86CrtcPtr crtc)
{
drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
if (drmmode_crtc->scanout_update_pending) {
radeon_drm_wait_pending_flip(crtc);
radeon_drm_abort_entry(drmmode_crtc->scanout_update_pending);
drmmode_crtc->scanout_update_pending = 0;
radeon_drm_queue_handle_deferred(crtc);
}
drmmode_crtc_scanout_destroy(drmmode_crtc->drmmode,
&drmmode_crtc->scanout[0]);
drmmode_crtc_scanout_destroy(drmmode_crtc->drmmode,
@@ -967,9 +976,7 @@ done:
if (drmmode_crtc->scanout[scanout_id].pixmap &&
fb != radeon_pixmap_get_fb(drmmode_crtc->
scanout[scanout_id].pixmap)) {
radeon_drm_abort_entry(drmmode_crtc->scanout_update_pending);
drmmode_crtc->scanout_update_pending = 0;
drmmode_crtc_scanout_free(drmmode_crtc);
drmmode_crtc_scanout_free(crtc);
} else if (!drmmode_crtc->tear_free) {
drmmode_crtc_scanout_destroy(drmmode,
&drmmode_crtc->scanout[1]);
@@ -1265,7 +1272,7 @@ drmmode_set_scanout_pixmap(xf86CrtcPtr crtc, PixmapPtr ppix)
}
}
drmmode_crtc_scanout_free(drmmode_crtc);
drmmode_crtc_scanout_free(crtc);
drmmode_crtc->prime_scanout_pixmap = NULL;
if (!ppix)
@@ -1280,7 +1287,7 @@ drmmode_set_scanout_pixmap(xf86CrtcPtr crtc, PixmapPtr ppix)
!drmmode_crtc_scanout_create(crtc, &drmmode_crtc->scanout[1],
ppix->drawable.width,
ppix->drawable.height)) {
drmmode_crtc_scanout_free(drmmode_crtc);
drmmode_crtc_scanout_free(crtc);
return FALSE;
}
@@ -2770,6 +2777,9 @@ void drmmode_fini(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
if (info->dri2.pKernelDRMVersion->version_minor < 4 || !info->drmmode_inited)
return;
for (c = 0; c < config->num_crtc; c++)
drmmode_crtc_scanout_free(config->crtc[c]);
if (pRADEONEnt->fd_wakeup_registered == serverGeneration &&
!--pRADEONEnt->fd_wakeup_ref) {
#if HAVE_NOTIFY_FD
@@ -2780,9 +2790,6 @@ void drmmode_fini(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
drm_wakeup_handler, pScrn);
#endif
}
for (c = 0; c < config->num_crtc; c++)
drmmode_crtc_scanout_free(config->crtc[c]->driver_private);
}

2
src/drmmode_display.h
View File

@@ -215,7 +215,7 @@ extern Bool drmmode_setup_colormap(ScreenPtr pScreen, ScrnInfoPtr pScrn);
extern void drmmode_crtc_scanout_destroy(drmmode_ptr drmmode,
struct drmmode_scanout *scanout);
void drmmode_crtc_scanout_free(drmmode_crtc_private_ptr drmmode_crtc);
void drmmode_crtc_scanout_free(xf86CrtcPtr crtc);
PixmapPtr drmmode_crtc_scanout_create(xf86CrtcPtr crtc,
struct drmmode_scanout *scanout,
int width, int height);

2
src/radeon_kms.c
View File

@@ -2614,7 +2614,7 @@ void RADEONLeaveVT_KMS(ScrnInfoPtr pScrn)
pixmap_unref_fb(drmmode_crtc->scanout[1].pixmap,
None, pRADEONEnt);
} else {
drmmode_crtc_scanout_free(drmmode_crtc);
drmmode_crtc_scanout_free(crtc);
}
}
}