On some Intel iGPU + AMD dGPU platform, when connect extern display
from dGPU, X will crash, show the log like:
randr: falling back to unsynchronized pixmap sharing
(EE)
(EE) Backtrace:
(EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4e)
(EE) 1: /usr/lib/xorg/Xorg (0x55cb0151a000+0x1b5ce9)
(EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f1587a1d000+0x11390)
(EE)
(EE) Segmentation fault at address 0x0
(EE)
There is NULL pointer accessing on ent->slave_dst->drawable.pScreen->
SharedPixmapNotifyDamage.
On the platform, since the dGPU is GPU device, so that the iGPU is
output master device. SharedPixmapNotifyDamage() should be called when
current device is output master.
Change-Id: I8fa6922a4f75b5e068970fc4d362f778052379f2
Signed-off-by: Jim Qu <jim...@amd.com>
---
hw/xfree86/drivers/modesetting/driver.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/hw/xfree86/drivers/modesetting/driver.c
b/hw/xfree86/drivers/modesetting/driver.c
index 9362370..37fafb1 100644
--- a/hw/xfree86/drivers/modesetting/driver.c
+++ b/hw/xfree86/drivers/modesetting/driver.c
@@ -640,19 +640,21 @@ ms_dirty_update(ScreenPtr screen, int *timeout)
xorg_list_for_each_entry(ent, &screen->pixmap_dirty_list, ent) {
region = DamageRegion(ent->damage);
if (RegionNotEmpty(region)) {
- msPixmapPrivPtr ppriv =
- msGetPixmapPriv(&ms->drmmode, ent->slave_dst);
+ if (!screen->isGPU) {
+ msPixmapPrivPtr ppriv =
+ msGetPixmapPriv(&ms->drmmode,
ent->slave_dst->master_pixmap);
- if (ppriv->notify_on_damage) {
- ppriv->notify_on_damage = FALSE;
+ if (ppriv->notify_on_damage) {
+ ppriv->notify_on_damage = FALSE;
- ent->slave_dst->drawable.pScreen->
- SharedPixmapNotifyDamage(ent->slave_dst);
- }
+ ent->slave_dst->drawable.pScreen->
+ SharedPixmapNotifyDamage(ent->slave_dst);
+ }
- /* Requested manual updating */
- if (ppriv->defer_dirty_update)
- continue;
+ /* Requested manual updating */
+ if (ppriv->defer_dirty_update)
+ continue;
+ }
redisplay_dirty(screen, ent, timeout);
DamageEmpty(ent->damage);
--
2.7.4
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