Re: [BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-07 Thread Maxime Ripard
On Mon, May 06, 2024 at 07:50:57PM GMT, Laurent Pinchart wrote: > On Mon, May 06, 2024 at 10:57:17AM -0400, Sean Anderson wrote: > > On 5/6/24 03:35, Laurent Pinchart wrote: > > > On Mon, May 06, 2024 at 09:29:36AM +0200, Maxime Ripard wrote: > > >> Hi Laurent, Sean, > > >> > > >> On Sat, May 04,

Re: [BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-06 Thread Laurent Pinchart
On Mon, May 06, 2024 at 10:57:17AM -0400, Sean Anderson wrote: > On 5/6/24 03:35, Laurent Pinchart wrote: > > On Mon, May 06, 2024 at 09:29:36AM +0200, Maxime Ripard wrote: > >> Hi Laurent, Sean, > >> > >> On Sat, May 04, 2024 at 03:21:18PM GMT, Laurent Pinchart wrote: > >> > On Fri, May 03, 2024

Re: [BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-06 Thread Sean Anderson
On 5/6/24 03:35, Laurent Pinchart wrote: > On Mon, May 06, 2024 at 09:29:36AM +0200, Maxime Ripard wrote: >> Hi Laurent, Sean, >> >> On Sat, May 04, 2024 at 03:21:18PM GMT, Laurent Pinchart wrote: >> > On Fri, May 03, 2024 at 05:54:32PM -0400, Sean Anderson wrote: >> > > I have discovered a bug

Re: [BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-06 Thread Sean Anderson
On 5/6/24 07:16, Tomi Valkeinen wrote: > Hi, > > On 04/05/2024 00:54, Sean Anderson wrote: >> Hi, >> >> I have discovered a bug in the displayport driver on drm-misc-next. To >> trigger it, run >> >> echo fd4a.display > /sys/bus/platform/drivers/zynqmp-dpsub/unbind >> >> The system will

Re: [BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-06 Thread Tomi Valkeinen
Hi, On 04/05/2024 00:54, Sean Anderson wrote: Hi, I have discovered a bug in the displayport driver on drm-misc-next. To trigger it, run echo fd4a.display > /sys/bus/platform/drivers/zynqmp-dpsub/unbind The system will become unresponsive and (after a bit) splat with a hard LOCKUP. One

Re: [BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-06 Thread Laurent Pinchart
On Mon, May 06, 2024 at 09:29:36AM +0200, Maxime Ripard wrote: > Hi Laurent, Sean, > > On Sat, May 04, 2024 at 03:21:18PM GMT, Laurent Pinchart wrote: > > On Fri, May 03, 2024 at 05:54:32PM -0400, Sean Anderson wrote: > > > I have discovered a bug in the displayport driver on drm-misc-next. To >

Re: [BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-06 Thread Maxime Ripard
Hi Laurent, Sean, On Sat, May 04, 2024 at 03:21:18PM GMT, Laurent Pinchart wrote: > On Fri, May 03, 2024 at 05:54:32PM -0400, Sean Anderson wrote: > > I have discovered a bug in the displayport driver on drm-misc-next. To > > trigger it, run > > > > echo fd4a.display >

Re: [BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-04 Thread Laurent Pinchart
Hi Sean, On Fri, May 03, 2024 at 05:54:32PM -0400, Sean Anderson wrote: > Hi, > > I have discovered a bug in the displayport driver on drm-misc-next. To > trigger it, run > > echo fd4a.display > /sys/bus/platform/drivers/zynqmp-dpsub/unbind > > The system will become unresponsive and

[BUG] drm: zynqmp_dp: Lockup in zynqmp_dp_bridge_detect when device is unbound

2024-05-03 Thread Sean Anderson
Hi, I have discovered a bug in the displayport driver on drm-misc-next. To trigger it, run echo fd4a.display > /sys/bus/platform/drivers/zynqmp-dpsub/unbind The system will become unresponsive and (after a bit) splat with a hard LOCKUP. One core will be unresponsive at the first