On Fri, Mar 19, 2021 at 10:39:30AM +0100, Greg KH wrote: > On Wed, Mar 17, 2021 at 10:55:02AM +0800, Colin Xu wrote: > > commit a5a8ef937cfa79167f4b2a5602092b8d14fd6b9a upstream > > > > Program display related vregs to proper value at initialization, setup > > virtual monitor and hotplug. > > > > vGPU virtual display vregs inherit the value from pregs. The virtual DP > > monitor is always setup on PORT_B for BXT/APL. However the host may > > connect monitor on other PORT or without any monitor connected. Without > > properly setup PIPE/DDI/PLL related vregs, guest driver may not setup > > the virutal display as expected, and the guest desktop may not be > > created. > > Since only one virtual display is supported, enable PIPE_A only. And > > enable transcoder/DDI/PLL based on which port is setup for BXT/APL. > > > > V2: > > Revise commit message. > > > > V3: > > set_edid should on PORT_B for BXT. > > Inject hpd event for BXT. > > > > V4: > > Temporarily disable vfio edid on BXT/APL until issue fixed. > > > > V5: > > Rebase to use new HPD define GEN8_DE_PORT_HOTPLUG for BXT. > > Put vfio edid disabling on BXT/APL to a separate patch. > > > > Acked-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> > > Signed-off-by: Colin Xu <colin.xu@xxxxxxxxx> > > Signed-off-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx> > > Link: http://patchwork.freedesktop.org/patch/msgid/20201109073922.757759-1-colin.xu@xxxxxxxxx > > (cherry picked from commit a5a8ef937cfa79167f4b2a5602092b8d14fd6b9a) > > Signed-off-by: Colin Xu <colin.xu@xxxxxxxxx> > > Cc: <stable@xxxxxxxxxxxxxxx> # 5.4.y > > --- > > drivers/gpu/drm/i915/gvt/display.c | 173 +++++++++++++++++++++++++++++ > > drivers/gpu/drm/i915/gvt/mmio.c | 5 + > > 2 files changed, 178 insertions(+) > > I've taken this backport for 5.10.y as well, because it is missing > there. Oops, nope, it breaks the build. Please also provide a working backport for this as well, we can not have users moving to a newer kernel version and have a regression for a known issue. thanks, greg k-h
