On Tue, Nov 22, 2016 at 3:35 AM, Michel Dänzer <michel at daenzer.net> wrote: > From: Michel Dänzer <michel.daenzer at amd.com> > > Fixes the vblank interrupt being disabled when it should be on, which > can cause at least the following symptoms: > > * Hangs when running 'xset dpms force off' in a GNOME session with > gnome-shell using DRI2. > * RandR 1.4 slave outputs freezing with garbage displayed using > xf86-video-ati 7.8.0 or newer. > > NOTE: This patch only applies to 4.5.y or older kernels. With newer > kernels, this problem cannot happen because the driver now uses > drm_crtc_vblank_on/off instead of drm_vblank_pre/post_modeset. I > consider this patch safer for older kernels than backporting the API > change, because drm_crtc_vblank_on/off had various issues in older > kernels, and I'm not sure all fixes for those have been backported to > all stable branches where this patch could be applied. > > Reported-and-Tested-by: Max Staudt <mstaudt at suse.de> > Signed-off-by: Michel Dänzer <michel.daenzer at amd.com> Reviewed-by: Alex Deucher <alexander.deucher at amd.com> > --- > drivers/gpu/drm/radeon/atombios_crtc.c | 2 ++ > drivers/gpu/drm/radeon/radeon_legacy_crtc.c | 2 ++ > 2 files changed, 4 insertions(+) > > diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c > index dac78ad..115b4a4 100644 > --- a/drivers/gpu/drm/radeon/atombios_crtc.c > +++ b/drivers/gpu/drm/radeon/atombios_crtc.c > @@ -275,6 +275,8 @@ void atombios_crtc_dpms(struct drm_crtc *crtc, int mode) > atombios_enable_crtc_memreq(crtc, ATOM_ENABLE); > atombios_blank_crtc(crtc, ATOM_DISABLE); > drm_vblank_post_modeset(dev, radeon_crtc->crtc_id); > + /* Make sure vblank interrupt is still enabled if needed */ > + radeon_irq_set(rdev); > radeon_crtc_load_lut(crtc); > break; > case DRM_MODE_DPMS_STANDBY: > diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c > index 678b438..89f22bd 100644 > --- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c > +++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c > @@ -331,6 +331,8 @@ static void radeon_crtc_dpms(struct drm_crtc *crtc, int mode) > WREG32_P(RADEON_CRTC_EXT_CNTL, crtc_ext_cntl, ~(mask | crtc_ext_cntl)); > } > drm_vblank_post_modeset(dev, radeon_crtc->crtc_id); > + /* Make sure vblank interrupt is still enabled if needed */ > + radeon_irq_set(rdev); > radeon_crtc_load_lut(crtc); > break; > case DRM_MODE_DPMS_STANDBY: > -- > 2.10.2 > > _______________________________________________ > dri-devel mailing list > dri-devel at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
