diff options
| author | Michel Dänzer <michel@daenzer.net> | 2016-11-29 18:40:20 +0900 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:58:24 +0200 |
| commit | 3556be99904ef8bcbe663e5cac609558b0f30670 (patch) | |
| tree | a7bae7bd44c030ba1bf0d3a7870a3955a0e9ce49 /drivers/gpu | |
| parent | a02213e354ec8eb0ee48833f58976827c279e057 (diff) | |
drm/radeon: Ensure vblank interrupt is enabled on DPMS transition to on
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[0]. 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.
---------------------
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.
[0] See upstream commit:
commit 777e3cbc791f131806d9bf24b3325637c7fc228d
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu Jan 21 11:08:57 2016 +0100
drm/radeon: Switch to drm_vblank_on/off
Reported-and-Tested-by: Max Staudt <mstaudt@suse.de>
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_crtc.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_legacy_crtc.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 8ac333094..4d0958274 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -257,6 +257,8 @@ 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 bc73021d3..ae0d7b1cb 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: |