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| author | Marcin Slusarz <marcin.slusarz@gmail.com> | 2012-12-18 20:30:47 +0100 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2013-01-13 18:07:45 +1000 |
| commit | 92441b2263866c27ef48137be5aa6c8c692652fc (patch) | |
| tree | d018c605f3ab5ae42f2d2180cdab889f9b2d8d6f | |
| parent | dd5700ea98ad0b375a72525ce7d7edddf15b2693 (diff) | |
| download | lwn-92441b2263866c27ef48137be5aa6c8c692652fc.tar.gz lwn-92441b2263866c27ef48137be5aa6c8c692652fc.zip | |
drm/nouveau: fix blank LVDS screen regression on pre-nv50 cards
Commit 2a44e499 ("drm/nouveau/disp: introduce proper init/fini, separate
from create/destroy") started to call display init routines on pre-nv50
hardware on module load. But LVDS init code sets driver state in a way
which prevents modesetting code from operating properly.
nv04_display_init calls nv04_dfp_restore, which sets encoder->last_dpms to
NV_DPMS_CLEARED.
drm_crtc_helper_set_mode
nv04_dfp_prepare
nv04_lvds_dpms(DRM_MODE_DPMS_OFF)
nv04_lvds_dpms checks last_dpms mode (which is NV_DPMS_CLEARED) and wrongly
assumes it's a "powersaving mode", the new one (DRM_MODE_DPMS_OFF) is too,
so it skips calling some crucial lvds scripts.
Reported-by: Chris Paulson-Ellis <chris@edesix.com>
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv04_dfp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nv04_dfp.c b/drivers/gpu/drm/nouveau/nv04_dfp.c index 184cdf806761..39ffc07f906b 100644 --- a/drivers/gpu/drm/nouveau/nv04_dfp.c +++ b/drivers/gpu/drm/nouveau/nv04_dfp.c @@ -505,7 +505,7 @@ static void nv04_dfp_update_backlight(struct drm_encoder *encoder, int mode) static inline bool is_powersaving_dpms(int mode) { - return (mode != DRM_MODE_DPMS_ON); + return mode != DRM_MODE_DPMS_ON && mode != NV_DPMS_CLEARED; } static void nv04_lvds_dpms(struct drm_encoder *encoder, int mode) |