From: Ville Syrjälä Date: Fri, 21 Nov 2014 19:00:36 +0000 (+0200) Subject: drm/i915: Don't clobber crtc->new_config when nothing changes X-Git-Tag: MMI-PSA29.97-13-9~10619^2~43^2~148 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b9950a133f8bcfbe30ad11ae27ed75668fffe5cd;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git drm/i915: Don't clobber crtc->new_config when nothing changes When doing a nop modeset we currently leave crtc->new_config point at the already freed temporary pipe_config. That will anger the sanity checks in intel_modeset_update_state() when the nop modeset gets followed by a GPU reset on gen3/4 where the display block gets fully reinitialized during the reset. So leave crtc->new_config alone until we know a modeset is actually required. Cc: Jesse Barnes Signed-off-by: Ville Syrjälä Reviewed-by: Jesse Barnes Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 853697fc4d4b..3218455a7ade 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -10907,7 +10907,6 @@ intel_modeset_compute_config(struct drm_crtc *crtc, } intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config, "[modeset]"); - to_intel_crtc(crtc)->new_config = pipe_config; out: return pipe_config; @@ -10933,6 +10932,9 @@ static int __intel_set_mode(struct drm_crtc *crtc, *saved_mode = crtc->mode; + if (modeset_pipes) + to_intel_crtc(crtc)->new_config = pipe_config; + /* * See if the config requires any additional preparation, e.g. * to adjust global state with pipes off. We need to do this @@ -11466,12 +11468,12 @@ static int intel_crtc_set_config(struct drm_mode_set *set) ret = PTR_ERR(pipe_config); goto fail; } else if (pipe_config) { - if (to_intel_crtc(set->crtc)->new_config->has_audio != + if (pipe_config->has_audio != to_intel_crtc(set->crtc)->config.has_audio) config->mode_changed = true; /* Force mode sets for any infoframe stuff */ - if (to_intel_crtc(set->crtc)->new_config->has_infoframe || + if (pipe_config->has_infoframe || to_intel_crtc(set->crtc)->config.has_infoframe) config->mode_changed = true; }