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drm/i915: Don't modeset with old mode when set_crtc fails 

The modeset code is now properly divided in two phases, so that it only
changes hardware state if it succeeds, so there's no ill-effect that
needs to be undone on failure anymore.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ander Conselvan de Oliveira 2015-04-21 17:13:08 +03:00 committed by Daniel Vetter
parent 9eb45f228f
commit 561c8bda8f
1 changed files with 0 additions and 48 deletions
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48
drivers/gpu/drm/i915/intel_display.c
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@ -12787,33 +12787,9 @@ intel_modeset_stage_output_state(struct drm_device *dev,
return 0;
}
static void disable_crtc_nofb(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
struct intel_encoder *encoder;
struct intel_connector *connector;
DRM_DEBUG_KMS("Trying to restore without FB -> disabling pipe %c\n",
pipe_name(crtc->pipe));
for_each_intel_connector(dev, connector) {
if (connector->new_encoder &&
connector->new_encoder->new_crtc == crtc)
connector->new_encoder = NULL;
}
for_each_intel_encoder(dev, encoder) {
if (encoder->new_crtc == crtc)
encoder->new_crtc = NULL;
}
crtc->new_enabled = false;
}
static int intel_crtc_set_config(struct drm_mode_set *set)
{
struct drm_device *dev;
struct drm_mode_set save_set;
struct drm_atomic_state *state = NULL;
struct intel_set_config *config;
struct intel_crtc_state *pipe_config;
@ -12846,12 +12822,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
if (ret)
goto out_config;
save_set.crtc = set->crtc;
save_set.mode = &set->crtc->mode;
save_set.x = set->crtc->x;
save_set.y = set->crtc->y;
save_set.fb = set->crtc->primary->fb;
state = drm_atomic_state_alloc(dev);
if (!state) {
ret = -ENOMEM;
@ -12935,24 +12905,6 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
set->crtc->base.id, ret);
fail:
intel_set_config_restore_state(dev, config);
drm_atomic_state_clear(state);
/*
* HACK: if the pipe was on, but we didn't have a framebuffer,
* force the pipe off to avoid oopsing in the modeset code
* due to fb==NULL. This should only happen during boot since
* we don't yet reconstruct the FB from the hardware state.
*/
if (to_intel_crtc(save_set.crtc)->new_enabled && !save_set.fb)
disable_crtc_nofb(to_intel_crtc(save_set.crtc));
/* Try to restore the config */
if (config->mode_changed &&
intel_set_mode(save_set.crtc, save_set.mode,
save_set.x, save_set.y, save_set.fb,
state))
DRM_ERROR("failed to restore config after modeset failure\n");
}
out_config: