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drm/i915: disable all crtcs at suspend time

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We need this to avoid confusing the hw state readout code with the cpt
pch plls at resume time: We'd read the new pipe state (which is
disabled), but still believe that we have a life pll connected to that
pipe (from before the suspend). Hence properly disable pipes to clear
out all the residual state.

This has the neat side-effect that we don't enable ports prematurely
by restoring bogus state from the saved register values.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-07-26 19:21:47 +02:00
parent ea9d758d6d
commit a261b246eb
3 changed files with 14 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_drv.c
View File

@ -470,6 +470,9 @@ static int i915_drm_freeze(struct drm_device *dev)
"GEM idle failed, resume might fail\n");
return error;
}
intel_modeset_disable(dev);
drm_irq_uninstall(dev);
}

10
drivers/gpu/drm/i915/intel_display.c
View File

@ -3545,6 +3545,16 @@ static void intel_crtc_disable(struct drm_crtc *crtc)
}
}
void intel_modeset_disable(struct drm_device *dev)
{
struct drm_crtc *crtc;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
if (crtc->enabled)
intel_crtc_disable(crtc);
}
}
void intel_encoder_noop(struct drm_encoder *encoder)
{
}

1
drivers/gpu/drm/i915/intel_drv.h
View File

@ -446,6 +446,7 @@ struct intel_set_config {
extern bool intel_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mode,
int x, int y, struct drm_framebuffer *old_fb);
extern void intel_modeset_disable(struct drm_device *dev);
extern void intel_crtc_load_lut(struct drm_crtc *crtc);
extern void intel_crtc_update_dpms(struct drm_crtc *crtc);
extern void intel_encoder_noop(struct drm_encoder *encoder);