[PATCH v3.5 16.5/22] drm/i915: Make intel_display_suspend atomic.

Maarten Lankhorst
2015-05-21T12:40:50Z

Calculate all state using a normal transition, but afterwards fudge
crtc->state->active back to its old value. This should still allow
state restore in setup_hw_state to work properly.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 47 +++++++++++++++++++++++++++++++++---
1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8b1d91136d25..2dc59147d890 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5951,16 +5951,55 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc)
*/
void intel_display_suspend(struct drm_device *dev)
{
- struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_mode_config *config = &dev->mode_config;
+ struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;
+ struct drm_atomic_state *state;
struct drm_crtc *crtc;
+ unsigned crtc_mask = 0;
+ int ret = 0;
+
+ if (WARN_ON(!ctx))
+ return;
+
+ lockdep_assert_held(&ctx->ww_ctx);
+ state = drm_atomic_state_alloc(dev);
+ if (WARN_ON(!state))
+ return;
+
+ state->acquire_ctx = ctx;
+ state->allow_modeset = true;

for_each_crtc(dev, crtc) {
- if (!to_intel_crtc(crtc)->active)
+ struct drm_crtc_state *crtc_state =
+ drm_atomic_get_crtc_state(state, crtc);
+
+ ret = PTR_ERR_OR_ZERO(crtc_state);
+ if (ret)
+ goto free;
+
+ if (!crtc_state->active)
continue;

- intel_crtc_disable_planes(crtc);
- dev_priv->display.crtc_disable(crtc);
+ crtc_state->active = false;
+ crtc_mask |= 1 << drm_crtc_index(crtc);
}
+
+ if (crtc_mask) {
+ ret = intel_set_mode(state);
+
+ if (!ret) {
+ for_each_crtc(dev, crtc)
+ if (crtc_mask & (1 << drm_crtc_index(crtc)))
+ crtc->state->active = true;
+
+ return;
+ }
+ }
+
+free:
+ if (ret)
+ DRM_ERROR("Suspending crtc's failed with %i\n", ret);
+ drm_atomic_state_free(state);
}

/* Master function to enable/disable CRTC and corresponding power wells */