[PATCH v3.6 16/22] drm/i915: Implement intel_crtc_control using atomic state, v4.

Maarten Lankhorst
2015-05-26T08:35:24Z

Assume the callers lock everything with drm_modeset_lock_all.

This change had to be done after converting suspend/resume to
use atomic_state so the atomic state is preserved, otherwise
all transitional state is erased.

Now all callers of .crtc_enable and .crtc_disable go through
atomic modeset! :-D

Changes since v1:
- Only check for crtc_state->active in valleyview_modeset_global_pipes.
- Only check for crtc_state->active in modeset_update_crtc_power_domains.
Changes since v2:
- Rework on top of the changed patch order.
Changes since v3:
- Rename intel_crtc_toggle in description to *_control
- Change return value to int.
- Do not add plane state, should be done implicitly already.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 53 ++++++++++++++++++++++--------------
drivers/gpu/drm/i915/intel_drv.h | 2 +-
2 files changed, 33 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e9680eb85bd0..32bab28432f7 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5973,38 +5973,49 @@ void intel_display_suspend(struct drm_device *dev)
}

/* Master function to enable/disable CRTC and corresponding power wells */
-void intel_crtc_control(struct drm_crtc *crtc, bool enable)
+int intel_crtc_control(struct drm_crtc *crtc, bool enable)
{
struct drm_device *dev = crtc->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_mode_config *config = &dev->mode_config;
+ struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- enum intel_display_power_domain domain;
- unsigned long domains;
+ struct intel_crtc_state *pipe_config;
+ struct drm_atomic_state *state;
+ int ret;

if (enable == intel_crtc->active)
- return;
+ return 0;

if (enable && !crtc->state->enable)
- return;
+ return 0;

- crtc->state->active = enable;
- if (enable) {
- domains = get_crtc_power_domains(crtc);
- for_each_power_domain(domain, domains)
- intel_display_power_get(dev_priv, domain);
- intel_crtc->enabled_power_domains = domains;
+ /* this function should be called with drm_modeset_lock_all for now */
+ if (WARN_ON(!ctx))
+ return -EIO;
+ lockdep_assert_held(&ctx->ww_ctx);

- dev_priv->display.crtc_enable(crtc);
- intel_crtc_enable_planes(crtc);
- } else {
- intel_crtc_disable_planes(crtc);
- dev_priv->display.crtc_disable(crtc);
+ state = drm_atomic_state_alloc(dev);
+ if (WARN_ON(!state))
+ return -ENOMEM;

- domains = intel_crtc->enabled_power_domains;
- for_each_power_domain(domain, domains)
- intel_display_power_put(dev_priv, domain);
- intel_crtc->enabled_power_domains = 0;
+ state->acquire_ctx = ctx;
+ state->allow_modeset = true;
+
+ pipe_config = intel_atomic_get_crtc_state(state, intel_crtc);
+ if (IS_ERR(pipe_config)) {
+ ret = PTR_ERR(pipe_config);
+ goto err;
}
+ pipe_config->base.active = enable;
+
+ ret = intel_set_mode(state);
+ if (!ret)
+ return ret;
+
+err:
+ DRM_ERROR("Updating crtc active failed with %i\n", ret);
+ drm_atomic_state_free(state);
+ return ret;
}

/**
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 60a29ff65f1f..c113f187090f 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -989,7 +989,7 @@ void intel_mark_busy(struct drm_device *dev);
void intel_mark_idle(struct drm_device *dev);
void intel_crtc_restore_mode(struct drm_crtc *crtc);
void intel_display_suspend(struct drm_device *dev);
-void intel_crtc_control(struct drm_crtc *crtc, bool enable);
+int intel_crtc_control(struct drm_crtc *crtc, bool enable);
void intel_crtc_update_dpms(struct drm_crtc *crtc);
void intel_encoder_destroy(struct drm_encoder *encoder);
int intel_connector_init(struct intel_connector *);