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1d5a95b5c9
So far we've sort of protected the global state under dev_priv with the connection_mutex. I wan to change that so that we can change the cdclk even for pure plane updates. To that end let's formalize the protection of the global state to follow what I started with the cdclk code already (though not entirely properly) such that any crtc mutex will suffice as a read lock, and all crtcs mutexes act as the write lock. We'll also pimp intel_atomic_state_clear() to clear the entire global state, so that we don't accidentally leak stale information between the locking retries. As a slight optimization we'll only lock the crtc mutexes to protect the global state, however if and when we actually have to poke the hw (eg. if the actual cdclk changes) we must serialize commits across all crtcs so that a parallel nonblocking commit can't get ahead of the cdclk reprogamming. We do that by adding all crtcs to the state. TODO: the old global state examined during commit may still be a problem since it always looks at the _latest_ swapped state in dev_priv. Need to add proper old/new state for that too I think. v2: Remeber to serialize the commits if necessary Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191015193035.25982-3-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef __INTEL_ATOMIC_H__
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#define __INTEL_ATOMIC_H__
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#include <linux/types.h>
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struct drm_atomic_state;
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struct drm_connector;
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struct drm_connector_state;
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struct drm_crtc;
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struct drm_crtc_state;
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struct drm_device;
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struct drm_i915_private;
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struct drm_property;
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struct intel_atomic_state;
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struct intel_crtc;
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struct intel_crtc_state;
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int intel_digital_connector_atomic_get_property(struct drm_connector *connector,
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const struct drm_connector_state *state,
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struct drm_property *property,
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u64 *val);
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int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
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struct drm_connector_state *state,
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struct drm_property *property,
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u64 val);
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int intel_digital_connector_atomic_check(struct drm_connector *conn,
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struct drm_atomic_state *state);
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struct drm_connector_state *
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intel_digital_connector_duplicate_state(struct drm_connector *connector);
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struct drm_crtc_state *intel_crtc_duplicate_state(struct drm_crtc *crtc);
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void intel_crtc_destroy_state(struct drm_crtc *crtc,
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struct drm_crtc_state *state);
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struct drm_atomic_state *intel_atomic_state_alloc(struct drm_device *dev);
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void intel_atomic_state_clear(struct drm_atomic_state *state);
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struct intel_crtc_state *
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intel_atomic_get_crtc_state(struct drm_atomic_state *state,
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struct intel_crtc *crtc);
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int intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
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struct intel_crtc *intel_crtc,
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struct intel_crtc_state *crtc_state);
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int intel_atomic_lock_global_state(struct intel_atomic_state *state);
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int intel_atomic_serialize_global_state(struct intel_atomic_state *state);
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#endif /* __INTEL_ATOMIC_H__ */
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