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1328 lines
44 KiB
1328 lines
44 KiB
/* |
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* Copyright © 2006 Keith Packard |
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* Copyright © 2007-2008 Dave Airlie |
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* Copyright © 2007-2008 Intel Corporation |
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* Jesse Barnes <[email protected]> |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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* OTHER DEALINGS IN THE SOFTWARE. |
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*/ |
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#ifndef __DRM_CRTC_H__ |
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#define __DRM_CRTC_H__ |
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|
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#include <linux/i2c.h> |
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#include <linux/spinlock.h> |
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#include <linux/types.h> |
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#include <linux/fb.h> |
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#include <linux/hdmi.h> |
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#include <linux/media-bus-format.h> |
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#include <uapi/drm/drm_mode.h> |
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#include <uapi/drm/drm_fourcc.h> |
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#include <drm/drm_modeset_lock.h> |
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#include <drm/drm_rect.h> |
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#include <drm/drm_mode_object.h> |
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#include <drm/drm_framebuffer.h> |
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#include <drm/drm_modes.h> |
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#include <drm/drm_connector.h> |
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#include <drm/drm_device.h> |
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#include <drm/drm_property.h> |
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#include <drm/drm_edid.h> |
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#include <drm/drm_plane.h> |
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#include <drm/drm_blend.h> |
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#include <drm/drm_color_mgmt.h> |
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#include <drm/drm_debugfs_crc.h> |
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#include <drm/drm_mode_config.h> |
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|
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struct drm_device; |
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struct drm_mode_set; |
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struct drm_file; |
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struct drm_clip_rect; |
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struct drm_printer; |
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struct drm_self_refresh_data; |
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struct device_node; |
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struct dma_fence; |
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struct edid; |
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|
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static inline int64_t U642I64(uint64_t val) |
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{ |
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return (int64_t)*((int64_t *)&val); |
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} |
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static inline uint64_t I642U64(int64_t val) |
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{ |
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return (uint64_t)*((uint64_t *)&val); |
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} |
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|
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struct drm_crtc; |
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struct drm_pending_vblank_event; |
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struct drm_plane; |
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struct drm_bridge; |
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struct drm_atomic_state; |
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|
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struct drm_crtc_helper_funcs; |
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struct drm_plane_helper_funcs; |
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|
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/** |
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* struct drm_crtc_state - mutable CRTC state |
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* |
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* Note that the distinction between @enable and @active is rather subtle: |
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* Flipping @active while @enable is set without changing anything else may |
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* never return in a failure from the &drm_mode_config_funcs.atomic_check |
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* callback. Userspace assumes that a DPMS On will always succeed. In other |
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* words: @enable controls resource assignment, @active controls the actual |
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* hardware state. |
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* |
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* The three booleans active_changed, connectors_changed and mode_changed are |
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* intended to indicate whether a full modeset is needed, rather than strictly |
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* describing what has changed in a commit. See also: |
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* drm_atomic_crtc_needs_modeset() |
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* |
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* WARNING: Transitional helpers (like drm_helper_crtc_mode_set() or |
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* drm_helper_crtc_mode_set_base()) do not maintain many of the derived control |
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* state like @plane_mask so drivers not converted over to atomic helpers should |
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* not rely on these being accurate! |
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*/ |
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struct drm_crtc_state { |
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/** @crtc: backpointer to the CRTC */ |
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struct drm_crtc *crtc; |
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|
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/** |
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* @enable: Whether the CRTC should be enabled, gates all other state. |
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* This controls reservations of shared resources. Actual hardware state |
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* is controlled by @active. |
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*/ |
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bool enable; |
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|
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/** |
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* @active: Whether the CRTC is actively displaying (used for DPMS). |
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* Implies that @enable is set. The driver must not release any shared |
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* resources if @active is set to false but @enable still true, because |
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* userspace expects that a DPMS ON always succeeds. |
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* |
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* Hence drivers must not consult @active in their various |
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* &drm_mode_config_funcs.atomic_check callback to reject an atomic |
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* commit. They can consult it to aid in the computation of derived |
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* hardware state, since even in the DPMS OFF state the display hardware |
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* should be as much powered down as when the CRTC is completely |
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* disabled through setting @enable to false. |
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*/ |
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bool active; |
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|
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/** |
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* @planes_changed: Planes on this crtc are updated. Used by the atomic |
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* helpers and drivers to steer the atomic commit control flow. |
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*/ |
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bool planes_changed : 1; |
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|
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/** |
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* @mode_changed: @mode or @enable has been changed. Used by the atomic |
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* helpers and drivers to steer the atomic commit control flow. See also |
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* drm_atomic_crtc_needs_modeset(). |
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* |
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* Drivers are supposed to set this for any CRTC state changes that |
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* require a full modeset. They can also reset it to false if e.g. a |
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* @mode change can be done without a full modeset by only changing |
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* scaler settings. |
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*/ |
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bool mode_changed : 1; |
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|
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/** |
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* @active_changed: @active has been toggled. Used by the atomic |
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* helpers and drivers to steer the atomic commit control flow. See also |
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* drm_atomic_crtc_needs_modeset(). |
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*/ |
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bool active_changed : 1; |
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|
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/** |
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* @connectors_changed: Connectors to this crtc have been updated, |
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* either in their state or routing. Used by the atomic |
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* helpers and drivers to steer the atomic commit control flow. See also |
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* drm_atomic_crtc_needs_modeset(). |
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* |
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* Drivers are supposed to set this as-needed from their own atomic |
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* check code, e.g. from &drm_encoder_helper_funcs.atomic_check |
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*/ |
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bool connectors_changed : 1; |
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/** |
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* @zpos_changed: zpos values of planes on this crtc have been updated. |
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* Used by the atomic helpers and drivers to steer the atomic commit |
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* control flow. |
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*/ |
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bool zpos_changed : 1; |
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/** |
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* @color_mgmt_changed: Color management properties have changed |
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* (@gamma_lut, @degamma_lut or @ctm). Used by the atomic helpers and |
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* drivers to steer the atomic commit control flow. |
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*/ |
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bool color_mgmt_changed : 1; |
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|
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/** |
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* @no_vblank: |
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* |
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* Reflects the ability of a CRTC to send VBLANK events. This state |
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* usually depends on the pipeline configuration. If set to true, DRM |
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* atomic helpers will send out a fake VBLANK event during display |
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* updates after all hardware changes have been committed. This is |
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* implemented in drm_atomic_helper_fake_vblank(). |
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* |
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* One usage is for drivers and/or hardware without support for VBLANK |
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* interrupts. Such drivers typically do not initialize vblanking |
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* (i.e., call drm_vblank_init() with the number of CRTCs). For CRTCs |
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* without initialized vblanking, this field is set to true in |
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* drm_atomic_helper_check_modeset(), and a fake VBLANK event will be |
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* send out on each update of the display pipeline by |
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* drm_atomic_helper_fake_vblank(). |
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* |
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* Another usage is CRTCs feeding a writeback connector operating in |
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* oneshot mode. In this case the fake VBLANK event is only generated |
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* when a job is queued to the writeback connector, and we want the |
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* core to fake VBLANK events when this part of the pipeline hasn't |
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* changed but others had or when the CRTC and connectors are being |
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* disabled. |
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* |
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* __drm_atomic_helper_crtc_duplicate_state() will not reset the value |
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* from the current state, the CRTC driver is then responsible for |
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* updating this field when needed. |
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* |
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* Note that the combination of &drm_crtc_state.event == NULL and |
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* &drm_crtc_state.no_blank == true is valid and usually used when the |
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* writeback connector attached to the CRTC has a new job queued. In |
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* this case the driver will send the VBLANK event on its own when the |
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* writeback job is complete. |
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*/ |
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bool no_vblank : 1; |
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|
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/** |
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* @plane_mask: Bitmask of drm_plane_mask(plane) of planes attached to |
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* this CRTC. |
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*/ |
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u32 plane_mask; |
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|
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/** |
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* @connector_mask: Bitmask of drm_connector_mask(connector) of |
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* connectors attached to this CRTC. |
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*/ |
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u32 connector_mask; |
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|
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/** |
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* @encoder_mask: Bitmask of drm_encoder_mask(encoder) of encoders |
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* attached to this CRTC. |
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*/ |
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u32 encoder_mask; |
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|
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/** |
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* @adjusted_mode: |
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* |
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* Internal display timings which can be used by the driver to handle |
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* differences between the mode requested by userspace in @mode and what |
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* is actually programmed into the hardware. |
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* |
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* For drivers using &drm_bridge, this stores hardware display timings |
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* used between the CRTC and the first bridge. For other drivers, the |
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* meaning of the adjusted_mode field is purely driver implementation |
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* defined information, and will usually be used to store the hardware |
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* display timings used between the CRTC and encoder blocks. |
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*/ |
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struct drm_display_mode adjusted_mode; |
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|
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/** |
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* @mode: |
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* |
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* Display timings requested by userspace. The driver should try to |
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* match the refresh rate as close as possible (but note that it's |
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* undefined what exactly is close enough, e.g. some of the HDMI modes |
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* only differ in less than 1% of the refresh rate). The active width |
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* and height as observed by userspace for positioning planes must match |
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* exactly. |
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* |
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* For external connectors where the sink isn't fixed (like with a |
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* built-in panel), this mode here should match the physical mode on the |
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* wire to the last details (i.e. including sync polarities and |
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* everything). |
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*/ |
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struct drm_display_mode mode; |
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|
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/** |
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* @mode_blob: &drm_property_blob for @mode, for exposing the mode to |
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* atomic userspace. |
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*/ |
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struct drm_property_blob *mode_blob; |
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|
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/** |
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* @degamma_lut: |
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* |
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* Lookup table for converting framebuffer pixel data before apply the |
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* color conversion matrix @ctm. See drm_crtc_enable_color_mgmt(). The |
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* blob (if not NULL) is an array of &struct drm_color_lut. |
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*/ |
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struct drm_property_blob *degamma_lut; |
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|
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/** |
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* @ctm: |
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* |
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* Color transformation matrix. See drm_crtc_enable_color_mgmt(). The |
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* blob (if not NULL) is a &struct drm_color_ctm. |
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*/ |
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struct drm_property_blob *ctm; |
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|
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/** |
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* @gamma_lut: |
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* |
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* Lookup table for converting pixel data after the color conversion |
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* matrix @ctm. See drm_crtc_enable_color_mgmt(). The blob (if not |
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* NULL) is an array of &struct drm_color_lut. |
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*/ |
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struct drm_property_blob *gamma_lut; |
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|
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/** |
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* @target_vblank: |
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* |
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* Target vertical blank period when a page flip |
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* should take effect. |
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*/ |
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u32 target_vblank; |
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|
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/** |
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* @async_flip: |
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* |
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* This is set when DRM_MODE_PAGE_FLIP_ASYNC is set in the legacy |
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* PAGE_FLIP IOCTL. It's not wired up for the atomic IOCTL itself yet. |
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*/ |
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bool async_flip; |
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|
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/** |
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* @vrr_enabled: |
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* |
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* Indicates if variable refresh rate should be enabled for the CRTC. |
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* Support for the requested vrr state will depend on driver and |
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* hardware capabiltiy - lacking support is not treated as failure. |
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*/ |
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bool vrr_enabled; |
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|
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/** |
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* @self_refresh_active: |
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* |
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* Used by the self refresh helpers to denote when a self refresh |
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* transition is occurring. This will be set on enable/disable callbacks |
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* when self refresh is being enabled or disabled. In some cases, it may |
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* not be desirable to fully shut off the crtc during self refresh. |
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* CRTC's can inspect this flag and determine the best course of action. |
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*/ |
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bool self_refresh_active; |
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|
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/** |
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* @scaling_filter: |
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* |
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* Scaling filter to be applied |
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*/ |
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enum drm_scaling_filter scaling_filter; |
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|
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/** |
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* @event: |
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* |
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* Optional pointer to a DRM event to signal upon completion of the |
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* state update. The driver must send out the event when the atomic |
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* commit operation completes. There are two cases: |
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* |
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* - The event is for a CRTC which is being disabled through this |
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* atomic commit. In that case the event can be send out any time |
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* after the hardware has stopped scanning out the current |
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* framebuffers. It should contain the timestamp and counter for the |
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* last vblank before the display pipeline was shut off. The simplest |
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* way to achieve that is calling drm_crtc_send_vblank_event() |
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* somewhen after drm_crtc_vblank_off() has been called. |
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* |
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* - For a CRTC which is enabled at the end of the commit (even when it |
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* undergoes an full modeset) the vblank timestamp and counter must |
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* be for the vblank right before the first frame that scans out the |
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* new set of buffers. Again the event can only be sent out after the |
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* hardware has stopped scanning out the old buffers. |
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* |
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* - Events for disabled CRTCs are not allowed, and drivers can ignore |
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* that case. |
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* |
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* For very simple hardware without VBLANK interrupt, enabling |
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* &struct drm_crtc_state.no_vblank makes DRM's atomic commit helpers |
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* send a fake VBLANK event at the end of the display update after all |
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* hardware changes have been applied. See |
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* drm_atomic_helper_fake_vblank(). |
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* |
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* For more complex hardware this |
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* can be handled by the drm_crtc_send_vblank_event() function, |
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* which the driver should call on the provided event upon completion of |
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* the atomic commit. Note that if the driver supports vblank signalling |
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* and timestamping the vblank counters and timestamps must agree with |
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* the ones returned from page flip events. With the current vblank |
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* helper infrastructure this can be achieved by holding a vblank |
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* reference while the page flip is pending, acquired through |
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* drm_crtc_vblank_get() and released with drm_crtc_vblank_put(). |
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* Drivers are free to implement their own vblank counter and timestamp |
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* tracking though, e.g. if they have accurate timestamp registers in |
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* hardware. |
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* |
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* For hardware which supports some means to synchronize vblank |
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* interrupt delivery with committing display state there's also |
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* drm_crtc_arm_vblank_event(). See the documentation of that function |
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* for a detailed discussion of the constraints it needs to be used |
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* safely. |
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* |
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* If the device can't notify of flip completion in a race-free way |
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* at all, then the event should be armed just after the page flip is |
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* committed. In the worst case the driver will send the event to |
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* userspace one frame too late. This doesn't allow for a real atomic |
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* update, but it should avoid tearing. |
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*/ |
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struct drm_pending_vblank_event *event; |
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|
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/** |
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* @commit: |
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* |
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* This tracks how the commit for this update proceeds through the |
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* various phases. This is never cleared, except when we destroy the |
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* state, so that subsequent commits can synchronize with previous ones. |
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*/ |
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struct drm_crtc_commit *commit; |
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|
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/** @state: backpointer to global drm_atomic_state */ |
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struct drm_atomic_state *state; |
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}; |
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|
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/** |
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* struct drm_crtc_funcs - control CRTCs for a given device |
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* |
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* The drm_crtc_funcs structure is the central CRTC management structure |
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* in the DRM. Each CRTC controls one or more connectors (note that the name |
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* CRTC is simply historical, a CRTC may control LVDS, VGA, DVI, TV out, etc. |
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* connectors, not just CRTs). |
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* |
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* Each driver is responsible for filling out this structure at startup time, |
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* in addition to providing other modesetting features, like i2c and DDC |
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* bus accessors. |
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*/ |
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struct drm_crtc_funcs { |
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/** |
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* @reset: |
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* |
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* Reset CRTC hardware and software state to off. This function isn't |
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* called by the core directly, only through drm_mode_config_reset(). |
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* It's not a helper hook only for historical reasons. |
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* |
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* Atomic drivers can use drm_atomic_helper_crtc_reset() to reset |
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* atomic state using this hook. |
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*/ |
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void (*reset)(struct drm_crtc *crtc); |
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|
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/** |
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* @cursor_set: |
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* |
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* Update the cursor image. The cursor position is relative to the CRTC |
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* and can be partially or fully outside of the visible area. |
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* |
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* Note that contrary to all other KMS functions the legacy cursor entry |
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* points don't take a framebuffer object, but instead take directly a |
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* raw buffer object id from the driver's buffer manager (which is |
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* either GEM or TTM for current drivers). |
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* |
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* This entry point is deprecated, drivers should instead implement |
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* universal plane support and register a proper cursor plane using |
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* drm_crtc_init_with_planes(). |
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* |
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* This callback is optional |
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* |
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* RETURNS: |
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* |
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* 0 on success or a negative error code on failure. |
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*/ |
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int (*cursor_set)(struct drm_crtc *crtc, struct drm_file *file_priv, |
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uint32_t handle, uint32_t width, uint32_t height); |
|
|
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/** |
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* @cursor_set2: |
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* |
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* Update the cursor image, including hotspot information. The hotspot |
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* must not affect the cursor position in CRTC coordinates, but is only |
|
* meant as a hint for virtualized display hardware to coordinate the |
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* guests and hosts cursor position. The cursor hotspot is relative to |
|
* the cursor image. Otherwise this works exactly like @cursor_set. |
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* |
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* This entry point is deprecated, drivers should instead implement |
|
* universal plane support and register a proper cursor plane using |
|
* drm_crtc_init_with_planes(). |
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* |
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* This callback is optional. |
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* |
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* RETURNS: |
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* |
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* 0 on success or a negative error code on failure. |
|
*/ |
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int (*cursor_set2)(struct drm_crtc *crtc, struct drm_file *file_priv, |
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uint32_t handle, uint32_t width, uint32_t height, |
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int32_t hot_x, int32_t hot_y); |
|
|
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/** |
|
* @cursor_move: |
|
* |
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* Update the cursor position. The cursor does not need to be visible |
|
* when this hook is called. |
|
* |
|
* This entry point is deprecated, drivers should instead implement |
|
* universal plane support and register a proper cursor plane using |
|
* drm_crtc_init_with_planes(). |
|
* |
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* This callback is optional. |
|
* |
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* RETURNS: |
|
* |
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* 0 on success or a negative error code on failure. |
|
*/ |
|
int (*cursor_move)(struct drm_crtc *crtc, int x, int y); |
|
|
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/** |
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* @gamma_set: |
|
* |
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* Set gamma on the CRTC. |
|
* |
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* This callback is optional. |
|
* |
|
* Atomic drivers who want to support gamma tables should implement the |
|
* atomic color management support, enabled by calling |
|
* drm_crtc_enable_color_mgmt(), which then supports the legacy gamma |
|
* interface through the drm_atomic_helper_legacy_gamma_set() |
|
* compatibility implementation. |
|
*/ |
|
int (*gamma_set)(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b, |
|
uint32_t size, |
|
struct drm_modeset_acquire_ctx *ctx); |
|
|
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/** |
|
* @destroy: |
|
* |
|
* Clean up CRTC resources. This is only called at driver unload time |
|
* through drm_mode_config_cleanup() since a CRTC cannot be hotplugged |
|
* in DRM. |
|
*/ |
|
void (*destroy)(struct drm_crtc *crtc); |
|
|
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/** |
|
* @set_config: |
|
* |
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* This is the main legacy entry point to change the modeset state on a |
|
* CRTC. All the details of the desired configuration are passed in a |
|
* &struct drm_mode_set - see there for details. |
|
* |
|
* Drivers implementing atomic modeset should use |
|
* drm_atomic_helper_set_config() to implement this hook. |
|
* |
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* RETURNS: |
|
* |
|
* 0 on success or a negative error code on failure. |
|
*/ |
|
int (*set_config)(struct drm_mode_set *set, |
|
struct drm_modeset_acquire_ctx *ctx); |
|
|
|
/** |
|
* @page_flip: |
|
* |
|
* Legacy entry point to schedule a flip to the given framebuffer. |
|
* |
|
* Page flipping is a synchronization mechanism that replaces the frame |
|
* buffer being scanned out by the CRTC with a new frame buffer during |
|
* vertical blanking, avoiding tearing (except when requested otherwise |
|
* through the DRM_MODE_PAGE_FLIP_ASYNC flag). When an application |
|
* requests a page flip the DRM core verifies that the new frame buffer |
|
* is large enough to be scanned out by the CRTC in the currently |
|
* configured mode and then calls this hook with a pointer to the new |
|
* frame buffer. |
|
* |
|
* The driver must wait for any pending rendering to the new framebuffer |
|
* to complete before executing the flip. It should also wait for any |
|
* pending rendering from other drivers if the underlying buffer is a |
|
* shared dma-buf. |
|
* |
|
* An application can request to be notified when the page flip has |
|
* completed. The drm core will supply a &struct drm_event in the event |
|
* parameter in this case. This can be handled by the |
|
* drm_crtc_send_vblank_event() function, which the driver should call on |
|
* the provided event upon completion of the flip. Note that if |
|
* the driver supports vblank signalling and timestamping the vblank |
|
* counters and timestamps must agree with the ones returned from page |
|
* flip events. With the current vblank helper infrastructure this can |
|
* be achieved by holding a vblank reference while the page flip is |
|
* pending, acquired through drm_crtc_vblank_get() and released with |
|
* drm_crtc_vblank_put(). Drivers are free to implement their own vblank |
|
* counter and timestamp tracking though, e.g. if they have accurate |
|
* timestamp registers in hardware. |
|
* |
|
* This callback is optional. |
|
* |
|
* NOTE: |
|
* |
|
* Very early versions of the KMS ABI mandated that the driver must |
|
* block (but not reject) any rendering to the old framebuffer until the |
|
* flip operation has completed and the old framebuffer is no longer |
|
* visible. This requirement has been lifted, and userspace is instead |
|
* expected to request delivery of an event and wait with recycling old |
|
* buffers until such has been received. |
|
* |
|
* RETURNS: |
|
* |
|
* 0 on success or a negative error code on failure. Note that if a |
|
* page flip operation is already pending the callback should return |
|
* -EBUSY. Pageflips on a disabled CRTC (either by setting a NULL mode |
|
* or just runtime disabled through DPMS respectively the new atomic |
|
* "ACTIVE" state) should result in an -EINVAL error code. Note that |
|
* drm_atomic_helper_page_flip() checks this already for atomic drivers. |
|
*/ |
|
int (*page_flip)(struct drm_crtc *crtc, |
|
struct drm_framebuffer *fb, |
|
struct drm_pending_vblank_event *event, |
|
uint32_t flags, |
|
struct drm_modeset_acquire_ctx *ctx); |
|
|
|
/** |
|
* @page_flip_target: |
|
* |
|
* Same as @page_flip but with an additional parameter specifying the |
|
* absolute target vertical blank period (as reported by |
|
* drm_crtc_vblank_count()) when the flip should take effect. |
|
* |
|
* Note that the core code calls drm_crtc_vblank_get before this entry |
|
* point, and will call drm_crtc_vblank_put if this entry point returns |
|
* any non-0 error code. It's the driver's responsibility to call |
|
* drm_crtc_vblank_put after this entry point returns 0, typically when |
|
* the flip completes. |
|
*/ |
|
int (*page_flip_target)(struct drm_crtc *crtc, |
|
struct drm_framebuffer *fb, |
|
struct drm_pending_vblank_event *event, |
|
uint32_t flags, uint32_t target, |
|
struct drm_modeset_acquire_ctx *ctx); |
|
|
|
/** |
|
* @set_property: |
|
* |
|
* This is the legacy entry point to update a property attached to the |
|
* CRTC. |
|
* |
|
* This callback is optional if the driver does not support any legacy |
|
* driver-private properties. For atomic drivers it is not used because |
|
* property handling is done entirely in the DRM core. |
|
* |
|
* RETURNS: |
|
* |
|
* 0 on success or a negative error code on failure. |
|
*/ |
|
int (*set_property)(struct drm_crtc *crtc, |
|
struct drm_property *property, uint64_t val); |
|
|
|
/** |
|
* @atomic_duplicate_state: |
|
* |
|
* Duplicate the current atomic state for this CRTC and return it. |
|
* The core and helpers guarantee that any atomic state duplicated with |
|
* this hook and still owned by the caller (i.e. not transferred to the |
|
* driver by calling &drm_mode_config_funcs.atomic_commit) will be |
|
* cleaned up by calling the @atomic_destroy_state hook in this |
|
* structure. |
|
* |
|
* This callback is mandatory for atomic drivers. |
|
* |
|
* Atomic drivers which don't subclass &struct drm_crtc_state should use |
|
* drm_atomic_helper_crtc_duplicate_state(). Drivers that subclass the |
|
* state structure to extend it with driver-private state should use |
|
* __drm_atomic_helper_crtc_duplicate_state() to make sure shared state is |
|
* duplicated in a consistent fashion across drivers. |
|
* |
|
* It is an error to call this hook before &drm_crtc.state has been |
|
* initialized correctly. |
|
* |
|
* NOTE: |
|
* |
|
* If the duplicate state references refcounted resources this hook must |
|
* acquire a reference for each of them. The driver must release these |
|
* references again in @atomic_destroy_state. |
|
* |
|
* RETURNS: |
|
* |
|
* Duplicated atomic state or NULL when the allocation failed. |
|
*/ |
|
struct drm_crtc_state *(*atomic_duplicate_state)(struct drm_crtc *crtc); |
|
|
|
/** |
|
* @atomic_destroy_state: |
|
* |
|
* Destroy a state duplicated with @atomic_duplicate_state and release |
|
* or unreference all resources it references |
|
* |
|
* This callback is mandatory for atomic drivers. |
|
*/ |
|
void (*atomic_destroy_state)(struct drm_crtc *crtc, |
|
struct drm_crtc_state *state); |
|
|
|
/** |
|
* @atomic_set_property: |
|
* |
|
* Decode a driver-private property value and store the decoded value |
|
* into the passed-in state structure. Since the atomic core decodes all |
|
* standardized properties (even for extensions beyond the core set of |
|
* properties which might not be implemented by all drivers) this |
|
* requires drivers to subclass the state structure. |
|
* |
|
* Such driver-private properties should really only be implemented for |
|
* truly hardware/vendor specific state. Instead it is preferred to |
|
* standardize atomic extension and decode the properties used to expose |
|
* such an extension in the core. |
|
* |
|
* Do not call this function directly, use |
|
* drm_atomic_crtc_set_property() instead. |
|
* |
|
* This callback is optional if the driver does not support any |
|
* driver-private atomic properties. |
|
* |
|
* NOTE: |
|
* |
|
* This function is called in the state assembly phase of atomic |
|
* modesets, which can be aborted for any reason (including on |
|
* userspace's request to just check whether a configuration would be |
|
* possible). Drivers MUST NOT touch any persistent state (hardware or |
|
* software) or data structures except the passed in @state parameter. |
|
* |
|
* Also since userspace controls in which order properties are set this |
|
* function must not do any input validation (since the state update is |
|
* incomplete and hence likely inconsistent). Instead any such input |
|
* validation must be done in the various atomic_check callbacks. |
|
* |
|
* RETURNS: |
|
* |
|
* 0 if the property has been found, -EINVAL if the property isn't |
|
* implemented by the driver (which should never happen, the core only |
|
* asks for properties attached to this CRTC). No other validation is |
|
* allowed by the driver. The core already checks that the property |
|
* value is within the range (integer, valid enum value, ...) the driver |
|
* set when registering the property. |
|
*/ |
|
int (*atomic_set_property)(struct drm_crtc *crtc, |
|
struct drm_crtc_state *state, |
|
struct drm_property *property, |
|
uint64_t val); |
|
/** |
|
* @atomic_get_property: |
|
* |
|
* Reads out the decoded driver-private property. This is used to |
|
* implement the GETCRTC IOCTL. |
|
* |
|
* Do not call this function directly, use |
|
* drm_atomic_crtc_get_property() instead. |
|
* |
|
* This callback is optional if the driver does not support any |
|
* driver-private atomic properties. |
|
* |
|
* RETURNS: |
|
* |
|
* 0 on success, -EINVAL if the property isn't implemented by the |
|
* driver (which should never happen, the core only asks for |
|
* properties attached to this CRTC). |
|
*/ |
|
int (*atomic_get_property)(struct drm_crtc *crtc, |
|
const struct drm_crtc_state *state, |
|
struct drm_property *property, |
|
uint64_t *val); |
|
|
|
/** |
|
* @late_register: |
|
* |
|
* This optional hook can be used to register additional userspace |
|
* interfaces attached to the crtc like debugfs interfaces. |
|
* It is called late in the driver load sequence from drm_dev_register(). |
|
* Everything added from this callback should be unregistered in |
|
* the early_unregister callback. |
|
* |
|
* Returns: |
|
* |
|
* 0 on success, or a negative error code on failure. |
|
*/ |
|
int (*late_register)(struct drm_crtc *crtc); |
|
|
|
/** |
|
* @early_unregister: |
|
* |
|
* This optional hook should be used to unregister the additional |
|
* userspace interfaces attached to the crtc from |
|
* @late_register. It is called from drm_dev_unregister(), |
|
* early in the driver unload sequence to disable userspace access |
|
* before data structures are torndown. |
|
*/ |
|
void (*early_unregister)(struct drm_crtc *crtc); |
|
|
|
/** |
|
* @set_crc_source: |
|
* |
|
* Changes the source of CRC checksums of frames at the request of |
|
* userspace, typically for testing purposes. The sources available are |
|
* specific of each driver and a %NULL value indicates that CRC |
|
* generation is to be switched off. |
|
* |
|
* When CRC generation is enabled, the driver should call |
|
* drm_crtc_add_crc_entry() at each frame, providing any information |
|
* that characterizes the frame contents in the crcN arguments, as |
|
* provided from the configured source. Drivers must accept an "auto" |
|
* source name that will select a default source for this CRTC. |
|
* |
|
* This may trigger an atomic modeset commit if necessary, to enable CRC |
|
* generation. |
|
* |
|
* Note that "auto" can depend upon the current modeset configuration, |
|
* e.g. it could pick an encoder or output specific CRC sampling point. |
|
* |
|
* This callback is optional if the driver does not support any CRC |
|
* generation functionality. |
|
* |
|
* RETURNS: |
|
* |
|
* 0 on success or a negative error code on failure. |
|
*/ |
|
int (*set_crc_source)(struct drm_crtc *crtc, const char *source); |
|
|
|
/** |
|
* @verify_crc_source: |
|
* |
|
* verifies the source of CRC checksums of frames before setting the |
|
* source for CRC and during crc open. Source parameter can be NULL |
|
* while disabling crc source. |
|
* |
|
* This callback is optional if the driver does not support any CRC |
|
* generation functionality. |
|
* |
|
* RETURNS: |
|
* |
|
* 0 on success or a negative error code on failure. |
|
*/ |
|
int (*verify_crc_source)(struct drm_crtc *crtc, const char *source, |
|
size_t *values_cnt); |
|
/** |
|
* @get_crc_sources: |
|
* |
|
* Driver callback for getting a list of all the available sources for |
|
* CRC generation. This callback depends upon verify_crc_source, So |
|
* verify_crc_source callback should be implemented before implementing |
|
* this. Driver can pass full list of available crc sources, this |
|
* callback does the verification on each crc-source before passing it |
|
* to userspace. |
|
* |
|
* This callback is optional if the driver does not support exporting of |
|
* possible CRC sources list. |
|
* |
|
* RETURNS: |
|
* |
|
* a constant character pointer to the list of all the available CRC |
|
* sources. On failure driver should return NULL. count should be |
|
* updated with number of sources in list. if zero we don't process any |
|
* source from the list. |
|
*/ |
|
const char *const *(*get_crc_sources)(struct drm_crtc *crtc, |
|
size_t *count); |
|
|
|
/** |
|
* @atomic_print_state: |
|
* |
|
* If driver subclasses &struct drm_crtc_state, it should implement |
|
* this optional hook for printing additional driver specific state. |
|
* |
|
* Do not call this directly, use drm_atomic_crtc_print_state() |
|
* instead. |
|
*/ |
|
void (*atomic_print_state)(struct drm_printer *p, |
|
const struct drm_crtc_state *state); |
|
|
|
/** |
|
* @get_vblank_counter: |
|
* |
|
* Driver callback for fetching a raw hardware vblank counter for the |
|
* CRTC. It's meant to be used by new drivers as the replacement of |
|
* &drm_driver.get_vblank_counter hook. |
|
* |
|
* This callback is optional. If a device doesn't have a hardware |
|
* counter, the driver can simply leave the hook as NULL. The DRM core |
|
* will account for missed vblank events while interrupts where disabled |
|
* based on system timestamps. |
|
* |
|
* Wraparound handling and loss of events due to modesetting is dealt |
|
* with in the DRM core code, as long as drivers call |
|
* drm_crtc_vblank_off() and drm_crtc_vblank_on() when disabling or |
|
* enabling a CRTC. |
|
* |
|
* See also &drm_device.vblank_disable_immediate and |
|
* &drm_device.max_vblank_count. |
|
* |
|
* Returns: |
|
* |
|
* Raw vblank counter value. |
|
*/ |
|
u32 (*get_vblank_counter)(struct drm_crtc *crtc); |
|
|
|
/** |
|
* @enable_vblank: |
|
* |
|
* Enable vblank interrupts for the CRTC. It's meant to be used by |
|
* new drivers as the replacement of &drm_driver.enable_vblank hook. |
|
* |
|
* Returns: |
|
* |
|
* Zero on success, appropriate errno if the vblank interrupt cannot |
|
* be enabled. |
|
*/ |
|
int (*enable_vblank)(struct drm_crtc *crtc); |
|
|
|
/** |
|
* @disable_vblank: |
|
* |
|
* Disable vblank interrupts for the CRTC. It's meant to be used by |
|
* new drivers as the replacement of &drm_driver.disable_vblank hook. |
|
*/ |
|
void (*disable_vblank)(struct drm_crtc *crtc); |
|
|
|
/** |
|
* @get_vblank_timestamp: |
|
* |
|
* Called by drm_get_last_vbltimestamp(). Should return a precise |
|
* timestamp when the most recent vblank interval ended or will end. |
|
* |
|
* Specifically, the timestamp in @vblank_time should correspond as |
|
* closely as possible to the time when the first video scanline of |
|
* the video frame after the end of vblank will start scanning out, |
|
* the time immediately after end of the vblank interval. If the |
|
* @crtc is currently inside vblank, this will be a time in the future. |
|
* If the @crtc is currently scanning out a frame, this will be the |
|
* past start time of the current scanout. This is meant to adhere |
|
* to the OpenML OML_sync_control extension specification. |
|
* |
|
* Parameters: |
|
* |
|
* crtc: |
|
* CRTC for which timestamp should be returned. |
|
* max_error: |
|
* Maximum allowable timestamp error in nanoseconds. |
|
* Implementation should strive to provide timestamp |
|
* with an error of at most max_error nanoseconds. |
|
* Returns true upper bound on error for timestamp. |
|
* vblank_time: |
|
* Target location for returned vblank timestamp. |
|
* in_vblank_irq: |
|
* True when called from drm_crtc_handle_vblank(). Some drivers |
|
* need to apply some workarounds for gpu-specific vblank irq quirks |
|
* if flag is set. |
|
* |
|
* Returns: |
|
* |
|
* True on success, false on failure, which means the core should |
|
* fallback to a simple timestamp taken in drm_crtc_handle_vblank(). |
|
*/ |
|
bool (*get_vblank_timestamp)(struct drm_crtc *crtc, |
|
int *max_error, |
|
ktime_t *vblank_time, |
|
bool in_vblank_irq); |
|
}; |
|
|
|
/** |
|
* struct drm_crtc - central CRTC control structure |
|
* |
|
* Each CRTC may have one or more connectors associated with it. This structure |
|
* allows the CRTC to be controlled. |
|
*/ |
|
struct drm_crtc { |
|
/** @dev: parent DRM device */ |
|
struct drm_device *dev; |
|
/** @port: OF node used by drm_of_find_possible_crtcs(). */ |
|
struct device_node *port; |
|
/** |
|
* @head: |
|
* |
|
* List of all CRTCs on @dev, linked from &drm_mode_config.crtc_list. |
|
* Invariant over the lifetime of @dev and therefore does not need |
|
* locking. |
|
*/ |
|
struct list_head head; |
|
|
|
/** @name: human readable name, can be overwritten by the driver */ |
|
char *name; |
|
|
|
/** |
|
* @mutex: |
|
* |
|
* This provides a read lock for the overall CRTC state (mode, dpms |
|
* state, ...) and a write lock for everything which can be update |
|
* without a full modeset (fb, cursor data, CRTC properties ...). A full |
|
* modeset also need to grab &drm_mode_config.connection_mutex. |
|
* |
|
* For atomic drivers specifically this protects @state. |
|
*/ |
|
struct drm_modeset_lock mutex; |
|
|
|
/** @base: base KMS object for ID tracking etc. */ |
|
struct drm_mode_object base; |
|
|
|
/** |
|
* @primary: |
|
* Primary plane for this CRTC. Note that this is only |
|
* relevant for legacy IOCTL, it specifies the plane implicitly used by |
|
* the SETCRTC and PAGE_FLIP IOCTLs. It does not have any significance |
|
* beyond that. |
|
*/ |
|
struct drm_plane *primary; |
|
|
|
/** |
|
* @cursor: |
|
* Cursor plane for this CRTC. Note that this is only relevant for |
|
* legacy IOCTL, it specifies the plane implicitly used by the SETCURSOR |
|
* and SETCURSOR2 IOCTLs. It does not have any significance |
|
* beyond that. |
|
*/ |
|
struct drm_plane *cursor; |
|
|
|
/** |
|
* @index: Position inside the mode_config.list, can be used as an array |
|
* index. It is invariant over the lifetime of the CRTC. |
|
*/ |
|
unsigned index; |
|
|
|
/** |
|
* @cursor_x: Current x position of the cursor, used for universal |
|
* cursor planes because the SETCURSOR IOCTL only can update the |
|
* framebuffer without supplying the coordinates. Drivers should not use |
|
* this directly, atomic drivers should look at &drm_plane_state.crtc_x |
|
* of the cursor plane instead. |
|
*/ |
|
int cursor_x; |
|
/** |
|
* @cursor_y: Current y position of the cursor, used for universal |
|
* cursor planes because the SETCURSOR IOCTL only can update the |
|
* framebuffer without supplying the coordinates. Drivers should not use |
|
* this directly, atomic drivers should look at &drm_plane_state.crtc_y |
|
* of the cursor plane instead. |
|
*/ |
|
int cursor_y; |
|
|
|
/** |
|
* @enabled: |
|
* |
|
* Is this CRTC enabled? Should only be used by legacy drivers, atomic |
|
* drivers should instead consult &drm_crtc_state.enable and |
|
* &drm_crtc_state.active. Atomic drivers can update this by calling |
|
* drm_atomic_helper_update_legacy_modeset_state(). |
|
*/ |
|
bool enabled; |
|
|
|
/** |
|
* @mode: |
|
* |
|
* Current mode timings. Should only be used by legacy drivers, atomic |
|
* drivers should instead consult &drm_crtc_state.mode. Atomic drivers |
|
* can update this by calling |
|
* drm_atomic_helper_update_legacy_modeset_state(). |
|
*/ |
|
struct drm_display_mode mode; |
|
|
|
/** |
|
* @hwmode: |
|
* |
|
* Programmed mode in hw, after adjustments for encoders, crtc, panel |
|
* scaling etc. Should only be used by legacy drivers, for high |
|
* precision vblank timestamps in |
|
* drm_crtc_vblank_helper_get_vblank_timestamp(). |
|
* |
|
* Note that atomic drivers should not use this, but instead use |
|
* &drm_crtc_state.adjusted_mode. And for high-precision timestamps |
|
* drm_crtc_vblank_helper_get_vblank_timestamp() used |
|
* &drm_vblank_crtc.hwmode, |
|
* which is filled out by calling drm_calc_timestamping_constants(). |
|
*/ |
|
struct drm_display_mode hwmode; |
|
|
|
/** |
|
* @x: |
|
* x position on screen. Should only be used by legacy drivers, atomic |
|
* drivers should look at &drm_plane_state.crtc_x of the primary plane |
|
* instead. Updated by calling |
|
* drm_atomic_helper_update_legacy_modeset_state(). |
|
*/ |
|
int x; |
|
/** |
|
* @y: |
|
* y position on screen. Should only be used by legacy drivers, atomic |
|
* drivers should look at &drm_plane_state.crtc_y of the primary plane |
|
* instead. Updated by calling |
|
* drm_atomic_helper_update_legacy_modeset_state(). |
|
*/ |
|
int y; |
|
|
|
/** @funcs: CRTC control functions */ |
|
const struct drm_crtc_funcs *funcs; |
|
|
|
/** |
|
* @gamma_size: Size of legacy gamma ramp reported to userspace. Set up |
|
* by calling drm_mode_crtc_set_gamma_size(). |
|
*/ |
|
uint32_t gamma_size; |
|
|
|
/** |
|
* @gamma_store: Gamma ramp values used by the legacy SETGAMMA and |
|
* GETGAMMA IOCTls. Set up by calling drm_mode_crtc_set_gamma_size(). |
|
*/ |
|
uint16_t *gamma_store; |
|
|
|
/** @helper_private: mid-layer private data */ |
|
const struct drm_crtc_helper_funcs *helper_private; |
|
|
|
/** @properties: property tracking for this CRTC */ |
|
struct drm_object_properties properties; |
|
|
|
/** |
|
* @scaling_filter_property: property to apply a particular filter while |
|
* scaling. |
|
*/ |
|
struct drm_property *scaling_filter_property; |
|
|
|
/** |
|
* @state: |
|
* |
|
* Current atomic state for this CRTC. |
|
* |
|
* This is protected by @mutex. Note that nonblocking atomic commits |
|
* access the current CRTC state without taking locks. Either by going |
|
* through the &struct drm_atomic_state pointers, see |
|
* for_each_oldnew_crtc_in_state(), for_each_old_crtc_in_state() and |
|
* for_each_new_crtc_in_state(). Or through careful ordering of atomic |
|
* commit operations as implemented in the atomic helpers, see |
|
* &struct drm_crtc_commit. |
|
*/ |
|
struct drm_crtc_state *state; |
|
|
|
/** |
|
* @commit_list: |
|
* |
|
* List of &drm_crtc_commit structures tracking pending commits. |
|
* Protected by @commit_lock. This list holds its own full reference, |
|
* as does the ongoing commit. |
|
* |
|
* "Note that the commit for a state change is also tracked in |
|
* &drm_crtc_state.commit. For accessing the immediately preceding |
|
* commit in an atomic update it is recommended to just use that |
|
* pointer in the old CRTC state, since accessing that doesn't need |
|
* any locking or list-walking. @commit_list should only be used to |
|
* stall for framebuffer cleanup that's signalled through |
|
* &drm_crtc_commit.cleanup_done." |
|
*/ |
|
struct list_head commit_list; |
|
|
|
/** |
|
* @commit_lock: |
|
* |
|
* Spinlock to protect @commit_list. |
|
*/ |
|
spinlock_t commit_lock; |
|
|
|
#ifdef CONFIG_DEBUG_FS |
|
/** |
|
* @debugfs_entry: |
|
* |
|
* Debugfs directory for this CRTC. |
|
*/ |
|
struct dentry *debugfs_entry; |
|
#endif |
|
|
|
/** |
|
* @crc: |
|
* |
|
* Configuration settings of CRC capture. |
|
*/ |
|
struct drm_crtc_crc crc; |
|
|
|
/** |
|
* @fence_context: |
|
* |
|
* timeline context used for fence operations. |
|
*/ |
|
unsigned int fence_context; |
|
|
|
/** |
|
* @fence_lock: |
|
* |
|
* spinlock to protect the fences in the fence_context. |
|
*/ |
|
spinlock_t fence_lock; |
|
/** |
|
* @fence_seqno: |
|
* |
|
* Seqno variable used as monotonic counter for the fences |
|
* created on the CRTC's timeline. |
|
*/ |
|
unsigned long fence_seqno; |
|
|
|
/** |
|
* @timeline_name: |
|
* |
|
* The name of the CRTC's fence timeline. |
|
*/ |
|
char timeline_name[32]; |
|
|
|
/** |
|
* @self_refresh_data: Holds the state for the self refresh helpers |
|
* |
|
* Initialized via drm_self_refresh_helper_init(). |
|
*/ |
|
struct drm_self_refresh_data *self_refresh_data; |
|
}; |
|
|
|
/** |
|
* struct drm_mode_set - new values for a CRTC config change |
|
* @fb: framebuffer to use for new config |
|
* @crtc: CRTC whose configuration we're about to change |
|
* @mode: mode timings to use |
|
* @x: position of this CRTC relative to @fb |
|
* @y: position of this CRTC relative to @fb |
|
* @connectors: array of connectors to drive with this CRTC if possible |
|
* @num_connectors: size of @connectors array |
|
* |
|
* This represents a modeset configuration for the legacy SETCRTC ioctl and is |
|
* also used internally. Atomic drivers instead use &drm_atomic_state. |
|
*/ |
|
struct drm_mode_set { |
|
struct drm_framebuffer *fb; |
|
struct drm_crtc *crtc; |
|
struct drm_display_mode *mode; |
|
|
|
uint32_t x; |
|
uint32_t y; |
|
|
|
struct drm_connector **connectors; |
|
size_t num_connectors; |
|
}; |
|
|
|
#define obj_to_crtc(x) container_of(x, struct drm_crtc, base) |
|
|
|
__printf(6, 7) |
|
int drm_crtc_init_with_planes(struct drm_device *dev, |
|
struct drm_crtc *crtc, |
|
struct drm_plane *primary, |
|
struct drm_plane *cursor, |
|
const struct drm_crtc_funcs *funcs, |
|
const char *name, ...); |
|
void drm_crtc_cleanup(struct drm_crtc *crtc); |
|
|
|
__printf(7, 8) |
|
void *__drmm_crtc_alloc_with_planes(struct drm_device *dev, |
|
size_t size, size_t offset, |
|
struct drm_plane *primary, |
|
struct drm_plane *cursor, |
|
const struct drm_crtc_funcs *funcs, |
|
const char *name, ...); |
|
|
|
/** |
|
* drmm_crtc_alloc_with_planes - Allocate and initialize a new CRTC object with |
|
* specified primary and cursor planes. |
|
* @dev: DRM device |
|
* @type: the type of the struct which contains struct &drm_crtc |
|
* @member: the name of the &drm_crtc within @type. |
|
* @primary: Primary plane for CRTC |
|
* @cursor: Cursor plane for CRTC |
|
* @funcs: callbacks for the new CRTC |
|
* @name: printf style format string for the CRTC name, or NULL for default name |
|
* |
|
* Allocates and initializes a new crtc object. Cleanup is automatically |
|
* handled through registering drmm_crtc_cleanup() with drmm_add_action(). |
|
* |
|
* The @drm_crtc_funcs.destroy hook must be NULL. |
|
* |
|
* Returns: |
|
* Pointer to new crtc, or ERR_PTR on failure. |
|
*/ |
|
#define drmm_crtc_alloc_with_planes(dev, type, member, primary, cursor, funcs, name, ...) \ |
|
((type *)__drmm_crtc_alloc_with_planes(dev, sizeof(type), \ |
|
offsetof(type, member), \ |
|
primary, cursor, funcs, \ |
|
name, ##__VA_ARGS__)) |
|
|
|
/** |
|
* drm_crtc_index - find the index of a registered CRTC |
|
* @crtc: CRTC to find index for |
|
* |
|
* Given a registered CRTC, return the index of that CRTC within a DRM |
|
* device's list of CRTCs. |
|
*/ |
|
static inline unsigned int drm_crtc_index(const struct drm_crtc *crtc) |
|
{ |
|
return crtc->index; |
|
} |
|
|
|
/** |
|
* drm_crtc_mask - find the mask of a registered CRTC |
|
* @crtc: CRTC to find mask for |
|
* |
|
* Given a registered CRTC, return the mask bit of that CRTC for the |
|
* &drm_encoder.possible_crtcs and &drm_plane.possible_crtcs fields. |
|
*/ |
|
static inline uint32_t drm_crtc_mask(const struct drm_crtc *crtc) |
|
{ |
|
return 1 << drm_crtc_index(crtc); |
|
} |
|
|
|
int drm_mode_set_config_internal(struct drm_mode_set *set); |
|
struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx); |
|
|
|
/** |
|
* drm_crtc_find - look up a CRTC object from its ID |
|
* @dev: DRM device |
|
* @file_priv: drm file to check for lease against. |
|
* @id: &drm_mode_object ID |
|
* |
|
* This can be used to look up a CRTC from its userspace ID. Only used by |
|
* drivers for legacy IOCTLs and interface, nowadays extensions to the KMS |
|
* userspace interface should be done using &drm_property. |
|
*/ |
|
static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev, |
|
struct drm_file *file_priv, |
|
uint32_t id) |
|
{ |
|
struct drm_mode_object *mo; |
|
mo = drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_CRTC); |
|
return mo ? obj_to_crtc(mo) : NULL; |
|
} |
|
|
|
/** |
|
* drm_for_each_crtc - iterate over all CRTCs |
|
* @crtc: a &struct drm_crtc as the loop cursor |
|
* @dev: the &struct drm_device |
|
* |
|
* Iterate over all CRTCs of @dev. |
|
*/ |
|
#define drm_for_each_crtc(crtc, dev) \ |
|
list_for_each_entry(crtc, &(dev)->mode_config.crtc_list, head) |
|
|
|
/** |
|
* drm_for_each_crtc_reverse - iterate over all CRTCs in reverse order |
|
* @crtc: a &struct drm_crtc as the loop cursor |
|
* @dev: the &struct drm_device |
|
* |
|
* Iterate over all CRTCs of @dev. |
|
*/ |
|
#define drm_for_each_crtc_reverse(crtc, dev) \ |
|
list_for_each_entry_reverse(crtc, &(dev)->mode_config.crtc_list, head) |
|
|
|
int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, |
|
unsigned int supported_filters); |
|
|
|
#endif /* __DRM_CRTC_H__ */
|
|
|