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Some display controllers can be hardware programmed to show non-black colors for pixels that are either not covered by any plane or are exposed through transparent regions of higher planes. This feature can help reduce memory bandwidth usage, e.g. in compositors managing a UI with a solid background color while using smaller planes to render the remaining content. To support this capability, introduce the BACKGROUND_COLOR standard DRM mode property, which can be attached to a CRTC through the drm_crtc_attach_background_color_property() helper function. Additionally, define a 64-bit ARGB format value to be built with the help of a couple of dedicated DRM_ARGB64_PREP*() helpers. Individual color components can be extracted with desired precision using the corresponding DRM_ARGB64_GET*() macros. Co-developed-by: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> Tested-by: Diederik de Haas <diederik@cknow-tech.com> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com> Link: https://patch.msgid.link/20260303-rk3588-bgcolor-v8-2-fee377037ad1@collabora.com Signed-off-by: Daniel Stone <daniels@collabora.com>
64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#ifndef __DRM_BLEND_H__
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#define __DRM_BLEND_H__
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#include <linux/list.h>
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#include <linux/ctype.h>
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#include <drm/drm_mode.h>
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#define DRM_MODE_BLEND_PREMULTI 0
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#define DRM_MODE_BLEND_COVERAGE 1
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#define DRM_MODE_BLEND_PIXEL_NONE 2
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struct drm_atomic_state;
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struct drm_crtc;
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struct drm_device;
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struct drm_plane;
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static inline bool drm_rotation_90_or_270(unsigned int rotation)
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{
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return rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270);
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}
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#define DRM_BLEND_ALPHA_OPAQUE 0xffff
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int drm_plane_create_alpha_property(struct drm_plane *plane);
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int drm_plane_create_rotation_property(struct drm_plane *plane,
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unsigned int rotation,
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unsigned int supported_rotations);
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unsigned int drm_rotation_simplify(unsigned int rotation,
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unsigned int supported_rotations);
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int drm_plane_create_zpos_property(struct drm_plane *plane,
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unsigned int zpos,
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unsigned int min, unsigned int max);
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int drm_plane_create_zpos_immutable_property(struct drm_plane *plane,
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unsigned int zpos);
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int drm_atomic_normalize_zpos(struct drm_device *dev,
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struct drm_atomic_state *state);
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int drm_plane_create_blend_mode_property(struct drm_plane *plane,
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unsigned int supported_modes);
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void drm_crtc_attach_background_color_property(struct drm_crtc *crtc);
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#endif
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