forked from Minki/linux
894558ec8c
Add the stuff needed to allow dynamically assigning a mixer to a CRTC. Since mixers are a resource that can be shared across multiple CRTCs, we need to maintain a 'hwmixer_to_crtc' map in the global atomic state, acquire the mdp5_kms.state_lock modeset lock and so on. The mixer is assigned in the CRTC's atomic_check() func, a failure will result in the new state being cleanly rolled back. The mixer assignment itself is straightforward, and almost identical to what we do for hwpipes. We don't need to grab the old hwmixer_to_crtc state like we do in hwpipes since we don't need to compare anything with the old state at the moment. The only LM capability we care about at the moment is whether the mixer instance can be used to display stuff (i.e, connect to an INTF downstream). Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/*
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* Copyright (C) 2017 The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MDP5_LM_H__
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#define __MDP5_LM_H__
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/* represents a hw Layer Mixer, one (or more) is dynamically assigned to a crtc */
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struct mdp5_hw_mixer {
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int idx;
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const char *name;
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int lm; /* the LM instance # */
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uint32_t caps;
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int pp;
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int dspp;
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uint32_t flush_mask; /* used to commit LM registers */
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};
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/* global atomic state of assignment between CRTCs and Layer Mixers: */
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struct mdp5_hw_mixer_state {
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struct drm_crtc *hwmixer_to_crtc[8];
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};
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struct mdp5_hw_mixer *mdp5_mixer_init(const struct mdp5_lm_instance *lm);
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void mdp5_mixer_destroy(struct mdp5_hw_mixer *lm);
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struct mdp5_hw_mixer *mdp5_mixer_assign(struct drm_atomic_state *s,
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struct drm_crtc *crtc, uint32_t caps);
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void mdp5_mixer_release(struct drm_atomic_state *s,
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struct mdp5_hw_mixer *mixer);
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#endif /* __MDP5_LM_H__ */
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