207 lines
6.1 KiB
C
207 lines
6.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*/
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#ifndef __MSM_KMS_H__
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#define __MSM_KMS_H__
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#include <linux/clk.h>
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#include <linux/regulator/consumer.h>
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#include "msm_drv.h"
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#define MAX_PLANE 4
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/* As there are different display controller blocks depending on the
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* snapdragon version, the kms support is split out and the appropriate
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* implementation is loaded at runtime. The kms module is responsible
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* for constructing the appropriate planes/crtcs/encoders/connectors.
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*/
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struct msm_kms_funcs {
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/* hw initialization: */
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int (*hw_init)(struct msm_kms *kms);
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/* irq handling: */
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void (*irq_preinstall)(struct msm_kms *kms);
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int (*irq_postinstall)(struct msm_kms *kms);
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void (*irq_uninstall)(struct msm_kms *kms);
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irqreturn_t (*irq)(struct msm_kms *kms);
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int (*enable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
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void (*disable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);
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/*
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* Atomic commit handling:
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*
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* Note that in the case of async commits, the funcs which take
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* a crtc_mask (ie. ->flush_commit(), and ->complete_commit())
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* might not be evenly balanced with ->prepare_commit(), however
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* each crtc that effected by a ->prepare_commit() (potentially
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* multiple times) will eventually (at end of vsync period) be
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* flushed and completed.
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*
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* This has some implications about tracking of cleanup state,
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* for example SMP blocks to release after commit completes. Ie.
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* cleanup state should be also duplicated in the various
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* duplicate_state() methods, as the current cleanup state at
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* ->complete_commit() time may have accumulated cleanup work
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* from multiple commits.
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*/
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/**
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* Enable/disable power/clks needed for hw access done in other
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* commit related methods.
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*
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* If mdp4 is migrated to runpm, we could probably drop these
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* and use runpm directly.
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*/
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void (*enable_commit)(struct msm_kms *kms);
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void (*disable_commit)(struct msm_kms *kms);
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/**
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* If the kms backend supports async commit, it should implement
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* this method to return the time of the next vsync. This is
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* used to determine a time slightly before vsync, for the async
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* commit timer to run and complete an async commit.
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*/
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ktime_t (*vsync_time)(struct msm_kms *kms, struct drm_crtc *crtc);
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/**
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* Prepare for atomic commit. This is called after any previous
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* (async or otherwise) commit has completed.
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*/
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void (*prepare_commit)(struct msm_kms *kms, struct drm_atomic_state *state);
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/**
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* Flush an atomic commit. This is called after the hardware
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* updates have already been pushed down to effected planes/
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* crtcs/encoders/connectors.
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*/
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void (*flush_commit)(struct msm_kms *kms, unsigned crtc_mask);
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/**
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* Wait for any in-progress flush to complete on the specified
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* crtcs. This should not block if there is no in-progress
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* commit (ie. don't just wait for a vblank), as it will also
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* be called before ->prepare_commit() to ensure any potential
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* "async" commit has completed.
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*/
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void (*wait_flush)(struct msm_kms *kms, unsigned crtc_mask);
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/**
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* Clean up after commit is completed. This is called after
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* ->wait_flush(), to give the backend a chance to do any
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* post-commit cleanup.
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*/
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void (*complete_commit)(struct msm_kms *kms, unsigned crtc_mask);
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/*
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* Format handling:
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*/
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/* get msm_format w/ optional format modifiers from drm_mode_fb_cmd2 */
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const struct msm_format *(*get_format)(struct msm_kms *kms,
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const uint32_t format,
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const uint64_t modifiers);
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/* do format checking on format modified through fb_cmd2 modifiers */
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int (*check_modified_format)(const struct msm_kms *kms,
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const struct msm_format *msm_fmt,
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const struct drm_mode_fb_cmd2 *cmd,
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struct drm_gem_object **bos);
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/* misc: */
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long (*round_pixclk)(struct msm_kms *kms, unsigned long rate,
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struct drm_encoder *encoder);
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int (*set_split_display)(struct msm_kms *kms,
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struct drm_encoder *encoder,
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struct drm_encoder *slave_encoder,
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bool is_cmd_mode);
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/* cleanup: */
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void (*destroy)(struct msm_kms *kms);
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/* snapshot: */
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void (*snapshot)(struct msm_disp_state *disp_state, struct msm_kms *kms);
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#ifdef CONFIG_DEBUG_FS
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/* debugfs: */
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int (*debugfs_init)(struct msm_kms *kms, struct drm_minor *minor);
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#endif
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};
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struct msm_kms;
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/*
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* A per-crtc timer for pending async atomic flushes. Scheduled to expire
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* shortly before vblank to flush pending async updates.
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*/
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struct msm_pending_timer {
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struct msm_hrtimer_work work;
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struct kthread_worker *worker;
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struct msm_kms *kms;
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unsigned crtc_idx;
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};
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struct msm_kms {
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const struct msm_kms_funcs *funcs;
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struct drm_device *dev;
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/* irq number to be passed on to msm_irq_install */
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int irq;
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bool irq_requested;
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/* mapper-id used to request GEM buffer mapped for scanout: */
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struct msm_gem_address_space *aspace;
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/* disp snapshot support */
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struct kthread_worker *dump_worker;
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struct kthread_work dump_work;
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struct mutex dump_mutex;
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/*
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* For async commit, where ->flush_commit() and later happens
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* from the crtc's pending_timer close to end of the frame:
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*/
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struct mutex commit_lock[MAX_CRTCS];
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unsigned pending_crtc_mask;
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struct msm_pending_timer pending_timers[MAX_CRTCS];
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};
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static inline int msm_kms_init(struct msm_kms *kms,
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const struct msm_kms_funcs *funcs)
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{
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unsigned i, ret;
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for (i = 0; i < ARRAY_SIZE(kms->commit_lock); i++)
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mutex_init(&kms->commit_lock[i]);
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kms->funcs = funcs;
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for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) {
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ret = msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i);
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if (ret) {
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return ret;
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}
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}
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return 0;
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}
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static inline void msm_kms_destroy(struct msm_kms *kms)
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++)
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msm_atomic_destroy_pending_timer(&kms->pending_timers[i]);
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}
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#define for_each_crtc_mask(dev, crtc, crtc_mask) \
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drm_for_each_crtc(crtc, dev) \
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for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
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#define for_each_crtc_mask_reverse(dev, crtc, crtc_mask) \
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drm_for_each_crtc_reverse(crtc, dev) \
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for_each_if (drm_crtc_mask(crtc) & (crtc_mask))
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#endif /* __MSM_KMS_H__ */
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