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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.4 * Copyright (C) 2013 Red Hat5 * Author: Rob Clark <robdclark@gmail.com>6 */7 8#ifndef __MSM_KMS_H__9#define __MSM_KMS_H__10 11#include <linux/clk.h>12#include <linux/regulator/consumer.h>13 14#include "msm_drv.h"15 16#define MAX_PLANE 417 18/* As there are different display controller blocks depending on the19 * snapdragon version, the kms support is split out and the appropriate20 * implementation is loaded at runtime. The kms module is responsible21 * for constructing the appropriate planes/crtcs/encoders/connectors.22 */23struct msm_kms_funcs {24 /* hw initialization: */25 int (*hw_init)(struct msm_kms *kms);26 /* irq handling: */27 void (*irq_preinstall)(struct msm_kms *kms);28 int (*irq_postinstall)(struct msm_kms *kms);29 void (*irq_uninstall)(struct msm_kms *kms);30 irqreturn_t (*irq)(struct msm_kms *kms);31 int (*enable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);32 void (*disable_vblank)(struct msm_kms *kms, struct drm_crtc *crtc);33 34 /*35 * Atomic commit handling:36 *37 * Note that in the case of async commits, the funcs which take38 * a crtc_mask (ie. ->flush_commit(), and ->complete_commit())39 * might not be evenly balanced with ->prepare_commit(), however40 * each crtc that effected by a ->prepare_commit() (potentially41 * multiple times) will eventually (at end of vsync period) be42 * flushed and completed.43 *44 * This has some implications about tracking of cleanup state,45 * for example SMP blocks to release after commit completes. Ie.46 * cleanup state should be also duplicated in the various47 * duplicate_state() methods, as the current cleanup state at48 * ->complete_commit() time may have accumulated cleanup work49 * from multiple commits.50 */51 52 /**53 * Enable/disable power/clks needed for hw access done in other54 * commit related methods.55 *56 * If mdp4 is migrated to runpm, we could probably drop these57 * and use runpm directly.58 */59 void (*enable_commit)(struct msm_kms *kms);60 void (*disable_commit)(struct msm_kms *kms);61 62 /**63 * Prepare for atomic commit. This is called after any previous64 * (async or otherwise) commit has completed.65 */66 void (*prepare_commit)(struct msm_kms *kms, struct drm_atomic_state *state);67 68 /**69 * Flush an atomic commit. This is called after the hardware70 * updates have already been pushed down to effected planes/71 * crtcs/encoders/connectors.72 */73 void (*flush_commit)(struct msm_kms *kms, unsigned crtc_mask);74 75 /**76 * Wait for any in-progress flush to complete on the specified77 * crtcs. This should not block if there is no in-progress78 * commit (ie. don't just wait for a vblank), as it will also79 * be called before ->prepare_commit() to ensure any potential80 * "async" commit has completed.81 */82 void (*wait_flush)(struct msm_kms *kms, unsigned crtc_mask);83 84 /**85 * Clean up after commit is completed. This is called after86 * ->wait_flush(), to give the backend a chance to do any87 * post-commit cleanup.88 */89 void (*complete_commit)(struct msm_kms *kms, unsigned crtc_mask);90 91 /*92 * Format handling:93 */94 95 /* do format checking on format modified through fb_cmd2 modifiers */96 int (*check_modified_format)(const struct msm_kms *kms,97 const struct msm_format *msm_fmt,98 const struct drm_mode_fb_cmd2 *cmd,99 struct drm_gem_object **bos);100 101 /* misc: */102 long (*round_pixclk)(struct msm_kms *kms, unsigned long rate,103 struct drm_encoder *encoder);104 /* cleanup: */105 void (*destroy)(struct msm_kms *kms);106 107 /* snapshot: */108 void (*snapshot)(struct msm_disp_state *disp_state, struct msm_kms *kms);109 110#ifdef CONFIG_DEBUG_FS111 /* debugfs: */112 int (*debugfs_init)(struct msm_kms *kms, struct drm_minor *minor);113#endif114};115 116struct msm_kms;117 118/*119 * A per-crtc timer for pending async atomic flushes. Scheduled to expire120 * shortly before vblank to flush pending async updates.121 */122struct msm_pending_timer {123 struct msm_hrtimer_work work;124 struct kthread_worker *worker;125 struct msm_kms *kms;126 unsigned crtc_idx;127};128 129struct msm_kms {130 const struct msm_kms_funcs *funcs;131 struct drm_device *dev;132 133 /* irq number to be passed on to msm_irq_install */134 int irq;135 bool irq_requested;136 137 /* mapper-id used to request GEM buffer mapped for scanout: */138 struct msm_gem_address_space *aspace;139 140 /* disp snapshot support */141 struct kthread_worker *dump_worker;142 struct kthread_work dump_work;143 struct mutex dump_mutex;144 145 /*146 * For async commit, where ->flush_commit() and later happens147 * from the crtc's pending_timer close to end of the frame:148 */149 struct mutex commit_lock[MAX_CRTCS];150 unsigned pending_crtc_mask;151 struct msm_pending_timer pending_timers[MAX_CRTCS];152};153 154static inline int msm_kms_init(struct msm_kms *kms,155 const struct msm_kms_funcs *funcs)156{157 unsigned i, ret;158 159 for (i = 0; i < ARRAY_SIZE(kms->commit_lock); i++)160 mutex_init(&kms->commit_lock[i]);161 162 kms->funcs = funcs;163 164 for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) {165 ret = msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i);166 if (ret) {167 return ret;168 }169 }170 171 return 0;172}173 174static inline void msm_kms_destroy(struct msm_kms *kms)175{176 unsigned i;177 178 for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++)179 msm_atomic_destroy_pending_timer(&kms->pending_timers[i]);180}181 182#define for_each_crtc_mask(dev, crtc, crtc_mask) \183 drm_for_each_crtc(crtc, dev) \184 for_each_if (drm_crtc_mask(crtc) & (crtc_mask))185 186#define for_each_crtc_mask_reverse(dev, crtc, crtc_mask) \187 drm_for_each_crtc_reverse(crtc, dev) \188 for_each_if (drm_crtc_mask(crtc) & (crtc_mask))189 190int msm_drm_kms_init(struct device *dev, const struct drm_driver *drv);191void msm_drm_kms_uninit(struct device *dev);192 193#endif /* __MSM_KMS_H__ */194