/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved. * Copyright (c) 2015-2018 The Linux Foundation. All rights reserved.
*/
/* wait for at most 2 vsync for lowest refresh rate (24hz) */ #define KICKOFF_TIMEOUT_MS 84 #define KICKOFF_TIMEOUT_JIFFIES msecs_to_jiffies(KICKOFF_TIMEOUT_MS)
/** * enum dpu_enc_split_role - Role this physical encoder will play in a * split-panel configuration, where one panel is master, and others slaves. * Masters have extra responsibilities, like managing the VBLANK IRQ. * @ENC_ROLE_SOLO: This is the one and only panel. This encoder is master. * @ENC_ROLE_MASTER: This encoder is the master of a split panel config. * @ENC_ROLE_SLAVE: This encoder is not the master of a split panel config.
*/ enum dpu_enc_split_role {
ENC_ROLE_SOLO,
ENC_ROLE_MASTER,
ENC_ROLE_SLAVE,
};
/** * enum dpu_enc_enable_state - current enabled state of the physical encoder * @DPU_ENC_DISABLING: Encoder transitioning to disable state * Events bounding transition are encoder type specific * @DPU_ENC_DISABLED: Encoder is disabled * @DPU_ENC_ENABLING: Encoder transitioning to enabled * Events bounding transition are encoder type specific * @DPU_ENC_ENABLED: Encoder is enabled * @DPU_ENC_ERR_NEEDS_HW_RESET: Encoder is enabled, but requires a hw_reset * to recover from a previous error
*/ enum dpu_enc_enable_state {
DPU_ENC_DISABLING,
DPU_ENC_DISABLED,
DPU_ENC_ENABLING,
DPU_ENC_ENABLED,
DPU_ENC_ERR_NEEDS_HW_RESET
};
struct dpu_encoder_phys;
/** * struct dpu_encoder_phys_ops - Interface the physical encoders provide to * the containing virtual encoder. * @prepare_commit: MSM Atomic Call, start of atomic commit sequence * @is_master: Whether this phys_enc is the current master * encoder. Can be switched at enable time. Based * on split_role and current mode (CMD/VID). * @atomic_mode_set: DRM Call. Set a DRM mode. * This likely caches the mode, for use at enable. * @enable: DRM Call. Enable a DRM mode. * @disable: DRM Call. Disable mode. * @control_vblank_irq Register/Deregister for VBLANK IRQ * @wait_for_commit_done: Wait for hardware to have flushed the * current pending frames to hardware * @wait_for_tx_complete: Wait for hardware to transfer the pixels * to the panel * @wait_for_vblank: Wait for VBLANK, for sub-driver internal use * @prepare_for_kickoff: Do any work necessary prior to a kickoff * For CMD encoder, may wait for previous tx done * @handle_post_kickoff: Do any work necessary post-kickoff work * @trigger_start: Process start event on physical encoder * @needs_single_flush: Whether encoder slaves need to be flushed * @irq_enable: Handler to enable all the encoder IRQs * @irq_disable: Handler to disable all the encoder IRQs * @prepare_idle_pc: phys encoder can update the vsync_enable status * on idle power collapse prepare * @restore: Restore all the encoder configs. * @get_line_count: Obtain current vertical line count
*/
/** * enum dpu_intr_idx - dpu encoder interrupt index * @INTR_IDX_VSYNC: Vsync interrupt for video mode panel * @INTR_IDX_PINGPONG: Pingpong done interrupt for cmd mode panel * @INTR_IDX_UNDERRUN: Underrun interrupt for video and cmd mode panel * @INTR_IDX_RDPTR: Readpointer done interrupt for cmd mode panel * @INTR_IDX_WB_DONE: Writeback done interrupt for virtual connector
*/ enum dpu_intr_idx {
INTR_IDX_VSYNC,
INTR_IDX_PINGPONG,
INTR_IDX_UNDERRUN,
INTR_IDX_CTL_START,
INTR_IDX_RDPTR,
INTR_IDX_WB_DONE,
INTR_IDX_MAX,
};
/** * struct dpu_encoder_phys - physical encoder that drives a single INTF block * tied to a specific panel / sub-panel. Abstract type, sub-classed by * phys_vid or phys_cmd for video mode or command mode encs respectively. * @parent: Pointer to the containing virtual encoder * @ops: Operations exposed to the virtual encoder * @parent_ops: Callbacks exposed by the parent to the phys_enc * @hw_mdptop: Hardware interface to the top registers * @hw_ctl: Hardware interface to the ctl registers * @hw_pp: Hardware interface to the ping pong registers * @hw_intf: Hardware interface to the intf registers * @hw_wb: Hardware interface to the wb registers * @hw_cdm: Hardware interface to the CDM registers * @dpu_kms: Pointer to the dpu_kms top level * @cdm_cfg: CDM block config needed to store WB/DP block's CDM configuration * @cached_mode: DRM mode cached at mode_set time, acted on in enable * @vblank_ctl_lock: Vblank ctl mutex lock to protect vblank_refcount * @enabled: Whether the encoder has enabled and running a mode * @split_role: Role to play in a split-panel configuration * @intf_mode: Interface mode * @enc_spinlock: Virtual-Encoder-Wide Spin Lock for IRQ purposes * @enable_state: Enable state tracking * @vblank_refcount: Reference count of vblank request * @vsync_cnt: Vsync count for the physical encoder * @underrun_cnt: Underrun count for the physical encoder * @pending_kickoff_cnt: Atomic counter tracking the number of kickoffs * vs. the number of done/vblank irqs. Should hover * between 0-2 Incremented when a new kickoff is * scheduled. Decremented in irq handler * @pending_ctlstart_cnt: Atomic counter tracking the number of ctl start * pending. * @pending_kickoff_wq: Wait queue for blocking until kickoff completes * @irq: IRQ indices * @has_intf_te: Interface TE configuration support
*/ struct dpu_encoder_phys { struct drm_encoder *parent; struct dpu_encoder_phys_ops ops; struct dpu_hw_mdp *hw_mdptop; struct dpu_hw_ctl *hw_ctl; struct dpu_hw_pingpong *hw_pp; struct dpu_hw_intf *hw_intf; struct dpu_hw_wb *hw_wb; struct dpu_hw_cdm *hw_cdm; struct dpu_kms *dpu_kms; struct dpu_hw_cdm_cfg cdm_cfg; struct drm_display_mode cached_mode; struct mutex vblank_ctl_lock; enum dpu_enc_split_role split_role; enum dpu_intf_mode intf_mode;
spinlock_t *enc_spinlock; enum dpu_enc_enable_state enable_state; int vblank_refcount;
atomic_t vsync_cnt;
atomic_t underrun_cnt;
atomic_t pending_ctlstart_cnt;
atomic_t pending_kickoff_cnt;
wait_queue_head_t pending_kickoff_wq; unsignedint irq[INTR_IDX_MAX]; bool has_intf_te;
};
/** * struct dpu_encoder_phys_wb - sub-class of dpu_encoder_phys to handle command * mode specific operations * @base: Baseclass physical encoder structure * @wbirq_refcount: Reference count of writeback interrupt * @wb_done_timeout_cnt: number of wb done irq timeout errors * @wb_cfg: writeback block config to store fb related details * @wb_conn: backpointer to writeback connector * @wb_job: backpointer to current writeback job * @dest: dpu buffer layout for current writeback output buffer
*/ struct dpu_encoder_phys_wb { struct dpu_encoder_phys base;
atomic_t wbirq_refcount; int wb_done_timeout_cnt; struct dpu_hw_wb_cfg wb_cfg; struct drm_writeback_connector *wb_conn; struct drm_writeback_job *wb_job; struct dpu_hw_fmt_layout dest;
};
/** * struct dpu_encoder_phys_cmd - sub-class of dpu_encoder_phys to handle command * mode specific operations * @base: Baseclass physical encoder structure * @intf_idx: Intf Block index used by this phys encoder * @stream_sel: Stream selection for multi-stream interfaces * @serialize_wait4pp: serialize wait4pp feature waits for pp_done interrupt * after ctl_start instead of before next frame kickoff * @pp_timeout_report_cnt: number of pingpong done irq timeout errors * @pending_vblank_cnt: Atomic counter tracking pending wait for VBLANK * @pending_vblank_wq: Wait queue for blocking until VBLANK received
*/ struct dpu_encoder_phys_cmd { struct dpu_encoder_phys base; int stream_sel; bool serialize_wait4pp; int pp_timeout_report_cnt;
atomic_t pending_vblank_cnt;
wait_queue_head_t pending_vblank_wq;
};
/** * struct dpu_enc_phys_init_params - initialization parameters for phys encs * @dpu_kms: Pointer to the dpu_kms top level * @parent: Pointer to the containing virtual encoder * @parent_ops: Callbacks exposed by the parent to the phys_enc * @split_role: Role to play in a split-panel configuration * @hw_intf: Hardware interface to the intf registers * @hw_wb: Hardware interface to the wb registers * @enc_spinlock: Virtual-Encoder-Wide Spin Lock for IRQ purposes
*/ struct dpu_enc_phys_init_params { struct dpu_kms *dpu_kms; struct drm_encoder *parent; enum dpu_enc_split_role split_role; struct dpu_hw_intf *hw_intf; struct dpu_hw_wb *hw_wb;
spinlock_t *enc_spinlock;
};
/** * dpu_encoder_wait_info - container for passing arguments to irq wait functions * @wq: wait queue structure * @atomic_cnt: wait until atomic_cnt equals zero * @timeout_ms: timeout value in milliseconds
*/ struct dpu_encoder_wait_info {
wait_queue_head_t *wq;
atomic_t *atomic_cnt;
s64 timeout_ms;
};
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