linux/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2014, The Linux Foundation. All rights reserved.
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <[email protected]>
 */

#include <drm/drm_fourcc.h>
#include <drm/drm_util.h>

#include "mdp5_kms.h"
#include "mdp5_smp.h"


struct mdp5_smp { … };

static inline
struct mdp5_kms *get_kms(struct mdp5_smp *smp)
{ … }

static inline u32 pipe2client(enum mdp5_pipe pipe, int plane)
{ … }

/* allocate blocks for the specified request: */
static int smp_request_block(struct mdp5_smp *smp,
		struct mdp5_smp_state *state,
		u32 cid, int nblks)
{ … }

static void set_fifo_thresholds(struct mdp5_smp *smp,
		enum mdp5_pipe pipe, int nblks)
{ … }

/*
 * NOTE: looks like if horizontal decimation is used (if we supported that)
 * then the width used to calculate SMP block requirements is the post-
 * decimated width.  Ie. SMP buffering sits downstream of decimation (which
 * presumably happens during the dma from scanout buffer).
 */
uint32_t mdp5_smp_calculate(struct mdp5_smp *smp,
		const struct msm_format *format,
		u32 width, bool hdecim)
{ … }

int mdp5_smp_assign(struct mdp5_smp *smp, struct mdp5_smp_state *state,
		enum mdp5_pipe pipe, uint32_t blkcfg)
{ … }

/* Release SMP blocks for all clients of the pipe */
void mdp5_smp_release(struct mdp5_smp *smp, struct mdp5_smp_state *state,
		enum mdp5_pipe pipe)
{ … }

/* NOTE: SMP_ALLOC_* regs are *not* double buffered, so release has to
 * happen after scanout completes.
 */
static unsigned update_smp_state(struct mdp5_smp *smp,
		u32 cid, mdp5_smp_state_t *assigned)
{ … }

static void write_smp_alloc_regs(struct mdp5_smp *smp)
{ … }

static void write_smp_fifo_regs(struct mdp5_smp *smp)
{ … }

void mdp5_smp_prepare_commit(struct mdp5_smp *smp, struct mdp5_smp_state *state)
{ … }

void mdp5_smp_complete_commit(struct mdp5_smp *smp, struct mdp5_smp_state *state)
{ … }

void mdp5_smp_dump(struct mdp5_smp *smp, struct drm_printer *p,
		   struct mdp5_global_state *global_state)
{ … }


struct mdp5_smp *mdp5_smp_init(struct mdp5_kms *mdp5_kms, const struct mdp5_smp_block *cfg)
{ … }