diff options
Diffstat (limited to 'drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c')
-rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c deleted file mode 100644 index 819b26e660b9..000000000000 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_blk.c +++ /dev/null @@ -1,139 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. - */ - -#define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ - -#include <linux/mutex.h> -#include <linux/errno.h> -#include <linux/slab.h> - -#include "dpu_hw_mdss.h" -#include "dpu_hw_blk.h" - -/* Serialization lock for dpu_hw_blk_list */ -static DEFINE_MUTEX(dpu_hw_blk_lock); - -/* List of all hw block objects */ -static LIST_HEAD(dpu_hw_blk_list); - -/** - * dpu_hw_blk_init - initialize hw block object - * @hw_blk: pointer to hw block object - * @type: hw block type - enum dpu_hw_blk_type - * @id: instance id of the hw block - * @ops: Pointer to block operations - */ -void dpu_hw_blk_init(struct dpu_hw_blk *hw_blk, u32 type, int id, - struct dpu_hw_blk_ops *ops) -{ - INIT_LIST_HEAD(&hw_blk->list); - hw_blk->type = type; - hw_blk->id = id; - atomic_set(&hw_blk->refcount, 0); - - if (ops) - hw_blk->ops = *ops; - - mutex_lock(&dpu_hw_blk_lock); - list_add(&hw_blk->list, &dpu_hw_blk_list); - mutex_unlock(&dpu_hw_blk_lock); -} - -/** - * dpu_hw_blk_destroy - destroy hw block object. - * @hw_blk: pointer to hw block object - * return: none - */ -void dpu_hw_blk_destroy(struct dpu_hw_blk *hw_blk) -{ - if (!hw_blk) { - pr_err("invalid parameters\n"); - return; - } - - if (atomic_read(&hw_blk->refcount)) - pr_err("hw_blk:%d.%d invalid refcount\n", hw_blk->type, - hw_blk->id); - - mutex_lock(&dpu_hw_blk_lock); - list_del(&hw_blk->list); - mutex_unlock(&dpu_hw_blk_lock); -} - -/** - * dpu_hw_blk_get - get hw_blk from free pool - * @hw_blk: if specified, increment reference count only - * @type: if hw_blk is not specified, allocate the next available of this type - * @id: if specified (>= 0), allocate the given instance of the above type - * return: pointer to hw block object - */ -struct dpu_hw_blk *dpu_hw_blk_get(struct dpu_hw_blk *hw_blk, u32 type, int id) -{ - struct dpu_hw_blk *curr; - int rc, refcount; - - if (!hw_blk) { - mutex_lock(&dpu_hw_blk_lock); - list_for_each_entry(curr, &dpu_hw_blk_list, list) { - if ((curr->type != type) || - (id >= 0 && curr->id != id) || - (id < 0 && - atomic_read(&curr->refcount))) - continue; - - hw_blk = curr; - break; - } - mutex_unlock(&dpu_hw_blk_lock); - } - - if (!hw_blk) { - pr_debug("no hw_blk:%d\n", type); - return NULL; - } - - refcount = atomic_inc_return(&hw_blk->refcount); - - if (refcount == 1 && hw_blk->ops.start) { - rc = hw_blk->ops.start(hw_blk); - if (rc) { - pr_err("failed to start hw_blk:%d rc:%d\n", type, rc); - goto error_start; - } - } - - pr_debug("hw_blk:%d.%d refcount:%d\n", hw_blk->type, - hw_blk->id, refcount); - return hw_blk; - -error_start: - dpu_hw_blk_put(hw_blk); - return ERR_PTR(rc); -} - -/** - * dpu_hw_blk_put - put hw_blk to free pool if decremented refcount is zero - * @hw_blk: hw block to be freed - */ -void dpu_hw_blk_put(struct dpu_hw_blk *hw_blk) -{ - if (!hw_blk) { - pr_err("invalid parameters\n"); - return; - } - - pr_debug("hw_blk:%d.%d refcount:%d\n", hw_blk->type, hw_blk->id, - atomic_read(&hw_blk->refcount)); - - if (!atomic_read(&hw_blk->refcount)) { - pr_err("hw_blk:%d.%d invalid put\n", hw_blk->type, hw_blk->id); - return; - } - - if (atomic_dec_return(&hw_blk->refcount)) - return; - - if (hw_blk->ops.stop) - hw_blk->ops.stop(hw_blk); -} |