diff options
Diffstat (limited to 'drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h new file mode 100644 index 000000000000..5e98bba46af5 --- /dev/null +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h @@ -0,0 +1,153 @@ +/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __DPU_CORE_IRQ_H__ +#define __DPU_CORE_IRQ_H__ + +#include "dpu_kms.h" +#include "dpu_hw_interrupts.h" + +/** + * dpu_core_irq_preinstall - perform pre-installation of core IRQ handler + * @dpu_kms: DPU handle + * @return: none + */ +void dpu_core_irq_preinstall(struct dpu_kms *dpu_kms); + +/** + * dpu_core_irq_postinstall - perform post-installation of core IRQ handler + * @dpu_kms: DPU handle + * @return: 0 if success; error code otherwise + */ +int dpu_core_irq_postinstall(struct dpu_kms *dpu_kms); + +/** + * dpu_core_irq_uninstall - uninstall core IRQ handler + * @dpu_kms: DPU handle + * @return: none + */ +void dpu_core_irq_uninstall(struct dpu_kms *dpu_kms); + +/** + * dpu_core_irq - core IRQ handler + * @dpu_kms: DPU handle + * @return: interrupt handling status + */ +irqreturn_t dpu_core_irq(struct dpu_kms *dpu_kms); + +/** + * dpu_core_irq_idx_lookup - IRQ helper function for lookup irq_idx from HW + * interrupt mapping table. + * @dpu_kms: DPU handle + * @intr_type: DPU HW interrupt type for lookup + * @instance_idx: DPU HW block instance defined in dpu_hw_mdss.h + * @return: irq_idx or -EINVAL when fail to lookup + */ +int dpu_core_irq_idx_lookup( + struct dpu_kms *dpu_kms, + enum dpu_intr_type intr_type, + uint32_t instance_idx); + +/** + * dpu_core_irq_enable - IRQ helper function for enabling one or more IRQs + * @dpu_kms: DPU handle + * @irq_idxs: Array of irq index + * @irq_count: Number of irq_idx provided in the array + * @return: 0 for success enabling IRQ, otherwise failure + * + * This function increments count on each enable and decrements on each + * disable. Interrupts is enabled if count is 0 before increment. + */ +int dpu_core_irq_enable( + struct dpu_kms *dpu_kms, + int *irq_idxs, + uint32_t irq_count); + +/** + * dpu_core_irq_disable - IRQ helper function for disabling one of more IRQs + * @dpu_kms: DPU handle + * @irq_idxs: Array of irq index + * @irq_count: Number of irq_idx provided in the array + * @return: 0 for success disabling IRQ, otherwise failure + * + * This function increments count on each enable and decrements on each + * disable. Interrupts is disabled if count is 0 after decrement. + */ +int dpu_core_irq_disable( + struct dpu_kms *dpu_kms, + int *irq_idxs, + uint32_t irq_count); + +/** + * dpu_core_irq_read - IRQ helper function for reading IRQ status + * @dpu_kms: DPU handle + * @irq_idx: irq index + * @clear: True to clear the irq after read + * @return: non-zero if irq detected; otherwise no irq detected + */ +u32 dpu_core_irq_read( + struct dpu_kms *dpu_kms, + int irq_idx, + bool clear); + +/** + * dpu_core_irq_register_callback - For registering callback function on IRQ + * interrupt + * @dpu_kms: DPU handle + * @irq_idx: irq index + * @irq_cb: IRQ callback structure, containing callback function + * and argument. Passing NULL for irq_cb will unregister + * the callback for the given irq_idx + * This must exist until un-registration. + * @return: 0 for success registering callback, otherwise failure + * + * This function supports registration of multiple callbacks for each interrupt. + */ +int dpu_core_irq_register_callback( + struct dpu_kms *dpu_kms, + int irq_idx, + struct dpu_irq_callback *irq_cb); + +/** + * dpu_core_irq_unregister_callback - For unregistering callback function on IRQ + * interrupt + * @dpu_kms: DPU handle + * @irq_idx: irq index + * @irq_cb: IRQ callback structure, containing callback function + * and argument. Passing NULL for irq_cb will unregister + * the callback for the given irq_idx + * This must match with registration. + * @return: 0 for success registering callback, otherwise failure + * + * This function supports registration of multiple callbacks for each interrupt. + */ +int dpu_core_irq_unregister_callback( + struct dpu_kms *dpu_kms, + int irq_idx, + struct dpu_irq_callback *irq_cb); + +/** + * dpu_debugfs_core_irq_init - register core irq debugfs + * @dpu_kms: pointer to kms + * @parent: debugfs directory root + * @Return: 0 on success + */ +int dpu_debugfs_core_irq_init(struct dpu_kms *dpu_kms, + struct dentry *parent); + +/** + * dpu_debugfs_core_irq_destroy - deregister core irq debugfs + * @dpu_kms: pointer to kms + */ +void dpu_debugfs_core_irq_destroy(struct dpu_kms *dpu_kms); + +#endif /* __DPU_CORE_IRQ_H__ */ |