drivers/gpu/drm/msm/disp/mdp5/mdp5_irq.c
Source file repositories/reference/linux-study-clean/drivers/gpu/drm/msm/disp/mdp5/mdp5_irq.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/gpu/drm/msm/disp/mdp5/mdp5_irq.c- Extension
.c- Size
- 3266 bytes
- Lines
- 124
- Domain
- Driver Families
- Bucket
- drivers/gpu
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Touches IRQ or DMA behavior; this matters for the representative real-device path.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/irq.hdrm/drm_print.hdrm/drm_vblank.hmsm_drv.hmdp5_kms.h
Detected Declarations
function Copyrightfunction mdp5_irq_error_handlerfunction mdp5_irq_preinstallfunction mdp5_irq_postinstallfunction mdp5_irq_uninstallfunction mdp5_irqfunction mdp5_enable_vblankfunction mdp5_disable_vblank
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <linux/irq.h>
#include <drm/drm_print.h>
#include <drm/drm_vblank.h>
#include "msm_drv.h"
#include "mdp5_kms.h"
void mdp5_set_irqmask(struct mdp_kms *mdp_kms, uint32_t irqmask,
uint32_t old_irqmask)
{
mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_CLEAR,
irqmask ^ (irqmask & old_irqmask));
mdp5_write(to_mdp5_kms(mdp_kms), REG_MDP5_INTR_EN, irqmask);
}
static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
{
struct mdp5_kms *mdp5_kms = container_of(irq, struct mdp5_kms, error_handler);
static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
extern bool dumpstate;
DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
if (dumpstate && __ratelimit(&rs)) {
struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
drm_state_dump(mdp5_kms->dev, &p);
}
}
void mdp5_irq_preinstall(struct msm_kms *kms)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
struct device *dev = &mdp5_kms->pdev->dev;
pm_runtime_get_sync(dev);
mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, 0xffffffff);
mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
pm_runtime_put_sync(dev);
}
int mdp5_irq_postinstall(struct msm_kms *kms)
{
struct mdp_kms *mdp_kms = to_mdp_kms(kms);
struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
struct device *dev = &mdp5_kms->pdev->dev;
struct mdp_irq *error_handler = &mdp5_kms->error_handler;
error_handler->irq = mdp5_irq_error_handler;
error_handler->irqmask = MDP5_IRQ_INTF0_UNDER_RUN |
MDP5_IRQ_INTF1_UNDER_RUN |
MDP5_IRQ_INTF2_UNDER_RUN |
MDP5_IRQ_INTF3_UNDER_RUN;
pm_runtime_get_sync(dev);
mdp_irq_register(mdp_kms, error_handler);
pm_runtime_put_sync(dev);
return 0;
}
void mdp5_irq_uninstall(struct msm_kms *kms)
{
struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
struct device *dev = &mdp5_kms->pdev->dev;
pm_runtime_get_sync(dev);
mdp5_write(mdp5_kms, REG_MDP5_INTR_EN, 0x00000000);
pm_runtime_put_sync(dev);
}
irqreturn_t mdp5_irq(struct msm_kms *kms)
{
struct mdp_kms *mdp_kms = to_mdp_kms(kms);
struct mdp5_kms *mdp5_kms = to_mdp5_kms(mdp_kms);
struct drm_device *dev = mdp5_kms->dev;
struct drm_crtc *crtc;
uint32_t status, enable;
enable = mdp5_read(mdp5_kms, REG_MDP5_INTR_EN);
status = mdp5_read(mdp5_kms, REG_MDP5_INTR_STATUS) & enable;
mdp5_write(mdp5_kms, REG_MDP5_INTR_CLEAR, status);
VERB("status=%08x", status);
Annotation
- Immediate include surface: `linux/irq.h`, `drm/drm_print.h`, `drm/drm_vblank.h`, `msm_drv.h`, `mdp5_kms.h`.
- Detected declarations: `function Copyright`, `function mdp5_irq_error_handler`, `function mdp5_irq_preinstall`, `function mdp5_irq_postinstall`, `function mdp5_irq_uninstall`, `function mdp5_irq`, `function mdp5_enable_vblank`, `function mdp5_disable_vblank`.
- Atlas domain: Driver Families / drivers/gpu.
- Implementation status: source implementation candidate.
- IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.