This is a note to let you know that I've just added the patch titled
drm/msm/dpu: add helper to get IRQ-related data
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-msm-dpu-add-helper-to-get-irq-related-data.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c213fb2f7a6a89d6edb193d43668bf12d4058de3
Author: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Date: Wed Aug 2 13:04:22 2023 +0300
drm/msm/dpu: add helper to get IRQ-related data
[ Upstream commit ea4842ed62f3556cf0a90f19d911ee03a4d0c844 ]
In preparation to reworking IRQ indices, move irq_tbl access to
a separate helper.
Reviewed-by: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/550931/
Link: https://lore.kernel.org/r/20230802100426.4184892-5-dmitry.baryshkov@xxxxxxxxxx
Stable-dep-of: 530f272053a5 ("drm/msm/dpu: Add callback function pointer check before its call")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
index 81d03b6c67d12..14d374de30c52 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
@@ -206,6 +206,12 @@ static inline bool dpu_core_irq_is_valid(struct dpu_hw_intr *intr,
return irq_idx >= 0 && irq_idx < intr->total_irqs;
}
+static inline struct dpu_hw_intr_entry *dpu_core_irq_get_entry(struct dpu_hw_intr *intr,
+ int irq_idx)
+{
+ return &intr->irq_tbl[irq_idx];
+}
+
/**
* dpu_core_irq_callback_handler - dispatch core interrupts
* @dpu_kms: Pointer to DPU's KMS structure
@@ -213,17 +219,19 @@ static inline bool dpu_core_irq_is_valid(struct dpu_hw_intr *intr,
*/
static void dpu_core_irq_callback_handler(struct dpu_kms *dpu_kms, int irq_idx)
{
+ struct dpu_hw_intr_entry *irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, irq_idx);
+
VERB("irq_idx=%d\n", irq_idx);
- if (!dpu_kms->hw_intr->irq_tbl[irq_idx].cb)
+ if (!irq_entry->cb)
DRM_ERROR("no registered cb, idx:%d\n", irq_idx);
- atomic_inc(&dpu_kms->hw_intr->irq_tbl[irq_idx].count);
+ atomic_inc(&irq_entry->count);
/*
* Perform registered function callback
*/
- dpu_kms->hw_intr->irq_tbl[irq_idx].cb(dpu_kms->hw_intr->irq_tbl[irq_idx].arg);
+ irq_entry->cb(irq_entry->arg);
}
irqreturn_t dpu_core_irq(struct msm_kms *kms)
@@ -510,6 +518,7 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
void (*irq_cb)(void *arg),
void *irq_arg)
{
+ struct dpu_hw_intr_entry *irq_entry;
unsigned long irq_flags;
int ret;
@@ -527,15 +536,16 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
spin_lock_irqsave(&dpu_kms->hw_intr->irq_lock, irq_flags);
- if (unlikely(WARN_ON(dpu_kms->hw_intr->irq_tbl[irq_idx].cb))) {
+ irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, irq_idx);
+ if (unlikely(WARN_ON(irq_entry->cb))) {
spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
return -EBUSY;
}
trace_dpu_core_irq_register_callback(irq_idx, irq_cb);
- dpu_kms->hw_intr->irq_tbl[irq_idx].arg = irq_arg;
- dpu_kms->hw_intr->irq_tbl[irq_idx].cb = irq_cb;
+ irq_entry->arg = irq_arg;
+ irq_entry->cb = irq_cb;
ret = dpu_hw_intr_enable_irq_locked(
dpu_kms->hw_intr,
@@ -552,6 +562,7 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx)
{
+ struct dpu_hw_intr_entry *irq_entry;
unsigned long irq_flags;
int ret;
@@ -570,8 +581,9 @@ int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx)
DPU_ERROR("Fail to disable IRQ for irq_idx:%d: %d\n",
irq_idx, ret);
- dpu_kms->hw_intr->irq_tbl[irq_idx].cb = NULL;
- dpu_kms->hw_intr->irq_tbl[irq_idx].arg = NULL;
+ irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, irq_idx);
+ irq_entry->cb = NULL;
+ irq_entry->arg = NULL;
spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
@@ -584,14 +596,16 @@ int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx)
static int dpu_debugfs_core_irq_show(struct seq_file *s, void *v)
{
struct dpu_kms *dpu_kms = s->private;
+ struct dpu_hw_intr_entry *irq_entry;
unsigned long irq_flags;
int i, irq_count;
void *cb;
for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
spin_lock_irqsave(&dpu_kms->hw_intr->irq_lock, irq_flags);
- irq_count = atomic_read(&dpu_kms->hw_intr->irq_tbl[i].count);
- cb = dpu_kms->hw_intr->irq_tbl[i].cb;
+ irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
+ irq_count = atomic_read(&irq_entry->count);
+ cb = irq_entry->cb;
spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
if (irq_count || cb)
@@ -614,6 +628,7 @@ void dpu_debugfs_core_irq_init(struct dpu_kms *dpu_kms,
void dpu_core_irq_preinstall(struct msm_kms *kms)
{
struct dpu_kms *dpu_kms = to_dpu_kms(kms);
+ struct dpu_hw_intr_entry *irq_entry;
int i;
pm_runtime_get_sync(&dpu_kms->pdev->dev);
@@ -621,22 +636,27 @@ void dpu_core_irq_preinstall(struct msm_kms *kms)
dpu_disable_all_irqs(dpu_kms);
pm_runtime_put_sync(&dpu_kms->pdev->dev);
- for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++)
- atomic_set(&dpu_kms->hw_intr->irq_tbl[i].count, 0);
+ for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
+ irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
+ atomic_set(&irq_entry->count, 0);
+ }
}
void dpu_core_irq_uninstall(struct msm_kms *kms)
{
struct dpu_kms *dpu_kms = to_dpu_kms(kms);
+ struct dpu_hw_intr_entry *irq_entry;
int i;
if (!dpu_kms->hw_intr)
return;
pm_runtime_get_sync(&dpu_kms->pdev->dev);
- for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++)
- if (dpu_kms->hw_intr->irq_tbl[i].cb)
+ for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
+ irq_entry = dpu_core_irq_get_entry(dpu_kms->hw_intr, i);
+ if (irq_entry->cb)
DPU_ERROR("irq_idx=%d still enabled/registered\n", i);
+ }
dpu_clear_irqs(dpu_kms);
dpu_disable_all_irqs(dpu_kms);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
index e2b00dd326193..391fb268ad903 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
@@ -38,6 +38,12 @@ enum dpu_hw_intr_reg {
#define DPU_IRQ_IDX(reg_idx, offset) (reg_idx * 32 + offset)
+struct dpu_hw_intr_entry {
+ void (*cb)(void *arg);
+ void *arg;
+ atomic_t count;
+};
+
/**
* struct dpu_hw_intr: hw interrupts handling data structure
* @hw: virtual address mapping
@@ -57,11 +63,7 @@ struct dpu_hw_intr {
unsigned long irq_mask;
const struct dpu_intr_reg *intr_set;
- struct {
- void (*cb)(void *arg);
- void *arg;
- atomic_t count;
- } irq_tbl[];
+ struct dpu_hw_intr_entry irq_tbl[];
};
/**
