[Freedreno] [PATCH v2 4/7] drm/msm/dpu: allow just single IRQ callback
Dmitry Baryshkov
dmitry.baryshkov at linaro.org
Tue Feb 1 04:02:29 UTC 2022
On 19/01/2022 03:10, abhinavk at codeaurora.org wrote:
> <replying from my older email as i couldnt find this thread on my new one>
>
> On 2021-08-17 20:30, abhinavk at codeaurora.org wrote:
>> On 2021-06-17 15:20, Dmitry Baryshkov wrote:
>>> DPU interrupts code allows multiple callbacks per interrut. In reality
>> /interrupt
>>> none of the interrupts is shared between blocks (and will probably never
>>> be). Drop support for registering multiple callbacks per interrupt to
>>> simplify interrupt handling code.
>>>
>>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
>>
>> I need to check on why we had this design originally and we still do.
>> the idx with which we are registering today can generate only one hw
>> interrupt.
>> But i am not sure if something for planned for future use. Will update
>> in a day or two.
>>
>> meanwhile some comments and questions below.
>
> I did check internally on the original design of this and yes the plan
> was for other
> sub-modules to register for callbacks and that callback goes into the
> callback list.
>
> For example, lets say for some reason some other modules like the DSI
> want to register
> for the VSYNC interrupt, it can register for a callback and that will
> get added to the
> callback list.
>
> But, this never got used that way and even now there is only one
> callback per interrupt.
> We dont have a concrete use-case where we will need this in the future
> but like many other things,
> we cannot tell for certain.
>
> Since there is no concrete use-case where we might need this, if you
> would like to go ahead
> with this, please do.
>
> Once you address the other comments on this, I can ack this.
Thanks for the info. I'll respin this on top of current msm-next +
https://patchwork.freedesktop.org/patch/464350/
>
>>
>>> ---
>>> drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h | 18 +--
>>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 6 +-
>>> .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 2 +-
>>> .../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 10 +-
>>> .../drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 6 +-
>>> .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c | 144 +++++++-----------
>>> .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h | 12 +-
>>> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h | 12 --
>>> drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h | 10 +-
>>> 9 files changed, 86 insertions(+), 134 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
>>> index 90ae6c9ccc95..44ab97fb2964 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h
>>> @@ -46,10 +46,8 @@ u32 dpu_core_irq_read(
>>> * 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.
>>> + * @irq_cb: IRQ callback funcion.
>>> + * @irq_arg: IRQ callback argument.
>>> * @return: 0 for success registering callback, otherwise
>>> failure
>>> *
>>> * This function supports registration of multiple callbacks for each
>>> interrupt.
>>> @@ -57,17 +55,16 @@ u32 dpu_core_irq_read(
>>> int dpu_core_irq_register_callback(
>>> struct dpu_kms *dpu_kms,
>>> int irq_idx,
>>> - struct dpu_irq_callback *irq_cb);
>>> + void (*irq_cb)(void *arg, int irq_idx),
>>> + void *irq_arg);
>>>
>>> /**
>>> * 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.
>>> + * @irq_cb: IRQ callback funcion.
>> /function
>> this typo is there in multiple places
>>> + * @irq_arg: IRQ callback argument.
>>> * @return: 0 for success registering callback, otherwise
>>> failure
>>> *
>>> * This function supports registration of multiple callbacks for each
>>> interrupt.
>>> @@ -75,7 +72,8 @@ int dpu_core_irq_register_callback(
>>> int dpu_core_irq_unregister_callback(
>>> struct dpu_kms *dpu_kms,
>>> int irq_idx,
>>> - struct dpu_irq_callback *irq_cb);
>>> + void (*irq_cb)(void *arg, int irq_idx),
>>> + void *irq_arg);
>>>
>>> /**
>>> * dpu_debugfs_core_irq_init - register core irq debugfs
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>>> index 1c04b7cce43e..d3557b0f4db9 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>>> @@ -310,7 +310,7 @@ int dpu_encoder_helper_wait_for_irq(struct
>>> dpu_encoder_phys *phys_enc,
>>> phys_enc->hw_pp->idx - PINGPONG_0,
>>> atomic_read(wait_info->atomic_cnt));
>>> local_irq_save(flags);
>>> - irq->cb.func(phys_enc, irq->irq_idx);
>>> + irq->func(phys_enc, irq->irq_idx);
>>> local_irq_restore(flags);
>>> ret = 0;
>>> } else {
>>> @@ -352,7 +352,7 @@ int dpu_encoder_helper_register_irq(struct
>>> dpu_encoder_phys *phys_enc,
>>> }
>>>
>>> ret = dpu_core_irq_register_callback(phys_enc->dpu_kms,
>>> irq->irq_idx,
>>> - &irq->cb);
>>> + irq->func, phys_enc);
>>> if (ret) {
>>> DPU_ERROR_PHYS(phys_enc,
>>> "failed to register IRQ callback for %s\n",
>>> @@ -384,7 +384,7 @@ int dpu_encoder_helper_unregister_irq(struct
>>> dpu_encoder_phys *phys_enc,
>>> }
>>>
>>> ret = dpu_core_irq_unregister_callback(phys_enc->dpu_kms,
>>> irq->irq_idx,
>>> - &irq->cb);
>>> + irq->func, phys_enc);
>>> if (ret) {
>>> DRM_ERROR("unreg cb fail id=%u, intr=%d, irq=%d ret=%d",
>>> DRMID(phys_enc->parent), intr_idx,
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
>>> index e7270eb6b84b..80d87871fd94 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
>>> @@ -174,7 +174,7 @@ struct dpu_encoder_irq {
>>> const char *name;
>>> enum dpu_intr_idx intr_idx;
>>> int irq_idx;
>>> - struct dpu_irq_callback cb;
>>> + void (*func)(void *arg, int irq_idx);
>>> };
>>>
>>> /**
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>>> index aa01698d6b25..f921a5c99456 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
>>> @@ -782,30 +782,28 @@ struct dpu_encoder_phys
>>> *dpu_encoder_phys_cmd_init(
>>> phys_enc->enable_state = DPU_ENC_DISABLED;
>>> for (i = 0; i < INTR_IDX_MAX; i++) {
>>> irq = &phys_enc->irq[i];
>>> - INIT_LIST_HEAD(&irq->cb.list);
>>> irq->irq_idx = -EINVAL;
>>> - irq->cb.arg = phys_enc;
>>> }
>>>
>>> irq = &phys_enc->irq[INTR_IDX_CTL_START];
>>> irq->name = "ctl_start";
>>> irq->intr_idx = INTR_IDX_CTL_START;
>>> - irq->cb.func = dpu_encoder_phys_cmd_ctl_start_irq;
>>> + irq->func = dpu_encoder_phys_cmd_ctl_start_irq;
>>>
>>> irq = &phys_enc->irq[INTR_IDX_PINGPONG];
>>> irq->name = "pp_done";
>>> irq->intr_idx = INTR_IDX_PINGPONG;
>>> - irq->cb.func = dpu_encoder_phys_cmd_pp_tx_done_irq;
>>> + irq->func = dpu_encoder_phys_cmd_pp_tx_done_irq;
>>>
>>> irq = &phys_enc->irq[INTR_IDX_RDPTR];
>>> irq->name = "pp_rd_ptr";
>>> irq->intr_idx = INTR_IDX_RDPTR;
>>> - irq->cb.func = dpu_encoder_phys_cmd_pp_rd_ptr_irq;
>>> + irq->func = dpu_encoder_phys_cmd_pp_rd_ptr_irq;
>>>
>>> irq = &phys_enc->irq[INTR_IDX_UNDERRUN];
>>> irq->name = "underrun";
>>> irq->intr_idx = INTR_IDX_UNDERRUN;
>>> - irq->cb.func = dpu_encoder_phys_cmd_underrun_irq;
>>> + irq->func = dpu_encoder_phys_cmd_underrun_irq;
>>>
>>> atomic_set(&phys_enc->vblank_refcount, 0);
>>> atomic_set(&phys_enc->pending_kickoff_cnt, 0);
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
>>> index 185379b18572..437af231d6a4 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
>>> @@ -725,20 +725,18 @@ struct dpu_encoder_phys
>>> *dpu_encoder_phys_vid_init(
>>> phys_enc->enc_spinlock = p->enc_spinlock;
>>> for (i = 0; i < INTR_IDX_MAX; i++) {
>>> irq = &phys_enc->irq[i];
>>> - INIT_LIST_HEAD(&irq->cb.list);
>>> irq->irq_idx = -EINVAL;
>>> - irq->cb.arg = phys_enc;
>>> }
>>>
>>> irq = &phys_enc->irq[INTR_IDX_VSYNC];
>>> irq->name = "vsync_irq";
>>> irq->intr_idx = INTR_IDX_VSYNC;
>>> - irq->cb.func = dpu_encoder_phys_vid_vblank_irq;
>>> + irq->func = dpu_encoder_phys_vid_vblank_irq;
>>>
>>> irq = &phys_enc->irq[INTR_IDX_UNDERRUN];
>>> irq->name = "underrun";
>>> irq->intr_idx = INTR_IDX_UNDERRUN;
>>> - irq->cb.func = dpu_encoder_phys_vid_underrun_irq;
>>> + irq->func = dpu_encoder_phys_vid_underrun_irq;
>>>
>>> atomic_set(&phys_enc->vblank_refcount, 0);
>>> atomic_set(&phys_enc->pending_kickoff_cnt, 0);
>>> 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 d2b6dca487e3..7062e7f0e860 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
>>> @@ -127,21 +127,17 @@ static const struct dpu_intr_reg dpu_intr_set[]
>>> = {
>>> */
>>> static void dpu_core_irq_callback_handler(struct dpu_kms *dpu_kms,
>>> int irq_idx)
>>> {
>>> - struct dpu_irq_callback *cb;
>>> -
>>> VERB("irq_idx=%d\n", irq_idx);
>>>
>>> - if (list_empty(&dpu_kms->hw_intr->irq_cb_tbl[irq_idx]))
>>> + if (!dpu_kms->hw_intr->irq_tbl[irq_idx].cb)
>>> DRM_ERROR("no registered cb, idx:%d\n", irq_idx);
>>>
>>> - atomic_inc(&dpu_kms->hw_intr->irq_counts[irq_idx]);
>>> + atomic_inc(&dpu_kms->hw_intr->irq_tbl[irq_idx].count);
>>>
>>> /*
>>> * Perform registered function callback
>>> */
>>> - list_for_each_entry(cb, &dpu_kms->hw_intr->irq_cb_tbl[irq_idx],
>>> list)
>>> - if (cb->func)
>>> - cb->func(cb->arg, irq_idx);
>>> +
>>> dpu_kms->hw_intr->irq_tbl[irq_idx].cb(dpu_kms->hw_intr->irq_tbl[irq_idx].arg,
>>>
>>> irq_idx);
>>> }
>>>
>>> irqreturn_t dpu_core_irq(struct dpu_kms *dpu_kms)
>>> @@ -389,24 +385,18 @@ struct dpu_hw_intr *dpu_hw_intr_init(void
>>> __iomem *addr,
>>> struct dpu_mdss_cfg *m)
>>> {
>>> struct dpu_hw_intr *intr;
>>> + int nirq = MDP_INTR_MAX * 32;
>>>
>>> if (!addr || !m)
>>> return ERR_PTR(-EINVAL);
>>>
>>> - intr = kzalloc(sizeof(*intr), GFP_KERNEL);
>>> + intr = kzalloc(struct_size(intr, irq_tbl, nirq), GFP_KERNEL);
>>> if (!intr)
>>> return ERR_PTR(-ENOMEM);
>>>
>>> __intr_offset(m, addr, &intr->hw);
>>>
>>> - intr->total_irqs = ARRAY_SIZE(dpu_intr_set) * 32;
>>> -
>>> - intr->cache_irq_mask = kcalloc(ARRAY_SIZE(dpu_intr_set),
>>> sizeof(u32),
>>> - GFP_KERNEL);
>>> - if (intr->cache_irq_mask == NULL) {
>>> - kfree(intr);
>>> - return ERR_PTR(-ENOMEM);
>>> - }
>>> + intr->total_irqs = nirq;
>>>
>>> intr->irq_mask = m->mdss_irqs;
>>>
>>> @@ -417,31 +407,19 @@ struct dpu_hw_intr *dpu_hw_intr_init(void
>>> __iomem *addr,
>>>
>>> void dpu_hw_intr_destroy(struct dpu_hw_intr *intr)
>>> {
>>> - if (intr) {
>>> - kfree(intr->cache_irq_mask);
>>> -
>>> - kfree(intr->irq_cb_tbl);
>>> - kfree(intr->irq_counts);
>>> -
>>> + if (intr)
>>> kfree(intr);
>>> - }
>>> }
>>>
>>> int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int
>>> irq_idx,
>>> - struct dpu_irq_callback *register_irq_cb)
>>> + void (*irq_cb)(void *arg, int irq_idx),
>>> + void *irq_arg)
>>> {
>>> unsigned long irq_flags;
>>> + int ret;
>>>
>>> - if (!dpu_kms->hw_intr->irq_cb_tbl) {
>>> - DPU_ERROR("invalid params\n");
>>> - return -EINVAL;
>>> - }
>>> -
>>> - if (!register_irq_cb || !register_irq_cb->func) {
>>> - DPU_ERROR("invalid irq_cb:%d func:%d\n",
>>> - register_irq_cb != NULL,
>>> - register_irq_cb ?
>>> - register_irq_cb->func != NULL : -1);
>>> + if (!irq_cb) {
>>> + DPU_ERROR("invalid ird_idx:%d irq_cb:%ps\n", irq_idx, irq_cb);
>>> return -EINVAL;
>>> }
>>>
>>> @@ -453,39 +431,37 @@ int dpu_core_irq_register_callback(struct
>>> dpu_kms *dpu_kms, int irq_idx,
>>> VERB("[%pS] irq_idx=%d\n", __builtin_return_address(0), irq_idx);
>>>
>>> spin_lock_irqsave(&dpu_kms->hw_intr->irq_lock, irq_flags);
>>> - trace_dpu_core_irq_register_callback(irq_idx, register_irq_cb);
>>> - list_del_init(®ister_irq_cb->list);
>>> - list_add_tail(®ister_irq_cb->list,
>>> - &dpu_kms->hw_intr->irq_cb_tbl[irq_idx]);
>>> - if (list_is_first(®ister_irq_cb->list,
>>> - &dpu_kms->hw_intr->irq_cb_tbl[irq_idx])) {
>>> - int ret = dpu_hw_intr_enable_irq_locked(
>>> +
>>> + if (dpu_kms->hw_intr->irq_tbl[irq_idx].cb) {
>>> + spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
>>> +
>>> + return -EBUSY;
>>> + }
>> Why is this check present? Ideally there should be only one callback
>> registered.
There should be one callback registered. However I'd prefer to be safe
than sorry and to warn if somebody attempts to register a second
callback here.
>>> +
>>> + 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;
>>> +
>>> + ret = dpu_hw_intr_enable_irq_locked(
>>> dpu_kms->hw_intr,
>>> irq_idx);
>>> - if (ret)
>>> - DPU_ERROR("Fail to enable IRQ for irq_idx:%d\n",
>>> + if (ret)
>>> + DPU_ERROR("Fail to enable IRQ for irq_idx:%d\n",
>>> irq_idx);
>>> - }
>>> spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
>>>
>>> return 0;
>>> }
>>>
>>> int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int
>>> irq_idx,
>>> - struct dpu_irq_callback *register_irq_cb)
>>> + void (*irq_cb)(void *arg, int irq_idx),
>>> + void *irq_arg)
>>> {
>>> unsigned long irq_flags;
>>> + int ret;
>>>
>>> - if (!dpu_kms->hw_intr->irq_cb_tbl) {
>>> - DPU_ERROR("invalid params\n");
>>> - return -EINVAL;
>>> - }
>>> -
>>> - if (!register_irq_cb || !register_irq_cb->func) {
>>> - DPU_ERROR("invalid irq_cb:%d func:%d\n",
>>> - register_irq_cb != NULL,
>>> - register_irq_cb ?
>>> - register_irq_cb->func != NULL : -1);
>>> + if (!irq_cb) {
>>> + DPU_ERROR("invalid ird_idx:%d irq_cb:%ps\n", irq_idx, irq_cb);
>>> return -EINVAL;
>>> }
>>>
>>> @@ -497,18 +473,23 @@ int dpu_core_irq_unregister_callback(struct
>>> dpu_kms *dpu_kms, int irq_idx,
>>> VERB("[%pS] irq_idx=%d\n", __builtin_return_address(0), irq_idx);
>>>
>>> spin_lock_irqsave(&dpu_kms->hw_intr->irq_lock, irq_flags);
>>> - trace_dpu_core_irq_unregister_callback(irq_idx, register_irq_cb);
>>> - list_del_init(®ister_irq_cb->list);
>>> - /* empty callback list but interrupt is still enabled */
>>> - if (list_empty(&dpu_kms->hw_intr->irq_cb_tbl[irq_idx])) {
>>> - int ret = dpu_hw_intr_disable_irq_locked(
>>> - dpu_kms->hw_intr,
>>> - irq_idx);
>>> - if (ret)
>>> - DPU_ERROR("Fail to disable IRQ for irq_idx:%d\n",
>>> - irq_idx);
>>> - VERB("irq_idx=%d ret=%d\n", irq_idx, ret);
>>> + trace_dpu_core_irq_unregister_callback(irq_idx, irq_cb);
>>> +
>>> + if (WARN_ON(dpu_kms->hw_intr->irq_tbl[irq_idx].cb != irq_cb ||
>>> + dpu_kms->hw_intr->irq_tbl[irq_idx].arg != irq_arg)) {
>>> + spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
>>> +
>>> + return -EINVAL;
>>> }
>>
>> Why do we need this check too? Any condition where this wont match?
No, we can drop this.
>>
>>> +
>>> + ret = dpu_hw_intr_disable_irq_locked(dpu_kms->hw_intr, irq_idx);
>>> + if (ret)
>>> + 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;
>>> +
>>> spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
>>>
>>> return 0;
>>> @@ -518,24 +499,18 @@ 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_irq_callback *cb;
>>> unsigned long irq_flags;
>>> - int i, irq_count, cb_count;
>>> -
>>> - if (WARN_ON(!dpu_kms->hw_intr->irq_cb_tbl))
>>> - return 0;
>>> + 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);
>>> - cb_count = 0;
>>> - irq_count = atomic_read(&dpu_kms->hw_intr->irq_counts[i]);
>>> - list_for_each_entry(cb, &dpu_kms->hw_intr->irq_cb_tbl[i], list)
>>> - cb_count++;
>>> + irq_count = atomic_read(&dpu_kms->hw_intr->irq_tbl[i].count);
>>> + cb = dpu_kms->hw_intr->irq_tbl[i].cb;
>>> spin_unlock_irqrestore(&dpu_kms->hw_intr->irq_lock, irq_flags);
>>>
>>> - if (irq_count || cb_count)
>>> - seq_printf(s, "idx:%d irq:%d cb:%d\n",
>>> - i, irq_count, cb_count);
>>> + if (irq_count || cb)
>>> + seq_printf(s, "idx:%d irq:%d cb:%ps\n", i, irq_count, cb);
>>> }
>>>
>>> return 0;
>>> @@ -560,15 +535,8 @@ void dpu_core_irq_preinstall(struct dpu_kms
>>> *dpu_kms)
>>> dpu_disable_all_irqs(dpu_kms);
>>> pm_runtime_put_sync(&dpu_kms->pdev->dev);
>>>
>>> - /* Create irq callbacks for all possible irq_idx */
>>> - dpu_kms->hw_intr->irq_cb_tbl =
>>> kcalloc(dpu_kms->hw_intr->total_irqs,
>>> - sizeof(struct list_head), GFP_KERNEL);
>>> - dpu_kms->hw_intr->irq_counts =
>>> kcalloc(dpu_kms->hw_intr->total_irqs,
>>> - sizeof(atomic_t), GFP_KERNEL);
>>> - for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
>>> - INIT_LIST_HEAD(&dpu_kms->hw_intr->irq_cb_tbl[i]);
>>> - atomic_set(&dpu_kms->hw_intr->irq_counts[i], 0);
>>> - }
>>> + for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++)
>>> + atomic_set(&dpu_kms->hw_intr->irq_tbl[i].count, 0);
>>> }
>>>
>>> void dpu_core_irq_uninstall(struct dpu_kms *dpu_kms)
>>> @@ -577,7 +545,7 @@ void dpu_core_irq_uninstall(struct dpu_kms *dpu_kms)
>>>
>>> pm_runtime_get_sync(&dpu_kms->pdev->dev);
>>> for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++)
>>> - if (!list_empty(&dpu_kms->hw_intr->irq_cb_tbl[i]))
>>> + if (dpu_kms->hw_intr->irq_tbl[i].cb)
>>> DPU_ERROR("irq_idx=%d still enabled/registered\n", i);
>>>
>>> dpu_clear_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 d50e78c9f148..9855e176b173 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
>>> @@ -40,19 +40,21 @@ enum dpu_hw_intr_reg {
>>> * @save_irq_status: array of IRQ status reg storage created during
>>> init
>>> * @total_irqs: total number of irq_idx mapped in the hw_interrupts
>>> * @irq_lock: spinlock for accessing IRQ resources
>>> - * @irq_cb_tbl: array of IRQ callbacks lists
>>> - * @irq_counts: array of IRQ counts
>>> + * @irq_cb_tbl: array of IRQ callbacks
>>> */
>>> struct dpu_hw_intr {
>>> struct dpu_hw_blk_reg_map hw;
>>> - u32 *cache_irq_mask;
>>> + u32 cache_irq_mask[MDP_INTR_MAX];
>>> u32 *save_irq_status;
>>> u32 total_irqs;
>>> spinlock_t irq_lock;
>>> unsigned long irq_mask;
>>>
>>> - struct list_head *irq_cb_tbl;
>>> - atomic_t *irq_counts;
>>> + struct {
>>> + void (*cb)(void *arg, int irq_idx);
>>> + void *arg;
>>> + atomic_t count;
>>> + } irq_tbl[];
>>> };
>>>
>>> /**
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
>>> index 775bcbda860f..d24dcd852d2e 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
>>> @@ -66,18 +66,6 @@
>>>
>>> #define DPU_NAME_SIZE 12
>>>
>>> -/*
>>> - * struct dpu_irq_callback - IRQ callback handlers
>>> - * @list: list to callback
>>> - * @func: intr handler
>>> - * @arg: argument for the handler
>>> - */
>>> -struct dpu_irq_callback {
>>> - struct list_head list;
>>> - void (*func)(void *arg, int irq_idx);
>>> - void *arg;
>>> -};
>>> -
>>> struct dpu_kms {
>>> struct msm_kms base;
>>> struct drm_device *dev;
>>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h
>>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h
>>> index 37bba57675a8..1e2619556f93 100644
>>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h
>>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h
>>> @@ -876,25 +876,25 @@ TRACE_EVENT(dpu_pp_connect_ext_te,
>>> );
>>>
>>> DECLARE_EVENT_CLASS(dpu_core_irq_callback_template,
>>> - TP_PROTO(int irq_idx, struct dpu_irq_callback *callback),
>>> + TP_PROTO(int irq_idx, void *callback),
>>> TP_ARGS(irq_idx, callback),
>>> TP_STRUCT__entry(
>>> __field( int, irq_idx )
>>> - __field( struct dpu_irq_callback *, callback)
>>> + __field( void *, callback)
>>> ),
>>> TP_fast_assign(
>>> __entry->irq_idx = irq_idx;
>>> __entry->callback = callback;
>>> ),
>>> - TP_printk("irq_idx:%d callback:%pK", __entry->irq_idx,
>>> + TP_printk("irq_idx:%d callback:%ps", __entry->irq_idx,
>>> __entry->callback)
>>> );
>>> DEFINE_EVENT(dpu_core_irq_callback_template,
>>> dpu_core_irq_register_callback,
>>> - TP_PROTO(int irq_idx, struct dpu_irq_callback *callback),
>>> + TP_PROTO(int irq_idx, void *callback),
>>> TP_ARGS(irq_idx, callback)
>>> );
>>> DEFINE_EVENT(dpu_core_irq_callback_template,
>>> dpu_core_irq_unregister_callback,
>>> - TP_PROTO(int irq_idx, struct dpu_irq_callback *callback),
>>> + TP_PROTO(int irq_idx, void *callback),
>>> TP_ARGS(irq_idx, callback)
>>> );
--
With best wishes
Dmitry
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