[PATCH v2 4/4] drm/msm/dpu: shift IRQ indices by 1
Marijn Suijten
marijn.suijten at somainline.org
Thu Jul 27 19:57:58 UTC 2023
Title nit: How about making this "UP by 1"?
On 2023-07-27 18:04:55, Dmitry Baryshkov wrote:
> In order to simplify IRQ declarations, shift IRQ indices by 1. This
Same here, UP by one.
> makes 0 the 'no IRQ' value. Thanks to this change, we do no longer have
> to explicitly set the 'no interrupt' fields in catalog structures.
"explicitly set unused interrupts to -1" or
"explicitly signifiy 'no interrupt' fields with -1"?
On the other hand this might be confusing since -1 thanks to this patch
no longer means 'no interrupt'. Also okay to leave it as-is.
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> ---
> .../msm/disp/dpu1/catalog/dpu_3_0_msm8998.h | 4 --
> .../msm/disp/dpu1/catalog/dpu_4_0_sdm845.h | 4 --
> .../msm/disp/dpu1/catalog/dpu_5_0_sm8150.h | 8 ---
> .../msm/disp/dpu1/catalog/dpu_5_1_sc8180x.h | 10 ----
> .../msm/disp/dpu1/catalog/dpu_5_4_sm6125.h | 3 --
> .../msm/disp/dpu1/catalog/dpu_6_0_sm8250.h | 8 ---
> .../msm/disp/dpu1/catalog/dpu_6_2_sc7180.h | 3 --
> .../msm/disp/dpu1/catalog/dpu_6_3_sm6115.h | 1 -
> .../msm/disp/dpu1/catalog/dpu_6_4_sm6350.h | 3 --
> .../msm/disp/dpu1/catalog/dpu_6_5_qcm2290.h | 1 -
> .../msm/disp/dpu1/catalog/dpu_6_9_sm6375.h | 1 -
> .../msm/disp/dpu1/catalog/dpu_7_0_sm8350.h | 8 ---
> .../msm/disp/dpu1/catalog/dpu_7_2_sc7280.h | 6 ---
> .../msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h | 13 -----
> .../msm/disp/dpu1/catalog/dpu_8_1_sm8450.h | 12 -----
> .../msm/disp/dpu1/catalog/dpu_9_0_sm8550.h | 12 -----
> drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h | 6 +--
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 2 +-
> .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 2 +-
> .../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 14 +++---
> .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c | 49 +++++++++----------
> .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h | 6 +--
> 22 files changed, 39 insertions(+), 137 deletions(-)
>
<cut out all the repeated catalog changes>
> 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 ba06312cbb16..7c286bafb948 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.h
> @@ -37,7 +37,7 @@ irqreturn_t dpu_core_irq(struct msm_kms *kms);
> */
> u32 dpu_core_irq_read(
> struct dpu_kms *dpu_kms,
> - int irq_idx);
> + unsigned int irq_idx);
>
> /**
> * dpu_core_irq_register_callback - For registering callback function on IRQ
> @@ -52,7 +52,7 @@ u32 dpu_core_irq_read(
> */
> int dpu_core_irq_register_callback(
> struct dpu_kms *dpu_kms,
> - int irq_idx,
> + unsigned int irq_idx,
> void (*irq_cb)(void *arg),
> void *irq_arg);
>
> @@ -67,7 +67,7 @@ int dpu_core_irq_register_callback(
> */
> int dpu_core_irq_unregister_callback(
> struct dpu_kms *dpu_kms,
> - int irq_idx);
> + unsigned int irq_idx);
>
> /**
> * 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 051447a3620c..8ccfeb002b5f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -2555,7 +2555,7 @@ void dpu_encoder_phys_init(struct dpu_encoder_phys *phys_enc,
> phys_enc->enable_state = DPU_ENC_DISABLED;
>
> for (i = 0; i < ARRAY_SIZE(phys_enc->irq); i++)
> - phys_enc->irq[i] = -EINVAL;
> + phys_enc->irq[i] = 0;
phys_enc seems to always be kzalloc'ed before it is passed here, so
maybe we don't need to change the initialization value at all unless you
want to be super-specific. And could memset() otherwise create faster
code?
>
> 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.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
> index f91661a69888..e203f3775ed3 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
> @@ -193,7 +193,7 @@ struct dpu_encoder_phys {
> atomic_t pending_ctlstart_cnt;
> atomic_t pending_kickoff_cnt;
> wait_queue_head_t pending_kickoff_wq;
> - int irq[INTR_IDX_MAX];
> + unsigned int irq[INTR_IDX_MAX];
> bool has_intf_te;
> };
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> index c72ed0e35dce..945b88c5ab58 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> @@ -524,7 +524,7 @@ struct dpu_ubwc_cfg {
> */
> struct dpu_ctl_cfg {
> DPU_HW_BLK_INFO;
> - s32 intr_start;
> + unsigned int intr_start;
> };
>
> /**
> @@ -587,8 +587,8 @@ struct dpu_dspp_cfg {
> struct dpu_pingpong_cfg {
> DPU_HW_BLK_INFO;
> u32 merge_3d;
> - s32 intr_done;
> - s32 intr_rdptr;
> + unsigned int intr_done;
> + unsigned int intr_rdptr;
> const struct dpu_pingpong_sub_blks *sblk;
> };
>
> @@ -635,9 +635,9 @@ struct dpu_intf_cfg {
> u32 type; /* interface type*/
> u32 controller_id;
> u32 prog_fetch_lines_worst_case;
> - s32 intr_underrun;
> - s32 intr_vsync;
> - s32 intr_tear_rd_ptr;
> + unsigned int intr_underrun;
> + unsigned int intr_vsync;
> + unsigned int intr_tear_rd_ptr;
> };
>
> /**
> @@ -656,7 +656,7 @@ struct dpu_wb_cfg {
> u8 vbif_idx;
> u32 maxlinewidth;
> u32 xin_id;
> - s32 intr_wb_done;
> + unsigned int intr_wb_done;
> const u32 *format_list;
> u32 num_formats;
> enum dpu_clk_ctrl_type clk_ctrl;
> 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 ede7161ae904..47f6912ac39e 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
> @@ -200,7 +200,7 @@ static const struct dpu_intr_reg dpu_intr_set_7xxx[] = {
> #define DPU_IRQ_MASK(irq_idx) (BIT(DPU_IRQ_OFFSET(irq_idx)))
>
> static inline struct dpu_hw_intr_entry *dpu_core_irq_get_entry(struct dpu_kms *dpu_kms,
> - int irq_idx)
> + unsigned int irq_idx)
> {
> return &dpu_kms->hw_intr->irq_tbl[irq_idx];
Shouldn't this be -1'd, or should the struct size of this trailing array
be incremented by one in the nirq variable in dpu_hw_intr_init()?
Note that total_irqs = nirq.
> }
> @@ -210,7 +210,7 @@ static inline struct dpu_hw_intr_entry *dpu_core_irq_get_entry(struct dpu_kms *d
> * @dpu_kms: Pointer to DPU's KMS structure
> * @irq_idx: interrupt index
> */
> -static void dpu_core_irq_callback_handler(struct dpu_kms *dpu_kms, int irq_idx)
> +static void dpu_core_irq_callback_handler(struct dpu_kms *dpu_kms, unsigned int irq_idx)
> {
> struct dpu_hw_intr_entry *irq_entry = dpu_core_irq_get_entry(dpu_kms, irq_idx);
>
> @@ -232,7 +232,7 @@ irqreturn_t dpu_core_irq(struct msm_kms *kms)
> struct dpu_kms *dpu_kms = to_dpu_kms(kms);
> struct dpu_hw_intr *intr = dpu_kms->hw_intr;
> int reg_idx;
> - int irq_idx;
> + unsigned int irq_idx;
> u32 irq_status;
> u32 enable_mask;
> int bit;
> @@ -288,7 +288,8 @@ irqreturn_t dpu_core_irq(struct msm_kms *kms)
> return IRQ_HANDLED;
> }
>
> -static int dpu_hw_intr_enable_irq_locked(struct dpu_hw_intr *intr, int irq_idx)
> +static int dpu_hw_intr_enable_irq_locked(struct dpu_hw_intr *intr,
> + unsigned int irq_idx)
> {
> int reg_idx;
> const struct dpu_intr_reg *reg;
> @@ -298,7 +299,7 @@ static int dpu_hw_intr_enable_irq_locked(struct dpu_hw_intr *intr, int irq_idx)
> if (!intr)
> return -EINVAL;
>
> - if (irq_idx < 0 || irq_idx >= intr->total_irqs) {
> + if (!irq_idx || irq_idx > intr->total_irqs) {
> pr_err("invalid IRQ index: [%d]\n", irq_idx);
Logs like this might be harder to interpret (and compare) when the
numbering is different. In addition, all the IRQs in
/d/dri/0/debug/core_irq are shifted up by 1 making them harder to
compare to downstream.
(Which I hope to not have to do again for a while, now that my INTF TE
series is finalized and merged)
Rest looks good, nice cleanup and lightening of the source.
- Marijn
> return -EINVAL;
> }
> @@ -341,7 +342,8 @@ static int dpu_hw_intr_enable_irq_locked(struct dpu_hw_intr *intr, int irq_idx)
> return 0;
> }
>
> -static int dpu_hw_intr_disable_irq_locked(struct dpu_hw_intr *intr, int irq_idx)
> +static int dpu_hw_intr_disable_irq_locked(struct dpu_hw_intr *intr,
> + unsigned int irq_idx)
> {
> int reg_idx;
> const struct dpu_intr_reg *reg;
> @@ -351,7 +353,7 @@ static int dpu_hw_intr_disable_irq_locked(struct dpu_hw_intr *intr, int irq_idx)
> if (!intr)
> return -EINVAL;
>
> - if (irq_idx < 0 || irq_idx >= intr->total_irqs) {
> + if (!irq_idx || irq_idx > intr->total_irqs) {
> pr_err("invalid IRQ index: [%d]\n", irq_idx);
> return -EINVAL;
> }
> @@ -426,7 +428,8 @@ static void dpu_disable_all_irqs(struct dpu_kms *dpu_kms)
> wmb();
> }
>
> -u32 dpu_core_irq_read(struct dpu_kms *dpu_kms, int irq_idx)
> +u32 dpu_core_irq_read(struct dpu_kms *dpu_kms,
> + unsigned int irq_idx)
> {
> struct dpu_hw_intr *intr = dpu_kms->hw_intr;
> int reg_idx;
> @@ -436,13 +439,7 @@ u32 dpu_core_irq_read(struct dpu_kms *dpu_kms, int irq_idx)
> if (!intr)
> return 0;
>
> - if (irq_idx < 0) {
> - DPU_ERROR("[%pS] invalid irq_idx=%d\n",
> - __builtin_return_address(0), irq_idx);
> - return 0;
> - }
> -
> - if (irq_idx < 0 || irq_idx >= intr->total_irqs) {
> + if (!irq_idx || irq_idx > intr->total_irqs) {
> pr_err("invalid IRQ index: [%d]\n", irq_idx);
> return 0;
> }
> @@ -499,7 +496,7 @@ struct dpu_hw_intr *dpu_hw_intr_init(void __iomem *addr,
>
> intr->irq_mask |= BIT(MDP_INTFn_INTR(intf->id));
>
> - if (intf->intr_tear_rd_ptr != -1)
> + if (intf->intr_tear_rd_ptr)
> intr->irq_mask |= BIT(DPU_IRQ_REG(intf->intr_tear_rd_ptr));
> }
>
> @@ -513,9 +510,10 @@ void dpu_hw_intr_destroy(struct dpu_hw_intr *intr)
> kfree(intr);
> }
>
> -int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
> - void (*irq_cb)(void *arg),
> - void *irq_arg)
> +int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms,
> + unsigned int irq_idx,
> + void (*irq_cb)(void *arg),
> + void *irq_arg)
> {
> struct dpu_hw_intr_entry *irq_entry;
> unsigned long irq_flags;
> @@ -526,7 +524,7 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
> return -EINVAL;
> }
>
> - if (irq_idx < 0 || irq_idx >= dpu_kms->hw_intr->total_irqs) {
> + if (!irq_idx || irq_idx > dpu_kms->hw_intr->total_irqs) {
> DPU_ERROR("invalid IRQ index: [%d]\n", irq_idx);
> return -EINVAL;
> }
> @@ -559,13 +557,14 @@ int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,
> return 0;
> }
>
> -int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms, int irq_idx)
> +int dpu_core_irq_unregister_callback(struct dpu_kms *dpu_kms,
> + unsigned int irq_idx)
> {
> struct dpu_hw_intr_entry *irq_entry;
> unsigned long irq_flags;
> int ret;
>
> - if (irq_idx < 0 || irq_idx >= dpu_kms->hw_intr->total_irqs) {
> + if (!irq_idx || irq_idx > dpu_kms->hw_intr->total_irqs) {
> DPU_ERROR("invalid IRQ index: [%d]\n", irq_idx);
> return -EINVAL;
> }
> @@ -600,7 +599,7 @@ static int dpu_debugfs_core_irq_show(struct seq_file *s, void *v)
> int i, irq_count;
> void *cb;
>
> - for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
> + for (i = 1; i <= dpu_kms->hw_intr->total_irqs; i++) {
> spin_lock_irqsave(&dpu_kms->hw_intr->irq_lock, irq_flags);
> irq_entry = dpu_core_irq_get_entry(dpu_kms, i);
> irq_count = atomic_read(&irq_entry->count);
> @@ -635,7 +634,7 @@ 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++) {
> + for (i = 1; i <= dpu_kms->hw_intr->total_irqs; i++) {
> irq_entry = dpu_core_irq_get_entry(dpu_kms, i);
> atomic_set(&irq_entry->count, 0);
> }
> @@ -651,7 +650,7 @@ void dpu_core_irq_uninstall(struct msm_kms *kms)
> return;
>
> pm_runtime_get_sync(&dpu_kms->pdev->dev);
> - for (i = 0; i < dpu_kms->hw_intr->total_irqs; i++) {
> + for (i = 1; i <= dpu_kms->hw_intr->total_irqs; i++) {
> irq_entry = dpu_core_irq_get_entry(dpu_kms, i);
> if (irq_entry->cb)
> DPU_ERROR("irq_idx=%d still enabled/registered\n", i);
> 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 59bde8ab50c8..41a020fd1288 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.h
> @@ -36,9 +36,9 @@ enum dpu_hw_intr_reg {
>
> #define MDP_INTFn_INTR(intf) (MDP_INTF0_INTR + (intf - INTF_0))
>
> -#define DPU_IRQ_IDX(reg_idx, offset) (reg_idx * 32 + offset)
> -#define DPU_IRQ_REG(irq_idx) ((irq_idx) / 32)
> -#define DPU_IRQ_OFFSET(irq_idx) ((irq_idx) % 32)
> +#define DPU_IRQ_IDX(reg_idx, offset) (reg_idx * 32 + offset + 1)
> +#define DPU_IRQ_REG(irq_idx) ((irq_idx - 1) / 32)
> +#define DPU_IRQ_OFFSET(irq_idx) ((irq_idx - 1) % 32)
>
> struct dpu_hw_intr_entry {
> void (*cb)(void *arg);
> --
> 2.39.2
>
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