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SubjectRe: [PATCH] drm/komeda: Add event handling for EMPTY/FULL
Date
Hi James,

On Thursday, 12 December 2019 07:27:55 GMT james qian wang (Arm Technology China) wrote:
> EMPTY/FULL are HW input/output FIFO condition identifer, which are
> useful information for addressing the problem, so expose them.
>
> Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.com>
> ---
> drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c | 13 ++++++++++++-
> drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h | 3 +++
> drivers/gpu/drm/arm/display/komeda/komeda_dev.h | 5 ++++-
> drivers/gpu/drm/arm/display/komeda/komeda_event.c | 2 ++
> 4 files changed, 21 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
> index dd1ecf4276d3..00fa56c29b3e 100644
> --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
> +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
> @@ -20,8 +20,10 @@ static u64 get_lpu_event(struct d71_pipeline *d71_pipeline)
> evts |= KOMEDA_EVENT_IBSY;
> if (raw_status & LPU_IRQ_EOW)
> evts |= KOMEDA_EVENT_EOW;
> + if (raw_status & LPU_IRQ_OVR)
> + evts |= KOMEDA_EVENT_OVR;
>
> - if (raw_status & (LPU_IRQ_ERR | LPU_IRQ_IBSY)) {
> + if (raw_status & (LPU_IRQ_ERR | LPU_IRQ_IBSY | LPU_IRQ_OVR)) {
> u32 restore = 0, tbu_status;
> /* Check error of LPU status */
> status = malidp_read32(reg, BLK_STATUS);
> @@ -45,6 +47,15 @@ static u64 get_lpu_event(struct d71_pipeline *d71_pipeline)
> restore |= LPU_STATUS_ACE3;
> evts |= KOMEDA_ERR_ACE3;
> }
> + if (status & LPU_STATUS_FEMPTY) {
> + restore |= LPU_STATUS_FEMPTY;
> + evts |= KOMEDA_EVENT_EMPTY;
> + }
> + if (status & LPU_STATUS_FFULL) {
> + restore |= LPU_STATUS_FFULL;
> + evts |= KOMEDA_EVENT_FULL;
> + }
> +
> if (restore != 0)
> malidp_write32_mask(reg, BLK_STATUS, restore, 0);
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h b/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
> index 81de6a23e7f3..e80172a0b320 100644
> --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
> +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_regs.h
> @@ -175,6 +175,7 @@
> #define TBU_DOUTSTDCAPB_MASK 0x3F
>
> /* LPU_IRQ_BITS */
> +#define LPU_IRQ_OVR BIT(9)
> #define LPU_IRQ_IBSY BIT(10)
> #define LPU_IRQ_ERR BIT(11)
> #define LPU_IRQ_EOW BIT(12)
> @@ -185,6 +186,8 @@
> #define LPU_STATUS_AXIE BIT(4)
> #define LPU_STATUS_AXIRP BIT(5)
> #define LPU_STATUS_AXIWP BIT(6)
> +#define LPU_STATUS_FEMPTY BIT(11)
> +#define LPU_STATUS_FFULL BIT(14)
> #define LPU_STATUS_ACE0 BIT(16)
> #define LPU_STATUS_ACE1 BIT(17)
> #define LPU_STATUS_ACE2 BIT(18)
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
> index 4a67a80d5fcf..ce27f2f27c24 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
> @@ -20,6 +20,8 @@
> #define KOMEDA_EVENT_OVR BIT_ULL(4)
> #define KOMEDA_EVENT_EOW BIT_ULL(5)
> #define KOMEDA_EVENT_MODE BIT_ULL(6)
> +#define KOMEDA_EVENT_FULL BIT_ULL(7)
> +#define KOMEDA_EVENT_EMPTY BIT_ULL(8)
>
> #define KOMEDA_ERR_TETO BIT_ULL(14)
> #define KOMEDA_ERR_TEMR BIT_ULL(15)
> @@ -49,7 +51,8 @@
> KOMEDA_ERR_ZME | KOMEDA_ERR_MERR | KOMEDA_ERR_TCF |\
> KOMEDA_ERR_TTNG | KOMEDA_ERR_TTF)
>
> -#define KOMEDA_WARN_EVENTS KOMEDA_ERR_CSCE
> +#define KOMEDA_WARN_EVENTS \
> + (KOMEDA_ERR_CSCE | KOMEDA_EVENT_FULL | KOMEDA_EVENT_EMPTY)
>
> #define KOMEDA_INFO_EVENTS (0 \
> | KOMEDA_EVENT_VSYNC \
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_event.c b/drivers/gpu/drm/arm/display/komeda/komeda_event.c
> index 977c38d516da..53f944e66dfc 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_event.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_event.c
> @@ -78,6 +78,8 @@ static void evt_str(struct komeda_str *str, u64 events)
>
> /* LPU errors or events */
> evt_sprintf(str, events & KOMEDA_EVENT_IBSY, "IBSY|");
> + evt_sprintf(str, events & KOMEDA_EVENT_EMPTY, "EMPTY|");
> + evt_sprintf(str, events & KOMEDA_EVENT_FULL, "FULL|");
> evt_sprintf(str, events & KOMEDA_ERR_AXIE, "AXIE|");
> evt_sprintf(str, events & KOMEDA_ERR_ACE0, "ACE0|");
> evt_sprintf(str, events & KOMEDA_ERR_ACE1, "ACE1|");
>

Thanks for the patch,

Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>

--
Mihail



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