From 446c645f7fe480a4420072728faa1f261530b984 Mon Sep 17 00:00:00 2001 From: Lad Prabhakar Date: Fri, 11 Apr 2025 19:05:43 +0200 Subject: [PATCH] media: rzg2l-cru: Add function pointer to check if FIFO is empty Add a `fifo_empty` function pointer to the `rzg2l_cru_info` structure and pass it as part of the OF data. On RZ/G3E and RZ/V2H(P) SoCs, checking if the FIFO is empty requires a different register configuration. Implement `rzg2l_fifo_empty()` and update the code to use it from the function pointer. Reviewed-by: Laurent Pinchart Signed-off-by: Lad Prabhakar Signed-off-by: Tommaso Merciai Link: https://lore.kernel.org/r/20250411170624.472257-16-tommaso.merciai.xr@bp.renesas.com Signed-off-by: Laurent Pinchart Signed-off-by: Hans Verkuil --- .../platform/renesas/rzg2l-cru/rzg2l-core.c | 1 + .../platform/renesas/rzg2l-cru/rzg2l-cru.h | 3 +++ .../platform/renesas/rzg2l-cru/rzg2l-video.c | 23 +++++++++++++------ 3 files changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c index ae989fa2768b3..3b5de84533192 100644 --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c @@ -359,6 +359,7 @@ static const struct rzg2l_cru_info rzgl2_cru_info = { .irq_handler = rzg2l_cru_irq, .enable_interrupts = rzg2l_cru_enable_interrupts, .disable_interrupts = rzg2l_cru_disable_interrupts, + .fifo_empty = rzg2l_fifo_empty, }; static const struct of_device_id rzg2l_cru_of_id_table[] = { diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h index 3f694044d8cd1..2e17bfef43ce6 100644 --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-cru.h @@ -88,6 +88,7 @@ struct rzg2l_cru_info { irqreturn_t (*irq_handler)(int irq, void *data); void (*enable_interrupts)(struct rzg2l_cru_dev *cru); void (*disable_interrupts)(struct rzg2l_cru_dev *cru); + bool (*fifo_empty)(struct rzg2l_cru_dev *cru); }; /** @@ -185,4 +186,6 @@ const struct rzg2l_cru_ip_format *rzg2l_cru_ip_index_to_fmt(u32 index); void rzg2l_cru_enable_interrupts(struct rzg2l_cru_dev *cru); void rzg2l_cru_disable_interrupts(struct rzg2l_cru_dev *cru); +bool rzg2l_fifo_empty(struct rzg2l_cru_dev *cru); + #endif diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c index a104821d823f9..d35e9b2074937 100644 --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c @@ -290,9 +290,23 @@ static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru, return 0; } -void rzg2l_cru_stop_image_processing(struct rzg2l_cru_dev *cru) +bool rzg2l_fifo_empty(struct rzg2l_cru_dev *cru) { u32 amnfifopntr, amnfifopntr_w, amnfifopntr_r_y; + + amnfifopntr = rzg2l_cru_read(cru, AMnFIFOPNTR); + + amnfifopntr_w = amnfifopntr & AMnFIFOPNTR_FIFOWPNTR; + amnfifopntr_r_y = + (amnfifopntr & AMnFIFOPNTR_FIFORPNTR_Y) >> 16; + if (amnfifopntr_w == amnfifopntr_r_y) + return true; + + return amnfifopntr_w == amnfifopntr_r_y; +} + +void rzg2l_cru_stop_image_processing(struct rzg2l_cru_dev *cru) +{ unsigned int retries = 0; unsigned long flags; u32 icnms; @@ -320,12 +334,7 @@ void rzg2l_cru_stop_image_processing(struct rzg2l_cru_dev *cru) /* Wait until the FIFO becomes empty */ for (retries = 5; retries > 0; retries--) { - amnfifopntr = rzg2l_cru_read(cru, AMnFIFOPNTR); - - amnfifopntr_w = amnfifopntr & AMnFIFOPNTR_FIFOWPNTR; - amnfifopntr_r_y = - (amnfifopntr & AMnFIFOPNTR_FIFORPNTR_Y) >> 16; - if (amnfifopntr_w == amnfifopntr_r_y) + if (cru->info->fifo_empty(cru)) break; usleep_range(10, 20); -- 2.47.2