[v2,2/7] media: rockchip: rkisp1: allow separate interrupts

From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>

Depending on the per-soc implementation there can be one interrupt
for isp, mipi and capture events or separate per-event interrupts.

So simply check for the presence of a named "mi" interrupt
to differentiate between the two cases.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
---
 .../platform/rockchip/rkisp1/rkisp1-capture.c |  9 ++-
 .../platform/rockchip/rkisp1/rkisp1-common.h  |  7 ++-
 .../platform/rockchip/rkisp1/rkisp1-dev.c     | 58 ++++++++++++++-----
 .../platform/rockchip/rkisp1/rkisp1-isp.c     | 16 +++--
 4 files changed, 69 insertions(+), 21 deletions(-)

Hi,

On 15.06.21 03:37, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> 
> Depending on the per-soc implementation there can be one interrupt
> for isp, mipi and capture events or separate per-event interrupts.
> 
> So simply check for the presence of a named "mi" interrupt
> to differentiate between the two cases.

So in this patch you actually relay on the 'interrupt-names' property added to
the binding right? So I think you should also update the 'rockchip-isp1.yaml' file.

Thanks,
Dafna

> 
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> ---
>   .../platform/rockchip/rkisp1/rkisp1-capture.c |  9 ++-
>   .../platform/rockchip/rkisp1/rkisp1-common.h  |  7 ++-
>   .../platform/rockchip/rkisp1/rkisp1-dev.c     | 58 ++++++++++++++-----
>   .../platform/rockchip/rkisp1/rkisp1-isp.c     | 16 +++--
>   4 files changed, 69 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> index 5f6c9d1623e4..f70c66c2a1d7 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
> @@ -685,12 +685,17 @@ static void rkisp1_handle_buffer(struct rkisp1_capture *cap)
>   	spin_unlock(&cap->buf.lock);
>   }
>   
> -void rkisp1_capture_isr(struct rkisp1_device *rkisp1)
> +irqreturn_t rkisp1_capture_isr(int irq, void *ctx)
>   {
> +	struct device *dev = ctx;
> +	struct rkisp1_device *rkisp1 = dev_get_drvdata(dev);
>   	unsigned int i;
>   	u32 status;
>   
>   	status = rkisp1_read(rkisp1, RKISP1_CIF_MI_MIS);
> +	if (!status)
> +		return IRQ_NONE;
> +
>   	rkisp1_write(rkisp1, status, RKISP1_CIF_MI_ICR);
>   
>   	for (i = 0; i < ARRAY_SIZE(rkisp1->capture_devs); ++i) {
> @@ -718,6 +723,8 @@ void rkisp1_capture_isr(struct rkisp1_device *rkisp1)
>   		cap->is_streaming = false;
>   		wake_up(&cap->done);
>   	}
> +
> +	return IRQ_HANDLED;
>   }
>   
>   /* ----------------------------------------------------------------------------
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> index be8a350c7527..25dd5c93620e 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h
> @@ -12,6 +12,7 @@
>   #define _RKISP1_COMMON_H
>   
>   #include <linux/clk.h>
> +#include <linux/interrupt.h>
>   #include <linux/mutex.h>
>   #include <linux/rkisp1-config.h>
>   #include <media/media-device.h>
> @@ -459,9 +460,9 @@ void rkisp1_params_configure(struct rkisp1_params *params,
>   void rkisp1_params_disable(struct rkisp1_params *params);
>   
>   /* irq handlers */
> -void rkisp1_isp_isr(struct rkisp1_device *rkisp1);
> -void rkisp1_mipi_isr(struct rkisp1_device *rkisp1);
> -void rkisp1_capture_isr(struct rkisp1_device *rkisp1);
> +irqreturn_t rkisp1_isp_isr(int irq, void *ctx);
> +irqreturn_t rkisp1_mipi_isr(int irq, void *ctx);
> +irqreturn_t rkisp1_capture_isr(int irq, void *ctx);
>   void rkisp1_stats_isr(struct rkisp1_stats *stats, u32 isp_ris);
>   void rkisp1_params_isr(struct rkisp1_device *rkisp1);
>   
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> index 7afa4c123834..ddc05189c62a 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> @@ -385,18 +385,15 @@ static int rkisp1_entities_register(struct rkisp1_device *rkisp1)
>   
>   static irqreturn_t rkisp1_isr(int irq, void *ctx)
>   {
> -	struct device *dev = ctx;
> -	struct rkisp1_device *rkisp1 = dev_get_drvdata(dev);
> -
>   	/*
>   	 * Call rkisp1_capture_isr() first to handle the frame that
>   	 * potentially completed using the current frame_sequence number before
>   	 * it is potentially incremented by rkisp1_isp_isr() in the vertical
>   	 * sync.
>   	 */
> -	rkisp1_capture_isr(rkisp1);
> -	rkisp1_isp_isr(rkisp1);
> -	rkisp1_mipi_isr(rkisp1);
> +	rkisp1_capture_isr(irq, ctx);
> +	rkisp1_isp_isr(irq, ctx);
> +	rkisp1_mipi_isr(irq, ctx);
>   
>   	return IRQ_HANDLED;
>   }
> @@ -478,15 +475,50 @@ static int rkisp1_probe(struct platform_device *pdev)
>   	if (IS_ERR(rkisp1->base_addr))
>   		return PTR_ERR(rkisp1->base_addr);
>   
> -	irq = platform_get_irq(pdev, 0);
> -	if (irq < 0)
> +	irq = platform_get_irq_byname_optional(pdev, "mi");
> +	if (irq == -EPROBE_DEFER) {
>   		return irq;
> +	} else if (irq < 0) {
> +		irq = platform_get_irq(pdev, 0);
> +		if (irq < 0)
> +			return irq;
> +
> +		ret = devm_request_irq(dev, irq, rkisp1_isr, IRQF_SHARED,
> +				       dev_driver_string(dev), dev);
> +		if (ret) {
> +			dev_err(dev, "request irq failed: %d\n", ret);
> +			return ret;
> +		}
> +	} else {
> +		/* we test-got the MI (capture) interrupt */
> +		ret = devm_request_irq(dev, irq, rkisp1_capture_isr, IRQF_SHARED,
> +				       dev_driver_string(dev), dev);
> +		if (ret) {
> +			dev_err(dev, "request mi irq failed: %d\n", ret);
> +			return ret;
> +		}
>   
> -	ret = devm_request_irq(dev, irq, rkisp1_isr, IRQF_SHARED,
> -			       dev_driver_string(dev), dev);
> -	if (ret) {
> -		dev_err(dev, "request irq failed: %d\n", ret);
> -		return ret;
> +		irq = platform_get_irq_byname_optional(pdev, "mipi");
> +		if (irq < 0)
> +			return irq;
> +
> +		ret = devm_request_irq(dev, irq, rkisp1_mipi_isr, IRQF_SHARED,
> +				       dev_driver_string(dev), dev);
> +		if (ret) {
> +			dev_err(dev, "request mipi irq failed: %d\n", ret);
> +			return ret;
> +		}
> +
> +		irq = platform_get_irq_byname_optional(pdev, "isp");
> +		if (irq < 0)
> +			return irq;
> +
> +		ret = devm_request_irq(dev, irq, rkisp1_isp_isr, IRQF_SHARED,
> +				       dev_driver_string(dev), dev);
> +		if (ret) {
> +			dev_err(dev, "request isp irq failed: %d\n", ret);
> +			return ret;
> +		}
>   	}
>   
>   	for (i = 0; i < match_data->size; i++)
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> index 2e5b57e3aedc..1de98e688008 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c
> @@ -1090,13 +1090,15 @@ void rkisp1_isp_unregister(struct rkisp1_device *rkisp1)
>    * Interrupt handlers
>    */
>   
> -void rkisp1_mipi_isr(struct rkisp1_device *rkisp1)
> +irqreturn_t rkisp1_mipi_isr(int irq, void *ctx)
>   {
> +	struct device *dev = ctx;
> +	struct rkisp1_device *rkisp1 = dev_get_drvdata(dev);
>   	u32 val, status;
>   
>   	status = rkisp1_read(rkisp1, RKISP1_CIF_MIPI_MIS);
>   	if (!status)
> -		return;
> +		return IRQ_NONE;
>   
>   	rkisp1_write(rkisp1, status, RKISP1_CIF_MIPI_ICR);
>   
> @@ -1131,6 +1133,8 @@ void rkisp1_mipi_isr(struct rkisp1_device *rkisp1)
>   	} else {
>   		rkisp1->debug.mipi_error++;
>   	}
> +
> +	return IRQ_HANDLED;
>   }
>   
>   static void rkisp1_isp_queue_event_sof(struct rkisp1_isp *isp)
> @@ -1143,13 +1147,15 @@ static void rkisp1_isp_queue_event_sof(struct rkisp1_isp *isp)
>   	v4l2_event_queue(isp->sd.devnode, &event);
>   }
>   
> -void rkisp1_isp_isr(struct rkisp1_device *rkisp1)
> +irqreturn_t rkisp1_isp_isr(int irq, void *ctx)
>   {
> +	struct device *dev = ctx;
> +	struct rkisp1_device *rkisp1 = dev_get_drvdata(dev);
>   	u32 status, isp_err;
>   
>   	status = rkisp1_read(rkisp1, RKISP1_CIF_ISP_MIS);
>   	if (!status)
> -		return;
> +		return IRQ_NONE;
>   
>   	rkisp1_write(rkisp1, status, RKISP1_CIF_ISP_ICR);
>   
> @@ -1191,4 +1197,6 @@ void rkisp1_isp_isr(struct rkisp1_device *rkisp1)
>   		 */
>   		rkisp1_params_isr(rkisp1);
>   	}
> +
> +	return IRQ_HANDLED;
>   }
>