drivers/media/platform/ti/omap3isp/ispcsi2.c

Source file repositories/reference/linux-study-clean/drivers/media/platform/ti/omap3isp/ispcsi2.c

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/ti/omap3isp/ispcsi2.c
Extension
.c
Size
37006 bytes
Lines
1325
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (csi2->frame_skip == 0) {
			ctx->format_id = csi2_ctx_map_format(csi2);
			csi2_ctx_config(isp, csi2, ctx);
			csi2_ctx_enable(isp, csi2, n, 1);
		}
		return;
	}

	if (csi2->output & CSI2_OUTPUT_MEMORY)
		csi2_isr_buffer(csi2);
}

/*
 * omap3isp_csi2_isr - CSI2 interrupt handling.
 */
void omap3isp_csi2_isr(struct isp_csi2_device *csi2)
{
	struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity);
	u32 csi2_irqstatus, cpxio1_irqstatus;
	struct isp_device *isp = csi2->isp;

	if (!csi2->available)
		return;

	csi2_irqstatus = isp_reg_readl(isp, csi2->regs1, ISPCSI2_IRQSTATUS);
	isp_reg_writel(isp, csi2_irqstatus, csi2->regs1, ISPCSI2_IRQSTATUS);

	/* Failure Cases */
	if (csi2_irqstatus & ISPCSI2_IRQSTATUS_COMPLEXIO1_ERR_IRQ) {
		cpxio1_irqstatus = isp_reg_readl(isp, csi2->regs1,
						 ISPCSI2_PHY_IRQSTATUS);
		isp_reg_writel(isp, cpxio1_irqstatus,
			       csi2->regs1, ISPCSI2_PHY_IRQSTATUS);
		dev_dbg(isp->dev, "CSI2: ComplexIO Error IRQ %x\n",
			cpxio1_irqstatus);
		pipe->error = true;
	}

	if (csi2_irqstatus & (ISPCSI2_IRQSTATUS_OCP_ERR_IRQ |
			      ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ |
			      ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ |
			      ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ |
			      ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ)) {
		dev_dbg(isp->dev,
			"CSI2 Err: OCP:%d, Short_pack:%d, ECC:%d, CPXIO2:%d, FIFO_OVF:%d,\n",
			(csi2_irqstatus &
			 ISPCSI2_IRQSTATUS_OCP_ERR_IRQ) ? 1 : 0,
			(csi2_irqstatus &
			 ISPCSI2_IRQSTATUS_SHORT_PACKET_IRQ) ? 1 : 0,
			(csi2_irqstatus &
			 ISPCSI2_IRQSTATUS_ECC_NO_CORRECTION_IRQ) ? 1 : 0,
			(csi2_irqstatus &
			 ISPCSI2_IRQSTATUS_COMPLEXIO2_ERR_IRQ) ? 1 : 0,
			(csi2_irqstatus &
			 ISPCSI2_IRQSTATUS_FIFO_OVF_IRQ) ? 1 : 0);
		pipe->error = true;
	}

	if (omap3isp_module_sync_is_stopping(&csi2->wait, &csi2->stopping))
		return;

	/* Successful cases */
	if (csi2_irqstatus & ISPCSI2_IRQSTATUS_CONTEXT(0))
		csi2_isr_ctx(csi2, &csi2->contexts[0]);

	if (csi2_irqstatus & ISPCSI2_IRQSTATUS_ECC_CORRECTION_IRQ)
		dev_dbg(isp->dev, "CSI2: ECC correction done\n");
}

/* -----------------------------------------------------------------------------
 * ISP video operations
 */

/*
 * csi2_queue - Queues the first buffer when using memory output
 * @video: The video node
 * @buffer: buffer to queue
 */
static int csi2_queue(struct isp_video *video, struct isp_buffer *buffer)
{
	struct isp_device *isp = video->isp;
	struct isp_csi2_device *csi2 = &isp->isp_csi2a;

	csi2_set_outaddr(csi2, buffer->dma);

	/*
	 * If streaming was enabled before there was a buffer queued
	 * or underrun happened in the ISR, the hardware was not enabled
	 * and DMA queue flag ISP_VIDEO_DMAQUEUE_UNDERRUN is still set.
	 * Enable it now.

Annotation

Implementation Notes