Use case: .
When the user touches the Delta touch panel (differential measurement), the driver computes the X/Y coordinates. It then uses the S3C2410_LCDCON registers to dynamically adjust the TIMEVAL (vertical sync) or the MVAL (inversion signal) to reduce flicker.
static irqreturn_t delta_irq_handler(int irq, void *dev_id) // Decimation logic here (see section 3.3) return IRQ_HANDLED;
static int __init vis_delta_probe(struct platform_device *pdev) int ret;
MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("vis Delta-Sigma Driver for S3C2410X"); The -vis Delta driver for the S3C2410X represents a classic embedded systems challenge: bridging a high-resolution, low-speed Delta-Sigma peripheral to a resource-constrained ARM9 processor while maintaining real-time video synchronization. While the original driver stacks are brittle and heavily tied to kernel 2.6, the principles of bitstream capture, decimation filtering, and DMA offload remain valid today.
return IRQ_HANDLED; The -vis part of the name suggests that the collected Delta data (likely touch coordinates or ambient light sensor for display adjustment) must be merged with the video output or capture.
Use case: .
When the user touches the Delta touch panel (differential measurement), the driver computes the X/Y coordinates. It then uses the S3C2410_LCDCON registers to dynamically adjust the TIMEVAL (vertical sync) or the MVAL (inversion signal) to reduce flicker.
static irqreturn_t delta_irq_handler(int irq, void *dev_id) // Decimation logic here (see section 3.3) return IRQ_HANDLED;
static int __init vis_delta_probe(struct platform_device *pdev) int ret;
MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("vis Delta-Sigma Driver for S3C2410X"); The -vis Delta driver for the S3C2410X represents a classic embedded systems challenge: bridging a high-resolution, low-speed Delta-Sigma peripheral to a resource-constrained ARM9 processor while maintaining real-time video synchronization. While the original driver stacks are brittle and heavily tied to kernel 2.6, the principles of bitstream capture, decimation filtering, and DMA offload remain valid today.
return IRQ_HANDLED; The -vis part of the name suggests that the collected Delta data (likely touch coordinates or ambient light sensor for display adjustment) must be merged with the video output or capture.