-vis On S3c2410x Delta Driver - ((full)) Jun 2026

Testing on a S3c2410x at 200 MHz with a 640x480 16bpp LCD:

static long vis_delta_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) struct vis_delta_device *vis = filp->private_data; switch(cmd) case VIS_SET_BRIGHTNESS: // Map Delta-sigma value to LCD PWM writel(arg, vis->reg_base + S3C2410_LCDCON5); break; case VIS_GET_TOUCH_RAW: copy_to_user((void __user *)arg, vis->delta_sigma_samples, sizeof(vis->delta_sigma_samples)); break; -vis On S3c2410x Delta Driver -

struct vis_s3c_delta_state // Shadow registers u32 lcdcon1_shadow; u32 lcdcon2_shadow; u32 lcdcon3_shadow; u32 lcdcon4_shadow; u32 lcdcon5_shadow; // Delta flags unsigned long dirty_mask; // Bitmask of registers to update Testing on a S3c2410x at 200 MHz with

Crucially, the S3C2410x integrates several peripherals that are vital for this application. Its LCD controller allows for the direct driving of display panels, a necessity for any Visual Interface System. Furthermore, its multi-channel UART and GPIO capabilities provide the physical layer required to communicate with external Delta drivers. The challenge, however, lies not in the hardware's existence, but in the software's ability to juggle the graphical user interface (GUI) without starving the real-time control threads. The challenge, however, lies not in the hardware's

static const struct v4l2_ctrl_ops s3c2410_delta_ctrl_ops = .s_ctrl = s3c2410_delta_s_ctrl, ;