C++ (Cpp) rk_edp_link_train_cr Examples

Example #1

File: edp.c Project: lynxis/coreboot-signed

static int rk_edp_hw_link_training(struct rk_edp *edp)
{
	u32 val;
	struct stopwatch sw;

	/* Set link rate and count as you want to establish*/
	write32(&edp->regs->link_bw_set, edp->link_train.link_rate);
	write32(&edp->regs->lane_count_set, edp->link_train.lane_count);

	if (rk_edp_link_train_cr(edp))
		return -1;
	if (rk_edp_link_train_ce(edp))
		return -1;

	write32(&edp->regs->dp_hw_link_training, HW_LT_EN);
	stopwatch_init_msecs_expire(&sw, 10);
	do {
		val = read32(&edp->regs->dp_hw_link_training);
		if (!(val & HW_LT_EN))
			break;
	} while (!stopwatch_expired(&sw));
	if (val & HW_LT_ERR_CODE_MASK) {
		printk(BIOS_ERR, "edp hw link training error: %d\n",
		val >> HW_LT_ERR_CODE_SHIFT);
		return -1;
	}

Example #2

File: rk_edp.c Project: 0xFelix/u-boot-edminiv2

static int rk_edp_hw_link_training(struct rk_edp_priv *edp)
{
	ulong start;
	u32 val;
	int ret;

	/* Set link rate and count as you want to establish */
	writel(edp->link_train.link_rate, &edp->regs->link_bw_set);
	writel(edp->link_train.lane_count, &edp->regs->lane_count_set);

	ret = rk_edp_link_train_cr(edp);
	if (ret)
		return ret;
	ret = rk_edp_link_train_ce(edp);
	if (ret)
		return ret;

	writel(HW_LT_EN, &edp->regs->dp_hw_link_training);
	start = get_timer(0);
	do {
		val = readl(&edp->regs->dp_hw_link_training);
		if (!(val & HW_LT_EN))
			break;
	} while (get_timer(start) < 10);

	if (val & HW_LT_ERR_CODE_MASK) {
		printf("edp hw link training error: %d\n",
		       val >> HW_LT_ERR_CODE_SHIFT);
		return -EIO;
	}