Re: [PATCH v6] fbtft: add tearing signal detect

On Wed, Jan 27, 2021 at 03:28:22PM +0800, Carlis wrote:

 static int init_display(struct fbtft_par *par)
 {
+	int rc;
+	struct device *dev = par->info->device;
+
+	par->gpio.te = devm_gpiod_get_index_optional(dev, "te", 0, GPIOD_IN);
+	if (IS_ERR(par->gpio.te)) {
+		rc = PTR_ERR(par->gpio.te);
+		pr_err("Failed to request te gpio: %d\n", rc);
+		par->gpio.te = NULL;
+	}
+	if (par->gpio.te) {
+		init_completion(&spi_panel_te);
+		mutex_init(&te_mutex);
+		rc = devm_request_irq(dev,
+				      gpiod_to_irq(par->gpio.te),
+				     spi_panel_te_handler, IRQF_TRIGGER_RISING,
+				     "TE_GPIO", par);
+		if (rc) {
+			pr_err("TE request_irq failed.\n");
+			devm_gpiod_put(dev, par->gpio.te);
+			par->gpio.te = NULL;
+		} else {
+			disable_irq_nosync(gpiod_to_irq(par->gpio.te));
+			pr_info("TE request_irq completion.\n");

#SadFaceEmoji

+		}
+	} else {
+		pr_info("%s:%d, TE gpio not specified\n",
+			__func__, __LINE__);
+	}

regards,
dan carpenter