drm/msm/dsi: drop unused GPIOs handling

Neither disp-enable-gpios nor disp-te-gpios are defined in the schema.
None of the board DT files use those GPIO pins. Drop them from the
driver.
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Patchwork: https://patchwork.freedesktop.org/patch/598734/
Link: https://lore.kernel.org/r/20240613-dpu-handle-te-signal-v2-3-67a0116b5366@linaro.org

drivers/gpu/drm/msm/dsi/dsi_host.c

@@ -7,7 +7,6 @@
 #include <linux/delay.h>
 #include <linux/dma-mapping.h>
 #include <linux/err.h>
-#include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of.h>
@@ -130,9 +129,6 @@ struct msm_dsi_host {
 
 	unsigned long src_clk_rate;
 
-	struct gpio_desc *disp_en_gpio;
-	struct gpio_desc *te_gpio;
-
 	const struct msm_dsi_cfg_handler *cfg_hnd;
 
 	struct completion dma_comp;
@@ -1621,28 +1617,6 @@ static irqreturn_t dsi_host_irq(int irq, void *ptr)
 	return IRQ_HANDLED;
 }
 
-static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
-			struct device *panel_device)
-{
-	msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
-							 "disp-enable",
-							 GPIOD_OUT_LOW);
-	if (IS_ERR(msm_host->disp_en_gpio)) {
-		DBG("cannot get disp-enable-gpios %ld",
-				PTR_ERR(msm_host->disp_en_gpio));
-		return PTR_ERR(msm_host->disp_en_gpio);
-	}
-
-	msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
-								GPIOD_IN);
-	if (IS_ERR(msm_host->te_gpio)) {
-		DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
-		return PTR_ERR(msm_host->te_gpio);
-	}
-
-	return 0;
-}
-
 static int dsi_host_attach(struct mipi_dsi_host *host,
 					struct mipi_dsi_device *dsi)
 {
@@ -1659,11 +1633,6 @@ static int dsi_host_attach(struct mipi_dsi_host *host,
 	if (dsi->dsc)
 		msm_host->dsc = dsi->dsc;
 
-	/* Some gpios defined in panel DT need to be controlled by host */
-	ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
-	if (ret)
-		return ret;
-
 	ret = dsi_dev_attach(msm_host->pdev);
 	if (ret)
 		return ret;
@@ -2430,9 +2399,6 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host,
 	dsi_sw_reset(msm_host);
 	dsi_ctrl_enable(msm_host, phy_shared_timings, phy);
 
-	if (msm_host->disp_en_gpio)
-		gpiod_set_value(msm_host->disp_en_gpio, 1);
-
 	msm_host->power_on = true;
 	mutex_unlock(&msm_host->dev_mutex);
 
@@ -2462,9 +2428,6 @@ int msm_dsi_host_power_off(struct mipi_dsi_host *host)
 
 	dsi_ctrl_disable(msm_host);
 
-	if (msm_host->disp_en_gpio)
-		gpiod_set_value(msm_host->disp_en_gpio, 0);
-
 	pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
 
 	cfg_hnd->ops->link_clk_disable(msm_host);