linux-kernel - [PATCH RESEND 01/13] omapfb: connector-hdmi: switch to using gpiod API

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Message-Id: <20221103-omapfb-gpiod-v1-1-cba1fae5a77c@gmail.com>
Date:   Thu,  3 Nov 2022 20:16:30 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Helge Deller <deller@....de>, Tony Lindgren <tony@...mide.com>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        Sebastian Reichel <sre@...nel.org>
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-omap@...r.kernel.org, linux-fbdev@...r.kernel.org
Subject: [PATCH RESEND 01/13] omapfb: connector-hdmi: switch to using gpiod API

Switch the driver from legacy gpio API that is deprecated to the newer
gpiod API that respects line polarities described in ACPI/DT.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 .../fbdev/omap2/omapfb/displays/connector-hdmi.c   | 49 +++++++---------------
 1 file changed, 14 insertions(+), 35 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/displays/connector-hdmi.c b/drivers/video/fbdev/omap2/omapfb/displays/connector-hdmi.c
index 670b9c6eb5a9..8f9ff9fb4ca4 100644
--- a/drivers/video/fbdev/omap2/omapfb/displays/connector-hdmi.c
+++ b/drivers/video/fbdev/omap2/omapfb/displays/connector-hdmi.c
@@ -6,11 +6,12 @@
  * Author: Tomi Valkeinen <tomi.valkeinen@...com>
  */
 
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 
 #include <drm/drm_edid.h>
 
@@ -41,7 +42,7 @@ struct panel_drv_data {
 
 	struct omap_video_timings timings;
 
-	int hpd_gpio;
+	struct gpio_desc *hpd_gpio;
 };
 
 #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
@@ -155,8 +156,8 @@ static bool hdmic_detect(struct omap_dss_device *dssdev)
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 	struct omap_dss_device *in = ddata->in;
 
-	if (gpio_is_valid(ddata->hpd_gpio))
-		return gpio_get_value_cansleep(ddata->hpd_gpio);
+	if (ddata->hpd_gpio)
+		return gpiod_get_value_cansleep(ddata->hpd_gpio);
 	else
 		return in->ops.hdmi->detect(in);
 }
@@ -197,31 +198,6 @@ static struct omap_dss_driver hdmic_driver = {
 	.set_hdmi_infoframe	= hdmic_set_infoframe,
 };
 
-static int hdmic_probe_of(struct platform_device *pdev)
-{
-	struct panel_drv_data *ddata = platform_get_drvdata(pdev);
-	struct device_node *node = pdev->dev.of_node;
-	struct omap_dss_device *in;
-	int gpio;
-
-	/* HPD GPIO */
-	gpio = of_get_named_gpio(node, "hpd-gpios", 0);
-	if (gpio_is_valid(gpio))
-		ddata->hpd_gpio = gpio;
-	else
-		ddata->hpd_gpio = -ENODEV;
-
-	in = omapdss_of_find_source_for_first_ep(node);
-	if (IS_ERR(in)) {
-		dev_err(&pdev->dev, "failed to find video source\n");
-		return PTR_ERR(in);
-	}
-
-	ddata->in = in;
-
-	return 0;
-}
-
 static int hdmic_probe(struct platform_device *pdev)
 {
 	struct panel_drv_data *ddata;
@@ -238,15 +214,18 @@ static int hdmic_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, ddata);
 	ddata->dev = &pdev->dev;
 
-	r = hdmic_probe_of(pdev);
+	ddata->hpd_gpio = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN);
+	r = PTR_ERR_OR_ZERO(ddata->hpd_gpio);
 	if (r)
 		return r;
 
-	if (gpio_is_valid(ddata->hpd_gpio)) {
-		r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
-				GPIOF_DIR_IN, "hdmi_hpd");
-		if (r)
-			goto err_reg;
+	gpiod_set_consumer_name(ddata->hpd_gpio, "hdmi_hpd");
+
+	ddata->in = omapdss_of_find_source_for_first_ep(pdev->dev.of_node);
+	r = PTR_ERR_OR_ZERO(ddata->in);
+	if (r) {
+		dev_err(&pdev->dev, "failed to find video source\n");
+		return r;
 	}
 
 	ddata->timings = hdmic_default_timings;

-- 
b4 0.11.0-dev-28747