ASoC: rockchip: Convert RK3288 HDMI to GPIO descriptors

This converts the Rockchip RK3288 HDMI driver to use GPIO
descriptors:

- Look up the HP EN GPIO as an optional descriptor and handle
  it directly, the gpiod API is NULL-tolerant so no special
  guards are needed.

- Let the Jack detection core obtain and handle the HP detection
  GPIO, just pass the right name and gpiod_dev and it will
  do the job. Make sure to check that the GPIO property
  is there first, so it becomes optional.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230929-descriptors-asoc-rockchip-v2-1-2d2c0e043aab@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/rockchip/rk3288_hdmi_analog.c

@@ -12,8 +12,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <sound/core.h>
 #include <sound/jack.h>
 #include <sound/pcm.h>
@@ -26,8 +25,7 @@
 #define DRV_NAME "rk3288-snd-hdmi-analog"
 
 struct rk_drvdata {
-	int gpio_hp_en;
-	int gpio_hp_det;
+	struct gpio_desc *gpio_hp_en;
 };
 
 static int rk_hp_power(struct snd_soc_dapm_widget *w,
@@ -35,11 +33,8 @@ static int rk_hp_power(struct snd_soc_dapm_widget *w,
 {
 	struct rk_drvdata *machine = snd_soc_card_get_drvdata(w->dapm->card);
 
-	if (!gpio_is_valid(machine->gpio_hp_en))
-		return 0;
-
-	gpio_set_value_cansleep(machine->gpio_hp_en,
-				SND_SOC_DAPM_EVENT_ON(event));
+	gpiod_set_value_cansleep(machine->gpio_hp_en,
+				 SND_SOC_DAPM_EVENT_ON(event));
 
 	return 0;
 }
@@ -113,22 +108,23 @@ static int rk_hw_params(struct snd_pcm_substream *substream,
 }
 
 static struct snd_soc_jack_gpio rk_hp_jack_gpio = {
-	.name = "Headphone detection",
+	.name = "rockchip,hp-det",
 	.report = SND_JACK_HEADPHONE,
 	.debounce_time = 150
 };
 
 static int rk_init(struct snd_soc_pcm_runtime *runtime)
 {
-	struct rk_drvdata *machine = snd_soc_card_get_drvdata(runtime->card);
+	struct snd_soc_card *card = runtime->card;
+	struct device *dev = card->dev;
 
-	/* Enable Headset Jack detection */
-	if (gpio_is_valid(machine->gpio_hp_det)) {
+	/* Enable optional Headset Jack detection */
+	if (of_property_present(dev->of_node, "rockchip,hp-det-gpios")) {
+		rk_hp_jack_gpio.gpiod_dev = dev;
 		snd_soc_card_jack_new_pins(runtime->card, "Headphone Jack",
 					   SND_JACK_HEADPHONE, &headphone_jack,
 					   headphone_jack_pins,
 					   ARRAY_SIZE(headphone_jack_pins));
-		rk_hp_jack_gpio.gpio = machine->gpio_hp_det;
 		snd_soc_jack_add_gpios(&headphone_jack, 1, &rk_hp_jack_gpio);
 	}
 
@@ -182,24 +178,10 @@ static int snd_rk_mc_probe(struct platform_device *pdev)
 
 	card->dev = &pdev->dev;
 
-	machine->gpio_hp_det = of_get_named_gpio(np,
-		"rockchip,hp-det-gpios", 0);
-	if (!gpio_is_valid(machine->gpio_hp_det) && machine->gpio_hp_det != -ENODEV)
-		return machine->gpio_hp_det;
-
-	machine->gpio_hp_en = of_get_named_gpio(np,
-		"rockchip,hp-en-gpios", 0);
-	if (!gpio_is_valid(machine->gpio_hp_en) && machine->gpio_hp_en != -ENODEV)
-		return machine->gpio_hp_en;
-
-	if (gpio_is_valid(machine->gpio_hp_en)) {
-		ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_en,
-					    GPIOF_OUT_INIT_LOW, "hp_en");
-		if (ret) {
-			dev_err(card->dev, "cannot get hp_en gpio\n");
-			return ret;
-		}
-	}
+	machine->gpio_hp_en = devm_gpiod_get_optional(&pdev->dev, "rockchip,hp-en", GPIOD_OUT_LOW);
+	if (IS_ERR(machine->gpio_hp_en))
+		return PTR_ERR(machine->gpio_hp_en);
+	gpiod_set_consumer_name(machine->gpio_hp_en, "hp_en");
 
 	ret = snd_soc_of_parse_card_name(card, "rockchip,model");
 	if (ret) {