drm/mediatek: set dpi pin mode to gpio low to avoid leakage current (6bd4763f) · Commits · 戴 / test

drivers/gpu/drm/mediatek/mtk_dpi.c

+31 −0

Original line number	Diff line number	Diff line
		@@ -10,7 +10,9 @@
		#include <linux/kernel.h>
		#include <linux/of.h>
		#include <linux/of_device.h>
		#include <linux/of_gpio.h>
		#include <linux/of_graph.h>
		#include <linux/pinctrl/consumer.h>
		#include <linux/platform_device.h>
		#include <linux/types.h>

		@@ -74,6 +76,9 @@ struct mtk_dpi {
		enum mtk_dpi_out_yc_map yc_map;
		enum mtk_dpi_out_bit_num bit_num;
		enum mtk_dpi_out_channel_swap channel_swap;
		struct pinctrl *pinctrl;
		struct pinctrl_state *pins_gpio;
		struct pinctrl_state *pins_dpi;
		int refcount;
		};

		@@ -379,6 +384,9 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
		if (--dpi->refcount != 0)
		return;

		if (dpi->pinctrl && dpi->pins_gpio)
		pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);

		mtk_dpi_disable(dpi);
		clk_disable_unprepare(dpi->pixel_clk);
		clk_disable_unprepare(dpi->engine_clk);
		@@ -403,6 +411,9 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
		goto err_pixel;
		}

		if (dpi->pinctrl && dpi->pins_dpi)
		pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);

		mtk_dpi_enable(dpi);
		return 0;

		@@ -705,6 +716,26 @@ static int mtk_dpi_probe(struct platform_device *pdev)
		dpi->dev = dev;
		dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev);

		dpi->pinctrl = devm_pinctrl_get(&pdev->dev);
		if (IS_ERR(dpi->pinctrl)) {
		dpi->pinctrl = NULL;
		dev_dbg(&pdev->dev, "Cannot find pinctrl!\n");
		}
		if (dpi->pinctrl) {
		dpi->pins_gpio = pinctrl_lookup_state(dpi->pinctrl, "sleep");
		if (IS_ERR(dpi->pins_gpio)) {
		dpi->pins_gpio = NULL;
		dev_dbg(&pdev->dev, "Cannot find pinctrl idle!\n");
		}
		if (dpi->pins_gpio)
		pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);

		dpi->pins_dpi = pinctrl_lookup_state(dpi->pinctrl, "default");
		if (IS_ERR(dpi->pins_dpi)) {
		dpi->pins_dpi = NULL;
		dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
		}
		}
		mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		dpi->regs = devm_ioremap_resource(dev, mem);
		if (IS_ERR(dpi->regs)) {

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