drm/mediatek: set dpi pin mode to gpio low to avoid leakage current
[ Upstream commit 6bd4763fd5
]
Config dpi pins mode to output and pull low when dpi is disabled.
Aovid leakage current from some dpi pins (Hsync Vsync DE ... ).
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
878ca9ebf1
commit
6315839f14
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@ -10,7 +10,9 @@
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/of_graph.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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@ -73,6 +75,9 @@ struct mtk_dpi {
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enum mtk_dpi_out_yc_map yc_map;
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enum mtk_dpi_out_bit_num bit_num;
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enum mtk_dpi_out_channel_swap channel_swap;
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struct pinctrl *pinctrl;
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struct pinctrl_state *pins_gpio;
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struct pinctrl_state *pins_dpi;
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int refcount;
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};
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@ -378,6 +383,9 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi)
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if (--dpi->refcount != 0)
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return;
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if (dpi->pinctrl && dpi->pins_gpio)
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pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
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mtk_dpi_disable(dpi);
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clk_disable_unprepare(dpi->pixel_clk);
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clk_disable_unprepare(dpi->engine_clk);
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@ -402,6 +410,9 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
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goto err_pixel;
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}
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if (dpi->pinctrl && dpi->pins_dpi)
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pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
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mtk_dpi_enable(dpi);
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return 0;
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@ -689,6 +700,26 @@ static int mtk_dpi_probe(struct platform_device *pdev)
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dpi->dev = dev;
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dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev);
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dpi->pinctrl = devm_pinctrl_get(&pdev->dev);
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if (IS_ERR(dpi->pinctrl)) {
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dpi->pinctrl = NULL;
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dev_dbg(&pdev->dev, "Cannot find pinctrl!\n");
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}
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if (dpi->pinctrl) {
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dpi->pins_gpio = pinctrl_lookup_state(dpi->pinctrl, "sleep");
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if (IS_ERR(dpi->pins_gpio)) {
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dpi->pins_gpio = NULL;
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dev_dbg(&pdev->dev, "Cannot find pinctrl idle!\n");
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}
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if (dpi->pins_gpio)
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pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
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dpi->pins_dpi = pinctrl_lookup_state(dpi->pinctrl, "default");
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if (IS_ERR(dpi->pins_dpi)) {
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dpi->pins_dpi = NULL;
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dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
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}
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}
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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dpi->regs = devm_ioremap_resource(dev, mem);
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if (IS_ERR(dpi->regs)) {
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