From 6c4dc8965959c17c314c4b1519aa999ae0651467 Mon Sep 17 00:00:00 2001 From: Svyatoslav Ryhel Date: Tue, 23 Jan 2024 19:16:30 +0200 Subject: [PATCH] video: tegra20: dsi: add reset support Implement reset use to discard any changes which could have been applied to DSI before and can interfere with current configuration. Tested-by: Ion Agorria # HTC One X Tested-by: Svyatoslav Ryhel # Nvidia Tegratab T114 Signed-off-by: Svyatoslav Ryhel --- drivers/video/tegra20/tegra-dsi.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/video/tegra20/tegra-dsi.c b/drivers/video/tegra20/tegra-dsi.c index 25a629535e..fc9ca1310a 100644 --- a/drivers/video/tegra20/tegra-dsi.c +++ b/drivers/video/tegra20/tegra-dsi.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -863,6 +864,7 @@ static int tegra_dsi_bridge_probe(struct udevice *dev) struct tegra_dsi_priv *priv = dev_get_priv(dev); struct mipi_dsi_device *device = &priv->device; struct mipi_dsi_panel_plat *mipi_plat; + struct reset_ctl reset_ctl; int ret; priv->version = dev_get_driver_data(dev); @@ -876,6 +878,13 @@ static int tegra_dsi_bridge_probe(struct udevice *dev) priv->video_fifo_depth = 480; priv->host_fifo_depth = 64; + ret = reset_get_by_name(dev, "dsi", &reset_ctl); + if (ret) { + log_debug("%s: reset_get_by_name() failed: %d\n", + __func__, ret); + return ret; + } + ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, "avdd-dsi-csi-supply", &priv->avdd); if (ret) @@ -914,12 +923,17 @@ static int tegra_dsi_bridge_probe(struct udevice *dev) tegra_dsi_get_format(device->format, &priv->format); + reset_assert(&reset_ctl); + ret = regulator_set_enable_if_allowed(priv->avdd, true); if (ret && ret != -ENOSYS) return ret; tegra_dsi_init_clocks(dev); + mdelay(2); + reset_deassert(&reset_ctl); + return 0; } -- 2.39.5