1 files changed, 152 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/samsung-dsim-imx.c b/drivers/gpu/drm/bridge/samsung-dsim-imx.c
new file mode 100644
index 000000000000..17e933137458
--- /dev/null
+++ b/drivers/gpu/drm/bridge/samsung-dsim-imx.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP i.MX8M SoC MIPI DSI driver
+ *
+ * Copyright (C) 2020 Marek Vasut <marex@denx.de>
+ */
+
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/bridge/samsung-dsim.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+enum {
+	DSI_PORT_IN,
+	DSI_PORT_OUT
+};
+
+struct imx_dsim_priv {
+	struct samsung_dsim *dsi;
+	struct drm_encoder encoder;
+};
+
+static const unsigned int imx8mm_dsim_reg_values[] = {
+	[RESET_TYPE] = DSIM_SWRST,
+	[PLL_TIMER] = 500,
+	[STOP_STATE_CNT] = 0xf,
+	[PHYCTRL_ULPS_EXIT] = 0xaf,
+	[PHYCTRL_VREG_LP] = 0,
+	[PHYCTRL_SLEW_UP] = 0,
+	[PHYTIMING_LPX] = 0x06,
+	[PHYTIMING_HS_EXIT] = 0x0b,
+	[PHYTIMING_CLK_PREPARE] = 0x07,
+	[PHYTIMING_CLK_ZERO] = 0x26,
+	[PHYTIMING_CLK_POST] = 0x0d,
+	[PHYTIMING_CLK_TRAIL] = 0x08,
+	[PHYTIMING_HS_PREPARE] = 0x08,
+	[PHYTIMING_HS_ZERO] = 0x0d,
+	[PHYTIMING_HS_TRAIL] = 0x0b,
+};
+
+static bool imx_dsim_mode_fixup(struct device *dev,
+				const struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode)
+{
+	/* At least LCDIF + DSIM needs active low sync */
+	adjusted_mode->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC);
+	adjusted_mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC);
+
+	return true;
+}
+
+static const struct samsung_dsim_host_ops imx_dsim_host_ops = {
+	.mode_fixup = imx_dsim_mode_fixup
+};
+
+static const struct drm_bridge_timings imx_dsim_timings = {
+	.input_bus_flags = DRM_BUS_FLAG_DE_LOW,
+};
+
+static const struct samsung_dsim_driver_data imx8mm_dsi_driver_data = {
+	.reg_ofs = EXYNOS5433_REG_OFS,
+	.plltmr_reg = 0xa0,
+	.has_clklane_stop = 1,
+	.num_clks = 2,
+	.max_freq = 2100,
+	.wait_for_reset = 0,
+	.num_bits_resol = 12,
+	.reg_values = imx8mm_dsim_reg_values,
+	.host_ops = &imx_dsim_host_ops,
+	.bridge_timings = &imx_dsim_timings,
+};
+
+static const struct of_device_id imx_dsim_of_match[] = {
+	{ .compatible = "fsl,imx8mm-mipi-dsim",
+	  .data = &imx8mm_dsi_driver_data },
+	{ }
+};
+
+static int imx_dsim_probe(struct platform_device *pdev)
+{
+	struct imx_dsim_priv *dsi;
+	struct device *dev = &pdev->dev;
+
+	dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
+	if (!dsi)
+		return -ENOMEM;
+	platform_set_drvdata(pdev, dsi);
+
+	dsi->dsi = samsung_dsim_probe(pdev);
+	if (IS_ERR(dsi->dsi))
+		return PTR_ERR(dsi->dsi);
+
+	pm_runtime_enable(dev);
+
+	return 0;
+}
+
+static int imx_dsim_remove(struct platform_device *pdev)
+{
+	struct imx_dsim_priv *dsi = platform_get_drvdata(pdev);
+
+	pm_runtime_disable(&pdev->dev);
+
+	samsung_dsim_remove(dsi->dsi);
+
+	return 0;
+}
+
+static int __maybe_unused imx_dsim_suspend(struct device *dev)
+{
+	struct imx_dsim_priv *dsi = dev_get_drvdata(dev);
+
+	return samsung_dsim_suspend(dsi->dsi);
+}
+
+static int __maybe_unused imx_dsim_resume(struct device *dev)
+{
+	struct imx_dsim_priv *dsi = dev_get_drvdata(dev);
+
+	return samsung_dsim_resume(dsi->dsi);
+}
+
+static const struct dev_pm_ops imx_dsim_pm_ops = {
+	SET_RUNTIME_PM_OPS(imx_dsim_suspend, imx_dsim_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+};
+
+static struct platform_driver imx_dsim_driver = {
+	.probe = imx_dsim_probe,
+	.remove = imx_dsim_remove,
+	.driver = {
+		   .name = "imx-dsim-dsi",
+		   .owner = THIS_MODULE,
+		   .pm = &imx_dsim_pm_ops,
+		   .of_match_table = imx_dsim_of_match,
+	},
+};
+
+module_platform_driver(imx_dsim_driver);
+
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_DESCRIPTION("NXP i.MX8M SoC MIPI DSI");
+MODULE_LICENSE("GPL v2");