1 files changed, 158 insertions, 0 deletions

diff --git a/drivers/gpu/drm/imx/dc/dc-pe.c b/drivers/gpu/drm/imx/dc/dc-pe.c
new file mode 100644
index 000000000000..6676c22f3f45
--- /dev/null
+++ b/drivers/gpu/drm/imx/dc/dc-pe.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2024 NXP
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+
+#include "dc-drv.h"
+#include "dc-fu.h"
+#include "dc-pe.h"
+
+static int dc_pe_bind(struct device *dev, struct device *master, void *data)
+{
+	struct dc_drm_device *dc_drm = data;
+	struct dc_pe *pe;
+	int ret;
+
+	pe = devm_kzalloc(dev, sizeof(*pe), GFP_KERNEL);
+	if (!pe)
+		return -ENOMEM;
+
+	pe->clk_axi = devm_clk_get(dev, NULL);
+	if (IS_ERR(pe->clk_axi))
+		return dev_err_probe(dev, PTR_ERR(pe->clk_axi),
+				     "failed to get AXI clock\n");
+
+	pe->dev = dev;
+
+	dev_set_drvdata(dev, pe);
+
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return ret;
+
+	dc_drm->pe = pe;
+
+	return 0;
+}
+
+/*
+ * It's possible to get the child device pointers from the child component
+ * bind callbacks, but it depends on the component helper behavior to bind
+ * the pixel engine component first.  To avoid the dependency, post bind to
+ * get the pointers from dc_drm in a safe manner.
+ */
+void dc_pe_post_bind(struct dc_drm_device *dc_drm)
+{
+	struct dc_pe *pe = dc_drm->pe;
+	int i;
+
+	for (i = 0; i < DC_DISPLAYS; i++) {
+		pe->cf_safe[i] = dc_drm->cf_safe[i];
+		pe->cf_cont[i] = dc_drm->cf_cont[i];
+		pe->ed_safe[i] = dc_drm->ed_safe[i];
+		pe->ed_cont[i] = dc_drm->ed_cont[i];
+	}
+
+	for (i = 0; i < DC_DISP_FU_CNT; i++)
+		pe->fu_disp[i] = dc_drm->fu_disp[i];
+
+	for (i = 0; i < DC_LB_CNT; i++)
+		pe->lb[i] = dc_drm->lb[i];
+}
+
+static const struct component_ops dc_pe_ops = {
+	.bind = dc_pe_bind,
+};
+
+static int dc_pe_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	ret = devm_of_platform_populate(&pdev->dev);
+	if (ret < 0)
+		return ret;
+
+	ret = component_add(&pdev->dev, &dc_pe_ops);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "failed to add component\n");
+
+	return 0;
+}
+
+static void dc_pe_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &dc_pe_ops);
+}
+
+static int dc_pe_runtime_suspend(struct device *dev)
+{
+	struct dc_pe *pe = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(pe->clk_axi);
+
+	return 0;
+}
+
+static int dc_pe_runtime_resume(struct device *dev)
+{
+	struct dc_pe *pe = dev_get_drvdata(dev);
+	int i, ret;
+
+	ret = clk_prepare_enable(pe->clk_axi);
+	if (ret) {
+		dev_err(dev, "failed to enable AXI clock: %d\n", ret);
+		return ret;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(pe->cf_safe); i++)
+		dc_cf_init(pe->cf_safe[i]);
+
+	for (i = 0; i < ARRAY_SIZE(pe->cf_cont); i++)
+		dc_cf_init(pe->cf_cont[i]);
+
+	for (i = 0; i < ARRAY_SIZE(pe->ed_safe); i++)
+		dc_ed_init(pe->ed_safe[i]);
+
+	for (i = 0; i < ARRAY_SIZE(pe->ed_cont); i++)
+		dc_ed_init(pe->ed_cont[i]);
+
+	for (i = 0; i < ARRAY_SIZE(pe->fu_disp); i++)
+		pe->fu_disp[i]->ops.init(pe->fu_disp[i]);
+
+	for (i = 0; i < ARRAY_SIZE(pe->lb); i++)
+		dc_lb_init(pe->lb[i]);
+
+	return 0;
+}
+
+static const struct dev_pm_ops dc_pe_pm_ops = {
+	RUNTIME_PM_OPS(dc_pe_runtime_suspend, dc_pe_runtime_resume, NULL)
+};
+
+static const struct of_device_id dc_pe_dt_ids[] = {
+	{ .compatible = "fsl,imx8qxp-dc-pixel-engine", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dc_pe_dt_ids);
+
+struct platform_driver dc_pe_driver = {
+	.probe = dc_pe_probe,
+	.remove = dc_pe_remove,
+	.driver = {
+		.name = "imx8-dc-pixel-engine",
+		.suppress_bind_attrs = true,
+		.of_match_table = dc_pe_dt_ids,
+		.pm = pm_sleep_ptr(&dc_pe_pm_ops),
+	},
+};