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