176 lines
4.0 KiB
C
176 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* RZ/G2L Display Unit DRM driver
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*
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* Copyright (C) 2023 Renesas Electronics Corporation
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*
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* Based on rcar_du_drv.c
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*/
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#include <linux/dma-mapping.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fbdev_generic.h>
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#include <drm/drm_gem_dma_helper.h>
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#include <drm/drm_probe_helper.h>
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#include "rzg2l_du_drv.h"
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#include "rzg2l_du_kms.h"
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/* -----------------------------------------------------------------------------
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* Device Information
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*/
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static const struct rzg2l_du_device_info rzg2l_du_r9a07g044_info = {
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.channels_mask = BIT(0),
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.routes = {
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[RZG2L_DU_OUTPUT_DSI0] = {
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.possible_outputs = BIT(0),
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.port = 0,
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},
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[RZG2L_DU_OUTPUT_DPAD0] = {
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.possible_outputs = BIT(0),
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.port = 1,
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}
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}
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};
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static const struct of_device_id rzg2l_du_of_table[] = {
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{ .compatible = "renesas,r9a07g044-du", .data = &rzg2l_du_r9a07g044_info },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, rzg2l_du_of_table);
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const char *rzg2l_du_output_name(enum rzg2l_du_output output)
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{
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static const char * const names[] = {
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[RZG2L_DU_OUTPUT_DSI0] = "DSI0",
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[RZG2L_DU_OUTPUT_DPAD0] = "DPAD0"
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};
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if (output >= ARRAY_SIZE(names))
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return "UNKNOWN";
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return names[output];
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}
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/* -----------------------------------------------------------------------------
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* DRM operations
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*/
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DEFINE_DRM_GEM_DMA_FOPS(rzg2l_du_fops);
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static const struct drm_driver rzg2l_du_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
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.dumb_create = rzg2l_du_dumb_create,
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.fops = &rzg2l_du_fops,
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.name = "rzg2l-du",
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.desc = "Renesas RZ/G2L Display Unit",
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.date = "20230410",
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.major = 1,
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.minor = 0,
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};
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/* -----------------------------------------------------------------------------
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* Platform driver
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*/
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static void rzg2l_du_remove(struct platform_device *pdev)
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{
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struct rzg2l_du_device *rcdu = platform_get_drvdata(pdev);
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struct drm_device *ddev = &rcdu->ddev;
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drm_dev_unregister(ddev);
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drm_atomic_helper_shutdown(ddev);
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drm_kms_helper_poll_fini(ddev);
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}
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static void rzg2l_du_shutdown(struct platform_device *pdev)
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{
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struct rzg2l_du_device *rcdu = platform_get_drvdata(pdev);
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drm_atomic_helper_shutdown(&rcdu->ddev);
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}
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static int rzg2l_du_probe(struct platform_device *pdev)
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{
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struct rzg2l_du_device *rcdu;
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int ret;
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if (drm_firmware_drivers_only())
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return -ENODEV;
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/* Allocate and initialize the RZ/G2L device structure. */
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rcdu = devm_drm_dev_alloc(&pdev->dev, &rzg2l_du_driver,
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struct rzg2l_du_device, ddev);
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if (IS_ERR(rcdu))
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return PTR_ERR(rcdu);
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rcdu->dev = &pdev->dev;
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rcdu->info = of_device_get_match_data(rcdu->dev);
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platform_set_drvdata(pdev, rcdu);
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/* I/O resources */
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rcdu->mmio = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(rcdu->mmio))
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return PTR_ERR(rcdu->mmio);
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ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
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if (ret)
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return ret;
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/* DRM/KMS objects */
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ret = rzg2l_du_modeset_init(rcdu);
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if (ret < 0) {
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/*
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* Don't use dev_err_probe(), as it would overwrite the probe
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* deferral reason recorded in rzg2l_du_modeset_init().
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*/
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if (ret != -EPROBE_DEFER)
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dev_err(&pdev->dev,
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"failed to initialize DRM/KMS (%d)\n", ret);
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goto error;
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}
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/*
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* Register the DRM device with the core and the connectors with
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* sysfs.
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*/
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ret = drm_dev_register(&rcdu->ddev, 0);
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if (ret)
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goto error;
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drm_info(&rcdu->ddev, "Device %s probed\n", dev_name(&pdev->dev));
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drm_fbdev_generic_setup(&rcdu->ddev, 32);
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return 0;
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error:
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drm_kms_helper_poll_fini(&rcdu->ddev);
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return ret;
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}
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static struct platform_driver rzg2l_du_platform_driver = {
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.probe = rzg2l_du_probe,
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.remove_new = rzg2l_du_remove,
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.shutdown = rzg2l_du_shutdown,
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.driver = {
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.name = "rzg2l-du",
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.of_match_table = rzg2l_du_of_table,
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},
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};
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module_platform_driver(rzg2l_du_platform_driver);
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MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");
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MODULE_DESCRIPTION("Renesas RZ/G2L Display Unit DRM Driver");
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MODULE_LICENSE("GPL");
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