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// SPDX-License-Identifier: GPL-2.0+
/*
* RZ/G2L Display Unit DRM driver
*
* Copyright (C) 2023 Renesas Electronics Corporation
*
* Based on rcar_du_drv.c
*/
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_client_setup.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_dma.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_probe_helper.h>
#include "rzg2l_du_drv.h"
#include "rzg2l_du_kms.h"
/* -----------------------------------------------------------------------------
* Device Information
*/
static const struct rzg2l_du_device_info rzg2l_du_r9a07g043u_info = {
.channels_mask = BIT(0),
.routes = {
[RZG2L_DU_OUTPUT_DPAD0] = {
.possible_outputs = BIT(0),
.port = 0,
},
},
};
static const struct rzg2l_du_device_info rzg2l_du_r9a07g044_info = {
.channels_mask = BIT(0),
.routes = {
[RZG2L_DU_OUTPUT_DSI0] = {
.possible_outputs = BIT(0),
.port = 0,
},
[RZG2L_DU_OUTPUT_DPAD0] = {
.possible_outputs = BIT(0),
.port = 1,
}
}
};
static const struct of_device_id rzg2l_du_of_table[] = {
{ .compatible = "renesas,r9a07g043u-du", .data = &rzg2l_du_r9a07g043u_info },
{ .compatible = "renesas,r9a07g044-du", .data = &rzg2l_du_r9a07g044_info },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, rzg2l_du_of_table);
const char *rzg2l_du_output_name(enum rzg2l_du_output output)
{
static const char * const names[] = {
[RZG2L_DU_OUTPUT_DSI0] = "DSI0",
[RZG2L_DU_OUTPUT_DPAD0] = "DPAD0"
};
if (output >= ARRAY_SIZE(names))
return "UNKNOWN";
return names[output];
}
/* -----------------------------------------------------------------------------
* DRM operations
*/
DEFINE_DRM_GEM_DMA_FOPS(rzg2l_du_fops);
static const struct drm_driver rzg2l_du_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
.dumb_create = rzg2l_du_dumb_create,
DRM_FBDEV_DMA_DRIVER_OPS,
.fops = &rzg2l_du_fops,
.name = "rzg2l-du",
.desc = "Renesas RZ/G2L Display Unit",
.date = "20230410",
.major = 1,
.minor = 0,
};
/* -----------------------------------------------------------------------------
* Platform driver
*/
static void rzg2l_du_remove(struct platform_device *pdev)
{
struct rzg2l_du_device *rcdu = platform_get_drvdata(pdev);
struct drm_device *ddev = &rcdu->ddev;
drm_dev_unregister(ddev);
drm_atomic_helper_shutdown(ddev);
drm_kms_helper_poll_fini(ddev);
}
static void rzg2l_du_shutdown(struct platform_device *pdev)
{
struct rzg2l_du_device *rcdu = platform_get_drvdata(pdev);
drm_atomic_helper_shutdown(&rcdu->ddev);
}
static int rzg2l_du_probe(struct platform_device *pdev)
{
struct rzg2l_du_device *rcdu;
int ret;
if (drm_firmware_drivers_only())
return -ENODEV;
/* Allocate and initialize the RZ/G2L device structure. */
rcdu = devm_drm_dev_alloc(&pdev->dev, &rzg2l_du_driver,
struct rzg2l_du_device, ddev);
if (IS_ERR(rcdu))
return PTR_ERR(rcdu);
rcdu->dev = &pdev->dev;
rcdu->info = of_device_get_match_data(rcdu->dev);
platform_set_drvdata(pdev, rcdu);
/* I/O resources */
rcdu->mmio = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(rcdu->mmio))
return PTR_ERR(rcdu->mmio);
ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (ret)
return ret;
/* DRM/KMS objects */
ret = rzg2l_du_modeset_init(rcdu);
if (ret < 0) {
/*
* Don't use dev_err_probe(), as it would overwrite the probe
* deferral reason recorded in rzg2l_du_modeset_init().
*/
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev,
"failed to initialize DRM/KMS (%d)\n", ret);
goto error;
}
/*
* Register the DRM device with the core and the connectors with
* sysfs.
*/
ret = drm_dev_register(&rcdu->ddev, 0);
if (ret)
goto error;
drm_info(&rcdu->ddev, "Device %s probed\n", dev_name(&pdev->dev));
drm_client_setup(&rcdu->ddev, NULL);
return 0;
error:
drm_kms_helper_poll_fini(&rcdu->ddev);
return ret;
}
static struct platform_driver rzg2l_du_platform_driver = {
.probe = rzg2l_du_probe,
.remove_new = rzg2l_du_remove,
.shutdown = rzg2l_du_shutdown,
.driver = {
.name = "rzg2l-du",
.of_match_table = rzg2l_du_of_table,
},
};
module_platform_driver(rzg2l_du_platform_driver);
MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");
MODULE_DESCRIPTION("Renesas RZ/G2L Display Unit DRM Driver");
MODULE_LICENSE("GPL");
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