diff options
author | Laurentiu Palcu <laurentiu.palcu@nxp.com> | 2020-07-31 11:18:30 +0300 |
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committer | Lucas Stach <l.stach@pengutronix.de> | 2020-09-09 17:39:48 +0300 |
commit | 9021c317b77024fb2642af7e84ad944769ae0949 (patch) | |
tree | 33cad18bdbf967a5ee7f503790a8cac014bb1ea1 /drivers/gpu/drm/imx/dcss/dcss-drv.c | |
parent | ce625f45670c90241e06d406cd1b0dbd19ed1044 (diff) | |
download | linux-9021c317b77024fb2642af7e84ad944769ae0949.tar.xz |
drm/imx: Add initial support for DCSS on iMX8MQ
This adds initial support for iMX8MQ's Display Controller Subsystem (DCSS).
Some of its capabilities include:
* 4K@60fps;
* HDR10;
* one graphics and 2 video pipelines;
* on-the-fly decompression of compressed video and graphics;
The reference manual can be found here:
https://www.nxp.com/webapp/Download?colCode=IMX8MDQLQRM
The current patch adds only basic functionality: one primary plane for
graphics, linear, tiled and super-tiled buffers support (no graphics
decompression yet), no HDR10 and no video planes.
Video planes support and HDR10 will be added in subsequent patches once
per-plane de-gamma/CSC/gamma support is in.
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@nxp.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200731081836.3048-3-laurentiu.palcu@oss.nxp.com
Diffstat (limited to 'drivers/gpu/drm/imx/dcss/dcss-drv.c')
-rw-r--r-- | drivers/gpu/drm/imx/dcss/dcss-drv.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dcss/dcss-drv.c b/drivers/gpu/drm/imx/dcss/dcss-drv.c new file mode 100644 index 000000000000..8dc2f85c514b --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-drv.c @@ -0,0 +1,138 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <drm/drm_of.h> + +#include "dcss-dev.h" +#include "dcss-kms.h" + +struct dcss_drv { + struct dcss_dev *dcss; + struct dcss_kms_dev *kms; +}; + +struct dcss_dev *dcss_drv_dev_to_dcss(struct device *dev) +{ + struct dcss_drv *mdrv = dev_get_drvdata(dev); + + return mdrv ? mdrv->dcss : NULL; +} + +struct drm_device *dcss_drv_dev_to_drm(struct device *dev) +{ + struct dcss_drv *mdrv = dev_get_drvdata(dev); + + return mdrv ? &mdrv->kms->base : NULL; +} + +static int dcss_drv_platform_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *remote; + struct dcss_drv *mdrv; + int err = 0; + bool hdmi_output = true; + + if (!dev->of_node) + return -ENODEV; + + remote = of_graph_get_remote_node(dev->of_node, 0, 0); + if (!remote) + return -ENODEV; + + hdmi_output = !of_device_is_compatible(remote, "fsl,imx8mq-nwl-dsi"); + + of_node_put(remote); + + mdrv = kzalloc(sizeof(*mdrv), GFP_KERNEL); + if (!mdrv) + return -ENOMEM; + + mdrv->dcss = dcss_dev_create(dev, hdmi_output); + if (IS_ERR(mdrv->dcss)) { + err = PTR_ERR(mdrv->dcss); + goto err; + } + + dev_set_drvdata(dev, mdrv); + + mdrv->kms = dcss_kms_attach(mdrv->dcss); + if (IS_ERR(mdrv->kms)) { + err = PTR_ERR(mdrv->kms); + goto dcss_shutoff; + } + + return 0; + +dcss_shutoff: + dcss_dev_destroy(mdrv->dcss); + + dev_set_drvdata(dev, NULL); + +err: + kfree(mdrv); + return err; +} + +static int dcss_drv_platform_remove(struct platform_device *pdev) +{ + struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev); + + if (!mdrv) + return 0; + + dcss_kms_detach(mdrv->kms); + dcss_dev_destroy(mdrv->dcss); + + dev_set_drvdata(&pdev->dev, NULL); + + kfree(mdrv); + + return 0; +} + +static struct dcss_type_data dcss_types[] = { + [DCSS_IMX8MQ] = { + .name = "DCSS_IMX8MQ", + .blkctl_ofs = 0x2F000, + .ctxld_ofs = 0x23000, + .dtg_ofs = 0x20000, + .scaler_ofs = 0x1C000, + .ss_ofs = 0x1B000, + .dpr_ofs = 0x18000, + }, +}; + +static const struct of_device_id dcss_of_match[] = { + { .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], }, + {}, +}; + +MODULE_DEVICE_TABLE(of, dcss_of_match); + +static const struct dev_pm_ops dcss_dev_pm = { + SET_SYSTEM_SLEEP_PM_OPS(dcss_dev_suspend, dcss_dev_resume) + SET_RUNTIME_PM_OPS(dcss_dev_runtime_suspend, + dcss_dev_runtime_resume, NULL) +}; + +static struct platform_driver dcss_platform_driver = { + .probe = dcss_drv_platform_probe, + .remove = dcss_drv_platform_remove, + .driver = { + .name = "imx-dcss", + .of_match_table = dcss_of_match, + .pm = &dcss_dev_pm, + }, +}; + +module_platform_driver(dcss_platform_driver); + +MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>"); +MODULE_DESCRIPTION("DCSS driver for i.MX8MQ"); +MODULE_LICENSE("GPL v2"); |