Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0+
/*
 * Freescale i.MX drm driver
 *
 * Copyright (C) 2011 Sascha Hauer, Pengutronix
 */
 
#include <linux/component.h>
#include <linux/device.h>
#include <linux/dma-buf.h>
#include <linux/module.h>
#include <linux/platform_device.h>
 
#include <video/imx-ipu-v3.h>
 
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_of.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
 
#include "imx-drm.h"
#include "ipuv3-plane.h"
 
#define MAX_CRTC	4
 
static int legacyfb_depth = 16;
module_param(legacyfb_depth, int, 0444);
 
DEFINE_DRM_GEM_CMA_FOPS(imx_drm_driver_fops);
 
void imx_drm_connector_destroy(struct drm_connector *connector)
{
<------>drm_connector_unregister(connector);
<------>drm_connector_cleanup(connector);
}
EXPORT_SYMBOL_GPL(imx_drm_connector_destroy);
 
static int imx_drm_atomic_check(struct drm_device *dev,
<------><------><------><------>struct drm_atomic_state *state)
{
<------>int ret;
 
<------>ret = drm_atomic_helper_check(dev, state);
<------>if (ret)
<------><------>return ret;
 
<------>/*
<------> * Check modeset again in case crtc_state->mode_changed is
<------> * updated in plane's ->atomic_check callback.
<------> */
<------>ret = drm_atomic_helper_check_modeset(dev, state);
<------>if (ret)
<------><------>return ret;
 
<------>/* Assign PRG/PRE channels and check if all constrains are satisfied. */
<------>ret = ipu_planes_assign_pre(dev, state);
<------>if (ret)
<------><------>return ret;
 
<------>return ret;
}
 
static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
<------>.fb_create = drm_gem_fb_create,
<------>.atomic_check = imx_drm_atomic_check,
<------>.atomic_commit = drm_atomic_helper_commit,
};
 
static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state)
{
<------>struct drm_device *dev = state->dev;
<------>struct drm_plane *plane;
<------>struct drm_plane_state *old_plane_state, *new_plane_state;
<------>bool plane_disabling = false;
<------>int i;
 
<------>drm_atomic_helper_commit_modeset_disables(dev, state);
 
<------>drm_atomic_helper_commit_planes(dev, state,
<------><------><------><------>DRM_PLANE_COMMIT_ACTIVE_ONLY |
<------><------><------><------>DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET);
 
<------>drm_atomic_helper_commit_modeset_enables(dev, state);
 
<------>for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
<------><------>if (drm_atomic_plane_disabling(old_plane_state, new_plane_state))
<------><------><------>plane_disabling = true;
<------>}
 
<------>/*
<------> * The flip done wait is only strictly required by imx-drm if a deferred
<------> * plane disable is in-flight. As the core requires blocking commits
<------> * to wait for the flip it is done here unconditionally. This keeps the
<------> * workitem around a bit longer than required for the majority of
<------> * non-blocking commits, but we accept that for the sake of simplicity.
<------> */
<------>drm_atomic_helper_wait_for_flip_done(dev, state);
 
<------>if (plane_disabling) {
<------><------>for_each_old_plane_in_state(state, plane, old_plane_state, i)
<------><------><------>ipu_plane_disable_deferred(plane);
 
<------>}
 
<------>drm_atomic_helper_commit_hw_done(state);
}
 
static const struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = {
<------>.atomic_commit_tail = imx_drm_atomic_commit_tail,
};
 
 
int imx_drm_encoder_parse_of(struct drm_device *drm,
<------>struct drm_encoder *encoder, struct device_node *np)
{
<------>uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np);
 
<------>/*
<------> * If we failed to find the CRTC(s) which this encoder is
<------> * supposed to be connected to, it's because the CRTC has
<------> * not been registered yet.  Defer probing, and hope that
<------> * the required CRTC is added later.
<------> */
<------>if (crtc_mask == 0)
<------><------>return -EPROBE_DEFER;
 
<------>encoder->possible_crtcs = crtc_mask;
 
<------>/* FIXME: cloning support not clear, disable it all for now */
<------>encoder->possible_clones = 0;
 
<------>return 0;
}
EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of);
 
static const struct drm_ioctl_desc imx_drm_ioctls[] = {
<------>/* none so far */
};
 
static struct drm_driver imx_drm_driver = {
<------>.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
<------>DRM_GEM_CMA_DRIVER_OPS,
<------>.ioctls			= imx_drm_ioctls,
<------>.num_ioctls		= ARRAY_SIZE(imx_drm_ioctls),
<------>.fops			= &imx_drm_driver_fops,
<------>.name			= "imx-drm",
<------>.desc			= "i.MX DRM graphics",
<------>.date			= "20120507",
<------>.major			= 1,
<------>.minor			= 0,
<------>.patchlevel		= 0,
};
 
static int compare_of(struct device *dev, void *data)
{
<------>struct device_node *np = data;
 
<------>/* Special case for DI, dev->of_node may not be set yet */
<------>if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) {
<------><------>struct ipu_client_platformdata *pdata = dev->platform_data;
 
<------><------>return pdata->of_node == np;
<------>}
 
<------>/* Special case for LDB, one device for two channels */
<------>if (of_node_name_eq(np, "lvds-channel")) {
<------><------>np = of_get_parent(np);
<------><------>of_node_put(np);
<------>}
 
<------>return dev->of_node == np;
}
 
static int imx_drm_bind(struct device *dev)
{
<------>struct drm_device *drm;
<------>int ret;
 
<------>drm = drm_dev_alloc(&imx_drm_driver, dev);
<------>if (IS_ERR(drm))
<------><------>return PTR_ERR(drm);
 
<------>/*
<------> * enable drm irq mode.
<------> * - with irq_enabled = true, we can use the vblank feature.
<------> *
<------> * P.S. note that we wouldn't use drm irq handler but
<------> *      just specific driver own one instead because
<------> *      drm framework supports only one irq handler and
<------> *      drivers can well take care of their interrupts
<------> */
<------>drm->irq_enabled = true;
 
<------>/*
<------> * set max width and height as default value(4096x4096).
<------> * this value would be used to check framebuffer size limitation
<------> * at drm_mode_addfb().
<------> */
<------>drm->mode_config.min_width = 1;
<------>drm->mode_config.min_height = 1;
<------>drm->mode_config.max_width = 4096;
<------>drm->mode_config.max_height = 4096;
<------>drm->mode_config.funcs = &imx_drm_mode_config_funcs;
<------>drm->mode_config.helper_private = &imx_drm_mode_config_helpers;
<------>drm->mode_config.allow_fb_modifiers = true;
<------>drm->mode_config.normalize_zpos = true;
 
<------>ret = drmm_mode_config_init(drm);
<------>if (ret)
<------><------>goto err_kms;
 
<------>ret = drm_vblank_init(drm, MAX_CRTC);
<------>if (ret)
<------><------>goto err_kms;
 
<------>dev_set_drvdata(dev, drm);
 
<------>/* Now try and bind all our sub-components */
<------>ret = component_bind_all(dev, drm);
<------>if (ret)
<------><------>goto err_kms;
 
<------>drm_mode_config_reset(drm);
 
<------>/*
<------> * All components are now initialised, so setup the fb helper.
<------> * The fb helper takes copies of key hardware information, so the
<------> * crtcs/connectors/encoders must not change after this point.
<------> */
<------>if (legacyfb_depth != 16 && legacyfb_depth != 32) {
<------><------>dev_warn(dev, "Invalid legacyfb_depth.  Defaulting to 16bpp\n");
<------><------>legacyfb_depth = 16;
<------>}
 
<------>drm_kms_helper_poll_init(drm);
 
<------>ret = drm_dev_register(drm, 0);
<------>if (ret)
<------><------>goto err_poll_fini;
 
<------>drm_fbdev_generic_setup(drm, legacyfb_depth);
 
<------>return 0;
 
err_poll_fini:
<------>drm_kms_helper_poll_fini(drm);
<------>component_unbind_all(drm->dev, drm);
err_kms:
<------>drm_dev_put(drm);
 
<------>return ret;
}
 
static void imx_drm_unbind(struct device *dev)
{
<------>struct drm_device *drm = dev_get_drvdata(dev);
 
<------>drm_dev_unregister(drm);
 
<------>drm_kms_helper_poll_fini(drm);
 
<------>component_unbind_all(drm->dev, drm);
 
<------>drm_dev_put(drm);
 
<------>dev_set_drvdata(dev, NULL);
}
 
static const struct component_master_ops imx_drm_ops = {
<------>.bind = imx_drm_bind,
<------>.unbind = imx_drm_unbind,
};
 
static int imx_drm_platform_probe(struct platform_device *pdev)
{
<------>int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops);
 
<------>if (!ret)
<------><------>ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
 
<------>return ret;
}
 
static int imx_drm_platform_remove(struct platform_device *pdev)
{
<------>component_master_del(&pdev->dev, &imx_drm_ops);
<------>return 0;
}
 
#ifdef CONFIG_PM_SLEEP
static int imx_drm_suspend(struct device *dev)
{
<------>struct drm_device *drm_dev = dev_get_drvdata(dev);
 
<------>return drm_mode_config_helper_suspend(drm_dev);
}
 
static int imx_drm_resume(struct device *dev)
{
<------>struct drm_device *drm_dev = dev_get_drvdata(dev);
 
<------>return drm_mode_config_helper_resume(drm_dev);
}
#endif
 
static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume);
 
static const struct of_device_id imx_drm_dt_ids[] = {
<------>{ .compatible = "fsl,imx-display-subsystem", },
<------>{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, imx_drm_dt_ids);
 
static struct platform_driver imx_drm_pdrv = {
<------>.probe		= imx_drm_platform_probe,
<------>.remove		= imx_drm_platform_remove,
<------>.driver		= {
<------><------>.name	= "imx-drm",
<------><------>.pm	= &imx_drm_pm_ops,
<------><------>.of_match_table = imx_drm_dt_ids,
<------>},
};
 
static struct platform_driver * const drivers[] = {
<------>&imx_drm_pdrv,
<------>&ipu_drm_driver,
};
 
static int __init imx_drm_init(void)
{
<------>return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
module_init(imx_drm_init);
 
static void __exit imx_drm_exit(void)
{
<------>platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
module_exit(imx_drm_exit);
 
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX drm driver core");
MODULE_LICENSE("GPL");