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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge_connector.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "dcss-dev.h"
#include "dcss-kms.h"
DEFINE_DRM_GEM_CMA_FOPS(dcss_cma_fops);
static const struct drm_mode_config_funcs dcss_drm_mode_config_funcs = {
.fb_create = drm_gem_fb_create,
.output_poll_changed = drm_fb_helper_output_poll_changed,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
static const struct drm_driver dcss_kms_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
DRM_GEM_CMA_DRIVER_OPS,
.fops = &dcss_cma_fops,
.name = "imx-dcss",
.desc = "i.MX8MQ Display Subsystem",
.date = "20190917",
.major = 1,
.minor = 0,
.patchlevel = 0,
};
static const struct drm_mode_config_helper_funcs dcss_mode_config_helpers = {
.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};
static void dcss_kms_mode_config_init(struct dcss_kms_dev *kms)
{
struct drm_mode_config *config = &kms->base.mode_config;
drm_mode_config_init(&kms->base);
config->min_width = 1;
config->min_height = 1;
config->max_width = 4096;
config->max_height = 4096;
config->allow_fb_modifiers = true;
config->normalize_zpos = true;
config->funcs = &dcss_drm_mode_config_funcs;
config->helper_private = &dcss_mode_config_helpers;
}
static const struct drm_encoder_funcs dcss_kms_simple_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static int dcss_kms_bridge_connector_init(struct dcss_kms_dev *kms)
{
struct drm_device *ddev = &kms->base;
struct drm_encoder *encoder = &kms->encoder;
struct drm_crtc *crtc = (struct drm_crtc *)&kms->crtc;
struct drm_panel *panel;
struct drm_bridge *bridge;
int ret;
ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0,
&panel, &bridge);
if (ret)
return ret;
if (!bridge) {
dev_err(ddev->dev, "No bridge found %d.\n", ret);
return -ENODEV;
}
encoder->possible_crtcs = drm_crtc_mask(crtc);
ret = drm_encoder_init(&kms->base, encoder,
&dcss_kms_simple_encoder_funcs,
DRM_MODE_ENCODER_NONE, NULL);
if (ret) {
dev_err(ddev->dev, "Failed initializing encoder %d.\n", ret);
return ret;
}
ret = drm_bridge_attach(encoder, bridge, NULL,
DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret < 0) {
dev_err(ddev->dev, "Unable to attach bridge %pOF\n",
bridge->of_node);
return ret;
}
kms->connector = drm_bridge_connector_init(ddev, encoder);
if (IS_ERR(kms->connector)) {
dev_err(ddev->dev, "Unable to create bridge connector.\n");
return PTR_ERR(kms->connector);
}
drm_connector_attach_encoder(kms->connector, encoder);
return 0;
}
struct dcss_kms_dev *dcss_kms_attach(struct dcss_dev *dcss)
{
struct dcss_kms_dev *kms;
struct drm_device *drm;
struct dcss_crtc *crtc;
int ret;
kms = devm_drm_dev_alloc(dcss->dev, &dcss_kms_driver,
struct dcss_kms_dev, base);
if (IS_ERR(kms))
return kms;
drm = &kms->base;
crtc = &kms->crtc;
drm->dev_private = dcss;
dcss_kms_mode_config_init(kms);
ret = drm_vblank_init(drm, 1);
if (ret)
goto cleanup_mode_config;
drm->irq_enabled = true;
ret = dcss_kms_bridge_connector_init(kms);
if (ret)
goto cleanup_mode_config;
ret = dcss_crtc_init(crtc, drm);
if (ret)
goto cleanup_mode_config;
drm_mode_config_reset(drm);
drm_kms_helper_poll_init(drm);
drm_bridge_connector_enable_hpd(kms->connector);
ret = drm_dev_register(drm, 0);
if (ret)
goto cleanup_crtc;
drm_fbdev_generic_setup(drm, 32);
return kms;
cleanup_crtc:
drm_bridge_connector_disable_hpd(kms->connector);
drm_kms_helper_poll_fini(drm);
dcss_crtc_deinit(crtc, drm);
cleanup_mode_config:
drm_mode_config_cleanup(drm);
drm->dev_private = NULL;
return ERR_PTR(ret);
}
void dcss_kms_detach(struct dcss_kms_dev *kms)
{
struct drm_device *drm = &kms->base;
drm_dev_unregister(drm);
drm_bridge_connector_disable_hpd(kms->connector);
drm_kms_helper_poll_fini(drm);
drm_atomic_helper_shutdown(drm);
drm_crtc_vblank_off(&kms->crtc.base);
drm->irq_enabled = false;
drm_mode_config_cleanup(drm);
dcss_crtc_deinit(&kms->crtc, drm);
drm->dev_private = NULL;
}
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