From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/imx/dcss/dcss-kms.c | 177 ++++++++++++++++++++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100644 drivers/gpu/drm/imx/dcss/dcss-kms.c (limited to 'drivers/gpu/drm/imx/dcss/dcss-kms.c') diff --git a/drivers/gpu/drm/imx/dcss/dcss-kms.c b/drivers/gpu/drm/imx/dcss/dcss-kms.c new file mode 100644 index 000000000..b4f82ebca --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-kms.c @@ -0,0 +1,177 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "dcss-dev.h" +#include "dcss-kms.h" + +DEFINE_DRM_GEM_DMA_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_DMA_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->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) + 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; + + 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); + + 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_mode_config_cleanup(drm); + dcss_crtc_deinit(&kms->crtc, drm); + drm->dev_private = NULL; +} -- cgit v1.2.3