// SPDX-License-Identifier: GPL-2.0-only /* * Exynos DRM Parallel output support. * * Copyright (c) 2014 Samsung Electronics Co., Ltd * * Contacts: Andrzej Hajda <a.hajda@samsung.com> */ #include <linux/of.h> #include <linux/of_graph.h> #include <linux/regulator/consumer.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_panel.h> #include <drm/drm_print.h> #include <drm/drm_probe_helper.h> #include <drm/drm_simple_kms_helper.h> #include <video/of_videomode.h> #include <video/videomode.h> #include "exynos_drm_crtc.h" struct exynos_dpi { struct drm_encoder encoder; struct device *dev; struct device_node *panel_node; struct drm_panel *panel; struct drm_connector connector; struct videomode *vm; }; #define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector) static inline struct exynos_dpi *encoder_to_dpi(struct drm_encoder *e) { return container_of(e, struct exynos_dpi, encoder); } static enum drm_connector_status exynos_dpi_detect(struct drm_connector *connector, bool force) { return connector_status_connected; } static void exynos_dpi_connector_destroy(struct drm_connector *connector) { drm_connector_unregister(connector); drm_connector_cleanup(connector); } static const struct drm_connector_funcs exynos_dpi_connector_funcs = { .detect = exynos_dpi_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = exynos_dpi_connector_destroy, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static int exynos_dpi_get_modes(struct drm_connector *connector) { struct exynos_dpi *ctx = connector_to_dpi(connector); /* fimd timings gets precedence over panel modes */ if (ctx->vm) { struct drm_display_mode *mode; mode = drm_mode_create(connector->dev); if (!mode) { DRM_DEV_ERROR(ctx->dev, "failed to create a new display mode\n"); return 0; } drm_display_mode_from_videomode(ctx->vm, mode); mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; drm_mode_probed_add(connector, mode); return 1; } if (ctx->panel) return drm_panel_get_modes(ctx->panel, connector); return 0; } static const struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = { .get_modes = exynos_dpi_get_modes, }; static int exynos_dpi_create_connector(struct drm_encoder *encoder) { struct exynos_dpi *ctx = encoder_to_dpi(encoder); struct drm_connector *connector = &ctx->connector; int ret; connector->polled = DRM_CONNECTOR_POLL_HPD; ret = drm_connector_init(encoder->dev, connector, &exynos_dpi_connector_funcs, DRM_MODE_CONNECTOR_VGA); if (ret) { DRM_DEV_ERROR(ctx->dev, "failed to initialize connector with drm\n"); return ret; } drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs); drm_connector_attach_encoder(connector, encoder); return 0; } static void exynos_dpi_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { } static void exynos_dpi_enable(struct drm_encoder *encoder) { struct exynos_dpi *ctx = encoder_to_dpi(encoder); if (ctx->panel) { drm_panel_prepare(ctx->panel); drm_panel_enable(ctx->panel); } } static void exynos_dpi_disable(struct drm_encoder *encoder) { struct exynos_dpi *ctx = encoder_to_dpi(encoder); if (ctx->panel) { drm_panel_disable(ctx->panel); drm_panel_unprepare(ctx->panel); } } static const struct drm_encoder_helper_funcs exynos_dpi_encoder_helper_funcs = { .mode_set = exynos_dpi_mode_set, .enable = exynos_dpi_enable, .disable = exynos_dpi_disable, }; enum { FIMD_PORT_IN0, FIMD_PORT_IN1, FIMD_PORT_IN2, FIMD_PORT_RGB, FIMD_PORT_WRB, }; static int exynos_dpi_parse_dt(struct exynos_dpi *ctx) { struct device *dev = ctx->dev; struct device_node *dn = dev->of_node; struct device_node *np; ctx->panel_node = of_graph_get_remote_node(dn, FIMD_PORT_RGB, 0); np = of_get_child_by_name(dn, "display-timings"); if (np) { struct videomode *vm; int ret; of_node_put(np); vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL); if (!vm) return -ENOMEM; ret = of_get_videomode(dn, vm, 0); if (ret < 0) { devm_kfree(dev, vm); return ret; } ctx->vm = vm; return 0; } if (!ctx->panel_node) return -EINVAL; return 0; } int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder) { int ret; drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_TMDS); drm_encoder_helper_add(encoder, &exynos_dpi_encoder_helper_funcs); ret = exynos_drm_set_possible_crtcs(encoder, EXYNOS_DISPLAY_TYPE_LCD); if (ret < 0) return ret; ret = exynos_dpi_create_connector(encoder); if (ret) { DRM_DEV_ERROR(encoder_to_dpi(encoder)->dev, "failed to create connector ret = %d\n", ret); drm_encoder_cleanup(encoder); return ret; } return 0; } struct drm_encoder *exynos_dpi_probe(struct device *dev) { struct exynos_dpi *ctx; int ret; ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return ERR_PTR(-ENOMEM); ctx->dev = dev; ret = exynos_dpi_parse_dt(ctx); if (ret < 0) { devm_kfree(dev, ctx); return NULL; } if (ctx->panel_node) { ctx->panel = of_drm_find_panel(ctx->panel_node); if (IS_ERR(ctx->panel)) return ERR_CAST(ctx->panel); } return &ctx->encoder; } int exynos_dpi_remove(struct drm_encoder *encoder) { struct exynos_dpi *ctx = encoder_to_dpi(encoder); exynos_dpi_disable(&ctx->encoder); return 0; }