2 * Exynos DRM Parallel output support.
4 * Copyright (c) 2014 Samsung Electronics Co., Ltd
6 * Contacts: Andrzej Hajda <a.hajda@samsung.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
14 #include <drm/drm_crtc_helper.h>
15 #include <drm/drm_panel.h>
16 #include <drm/drm_atomic_helper.h>
18 #include <linux/of_graph.h>
19 #include <linux/regulator/consumer.h>
21 #include <video/of_videomode.h>
22 #include <video/videomode.h>
24 #include "exynos_drm_crtc.h"
27 struct drm_encoder encoder;
29 struct device_node *panel_node;
31 struct drm_panel *panel;
32 struct drm_connector connector;
37 #define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector)
39 static inline struct exynos_dpi *encoder_to_dpi(struct drm_encoder *e)
41 return container_of(e, struct exynos_dpi, encoder);
44 static enum drm_connector_status
45 exynos_dpi_detect(struct drm_connector *connector, bool force)
47 struct exynos_dpi *ctx = connector_to_dpi(connector);
49 if (ctx->panel && !ctx->panel->connector)
50 drm_panel_attach(ctx->panel, &ctx->connector);
52 return connector_status_connected;
55 static void exynos_dpi_connector_destroy(struct drm_connector *connector)
57 drm_connector_unregister(connector);
58 drm_connector_cleanup(connector);
61 static const struct drm_connector_funcs exynos_dpi_connector_funcs = {
62 .dpms = drm_atomic_helper_connector_dpms,
63 .detect = exynos_dpi_detect,
64 .fill_modes = drm_helper_probe_single_connector_modes,
65 .destroy = exynos_dpi_connector_destroy,
66 .reset = drm_atomic_helper_connector_reset,
67 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
68 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
71 static int exynos_dpi_get_modes(struct drm_connector *connector)
73 struct exynos_dpi *ctx = connector_to_dpi(connector);
75 /* fimd timings gets precedence over panel modes */
77 struct drm_display_mode *mode;
79 mode = drm_mode_create(connector->dev);
81 DRM_ERROR("failed to create a new display mode\n");
84 drm_display_mode_from_videomode(ctx->vm, mode);
85 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
86 drm_mode_probed_add(connector, mode);
91 return ctx->panel->funcs->get_modes(ctx->panel);
96 static struct drm_encoder *
97 exynos_dpi_best_encoder(struct drm_connector *connector)
99 struct exynos_dpi *ctx = connector_to_dpi(connector);
101 return &ctx->encoder;
104 static const struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = {
105 .get_modes = exynos_dpi_get_modes,
106 .best_encoder = exynos_dpi_best_encoder,
109 static int exynos_dpi_create_connector(struct drm_encoder *encoder)
111 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
112 struct drm_connector *connector = &ctx->connector;
115 connector->polled = DRM_CONNECTOR_POLL_HPD;
117 ret = drm_connector_init(encoder->dev, connector,
118 &exynos_dpi_connector_funcs,
119 DRM_MODE_CONNECTOR_VGA);
121 DRM_ERROR("failed to initialize connector with drm\n");
125 drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs);
126 drm_connector_register(connector);
127 drm_mode_connector_attach_encoder(connector, encoder);
132 static void exynos_dpi_mode_set(struct drm_encoder *encoder,
133 struct drm_display_mode *mode,
134 struct drm_display_mode *adjusted_mode)
138 static void exynos_dpi_enable(struct drm_encoder *encoder)
140 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
143 drm_panel_prepare(ctx->panel);
144 drm_panel_enable(ctx->panel);
148 static void exynos_dpi_disable(struct drm_encoder *encoder)
150 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
153 drm_panel_disable(ctx->panel);
154 drm_panel_unprepare(ctx->panel);
158 static const struct drm_encoder_helper_funcs exynos_dpi_encoder_helper_funcs = {
159 .mode_set = exynos_dpi_mode_set,
160 .enable = exynos_dpi_enable,
161 .disable = exynos_dpi_disable,
164 static const struct drm_encoder_funcs exynos_dpi_encoder_funcs = {
165 .destroy = drm_encoder_cleanup,
176 static struct device_node *exynos_dpi_of_find_panel_node(struct device *dev)
178 struct device_node *np, *ep;
180 ep = of_graph_get_endpoint_by_regs(dev->of_node, FIMD_PORT_RGB, 0);
184 np = of_graph_get_remote_port_parent(ep);
190 static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
192 struct device *dev = ctx->dev;
193 struct device_node *dn = dev->of_node;
194 struct device_node *np;
196 ctx->panel_node = exynos_dpi_of_find_panel_node(dev);
198 np = of_get_child_by_name(dn, "display-timings");
200 struct videomode *vm;
205 vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL);
209 ret = of_get_videomode(dn, vm, 0);
220 if (!ctx->panel_node)
226 int exynos_dpi_bind(struct drm_device *dev, struct drm_encoder *encoder)
230 ret = exynos_drm_crtc_get_pipe_from_type(dev, EXYNOS_DISPLAY_TYPE_LCD);
234 encoder->possible_crtcs = 1 << ret;
236 DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
238 drm_encoder_init(dev, encoder, &exynos_dpi_encoder_funcs,
239 DRM_MODE_ENCODER_TMDS, NULL);
241 drm_encoder_helper_add(encoder, &exynos_dpi_encoder_helper_funcs);
243 ret = exynos_dpi_create_connector(encoder);
245 DRM_ERROR("failed to create connector ret = %d\n", ret);
246 drm_encoder_cleanup(encoder);
253 struct drm_encoder *exynos_dpi_probe(struct device *dev)
255 struct exynos_dpi *ctx;
258 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
260 return ERR_PTR(-ENOMEM);
264 ret = exynos_dpi_parse_dt(ctx);
266 devm_kfree(dev, ctx);
270 if (ctx->panel_node) {
271 ctx->panel = of_drm_find_panel(ctx->panel_node);
273 return ERR_PTR(-EPROBE_DEFER);
276 return &ctx->encoder;
279 int exynos_dpi_remove(struct drm_encoder *encoder)
281 struct exynos_dpi *ctx = encoder_to_dpi(encoder);
283 exynos_dpi_disable(&ctx->encoder);
286 drm_panel_detach(ctx->panel);