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>
17 #include <linux/regulator/consumer.h>
19 #include <video/of_videomode.h>
20 #include <video/videomode.h>
22 #include "exynos_drm_drv.h"
26 struct device_node *panel_node;
28 struct drm_panel *panel;
29 struct drm_connector connector;
30 struct drm_encoder *encoder;
36 #define connector_to_dpi(c) container_of(c, struct exynos_dpi, connector)
38 static enum drm_connector_status
39 exynos_dpi_detect(struct drm_connector *connector, bool force)
41 struct exynos_dpi *ctx = connector_to_dpi(connector);
43 /* panels supported only by boot-loader are always connected */
45 return connector_status_connected;
48 ctx->panel = of_drm_find_panel(ctx->panel_node);
50 drm_panel_attach(ctx->panel, &ctx->connector);
54 return connector_status_connected;
56 return connector_status_disconnected;
59 static void exynos_dpi_connector_destroy(struct drm_connector *connector)
61 drm_sysfs_connector_remove(connector);
62 drm_connector_cleanup(connector);
65 static struct drm_connector_funcs exynos_dpi_connector_funcs = {
66 .dpms = drm_helper_connector_dpms,
67 .detect = exynos_dpi_detect,
68 .fill_modes = drm_helper_probe_single_connector_modes,
69 .destroy = exynos_dpi_connector_destroy,
72 static int exynos_dpi_get_modes(struct drm_connector *connector)
74 struct exynos_dpi *ctx = connector_to_dpi(connector);
76 /* fimd timings gets precedence over panel modes */
78 struct drm_display_mode *mode;
80 mode = drm_mode_create(connector->dev);
82 DRM_ERROR("failed to create a new display mode\n");
85 drm_display_mode_from_videomode(ctx->vm, mode);
86 mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
87 drm_mode_probed_add(connector, mode);
92 return ctx->panel->funcs->get_modes(ctx->panel);
97 static int exynos_dpi_mode_valid(struct drm_connector *connector,
98 struct drm_display_mode *mode)
103 static struct drm_encoder *
104 exynos_dpi_best_encoder(struct drm_connector *connector)
106 struct exynos_dpi *ctx = connector_to_dpi(connector);
111 static struct drm_connector_helper_funcs exynos_dpi_connector_helper_funcs = {
112 .get_modes = exynos_dpi_get_modes,
113 .mode_valid = exynos_dpi_mode_valid,
114 .best_encoder = exynos_dpi_best_encoder,
117 static int exynos_dpi_create_connector(struct exynos_drm_display *display,
118 struct drm_encoder *encoder)
120 struct exynos_dpi *ctx = display->ctx;
121 struct drm_connector *connector = &ctx->connector;
124 ctx->encoder = encoder;
127 connector->polled = DRM_CONNECTOR_POLL_CONNECT;
129 connector->polled = DRM_CONNECTOR_POLL_HPD;
131 ret = drm_connector_init(encoder->dev, connector,
132 &exynos_dpi_connector_funcs,
133 DRM_MODE_CONNECTOR_VGA);
135 DRM_ERROR("failed to initialize connector with drm\n");
139 drm_connector_helper_add(connector, &exynos_dpi_connector_helper_funcs);
140 drm_sysfs_connector_add(connector);
141 drm_mode_connector_attach_encoder(connector, encoder);
146 static void exynos_dpi_poweron(struct exynos_dpi *ctx)
149 drm_panel_enable(ctx->panel);
152 static void exynos_dpi_poweroff(struct exynos_dpi *ctx)
155 drm_panel_disable(ctx->panel);
158 static void exynos_dpi_dpms(struct exynos_drm_display *display, int mode)
160 struct exynos_dpi *ctx = display->ctx;
163 case DRM_MODE_DPMS_ON:
164 if (ctx->dpms_mode != DRM_MODE_DPMS_ON)
165 exynos_dpi_poweron(ctx);
167 case DRM_MODE_DPMS_STANDBY:
168 case DRM_MODE_DPMS_SUSPEND:
169 case DRM_MODE_DPMS_OFF:
170 if (ctx->dpms_mode == DRM_MODE_DPMS_ON)
171 exynos_dpi_poweroff(ctx);
176 ctx->dpms_mode = mode;
179 static struct exynos_drm_display_ops exynos_dpi_display_ops = {
180 .create_connector = exynos_dpi_create_connector,
181 .dpms = exynos_dpi_dpms
184 static struct exynos_drm_display exynos_dpi_display = {
185 .type = EXYNOS_DISPLAY_TYPE_LCD,
186 .ops = &exynos_dpi_display_ops,
189 /* of_* functions will be removed after merge of of_graph patches */
190 static struct device_node *
191 of_get_child_by_name_reg(struct device_node *parent, const char *name, u32 reg)
193 struct device_node *np;
195 for_each_child_of_node(parent, np) {
198 if (!np->name || of_node_cmp(np->name, name))
201 if (of_property_read_u32(np, "reg", &r) < 0)
211 static struct device_node *of_graph_get_port_by_reg(struct device_node *parent,
214 struct device_node *ports, *port;
216 ports = of_get_child_by_name(parent, "ports");
220 port = of_get_child_by_name_reg(parent, "port", reg);
227 static struct device_node *
228 of_graph_get_endpoint_by_reg(struct device_node *port, u32 reg)
230 return of_get_child_by_name_reg(port, "endpoint", reg);
233 static struct device_node *
234 of_graph_get_remote_port_parent(const struct device_node *node)
236 struct device_node *np;
239 np = of_parse_phandle(node, "remote-endpoint", 0);
241 /* Walk 3 levels up only if there is 'ports' node. */
242 for (depth = 3; depth && np; depth--) {
243 np = of_get_next_parent(np);
244 if (depth == 2 && of_node_cmp(np->name, "ports"))
258 static struct device_node *exynos_dpi_of_find_panel_node(struct device *dev)
260 struct device_node *np, *ep;
262 np = of_graph_get_port_by_reg(dev->of_node, FIMD_PORT_RGB);
266 ep = of_graph_get_endpoint_by_reg(np, 0);
271 np = of_graph_get_remote_port_parent(ep);
277 static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
279 struct device *dev = ctx->dev;
280 struct device_node *dn = dev->of_node;
281 struct device_node *np;
283 ctx->panel_node = exynos_dpi_of_find_panel_node(dev);
285 np = of_get_child_by_name(dn, "display-timings");
287 struct videomode *vm;
292 vm = devm_kzalloc(dev, sizeof(*ctx->vm), GFP_KERNEL);
296 ret = of_get_videomode(dn, vm, 0);
305 if (!ctx->panel_node)
311 int exynos_dpi_probe(struct device *dev)
313 struct exynos_dpi *ctx;
316 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
321 exynos_dpi_display.ctx = ctx;
322 ctx->dpms_mode = DRM_MODE_DPMS_OFF;
324 ret = exynos_dpi_parse_dt(ctx);
328 exynos_drm_display_register(&exynos_dpi_display);
333 int exynos_dpi_remove(struct device *dev)
335 exynos_dpi_dpms(&exynos_dpi_display, DRM_MODE_DPMS_OFF);
336 exynos_drm_display_unregister(&exynos_dpi_display);