2 * i.MX drm driver - parallel display implementation
4 * Copyright (C) 2012 Sascha Hauer, Pengutronix
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #include <linux/component.h>
17 #include <linux/module.h>
19 #include <drm/drm_fb_helper.h>
20 #include <drm/drm_crtc_helper.h>
21 #include <drm/drm_panel.h>
22 #include <linux/videodev2.h>
23 #include <video/of_display_timing.h>
27 #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
28 #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)
30 struct imx_parallel_display {
31 struct drm_connector connector;
32 struct drm_encoder encoder;
36 u32 interface_pix_fmt;
38 struct drm_display_mode mode;
39 struct drm_panel *panel;
42 static enum drm_connector_status imx_pd_connector_detect(
43 struct drm_connector *connector, bool force)
45 return connector_status_connected;
48 static int imx_pd_connector_get_modes(struct drm_connector *connector)
50 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
51 struct device_node *np = imxpd->dev->of_node;
54 if (imxpd->panel && imxpd->panel->funcs &&
55 imxpd->panel->funcs->get_modes) {
56 num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
62 drm_mode_connector_update_edid_property(connector, imxpd->edid);
63 num_modes = drm_add_edid_modes(connector, imxpd->edid);
66 if (imxpd->mode_valid) {
67 struct drm_display_mode *mode = drm_mode_create(connector->dev);
71 drm_mode_copy(mode, &imxpd->mode);
72 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
73 drm_mode_probed_add(connector, mode);
78 struct drm_display_mode *mode = drm_mode_create(connector->dev);
82 of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
83 drm_mode_copy(mode, &imxpd->mode);
84 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
85 drm_mode_probed_add(connector, mode);
92 static struct drm_encoder *imx_pd_connector_best_encoder(
93 struct drm_connector *connector)
95 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
97 return &imxpd->encoder;
100 static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
102 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
104 if (mode != DRM_MODE_DPMS_ON)
105 drm_panel_disable(imxpd->panel);
107 drm_panel_enable(imxpd->panel);
110 static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
111 const struct drm_display_mode *mode,
112 struct drm_display_mode *adjusted_mode)
117 static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
119 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
121 imx_drm_panel_format(encoder, imxpd->interface_pix_fmt);
124 static void imx_pd_encoder_commit(struct drm_encoder *encoder)
126 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
128 drm_panel_prepare(imxpd->panel);
129 drm_panel_enable(imxpd->panel);
132 static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
133 struct drm_display_mode *mode,
134 struct drm_display_mode *adjusted_mode)
138 static void imx_pd_encoder_disable(struct drm_encoder *encoder)
140 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
142 drm_panel_disable(imxpd->panel);
143 drm_panel_unprepare(imxpd->panel);
146 static struct drm_connector_funcs imx_pd_connector_funcs = {
147 .dpms = drm_helper_connector_dpms,
148 .fill_modes = drm_helper_probe_single_connector_modes,
149 .detect = imx_pd_connector_detect,
150 .destroy = imx_drm_connector_destroy,
153 static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
154 .get_modes = imx_pd_connector_get_modes,
155 .best_encoder = imx_pd_connector_best_encoder,
158 static struct drm_encoder_funcs imx_pd_encoder_funcs = {
159 .destroy = imx_drm_encoder_destroy,
162 static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
163 .dpms = imx_pd_encoder_dpms,
164 .mode_fixup = imx_pd_encoder_mode_fixup,
165 .prepare = imx_pd_encoder_prepare,
166 .commit = imx_pd_encoder_commit,
167 .mode_set = imx_pd_encoder_mode_set,
168 .disable = imx_pd_encoder_disable,
171 static int imx_pd_register(struct drm_device *drm,
172 struct imx_parallel_display *imxpd)
176 ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder,
177 imxpd->dev->of_node);
181 /* set the connector's dpms to OFF so that
182 * drm_helper_connector_dpms() won't return
183 * immediately since the current state is ON
186 imxpd->connector.dpms = DRM_MODE_DPMS_OFF;
188 drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
189 drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
190 DRM_MODE_ENCODER_NONE);
192 drm_connector_helper_add(&imxpd->connector,
193 &imx_pd_connector_helper_funcs);
194 drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs,
195 DRM_MODE_CONNECTOR_VGA);
198 drm_panel_attach(imxpd->panel, &imxpd->connector);
200 drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);
202 imxpd->connector.encoder = &imxpd->encoder;
207 static int imx_pd_bind(struct device *dev, struct device *master, void *data)
209 struct drm_device *drm = data;
210 struct device_node *np = dev->of_node;
211 struct device_node *panel_node;
213 struct imx_parallel_display *imxpd;
217 imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
221 edidp = of_get_property(np, "edid", &imxpd->edid_len);
223 imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
225 ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
227 if (!strcmp(fmt, "rgb24"))
228 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24;
229 else if (!strcmp(fmt, "rgb565"))
230 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565;
231 else if (!strcmp(fmt, "bgr666"))
232 imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666;
233 else if (!strcmp(fmt, "lvds666"))
234 imxpd->interface_pix_fmt =
235 v4l2_fourcc('L', 'V', 'D', '6');
238 panel_node = of_parse_phandle(np, "fsl,panel", 0);
240 imxpd->panel = of_drm_find_panel(panel_node);
244 ret = imx_pd_register(drm, imxpd);
248 dev_set_drvdata(dev, imxpd);
253 static void imx_pd_unbind(struct device *dev, struct device *master,
256 struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
258 imxpd->encoder.funcs->destroy(&imxpd->encoder);
259 imxpd->connector.funcs->destroy(&imxpd->connector);
264 static const struct component_ops imx_pd_ops = {
266 .unbind = imx_pd_unbind,
269 static int imx_pd_probe(struct platform_device *pdev)
271 return component_add(&pdev->dev, &imx_pd_ops);
274 static int imx_pd_remove(struct platform_device *pdev)
276 component_del(&pdev->dev, &imx_pd_ops);
281 static const struct of_device_id imx_pd_dt_ids[] = {
282 { .compatible = "fsl,imx-parallel-display", },
285 MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
287 static struct platform_driver imx_pd_driver = {
288 .probe = imx_pd_probe,
289 .remove = imx_pd_remove,
291 .of_match_table = imx_pd_dt_ids,
292 .name = "imx-parallel-display",
296 module_platform_driver(imx_pd_driver);
298 MODULE_DESCRIPTION("i.MX parallel display driver");
299 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
300 MODULE_LICENSE("GPL");
301 MODULE_ALIAS("platform:imx-parallel-display");