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.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
21 #include <linux/component.h>
22 #include <linux/module.h>
24 #include <drm/drm_fb_helper.h>
25 #include <drm/drm_crtc_helper.h>
26 #include <drm/drm_panel.h>
27 #include <linux/videodev2.h>
28 #include <video/of_display_timing.h>
32 #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
33 #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)
35 struct imx_parallel_display {
36 struct drm_connector connector;
37 struct drm_encoder encoder;
41 u32 interface_pix_fmt;
43 struct drm_display_mode mode;
44 struct drm_panel *panel;
47 static enum drm_connector_status imx_pd_connector_detect(
48 struct drm_connector *connector, bool force)
50 return connector_status_connected;
53 static int imx_pd_connector_get_modes(struct drm_connector *connector)
55 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
56 struct device_node *np = imxpd->dev->of_node;
59 if (imxpd->panel && imxpd->panel->funcs &&
60 imxpd->panel->funcs->get_modes) {
61 num_modes = imxpd->panel->funcs->get_modes(imxpd->panel);
67 drm_mode_connector_update_edid_property(connector, imxpd->edid);
68 num_modes = drm_add_edid_modes(connector, imxpd->edid);
71 if (imxpd->mode_valid) {
72 struct drm_display_mode *mode = drm_mode_create(connector->dev);
76 drm_mode_copy(mode, &imxpd->mode);
77 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
78 drm_mode_probed_add(connector, mode);
83 struct drm_display_mode *mode = drm_mode_create(connector->dev);
87 of_get_drm_display_mode(np, &imxpd->mode, OF_USE_NATIVE_MODE);
88 drm_mode_copy(mode, &imxpd->mode);
89 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
90 drm_mode_probed_add(connector, mode);
97 static struct drm_encoder *imx_pd_connector_best_encoder(
98 struct drm_connector *connector)
100 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
102 return &imxpd->encoder;
105 static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
107 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
109 if (mode != DRM_MODE_DPMS_ON)
110 drm_panel_disable(imxpd->panel);
112 drm_panel_enable(imxpd->panel);
115 static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
116 const struct drm_display_mode *mode,
117 struct drm_display_mode *adjusted_mode)
122 static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
124 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
126 imx_drm_panel_format(encoder, imxpd->interface_pix_fmt);
129 static void imx_pd_encoder_commit(struct drm_encoder *encoder)
133 static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
134 struct drm_display_mode *mode,
135 struct drm_display_mode *adjusted_mode)
139 static void imx_pd_encoder_disable(struct drm_encoder *encoder)
143 static struct drm_connector_funcs imx_pd_connector_funcs = {
144 .dpms = drm_helper_connector_dpms,
145 .fill_modes = drm_helper_probe_single_connector_modes,
146 .detect = imx_pd_connector_detect,
147 .destroy = imx_drm_connector_destroy,
150 static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
151 .get_modes = imx_pd_connector_get_modes,
152 .best_encoder = imx_pd_connector_best_encoder,
155 static struct drm_encoder_funcs imx_pd_encoder_funcs = {
156 .destroy = imx_drm_encoder_destroy,
159 static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
160 .dpms = imx_pd_encoder_dpms,
161 .mode_fixup = imx_pd_encoder_mode_fixup,
162 .prepare = imx_pd_encoder_prepare,
163 .commit = imx_pd_encoder_commit,
164 .mode_set = imx_pd_encoder_mode_set,
165 .disable = imx_pd_encoder_disable,
168 static int imx_pd_register(struct drm_device *drm,
169 struct imx_parallel_display *imxpd)
173 ret = imx_drm_encoder_parse_of(drm, &imxpd->encoder,
174 imxpd->dev->of_node);
178 /* set the connector's dpms to OFF so that
179 * drm_helper_connector_dpms() won't return
180 * immediately since the current state is ON
183 imxpd->connector.dpms = DRM_MODE_DPMS_OFF;
185 drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
186 drm_encoder_init(drm, &imxpd->encoder, &imx_pd_encoder_funcs,
187 DRM_MODE_ENCODER_NONE);
189 drm_connector_helper_add(&imxpd->connector,
190 &imx_pd_connector_helper_funcs);
191 drm_connector_init(drm, &imxpd->connector, &imx_pd_connector_funcs,
192 DRM_MODE_CONNECTOR_VGA);
195 drm_panel_attach(imxpd->panel, &imxpd->connector);
197 drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);
199 imxpd->connector.encoder = &imxpd->encoder;
204 static int imx_pd_bind(struct device *dev, struct device *master, void *data)
206 struct drm_device *drm = data;
207 struct device_node *np = dev->of_node;
208 struct device_node *panel_node;
210 struct imx_parallel_display *imxpd;
214 imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
218 edidp = of_get_property(np, "edid", &imxpd->edid_len);
220 imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
222 ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
224 if (!strcmp(fmt, "rgb24"))
225 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24;
226 else if (!strcmp(fmt, "rgb565"))
227 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565;
228 else if (!strcmp(fmt, "bgr666"))
229 imxpd->interface_pix_fmt = V4L2_PIX_FMT_BGR666;
230 else if (!strcmp(fmt, "lvds666"))
231 imxpd->interface_pix_fmt =
232 v4l2_fourcc('L', 'V', 'D', '6');
235 panel_node = of_parse_phandle(np, "fsl,panel", 0);
237 imxpd->panel = of_drm_find_panel(panel_node);
241 ret = imx_pd_register(drm, imxpd);
245 dev_set_drvdata(dev, imxpd);
250 static void imx_pd_unbind(struct device *dev, struct device *master,
253 struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
255 imxpd->encoder.funcs->destroy(&imxpd->encoder);
256 imxpd->connector.funcs->destroy(&imxpd->connector);
259 static const struct component_ops imx_pd_ops = {
261 .unbind = imx_pd_unbind,
264 static int imx_pd_probe(struct platform_device *pdev)
266 return component_add(&pdev->dev, &imx_pd_ops);
269 static int imx_pd_remove(struct platform_device *pdev)
271 component_del(&pdev->dev, &imx_pd_ops);
275 static const struct of_device_id imx_pd_dt_ids[] = {
276 { .compatible = "fsl,imx-parallel-display", },
279 MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
281 static struct platform_driver imx_pd_driver = {
282 .probe = imx_pd_probe,
283 .remove = imx_pd_remove,
285 .of_match_table = imx_pd_dt_ids,
286 .name = "imx-parallel-display",
290 module_platform_driver(imx_pd_driver);
292 MODULE_DESCRIPTION("i.MX parallel display driver");
293 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
294 MODULE_LICENSE("GPL");
295 MODULE_ALIAS("platform:imx-parallel-display");