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/module.h>
23 #include <drm/drm_fb_helper.h>
24 #include <drm/drm_crtc_helper.h>
25 #include <linux/videodev2.h>
26 #include <linux/pinctrl/consumer.h>
30 #define con_to_imxpd(x) container_of(x, struct imx_parallel_display, connector)
31 #define enc_to_imxpd(x) container_of(x, struct imx_parallel_display, encoder)
33 struct imx_parallel_display {
34 struct drm_connector connector;
35 struct imx_drm_connector *imx_drm_connector;
36 struct drm_encoder encoder;
37 struct imx_drm_encoder *imx_drm_encoder;
41 u32 interface_pix_fmt;
43 struct drm_display_mode mode;
46 static enum drm_connector_status imx_pd_connector_detect(
47 struct drm_connector *connector, bool force)
49 return connector_status_connected;
52 static void imx_pd_connector_destroy(struct drm_connector *connector)
54 /* do not free here */
57 static int imx_pd_connector_get_modes(struct drm_connector *connector)
59 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
63 drm_mode_connector_update_edid_property(connector, imxpd->edid);
64 num_modes = drm_add_edid_modes(connector, imxpd->edid);
67 if (imxpd->mode_valid) {
68 struct drm_display_mode *mode = drm_mode_create(connector->dev);
69 drm_mode_copy(mode, &imxpd->mode);
70 mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
71 drm_mode_probed_add(connector, mode);
78 static int imx_pd_connector_mode_valid(struct drm_connector *connector,
79 struct drm_display_mode *mode)
84 static struct drm_encoder *imx_pd_connector_best_encoder(
85 struct drm_connector *connector)
87 struct imx_parallel_display *imxpd = con_to_imxpd(connector);
89 return &imxpd->encoder;
92 static void imx_pd_encoder_dpms(struct drm_encoder *encoder, int mode)
96 static bool imx_pd_encoder_mode_fixup(struct drm_encoder *encoder,
97 const struct drm_display_mode *mode,
98 struct drm_display_mode *adjusted_mode)
103 static void imx_pd_encoder_prepare(struct drm_encoder *encoder)
105 struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
107 imx_drm_crtc_panel_format(encoder->crtc, DRM_MODE_ENCODER_NONE,
108 imxpd->interface_pix_fmt);
111 static void imx_pd_encoder_commit(struct drm_encoder *encoder)
115 static void imx_pd_encoder_mode_set(struct drm_encoder *encoder,
116 struct drm_display_mode *mode,
117 struct drm_display_mode *adjusted_mode)
121 static void imx_pd_encoder_disable(struct drm_encoder *encoder)
125 static void imx_pd_encoder_destroy(struct drm_encoder *encoder)
127 /* do not free here */
130 static struct drm_connector_funcs imx_pd_connector_funcs = {
131 .dpms = drm_helper_connector_dpms,
132 .fill_modes = drm_helper_probe_single_connector_modes,
133 .detect = imx_pd_connector_detect,
134 .destroy = imx_pd_connector_destroy,
137 static struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
138 .get_modes = imx_pd_connector_get_modes,
139 .best_encoder = imx_pd_connector_best_encoder,
140 .mode_valid = imx_pd_connector_mode_valid,
143 static struct drm_encoder_funcs imx_pd_encoder_funcs = {
144 .destroy = imx_pd_encoder_destroy,
147 static struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
148 .dpms = imx_pd_encoder_dpms,
149 .mode_fixup = imx_pd_encoder_mode_fixup,
150 .prepare = imx_pd_encoder_prepare,
151 .commit = imx_pd_encoder_commit,
152 .mode_set = imx_pd_encoder_mode_set,
153 .disable = imx_pd_encoder_disable,
156 static int imx_pd_register(struct imx_parallel_display *imxpd)
160 drm_mode_connector_attach_encoder(&imxpd->connector, &imxpd->encoder);
162 imxpd->connector.funcs = &imx_pd_connector_funcs;
163 imxpd->encoder.funcs = &imx_pd_encoder_funcs;
165 imxpd->encoder.encoder_type = DRM_MODE_ENCODER_NONE;
166 imxpd->connector.connector_type = DRM_MODE_CONNECTOR_VGA;
168 drm_encoder_helper_add(&imxpd->encoder, &imx_pd_encoder_helper_funcs);
169 ret = imx_drm_add_encoder(&imxpd->encoder, &imxpd->imx_drm_encoder,
172 dev_err(imxpd->dev, "adding encoder failed with %d\n", ret);
176 drm_connector_helper_add(&imxpd->connector,
177 &imx_pd_connector_helper_funcs);
179 ret = imx_drm_add_connector(&imxpd->connector,
180 &imxpd->imx_drm_connector, THIS_MODULE);
182 imx_drm_remove_encoder(imxpd->imx_drm_encoder);
183 dev_err(imxpd->dev, "adding connector failed with %d\n", ret);
187 imxpd->connector.encoder = &imxpd->encoder;
192 static int imx_pd_probe(struct platform_device *pdev)
194 struct device_node *np = pdev->dev.of_node;
196 struct imx_parallel_display *imxpd;
199 struct pinctrl *pinctrl;
201 imxpd = devm_kzalloc(&pdev->dev, sizeof(*imxpd), GFP_KERNEL);
205 pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
206 if (IS_ERR(pinctrl)) {
207 ret = PTR_ERR(pinctrl);
208 dev_warn(&pdev->dev, "pinctrl_get_select_default failed with %d",
213 edidp = of_get_property(np, "edid", &imxpd->edid_len);
215 imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
217 ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
219 if (!strcmp(fmt, "rgb24"))
220 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB24;
221 else if (!strcmp(fmt, "rgb565"))
222 imxpd->interface_pix_fmt = V4L2_PIX_FMT_RGB565;
225 imxpd->dev = &pdev->dev;
227 ret = imx_pd_register(imxpd);
231 ret = imx_drm_encoder_add_possible_crtcs(imxpd->imx_drm_encoder, np);
233 platform_set_drvdata(pdev, imxpd);
238 static int imx_pd_remove(struct platform_device *pdev)
240 struct imx_parallel_display *imxpd = platform_get_drvdata(pdev);
241 struct drm_connector *connector = &imxpd->connector;
242 struct drm_encoder *encoder = &imxpd->encoder;
244 drm_mode_connector_detach_encoder(connector, encoder);
246 imx_drm_remove_connector(imxpd->imx_drm_connector);
247 imx_drm_remove_encoder(imxpd->imx_drm_encoder);
252 static const struct of_device_id imx_pd_dt_ids[] = {
253 { .compatible = "fsl,imx-parallel-display", },
257 static struct platform_driver imx_pd_driver = {
258 .probe = imx_pd_probe,
259 .remove = imx_pd_remove,
261 .of_match_table = imx_pd_dt_ids,
262 .name = "imx-parallel-display",
263 .owner = THIS_MODULE,
267 module_platform_driver(imx_pd_driver);
269 MODULE_DESCRIPTION("i.MX parallel display driver");
270 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
271 MODULE_LICENSE("GPL");