2 * drivers/gpu/drm/omapdrm/omap_encoder.c
4 * Copyright (C) 2011 Texas Instruments
5 * Author: Rob Clark <rob@ti.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <linux/list.h>
22 #include <drm/drm_crtc.h>
23 #include <drm/drm_crtc_helper.h>
24 #include <drm/drm_edid.h>
32 #define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
34 /* The encoder and connector both map to same dssdev.. the encoder
35 * handles the 'active' parts, ie. anything the modifies the state
36 * of the hw, and the connector handles the 'read-only' parts, like
37 * detecting connection and reading edid.
40 struct drm_encoder base;
41 struct omap_dss_device *dssdev;
44 struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder)
46 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
48 return omap_encoder->dssdev;
51 static void omap_encoder_destroy(struct drm_encoder *encoder)
53 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
55 drm_encoder_cleanup(encoder);
59 static const struct drm_encoder_funcs omap_encoder_funcs = {
60 .destroy = omap_encoder_destroy,
63 static void omap_encoder_mode_set(struct drm_encoder *encoder,
64 struct drm_display_mode *mode,
65 struct drm_display_mode *adjusted_mode)
67 struct drm_device *dev = encoder->dev;
68 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
69 struct omap_dss_device *dssdev = omap_encoder->dssdev;
70 struct drm_connector *connector;
75 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
76 if (connector->encoder == encoder) {
77 hdmi_mode = omap_connector_get_hdmi_mode(connector);
82 if (dssdev->driver->set_hdmi_mode)
83 dssdev->driver->set_hdmi_mode(dssdev, hdmi_mode);
85 if (hdmi_mode && dssdev->driver->set_hdmi_infoframe) {
86 struct hdmi_avi_infoframe avi;
88 r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode,
91 dssdev->driver->set_hdmi_infoframe(dssdev, &avi);
95 static void omap_encoder_disable(struct drm_encoder *encoder)
97 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
98 struct omap_dss_device *dssdev = omap_encoder->dssdev;
99 struct omap_dss_driver *dssdrv = dssdev->driver;
101 dssdrv->disable(dssdev);
104 static int omap_encoder_update(struct drm_encoder *encoder,
105 enum omap_channel channel,
106 struct omap_video_timings *timings)
108 struct drm_device *dev = encoder->dev;
109 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
110 struct omap_dss_device *dssdev = omap_encoder->dssdev;
111 struct omap_dss_driver *dssdrv = dssdev->driver;
114 dssdev->src->manager = omap_dss_get_overlay_manager(channel);
116 if (dssdrv->check_timings) {
117 ret = dssdrv->check_timings(dssdev, timings);
119 struct omap_video_timings t = {0};
121 dssdrv->get_timings(dssdev, &t);
123 if (memcmp(timings, &t, sizeof(struct omap_video_timings)))
130 dev_err(dev->dev, "could not set timings: %d\n", ret);
134 if (dssdrv->set_timings)
135 dssdrv->set_timings(dssdev, timings);
140 static void omap_encoder_enable(struct drm_encoder *encoder)
142 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
143 struct omap_dss_device *dssdev = omap_encoder->dssdev;
144 struct omap_dss_driver *dssdrv = dssdev->driver;
146 omap_encoder_update(encoder, omap_crtc_channel(encoder->crtc),
147 omap_crtc_timings(encoder->crtc));
149 dssdrv->enable(dssdev);
152 static int omap_encoder_atomic_check(struct drm_encoder *encoder,
153 struct drm_crtc_state *crtc_state,
154 struct drm_connector_state *conn_state)
159 static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
160 .mode_set = omap_encoder_mode_set,
161 .disable = omap_encoder_disable,
162 .enable = omap_encoder_enable,
163 .atomic_check = omap_encoder_atomic_check,
166 /* initialize encoder */
167 struct drm_encoder *omap_encoder_init(struct drm_device *dev,
168 struct omap_dss_device *dssdev)
170 struct drm_encoder *encoder = NULL;
171 struct omap_encoder *omap_encoder;
173 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
177 omap_encoder->dssdev = dssdev;
179 encoder = &omap_encoder->base;
181 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
182 DRM_MODE_ENCODER_TMDS, NULL);
183 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
189 omap_encoder_destroy(encoder);