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 omap_encoder_set_enabled(encoder, false);
57 drm_encoder_cleanup(encoder);
61 static const struct drm_encoder_funcs omap_encoder_funcs = {
62 .destroy = omap_encoder_destroy,
65 static void omap_encoder_mode_set(struct drm_encoder *encoder,
66 struct drm_display_mode *mode,
67 struct drm_display_mode *adjusted_mode)
69 struct drm_device *dev = encoder->dev;
70 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
71 struct omap_dss_device *dssdev = omap_encoder->dssdev;
72 struct drm_connector *connector;
77 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
78 if (connector->encoder == encoder) {
79 hdmi_mode = omap_connector_get_hdmi_mode(connector);
84 if (dssdev->driver->set_hdmi_mode)
85 dssdev->driver->set_hdmi_mode(dssdev, hdmi_mode);
87 if (hdmi_mode && dssdev->driver->set_hdmi_infoframe) {
88 struct hdmi_avi_infoframe avi;
90 r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode);
92 dssdev->driver->set_hdmi_infoframe(dssdev, &avi);
97 * The CRTC drm_crtc_helper_set_mode() didn't really give us the right order.
98 * The easiest way to work around this was to make all the encoder-helper's
99 * no-op's and have the omap_crtc code take care of the sequencing and call
100 * us in the right points.
102 * FIXME: Revisit this after switching to atomic updates completely.
105 static void omap_encoder_disable(struct drm_encoder *encoder)
109 static void omap_encoder_enable(struct drm_encoder *encoder)
113 static int omap_encoder_atomic_check(struct drm_encoder *encoder,
114 struct drm_crtc_state *crtc_state,
115 struct drm_connector_state *conn_state)
120 static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
121 .mode_set = omap_encoder_mode_set,
122 .disable = omap_encoder_disable,
123 .enable = omap_encoder_enable,
124 .atomic_check = omap_encoder_atomic_check,
128 * Instead of relying on the helpers for modeset, the omap_crtc code
129 * calls these functions in the proper sequence.
132 int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled)
134 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
135 struct omap_dss_device *dssdev = omap_encoder->dssdev;
136 struct omap_dss_driver *dssdrv = dssdev->driver;
139 return dssdrv->enable(dssdev);
141 dssdrv->disable(dssdev);
146 int omap_encoder_update(struct drm_encoder *encoder,
147 struct omap_overlay_manager *mgr,
148 struct omap_video_timings *timings)
150 struct drm_device *dev = encoder->dev;
151 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
152 struct omap_dss_device *dssdev = omap_encoder->dssdev;
153 struct omap_dss_driver *dssdrv = dssdev->driver;
156 dssdev->src->manager = mgr;
158 if (dssdrv->check_timings) {
159 ret = dssdrv->check_timings(dssdev, timings);
161 struct omap_video_timings t = {0};
163 dssdrv->get_timings(dssdev, &t);
165 if (memcmp(timings, &t, sizeof(struct omap_video_timings)))
172 dev_err(dev->dev, "could not set timings: %d\n", ret);
176 if (dssdrv->set_timings)
177 dssdrv->set_timings(dssdev, timings);
182 /* initialize encoder */
183 struct drm_encoder *omap_encoder_init(struct drm_device *dev,
184 struct omap_dss_device *dssdev)
186 struct drm_encoder *encoder = NULL;
187 struct omap_encoder *omap_encoder;
189 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
193 omap_encoder->dssdev = dssdev;
195 encoder = &omap_encoder->base;
197 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
198 DRM_MODE_ENCODER_TMDS);
199 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
205 omap_encoder_destroy(encoder);