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 <drm/drm_edid.h>
25 #include "drm_crtc_helper.h"
27 #include <linux/list.h>
34 #define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
36 /* The encoder and connector both map to same dssdev.. the encoder
37 * handles the 'active' parts, ie. anything the modifies the state
38 * of the hw, and the connector handles the 'read-only' parts, like
39 * detecting connection and reading edid.
42 struct drm_encoder base;
43 struct omap_dss_device *dssdev;
46 struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder)
48 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
50 return omap_encoder->dssdev;
53 static void omap_encoder_destroy(struct drm_encoder *encoder)
55 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
57 omap_encoder_set_enabled(encoder, false);
59 drm_encoder_cleanup(encoder);
63 static const struct drm_encoder_funcs omap_encoder_funcs = {
64 .destroy = omap_encoder_destroy,
68 * The CRTC drm_crtc_helper_set_mode() doesn't really give us the right
69 * order.. the easiest way to work around this for now is to make all
70 * the encoder-helper's no-op's and have the omap_crtc code take care
71 * of the sequencing and call us in the right points.
73 * Eventually to handle connecting CRTCs to different encoders properly,
74 * either the CRTC helpers need to change or we need to replace
75 * drm_crtc_helper_set_mode(), but lets wait until atomic-modeset for
79 static void omap_encoder_dpms(struct drm_encoder *encoder, int mode)
83 static bool omap_encoder_mode_fixup(struct drm_encoder *encoder,
84 const struct drm_display_mode *mode,
85 struct drm_display_mode *adjusted_mode)
90 static void omap_encoder_mode_set(struct drm_encoder *encoder,
91 struct drm_display_mode *mode,
92 struct drm_display_mode *adjusted_mode)
94 struct drm_device *dev = encoder->dev;
95 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
96 struct omap_dss_device *dssdev = omap_encoder->dssdev;
97 struct drm_connector *connector;
102 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
103 if (connector->encoder == encoder) {
104 hdmi_mode = omap_connector_get_hdmi_mode(connector);
109 if (dssdev->driver->set_hdmi_mode)
110 dssdev->driver->set_hdmi_mode(dssdev, hdmi_mode);
112 if (hdmi_mode && dssdev->driver->set_hdmi_infoframe) {
113 struct hdmi_avi_infoframe avi;
115 r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode);
117 dssdev->driver->set_hdmi_infoframe(dssdev, &avi);
121 static void omap_encoder_prepare(struct drm_encoder *encoder)
125 static void omap_encoder_commit(struct drm_encoder *encoder)
129 static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
130 .dpms = omap_encoder_dpms,
131 .mode_fixup = omap_encoder_mode_fixup,
132 .mode_set = omap_encoder_mode_set,
133 .prepare = omap_encoder_prepare,
134 .commit = omap_encoder_commit,
138 * Instead of relying on the helpers for modeset, the omap_crtc code
139 * calls these functions in the proper sequence.
142 int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled)
144 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
145 struct omap_dss_device *dssdev = omap_encoder->dssdev;
146 struct omap_dss_driver *dssdrv = dssdev->driver;
149 return dssdrv->enable(dssdev);
151 dssdrv->disable(dssdev);
156 int omap_encoder_update(struct drm_encoder *encoder,
157 struct omap_overlay_manager *mgr,
158 struct omap_video_timings *timings)
160 struct drm_device *dev = encoder->dev;
161 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
162 struct omap_dss_device *dssdev = omap_encoder->dssdev;
163 struct omap_dss_driver *dssdrv = dssdev->driver;
166 dssdev->src->manager = mgr;
168 if (dssdrv->check_timings) {
169 ret = dssdrv->check_timings(dssdev, timings);
171 struct omap_video_timings t = {0};
173 dssdrv->get_timings(dssdev, &t);
175 if (memcmp(timings, &t, sizeof(struct omap_video_timings)))
182 dev_err(dev->dev, "could not set timings: %d\n", ret);
186 if (dssdrv->set_timings)
187 dssdrv->set_timings(dssdev, timings);
192 /* initialize encoder */
193 struct drm_encoder *omap_encoder_init(struct drm_device *dev,
194 struct omap_dss_device *dssdev)
196 struct drm_encoder *encoder = NULL;
197 struct omap_encoder *omap_encoder;
199 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
203 omap_encoder->dssdev = dssdev;
205 encoder = &omap_encoder->base;
207 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
208 DRM_MODE_ENCODER_TMDS);
209 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
215 omap_encoder_destroy(encoder);