2 * drivers/staging/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/>.
23 #include "drm_crtc_helper.h"
25 #include <linux/list.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 static void omap_encoder_destroy(struct drm_encoder *encoder)
46 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
47 drm_encoder_cleanup(encoder);
51 static const struct drm_encoder_funcs omap_encoder_funcs = {
52 .destroy = omap_encoder_destroy,
56 * The CRTC drm_crtc_helper_set_mode() doesn't really give us the right
57 * order.. the easiest way to work around this for now is to make all
58 * the encoder-helper's no-op's and have the omap_crtc code take care
59 * of the sequencing and call us in the right points.
61 * Eventually to handle connecting CRTCs to different encoders properly,
62 * either the CRTC helpers need to change or we need to replace
63 * drm_crtc_helper_set_mode(), but lets wait until atomic-modeset for
67 static void omap_encoder_dpms(struct drm_encoder *encoder, int mode)
71 static bool omap_encoder_mode_fixup(struct drm_encoder *encoder,
72 const struct drm_display_mode *mode,
73 struct drm_display_mode *adjusted_mode)
78 static void omap_encoder_mode_set(struct drm_encoder *encoder,
79 struct drm_display_mode *mode,
80 struct drm_display_mode *adjusted_mode)
84 static void omap_encoder_prepare(struct drm_encoder *encoder)
88 static void omap_encoder_commit(struct drm_encoder *encoder)
92 static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
93 .dpms = omap_encoder_dpms,
94 .mode_fixup = omap_encoder_mode_fixup,
95 .mode_set = omap_encoder_mode_set,
96 .prepare = omap_encoder_prepare,
97 .commit = omap_encoder_commit,
101 * Instead of relying on the helpers for modeset, the omap_crtc code
102 * calls these functions in the proper sequence.
105 int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled)
107 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
108 struct omap_dss_device *dssdev = omap_encoder->dssdev;
109 struct omap_dss_driver *dssdrv = dssdev->driver;
112 return dssdrv->enable(dssdev);
114 dssdrv->disable(dssdev);
119 int omap_encoder_update(struct drm_encoder *encoder,
120 struct omap_overlay_manager *mgr,
121 struct omap_video_timings *timings)
123 struct drm_device *dev = encoder->dev;
124 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
125 struct omap_dss_device *dssdev = omap_encoder->dssdev;
126 struct omap_dss_driver *dssdrv = dssdev->driver;
129 dssdev->output->manager = mgr;
131 ret = dssdrv->check_timings(dssdev, timings);
133 dev_err(dev->dev, "could not set timings: %d\n", ret);
137 dssdrv->set_timings(dssdev, timings);
142 /* initialize encoder */
143 struct drm_encoder *omap_encoder_init(struct drm_device *dev,
144 struct omap_dss_device *dssdev)
146 struct drm_encoder *encoder = NULL;
147 struct omap_encoder *omap_encoder;
149 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
151 dev_err(dev->dev, "could not allocate encoder\n");
155 omap_encoder->dssdev = dssdev;
157 encoder = &omap_encoder->base;
159 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
160 DRM_MODE_ENCODER_TMDS);
161 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
167 omap_encoder_destroy(encoder);