1/* 2 * drivers/gpu/drm/omapdrm/omap_encoder.c 3 * 4 * Copyright (C) 2011 Texas Instruments 5 * Author: Rob Clark <rob@ti.com> 6 * 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. 10 * 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 14 * more details. 15 * 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/>. 18 */ 19 20#include <drm/drm_edid.h> 21 22#include "omap_drv.h" 23 24#include "drm_crtc.h" 25#include "drm_crtc_helper.h" 26 27#include <linux/list.h> 28 29 30/* 31 * encoder funcs 32 */ 33 34#define to_omap_encoder(x) container_of(x, struct omap_encoder, base) 35 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. 40 */ 41struct omap_encoder { 42 struct drm_encoder base; 43 struct omap_dss_device *dssdev; 44}; 45 46struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder) 47{ 48 struct omap_encoder *omap_encoder = to_omap_encoder(encoder); 49 50 return omap_encoder->dssdev; 51} 52 53static void omap_encoder_destroy(struct drm_encoder *encoder) 54{ 55 struct omap_encoder *omap_encoder = to_omap_encoder(encoder); 56 57 omap_encoder_set_enabled(encoder, false); 58 59 drm_encoder_cleanup(encoder); 60 kfree(omap_encoder); 61} 62 63static const struct drm_encoder_funcs omap_encoder_funcs = { 64 .destroy = omap_encoder_destroy, 65}; 66 67/* 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. 72 * 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 76 * that. 77 */ 78 79static void omap_encoder_dpms(struct drm_encoder *encoder, int mode) 80{ 81} 82 83static bool omap_encoder_mode_fixup(struct drm_encoder *encoder, 84 const struct drm_display_mode *mode, 85 struct drm_display_mode *adjusted_mode) 86{ 87 return true; 88} 89 90static void omap_encoder_mode_set(struct drm_encoder *encoder, 91 struct drm_display_mode *mode, 92 struct drm_display_mode *adjusted_mode) 93{ 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; 98 bool hdmi_mode; 99 int r; 100 101 hdmi_mode = false; 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); 105 break; 106 } 107 } 108 109 if (dssdev->driver->set_hdmi_mode) 110 dssdev->driver->set_hdmi_mode(dssdev, hdmi_mode); 111 112 if (hdmi_mode && dssdev->driver->set_hdmi_infoframe) { 113 struct hdmi_avi_infoframe avi; 114 115 r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode); 116 if (r == 0) 117 dssdev->driver->set_hdmi_infoframe(dssdev, &avi); 118 } 119} 120 121static void omap_encoder_prepare(struct drm_encoder *encoder) 122{ 123} 124 125static void omap_encoder_commit(struct drm_encoder *encoder) 126{ 127} 128 129static 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, 135}; 136 137/* 138 * Instead of relying on the helpers for modeset, the omap_crtc code 139 * calls these functions in the proper sequence. 140 */ 141 142int omap_encoder_set_enabled(struct drm_encoder *encoder, bool enabled) 143{ 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; 147 148 if (enabled) { 149 return dssdrv->enable(dssdev); 150 } else { 151 dssdrv->disable(dssdev); 152 return 0; 153 } 154} 155 156int omap_encoder_update(struct drm_encoder *encoder, 157 struct omap_overlay_manager *mgr, 158 struct omap_video_timings *timings) 159{ 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; 164 int ret; 165 166 dssdev->src->manager = mgr; 167 168 if (dssdrv->check_timings) { 169 ret = dssdrv->check_timings(dssdev, timings); 170 } else { 171 struct omap_video_timings t = {0}; 172 173 dssdrv->get_timings(dssdev, &t); 174 175 if (memcmp(timings, &t, sizeof(struct omap_video_timings))) 176 ret = -EINVAL; 177 else 178 ret = 0; 179 } 180 181 if (ret) { 182 dev_err(dev->dev, "could not set timings: %d\n", ret); 183 return ret; 184 } 185 186 if (dssdrv->set_timings) 187 dssdrv->set_timings(dssdev, timings); 188 189 return 0; 190} 191 192/* initialize encoder */ 193struct drm_encoder *omap_encoder_init(struct drm_device *dev, 194 struct omap_dss_device *dssdev) 195{ 196 struct drm_encoder *encoder = NULL; 197 struct omap_encoder *omap_encoder; 198 199 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL); 200 if (!omap_encoder) 201 goto fail; 202 203 omap_encoder->dssdev = dssdev; 204 205 encoder = &omap_encoder->base; 206 207 drm_encoder_init(dev, encoder, &omap_encoder_funcs, 208 DRM_MODE_ENCODER_TMDS); 209 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs); 210 211 return encoder; 212 213fail: 214 if (encoder) 215 omap_encoder_destroy(encoder); 216 217 return NULL; 218} 219