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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
4 * Author: Rob Clark <rob@ti.com>
5 */
6
7#include <linux/list.h>
8
9#include <drm/drm_crtc.h>
10#include <drm/drm_modeset_helper_vtables.h>
11#include <drm/drm_edid.h>
12#include <drm/drm_panel.h>
13
14#include "omap_drv.h"
15
16/*
17 * encoder funcs
18 */
19
20#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
21
22/* The encoder and connector both map to same dssdev.. the encoder
23 * handles the 'active' parts, ie. anything the modifies the state
24 * of the hw, and the connector handles the 'read-only' parts, like
25 * detecting connection and reading edid.
26 */
27struct omap_encoder {
28 struct drm_encoder base;
29 struct omap_dss_device *output;
30};
31
32static void omap_encoder_destroy(struct drm_encoder *encoder)
33{
34 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
35
36 drm_encoder_cleanup(encoder);
37 kfree(omap_encoder);
38}
39
40static const struct drm_encoder_funcs omap_encoder_funcs = {
41 .destroy = omap_encoder_destroy,
42};
43
44static void omap_encoder_update_videomode_flags(struct videomode *vm,
45 u32 bus_flags)
46{
47 if (!(vm->flags & (DISPLAY_FLAGS_DE_LOW |
48 DISPLAY_FLAGS_DE_HIGH))) {
49 if (bus_flags & DRM_BUS_FLAG_DE_LOW)
50 vm->flags |= DISPLAY_FLAGS_DE_LOW;
51 else if (bus_flags & DRM_BUS_FLAG_DE_HIGH)
52 vm->flags |= DISPLAY_FLAGS_DE_HIGH;
53 }
54
55 if (!(vm->flags & (DISPLAY_FLAGS_PIXDATA_POSEDGE |
56 DISPLAY_FLAGS_PIXDATA_NEGEDGE))) {
57 if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
58 vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
59 else if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
60 vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
61 }
62
63 if (!(vm->flags & (DISPLAY_FLAGS_SYNC_POSEDGE |
64 DISPLAY_FLAGS_SYNC_NEGEDGE))) {
65 if (bus_flags & DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE)
66 vm->flags |= DISPLAY_FLAGS_SYNC_POSEDGE;
67 else if (bus_flags & DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE)
68 vm->flags |= DISPLAY_FLAGS_SYNC_NEGEDGE;
69 }
70}
71
72static void omap_encoder_hdmi_mode_set(struct drm_connector *connector,
73 struct drm_encoder *encoder,
74 struct drm_display_mode *adjusted_mode)
75{
76 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
77 struct omap_dss_device *dssdev = omap_encoder->output;
78 bool hdmi_mode;
79
80 hdmi_mode = omap_connector_get_hdmi_mode(connector);
81
82 if (dssdev->ops->hdmi.set_hdmi_mode)
83 dssdev->ops->hdmi.set_hdmi_mode(dssdev, hdmi_mode);
84
85 if (hdmi_mode && dssdev->ops->hdmi.set_infoframe) {
86 struct hdmi_avi_infoframe avi;
87 int r;
88
89 r = drm_hdmi_avi_infoframe_from_display_mode(&avi, connector,
90 adjusted_mode);
91 if (r == 0)
92 dssdev->ops->hdmi.set_infoframe(dssdev, &avi);
93 }
94}
95
96static void omap_encoder_mode_set(struct drm_encoder *encoder,
97 struct drm_display_mode *mode,
98 struct drm_display_mode *adjusted_mode)
99{
100 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
101 struct omap_dss_device *output = omap_encoder->output;
102 struct omap_dss_device *dssdev;
103 struct drm_device *dev = encoder->dev;
104 struct drm_connector *connector;
105 struct drm_bridge *bridge;
106 struct videomode vm = { 0 };
107 u32 bus_flags;
108
109 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
110 if (connector->encoder == encoder)
111 break;
112 }
113
114 drm_display_mode_to_videomode(adjusted_mode, &vm);
115
116 /*
117 * HACK: This fixes the vm flags.
118 * struct drm_display_mode does not contain the VSYNC/HSYNC/DE flags and
119 * they get lost when converting back and forth between struct
120 * drm_display_mode and struct videomode. The hack below goes and
121 * fetches the missing flags.
122 *
123 * A better solution is to use DRM's bus-flags through the whole driver.
124 */
125 for (dssdev = output; dssdev; dssdev = dssdev->next)
126 omap_encoder_update_videomode_flags(&vm, dssdev->bus_flags);
127
128 for (bridge = output->bridge; bridge; bridge = bridge->next) {
129 if (!bridge->timings)
130 continue;
131
132 bus_flags = bridge->timings->input_bus_flags;
133 omap_encoder_update_videomode_flags(&vm, bus_flags);
134 }
135
136 bus_flags = connector->display_info.bus_flags;
137 omap_encoder_update_videomode_flags(&vm, bus_flags);
138
139 /* Set timings for all devices in the display pipeline. */
140 dss_mgr_set_timings(output, &vm);
141
142 for (dssdev = output; dssdev; dssdev = dssdev->next) {
143 if (dssdev->ops->set_timings)
144 dssdev->ops->set_timings(dssdev, adjusted_mode);
145 }
146
147 /* Set the HDMI mode and HDMI infoframe if applicable. */
148 if (output->type == OMAP_DISPLAY_TYPE_HDMI)
149 omap_encoder_hdmi_mode_set(connector, encoder, adjusted_mode);
150}
151
152static void omap_encoder_disable(struct drm_encoder *encoder)
153{
154 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
155 struct omap_dss_device *dssdev = omap_encoder->output;
156 struct drm_device *dev = encoder->dev;
157
158 dev_dbg(dev->dev, "disable(%s)\n", dssdev->name);
159
160 /* Disable the panel if present. */
161 if (dssdev->panel) {
162 drm_panel_disable(dssdev->panel);
163 drm_panel_unprepare(dssdev->panel);
164 }
165
166 /*
167 * Disable the chain of external devices, starting at the one at the
168 * internal encoder's output.
169 */
170 omapdss_device_disable(dssdev->next);
171
172 /*
173 * Disable the internal encoder. This will disable the DSS output. The
174 * DSI is treated as an exception as DSI pipelines still use the legacy
175 * flow where the pipeline output controls the encoder.
176 */
177 if (dssdev->type != OMAP_DISPLAY_TYPE_DSI) {
178 dssdev->ops->disable(dssdev);
179 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
180 }
181
182 /*
183 * Perform the post-disable operations on the chain of external devices
184 * to complete the display pipeline disable.
185 */
186 omapdss_device_post_disable(dssdev->next);
187}
188
189static void omap_encoder_enable(struct drm_encoder *encoder)
190{
191 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
192 struct omap_dss_device *dssdev = omap_encoder->output;
193 struct drm_device *dev = encoder->dev;
194
195 dev_dbg(dev->dev, "enable(%s)\n", dssdev->name);
196
197 /* Prepare the chain of external devices for pipeline enable. */
198 omapdss_device_pre_enable(dssdev->next);
199
200 /*
201 * Enable the internal encoder. This will enable the DSS output. The
202 * DSI is treated as an exception as DSI pipelines still use the legacy
203 * flow where the pipeline output controls the encoder.
204 */
205 if (dssdev->type != OMAP_DISPLAY_TYPE_DSI) {
206 dssdev->ops->enable(dssdev);
207 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
208 }
209
210 /*
211 * Enable the chain of external devices, starting at the one at the
212 * internal encoder's output.
213 */
214 omapdss_device_enable(dssdev->next);
215
216 /* Enable the panel if present. */
217 if (dssdev->panel) {
218 drm_panel_prepare(dssdev->panel);
219 drm_panel_enable(dssdev->panel);
220 }
221}
222
223static int omap_encoder_atomic_check(struct drm_encoder *encoder,
224 struct drm_crtc_state *crtc_state,
225 struct drm_connector_state *conn_state)
226{
227 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
228 enum drm_mode_status status;
229
230 status = omap_connector_mode_fixup(omap_encoder->output,
231 &crtc_state->mode,
232 &crtc_state->adjusted_mode);
233 if (status != MODE_OK) {
234 dev_err(encoder->dev->dev, "invalid timings: %d\n", status);
235 return -EINVAL;
236 }
237
238 return 0;
239}
240
241static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
242 .mode_set = omap_encoder_mode_set,
243 .disable = omap_encoder_disable,
244 .enable = omap_encoder_enable,
245 .atomic_check = omap_encoder_atomic_check,
246};
247
248/* initialize encoder */
249struct drm_encoder *omap_encoder_init(struct drm_device *dev,
250 struct omap_dss_device *output)
251{
252 struct drm_encoder *encoder = NULL;
253 struct omap_encoder *omap_encoder;
254
255 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
256 if (!omap_encoder)
257 goto fail;
258
259 omap_encoder->output = output;
260
261 encoder = &omap_encoder->base;
262
263 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
264 DRM_MODE_ENCODER_TMDS, NULL);
265 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
266
267 return encoder;
268
269fail:
270 if (encoder)
271 omap_encoder_destroy(encoder);
272
273 return NULL;
274}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
4 * Author: Rob Clark <rob@ti.com>
5 */
6
7#include <linux/list.h>
8
9#include <drm/drm_bridge.h>
10#include <drm/drm_crtc.h>
11#include <drm/drm_modeset_helper_vtables.h>
12#include <drm/drm_edid.h>
13
14#include "omap_drv.h"
15
16/*
17 * encoder funcs
18 */
19
20#define to_omap_encoder(x) container_of(x, struct omap_encoder, base)
21
22/* The encoder and connector both map to same dssdev.. the encoder
23 * handles the 'active' parts, ie. anything the modifies the state
24 * of the hw, and the connector handles the 'read-only' parts, like
25 * detecting connection and reading edid.
26 */
27struct omap_encoder {
28 struct drm_encoder base;
29 struct omap_dss_device *output;
30};
31
32static void omap_encoder_destroy(struct drm_encoder *encoder)
33{
34 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
35
36 drm_encoder_cleanup(encoder);
37 kfree(omap_encoder);
38}
39
40static const struct drm_encoder_funcs omap_encoder_funcs = {
41 .destroy = omap_encoder_destroy,
42};
43
44static void omap_encoder_update_videomode_flags(struct videomode *vm,
45 u32 bus_flags)
46{
47 if (!(vm->flags & (DISPLAY_FLAGS_DE_LOW |
48 DISPLAY_FLAGS_DE_HIGH))) {
49 if (bus_flags & DRM_BUS_FLAG_DE_LOW)
50 vm->flags |= DISPLAY_FLAGS_DE_LOW;
51 else if (bus_flags & DRM_BUS_FLAG_DE_HIGH)
52 vm->flags |= DISPLAY_FLAGS_DE_HIGH;
53 }
54
55 if (!(vm->flags & (DISPLAY_FLAGS_PIXDATA_POSEDGE |
56 DISPLAY_FLAGS_PIXDATA_NEGEDGE))) {
57 if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
58 vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
59 else if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
60 vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
61 }
62
63 if (!(vm->flags & (DISPLAY_FLAGS_SYNC_POSEDGE |
64 DISPLAY_FLAGS_SYNC_NEGEDGE))) {
65 if (bus_flags & DRM_BUS_FLAG_SYNC_DRIVE_POSEDGE)
66 vm->flags |= DISPLAY_FLAGS_SYNC_POSEDGE;
67 else if (bus_flags & DRM_BUS_FLAG_SYNC_DRIVE_NEGEDGE)
68 vm->flags |= DISPLAY_FLAGS_SYNC_NEGEDGE;
69 }
70}
71
72static void omap_encoder_mode_set(struct drm_encoder *encoder,
73 struct drm_display_mode *mode,
74 struct drm_display_mode *adjusted_mode)
75{
76 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
77 struct omap_dss_device *output = omap_encoder->output;
78 struct omap_dss_device *dssdev;
79 struct drm_device *dev = encoder->dev;
80 struct drm_connector *connector;
81 struct drm_bridge *bridge;
82 struct videomode vm = { 0 };
83 u32 bus_flags;
84
85 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
86 if (connector->encoder == encoder)
87 break;
88 }
89
90 drm_display_mode_to_videomode(adjusted_mode, &vm);
91
92 /*
93 * HACK: This fixes the vm flags.
94 * struct drm_display_mode does not contain the VSYNC/HSYNC/DE flags and
95 * they get lost when converting back and forth between struct
96 * drm_display_mode and struct videomode. The hack below goes and
97 * fetches the missing flags.
98 *
99 * A better solution is to use DRM's bus-flags through the whole driver.
100 */
101 for (dssdev = output; dssdev; dssdev = dssdev->next)
102 omap_encoder_update_videomode_flags(&vm, dssdev->bus_flags);
103
104 for (bridge = output->bridge; bridge;
105 bridge = drm_bridge_get_next_bridge(bridge)) {
106 if (!bridge->timings)
107 continue;
108
109 bus_flags = bridge->timings->input_bus_flags;
110 omap_encoder_update_videomode_flags(&vm, bus_flags);
111 }
112
113 bus_flags = connector->display_info.bus_flags;
114 omap_encoder_update_videomode_flags(&vm, bus_flags);
115
116 /* Set timings for the dss manager. */
117 dss_mgr_set_timings(output, &vm);
118}
119
120static void omap_encoder_disable(struct drm_encoder *encoder)
121{
122 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
123 struct omap_dss_device *dssdev = omap_encoder->output;
124 struct drm_device *dev = encoder->dev;
125
126 dev_dbg(dev->dev, "disable(%s)\n", dssdev->name);
127
128 /*
129 * Disable the chain of external devices, starting at the one at the
130 * internal encoder's output. This is used for DSI outputs only, as
131 * dssdev->next is NULL for all other outputs.
132 */
133 omapdss_device_disable(dssdev->next);
134}
135
136static void omap_encoder_enable(struct drm_encoder *encoder)
137{
138 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
139 struct omap_dss_device *dssdev = omap_encoder->output;
140 struct drm_device *dev = encoder->dev;
141
142 dev_dbg(dev->dev, "enable(%s)\n", dssdev->name);
143
144 /*
145 * Enable the chain of external devices, starting at the one at the
146 * internal encoder's output. This is used for DSI outputs only, as
147 * dssdev->next is NULL for all other outputs.
148 */
149 omapdss_device_enable(dssdev->next);
150}
151
152static int omap_encoder_atomic_check(struct drm_encoder *encoder,
153 struct drm_crtc_state *crtc_state,
154 struct drm_connector_state *conn_state)
155{
156 struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
157 enum drm_mode_status status;
158
159 status = omap_connector_mode_fixup(omap_encoder->output,
160 &crtc_state->mode,
161 &crtc_state->adjusted_mode);
162 if (status != MODE_OK) {
163 dev_err(encoder->dev->dev, "invalid timings: %d\n", status);
164 return -EINVAL;
165 }
166
167 return 0;
168}
169
170static const struct drm_encoder_helper_funcs omap_encoder_helper_funcs = {
171 .mode_set = omap_encoder_mode_set,
172 .disable = omap_encoder_disable,
173 .enable = omap_encoder_enable,
174 .atomic_check = omap_encoder_atomic_check,
175};
176
177/* initialize encoder */
178struct drm_encoder *omap_encoder_init(struct drm_device *dev,
179 struct omap_dss_device *output)
180{
181 struct drm_encoder *encoder = NULL;
182 struct omap_encoder *omap_encoder;
183
184 omap_encoder = kzalloc(sizeof(*omap_encoder), GFP_KERNEL);
185 if (!omap_encoder)
186 goto fail;
187
188 omap_encoder->output = output;
189
190 encoder = &omap_encoder->base;
191
192 drm_encoder_init(dev, encoder, &omap_encoder_funcs,
193 DRM_MODE_ENCODER_TMDS, NULL);
194 drm_encoder_helper_add(encoder, &omap_encoder_helper_funcs);
195
196 return encoder;
197
198fail:
199 if (encoder)
200 omap_encoder_destroy(encoder);
201
202 return NULL;
203}