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2024-05-10 cde9070d9970eef1f7ec2360586c802a16230ad8 
 kernel/drivers/gpu/drm/omapdrm/omap_encoder.c
....@@ -1,24 +1,14 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
34  * Author: Rob Clark <rob@ti.com>
4
- *
5
- * This program is free software; you can redistribute it and/or modify it
6
- * under the terms of the GNU General Public License version 2 as published by
7
- * the Free Software Foundation.
8
- *
9
- * This program is distributed in the hope that it will be useful, but WITHOUT
10
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12
- * more details.
13
- *
14
- * You should have received a copy of the GNU General Public License along with
15
- * this program.  If not, see <http://www.gnu.org/licenses/>.
165  */
176 
187 #include <linux/list.h>
198 
9
+#include <drm/drm_bridge.h>
2010 #include <drm/drm_crtc.h>
21
-#include <drm/drm_crtc_helper.h>
11
+#include <drm/drm_modeset_helper_vtables.h>
2212 #include <drm/drm_edid.h>
2313 
2414 #include "omap_drv.h"
....@@ -36,15 +26,8 @@
3626  */
3727 struct omap_encoder {
3828 	struct drm_encoder base;
39
-	struct omap_dss_device *dssdev;
29
+	struct omap_dss_device *output;
4030 };
41
-
42
-struct omap_dss_device *omap_encoder_get_dssdev(struct drm_encoder *encoder)
43
-{
44
-	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
45
-
46
-	return omap_encoder->dssdev;
47
-}
4831 
4932 static void omap_encoder_destroy(struct drm_encoder *encoder)
5033 {
....@@ -58,102 +41,129 @@
5841 	.destroy = omap_encoder_destroy,
5942 };
6043 
61
-static void omap_encoder_mode_set(struct drm_encoder *encoder,
62
-				struct drm_display_mode *mode,
63
-				struct drm_display_mode *adjusted_mode)
44
+static void omap_encoder_update_videomode_flags(struct videomode *vm,
45
+						u32 bus_flags)
6446 {
65
-	struct drm_device *dev = encoder->dev;
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
+
72
+static void omap_encoder_mode_set(struct drm_encoder *encoder,
73
+				  struct drm_display_mode *mode,
74
+				  struct drm_display_mode *adjusted_mode)
75
+{
6676 	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
67
-	struct omap_dss_device *dssdev = omap_encoder->dssdev;
77
+	struct omap_dss_device *output = omap_encoder->output;
78
+	struct omap_dss_device *dssdev;
79
+	struct drm_device *dev = encoder->dev;
6880 	struct drm_connector *connector;
69
-	bool hdmi_mode;
70
-	int r;
81
+	struct drm_bridge *bridge;
82
+	struct videomode vm = { 0 };
83
+	u32 bus_flags;
7184 
72
-	hdmi_mode = false;
7385 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
74
-		if (connector->encoder == encoder) {
75
-			hdmi_mode = omap_connector_get_hdmi_mode(connector);
86
+		if (connector->encoder == encoder)
7687 			break;
77
-		}
7888 	}
7989 
80
-	if (dssdev->driver->set_hdmi_mode)
81
-		dssdev->driver->set_hdmi_mode(dssdev, hdmi_mode);
90
+	drm_display_mode_to_videomode(adjusted_mode, &vm);
8291 
83
-	if (hdmi_mode && dssdev->driver->set_hdmi_infoframe) {
84
-		struct hdmi_avi_infoframe avi;
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);
85103 
86
-		r = drm_hdmi_avi_infoframe_from_display_mode(&avi, adjusted_mode,
87
-							     false);
88
-		if (r == 0)
89
-			dssdev->driver->set_hdmi_infoframe(dssdev, &avi);
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);
90111 	}
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);
91118 }
92119 
93120 static void omap_encoder_disable(struct drm_encoder *encoder)
94121 {
95122 	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
96
-	struct omap_dss_device *dssdev = omap_encoder->dssdev;
97
-	struct omap_dss_driver *dssdrv = dssdev->driver;
98
-
99
-	dssdrv->disable(dssdev);
100
-}
101
-
102
-static int omap_encoder_update(struct drm_encoder *encoder,
103
-			       enum omap_channel channel,
104
-			       struct videomode *vm)
105
-{
123
+	struct omap_dss_device *dssdev = omap_encoder->output;
106124 	struct drm_device *dev = encoder->dev;
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;
110
-	int ret;
111125 
112
-	if (dssdrv->check_timings) {
113
-		ret = dssdrv->check_timings(dssdev, vm);
114
-	} else {
115
-		struct videomode t = {0};
126
+	dev_dbg(dev->dev, "disable(%s)\n", dssdev->name);
116127 
117
-		dssdrv->get_timings(dssdev, &t);
118
-
119
-		if (memcmp(vm, &t, sizeof(*vm)))
120
-			ret = -EINVAL;
121
-		else
122
-			ret = 0;
123
-	}
124
-
125
-	if (ret) {
126
-		dev_err(dev->dev, "could not set timings: %d\n", ret);
127
-		return ret;
128
-	}
129
-
130
-	if (dssdrv->set_timings)
131
-		dssdrv->set_timings(dssdev, vm);
132
-
133
-	return 0;
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);
134134 }
135135 
136136 static void omap_encoder_enable(struct drm_encoder *encoder)
137137 {
138138 	struct omap_encoder *omap_encoder = to_omap_encoder(encoder);
139
-	struct omap_dss_device *dssdev = omap_encoder->dssdev;
140
-	struct omap_dss_driver *dssdrv = dssdev->driver;
141
-	int r;
139
+	struct omap_dss_device *dssdev = omap_encoder->output;
140
+	struct drm_device *dev = encoder->dev;
142141 
143
-	omap_encoder_update(encoder, omap_crtc_channel(encoder->crtc),
144
-			    omap_crtc_timings(encoder->crtc));
142
+	dev_dbg(dev->dev, "enable(%s)\n", dssdev->name);
145143 
146
-	r = dssdrv->enable(dssdev);
147
-	if (r)
148
-		dev_err(encoder->dev->dev,
149
-			"Failed to enable display '%s': %d\n",
150
-			dssdev->name, r);
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);
151150 }
152151 
153152 static int omap_encoder_atomic_check(struct drm_encoder *encoder,
154153 				     struct drm_crtc_state *crtc_state,
155154 				     struct drm_connector_state *conn_state)
156155 {
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
+
157167 	return 0;
158168 }
159169 
....@@ -166,7 +176,7 @@
166176 
167177 /* initialize encoder */
168178 struct drm_encoder *omap_encoder_init(struct drm_device *dev,
169
-		struct omap_dss_device *dssdev)
179
+				      struct omap_dss_device *output)
170180 {
171181 	struct drm_encoder *encoder = NULL;
172182 	struct omap_encoder *omap_encoder;
....@@ -175,7 +185,7 @@
175185 	if (!omap_encoder)
176186 		goto fail;
177187 
178
-	omap_encoder->dssdev = dssdev;
188
+	omap_encoder->output = output;
179189 
180190 	encoder = &omap_encoder->base;
181191