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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2015 Freescale Semiconductor, Inc.
4 *
5 * Freescale DCU drm device driver
6 */
7
8#include <linux/backlight.h>
9#include <linux/of_graph.h>
10
11#include <drm/drm_atomic_helper.h>
12#include <drm/drm_of.h>
13#include <drm/drm_panel.h>
14#include <drm/drm_probe_helper.h>
15
16#include "fsl_dcu_drm_drv.h"
17#include "fsl_tcon.h"
18
19static void fsl_dcu_drm_encoder_destroy(struct drm_encoder *encoder)
20{
21 drm_encoder_cleanup(encoder);
22}
23
24static const struct drm_encoder_funcs encoder_funcs = {
25 .destroy = fsl_dcu_drm_encoder_destroy,
26};
27
28int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
29 struct drm_crtc *crtc)
30{
31 struct drm_encoder *encoder = &fsl_dev->encoder;
32 int ret;
33
34 encoder->possible_crtcs = 1;
35
36 /* Use bypass mode for parallel RGB/LVDS encoder */
37 if (fsl_dev->tcon)
38 fsl_tcon_bypass_enable(fsl_dev->tcon);
39
40 ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
41 DRM_MODE_ENCODER_LVDS, NULL);
42 if (ret < 0)
43 return ret;
44
45 return 0;
46}
47
48static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
49{
50 struct fsl_dcu_drm_connector *fsl_con = to_fsl_dcu_connector(connector);
51
52 drm_connector_unregister(connector);
53 drm_panel_detach(fsl_con->panel);
54 drm_connector_cleanup(connector);
55}
56
57static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
58 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
59 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
60 .destroy = fsl_dcu_drm_connector_destroy,
61 .fill_modes = drm_helper_probe_single_connector_modes,
62 .reset = drm_atomic_helper_connector_reset,
63};
64
65static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
66{
67 struct fsl_dcu_drm_connector *fsl_connector;
68
69 fsl_connector = to_fsl_dcu_connector(connector);
70 return drm_panel_get_modes(fsl_connector->panel);
71}
72
73static int fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
74 struct drm_display_mode *mode)
75{
76 if (mode->hdisplay & 0xf)
77 return MODE_ERROR;
78
79 return MODE_OK;
80}
81
82static const struct drm_connector_helper_funcs connector_helper_funcs = {
83 .get_modes = fsl_dcu_drm_connector_get_modes,
84 .mode_valid = fsl_dcu_drm_connector_mode_valid,
85};
86
87static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
88 struct drm_panel *panel)
89{
90 struct drm_encoder *encoder = &fsl_dev->encoder;
91 struct drm_connector *connector = &fsl_dev->connector.base;
92 int ret;
93
94 fsl_dev->connector.encoder = encoder;
95
96 ret = drm_connector_init(fsl_dev->drm, connector,
97 &fsl_dcu_drm_connector_funcs,
98 DRM_MODE_CONNECTOR_LVDS);
99 if (ret < 0)
100 return ret;
101
102 drm_connector_helper_add(connector, &connector_helper_funcs);
103 ret = drm_connector_register(connector);
104 if (ret < 0)
105 goto err_cleanup;
106
107 ret = drm_connector_attach_encoder(connector, encoder);
108 if (ret < 0)
109 goto err_sysfs;
110
111 ret = drm_panel_attach(panel, connector);
112 if (ret) {
113 dev_err(fsl_dev->dev, "failed to attach panel\n");
114 goto err_sysfs;
115 }
116
117 return 0;
118
119err_sysfs:
120 drm_connector_unregister(connector);
121err_cleanup:
122 drm_connector_cleanup(connector);
123 return ret;
124}
125
126int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
127{
128 struct device_node *panel_node;
129 struct drm_panel *panel;
130 struct drm_bridge *bridge;
131 int ret;
132
133 /* This is for backward compatibility */
134 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
135 if (panel_node) {
136 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
137 of_node_put(panel_node);
138 if (IS_ERR(fsl_dev->connector.panel))
139 return PTR_ERR(fsl_dev->connector.panel);
140
141 return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
142 }
143
144 ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
145 if (ret)
146 return ret;
147
148 if (panel) {
149 fsl_dev->connector.panel = panel;
150 return fsl_dcu_attach_panel(fsl_dev, panel);
151 }
152
153 return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL);
154}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2015 Freescale Semiconductor, Inc.
4 *
5 * Freescale DCU drm device driver
6 */
7
8#include <linux/backlight.h>
9#include <linux/of_graph.h>
10
11#include <drm/drm_atomic_helper.h>
12#include <drm/drm_bridge.h>
13#include <drm/drm_of.h>
14#include <drm/drm_panel.h>
15#include <drm/drm_probe_helper.h>
16#include <drm/drm_simple_kms_helper.h>
17
18#include "fsl_dcu_drm_drv.h"
19#include "fsl_tcon.h"
20
21int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
22 struct drm_crtc *crtc)
23{
24 struct drm_encoder *encoder = &fsl_dev->encoder;
25 int ret;
26
27 encoder->possible_crtcs = 1;
28
29 /* Use bypass mode for parallel RGB/LVDS encoder */
30 if (fsl_dev->tcon)
31 fsl_tcon_bypass_enable(fsl_dev->tcon);
32
33 ret = drm_simple_encoder_init(fsl_dev->drm, encoder,
34 DRM_MODE_ENCODER_LVDS);
35 if (ret < 0)
36 return ret;
37
38 return 0;
39}
40
41static void fsl_dcu_drm_connector_destroy(struct drm_connector *connector)
42{
43 drm_connector_unregister(connector);
44 drm_connector_cleanup(connector);
45}
46
47static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
48 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
49 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
50 .destroy = fsl_dcu_drm_connector_destroy,
51 .fill_modes = drm_helper_probe_single_connector_modes,
52 .reset = drm_atomic_helper_connector_reset,
53};
54
55static int fsl_dcu_drm_connector_get_modes(struct drm_connector *connector)
56{
57 struct fsl_dcu_drm_connector *fsl_connector;
58
59 fsl_connector = to_fsl_dcu_connector(connector);
60 return drm_panel_get_modes(fsl_connector->panel, connector);
61}
62
63static enum drm_mode_status
64fsl_dcu_drm_connector_mode_valid(struct drm_connector *connector,
65 struct drm_display_mode *mode)
66{
67 if (mode->hdisplay & 0xf)
68 return MODE_ERROR;
69
70 return MODE_OK;
71}
72
73static const struct drm_connector_helper_funcs connector_helper_funcs = {
74 .get_modes = fsl_dcu_drm_connector_get_modes,
75 .mode_valid = fsl_dcu_drm_connector_mode_valid,
76};
77
78static int fsl_dcu_attach_panel(struct fsl_dcu_drm_device *fsl_dev,
79 struct drm_panel *panel)
80{
81 struct drm_encoder *encoder = &fsl_dev->encoder;
82 struct drm_connector *connector = &fsl_dev->connector.base;
83 int ret;
84
85 fsl_dev->connector.encoder = encoder;
86
87 ret = drm_connector_init(fsl_dev->drm, connector,
88 &fsl_dcu_drm_connector_funcs,
89 DRM_MODE_CONNECTOR_LVDS);
90 if (ret < 0)
91 return ret;
92
93 drm_connector_helper_add(connector, &connector_helper_funcs);
94 ret = drm_connector_register(connector);
95 if (ret < 0)
96 goto err_cleanup;
97
98 ret = drm_connector_attach_encoder(connector, encoder);
99 if (ret < 0)
100 goto err_sysfs;
101
102 return 0;
103
104err_sysfs:
105 drm_connector_unregister(connector);
106err_cleanup:
107 drm_connector_cleanup(connector);
108 return ret;
109}
110
111int fsl_dcu_create_outputs(struct fsl_dcu_drm_device *fsl_dev)
112{
113 struct device_node *panel_node;
114 struct drm_panel *panel;
115 struct drm_bridge *bridge;
116 int ret;
117
118 /* This is for backward compatibility */
119 panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);
120 if (panel_node) {
121 fsl_dev->connector.panel = of_drm_find_panel(panel_node);
122 of_node_put(panel_node);
123 if (IS_ERR(fsl_dev->connector.panel))
124 return PTR_ERR(fsl_dev->connector.panel);
125
126 return fsl_dcu_attach_panel(fsl_dev, fsl_dev->connector.panel);
127 }
128
129 ret = drm_of_find_panel_or_bridge(fsl_dev->np, 0, 0, &panel, &bridge);
130 if (ret)
131 return ret;
132
133 if (panel) {
134 fsl_dev->connector.panel = panel;
135 return fsl_dcu_attach_panel(fsl_dev, panel);
136 }
137
138 return drm_bridge_attach(&fsl_dev->encoder, bridge, NULL, 0);
139}