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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
103cd8bc JS |
2 | /* |
3 | * Copyright (C) 2015 Texas Instruments | |
4 | * Author: Jyri Sarha <jsarha@ti.com> | |
103cd8bc JS |
5 | */ |
6 | ||
7 | #include <linux/component.h> | |
8 | #include <linux/of_graph.h> | |
fcb57664 | 9 | |
fcd70cd3 | 10 | #include <drm/drm_atomic_helper.h> |
ee68c743 | 11 | #include <drm/drm_bridge.h> |
97ac0e47 | 12 | #include <drm/drm_of.h> |
d877d6ea | 13 | #include <drm/drm_simple_kms_helper.h> |
103cd8bc JS |
14 | |
15 | #include "tilcdc_drv.h" | |
16 | #include "tilcdc_external.h" | |
17 | ||
18 | static const struct tilcdc_panel_info panel_info_tda998x = { | |
19 | .ac_bias = 255, | |
20 | .ac_bias_intrpt = 0, | |
21 | .dma_burst_sz = 16, | |
22 | .bpp = 16, | |
23 | .fdd = 0x80, | |
24 | .tft_alt_mode = 0, | |
25 | .invert_pxl_clk = 1, | |
26 | .sync_edge = 1, | |
27 | .sync_ctrl = 1, | |
28 | .raster_order = 0, | |
29 | }; | |
30 | ||
ec9eab09 JS |
31 | static const struct tilcdc_panel_info panel_info_default = { |
32 | .ac_bias = 255, | |
33 | .ac_bias_intrpt = 0, | |
34 | .dma_burst_sz = 16, | |
35 | .bpp = 16, | |
36 | .fdd = 0x80, | |
37 | .tft_alt_mode = 0, | |
38 | .sync_edge = 0, | |
39 | .sync_ctrl = 1, | |
40 | .raster_order = 0, | |
41 | }; | |
42 | ||
ec9eab09 JS |
43 | static |
44 | struct drm_connector *tilcdc_encoder_find_connector(struct drm_device *ddev, | |
45 | struct drm_encoder *encoder) | |
103cd8bc | 46 | { |
103cd8bc | 47 | struct drm_connector *connector; |
ec9eab09 | 48 | |
0b7510d1 VS |
49 | list_for_each_entry(connector, &ddev->mode_config.connector_list, head) { |
50 | if (drm_connector_has_possible_encoder(connector, encoder)) | |
51 | return connector; | |
52 | } | |
ec9eab09 JS |
53 | |
54 | dev_err(ddev->dev, "No connector found for %s encoder (id %d)\n", | |
55 | encoder->name, encoder->base.id); | |
56 | ||
57 | return NULL; | |
58 | } | |
59 | ||
60 | int tilcdc_add_component_encoder(struct drm_device *ddev) | |
61 | { | |
62 | struct tilcdc_drm_private *priv = ddev->dev_private; | |
8b917cbe | 63 | struct drm_encoder *encoder = NULL, *iter; |
ec9eab09 | 64 | |
8b917cbe XT |
65 | list_for_each_entry(iter, &ddev->mode_config.encoder_list, head) |
66 | if (iter->possible_crtcs & (1 << priv->crtc->index)) { | |
67 | encoder = iter; | |
ec9eab09 | 68 | break; |
8b917cbe | 69 | } |
ec9eab09 JS |
70 | |
71 | if (!encoder) { | |
72 | dev_err(ddev->dev, "%s: No suitable encoder found\n", __func__); | |
73 | return -ENODEV; | |
103cd8bc | 74 | } |
ec9eab09 | 75 | |
57d83965 JS |
76 | priv->external_connector = |
77 | tilcdc_encoder_find_connector(ddev, encoder); | |
ec9eab09 | 78 | |
57d83965 | 79 | if (!priv->external_connector) |
ec9eab09 JS |
80 | return -ENODEV; |
81 | ||
82 | /* Only tda998x is supported at the moment. */ | |
83 | tilcdc_crtc_set_simulate_vesa_sync(priv->crtc, true); | |
84 | tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_tda998x); | |
85 | ||
57d83965 | 86 | return 0; |
ec9eab09 JS |
87 | } |
88 | ||
ec9eab09 JS |
89 | static |
90 | int tilcdc_attach_bridge(struct drm_device *ddev, struct drm_bridge *bridge) | |
91 | { | |
92 | struct tilcdc_drm_private *priv = ddev->dev_private; | |
ec9eab09 JS |
93 | int ret; |
94 | ||
95 | priv->external_encoder->possible_crtcs = BIT(0); | |
ec9eab09 | 96 | |
a25b988f | 97 | ret = drm_bridge_attach(priv->external_encoder, bridge, NULL, 0); |
fb8d617f | 98 | if (ret) |
ec9eab09 | 99 | return ret; |
ec9eab09 JS |
100 | |
101 | tilcdc_crtc_set_panel_info(priv->crtc, &panel_info_default); | |
102 | ||
57d83965 JS |
103 | priv->external_connector = |
104 | tilcdc_encoder_find_connector(ddev, priv->external_encoder); | |
105 | if (!priv->external_connector) | |
ec9eab09 JS |
106 | return -ENODEV; |
107 | ||
57d83965 | 108 | return 0; |
ec9eab09 JS |
109 | } |
110 | ||
ec9eab09 JS |
111 | int tilcdc_attach_external_device(struct drm_device *ddev) |
112 | { | |
113 | struct tilcdc_drm_private *priv = ddev->dev_private; | |
ec9eab09 | 114 | struct drm_bridge *bridge; |
544f7377 | 115 | struct drm_panel *panel; |
ec9eab09 JS |
116 | int ret; |
117 | ||
544f7377 JS |
118 | ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0, |
119 | &panel, &bridge); | |
120 | if (ret == -ENODEV) | |
ec9eab09 | 121 | return 0; |
544f7377 JS |
122 | else if (ret) |
123 | return ret; | |
ec9eab09 JS |
124 | |
125 | priv->external_encoder = devm_kzalloc(ddev->dev, | |
126 | sizeof(*priv->external_encoder), | |
127 | GFP_KERNEL); | |
128 | if (!priv->external_encoder) | |
129 | return -ENOMEM; | |
130 | ||
d877d6ea TZ |
131 | ret = drm_simple_encoder_init(ddev, priv->external_encoder, |
132 | DRM_MODE_ENCODER_NONE); | |
ec9eab09 JS |
133 | if (ret) { |
134 | dev_err(ddev->dev, "drm_encoder_init() failed %d\n", ret); | |
135 | return ret; | |
136 | } | |
137 | ||
544f7377 | 138 | if (panel) { |
89958b7c LP |
139 | bridge = devm_drm_panel_bridge_add_typed(ddev->dev, panel, |
140 | DRM_MODE_CONNECTOR_DPI); | |
544f7377 JS |
141 | if (IS_ERR(bridge)) { |
142 | ret = PTR_ERR(bridge); | |
143 | goto err_encoder_cleanup; | |
144 | } | |
145 | } | |
146 | ||
ec9eab09 JS |
147 | ret = tilcdc_attach_bridge(ddev, bridge); |
148 | if (ret) | |
544f7377 JS |
149 | goto err_encoder_cleanup; |
150 | ||
151 | return 0; | |
ec9eab09 | 152 | |
544f7377 JS |
153 | err_encoder_cleanup: |
154 | drm_encoder_cleanup(priv->external_encoder); | |
ec9eab09 | 155 | return ret; |
103cd8bc JS |
156 | } |
157 | ||
158 | static int dev_match_of(struct device *dev, void *data) | |
159 | { | |
160 | return dev->of_node == data; | |
161 | } | |
162 | ||
163 | int tilcdc_get_external_components(struct device *dev, | |
164 | struct component_match **match) | |
165 | { | |
10a55a18 | 166 | struct device_node *node; |
103cd8bc | 167 | |
86418f90 | 168 | node = of_graph_get_remote_node(dev->of_node, 0, 0); |
ec9eab09 | 169 | |
86418f90 | 170 | if (!of_device_is_compatible(node, "nxp,tda998x")) { |
ec9eab09 | 171 | of_node_put(node); |
86418f90 | 172 | return 0; |
103cd8bc JS |
173 | } |
174 | ||
86418f90 RH |
175 | if (match) |
176 | drm_of_component_match_add(dev, match, dev_match_of, node); | |
177 | of_node_put(node); | |
178 | return 1; | |
103cd8bc | 179 | } |