1 // SPDX-License-Identifier: GPL-2.0-or-later
2 // Copyright (c) 2024 Hisilicon Limited.
3
4 #include <linux/io.h>
5
6 #include <drm/drm_probe_helper.h>
7 #include <drm/drm_simple_kms_helper.h>
8 #include <drm/drm_atomic_helper.h>
9 #include <drm/drm_modes.h>
10 #include <drm/drm_drv.h>
11 #include <drm/drm_edid.h>
12
13 #include "hibmc_drm_drv.h"
14 #include "dp/dp_hw.h"
15
hibmc_dp_connector_get_modes(struct drm_connector * connector)16 static int hibmc_dp_connector_get_modes(struct drm_connector *connector)
17 {
18 int count;
19
20 count = drm_add_modes_noedid(connector, connector->dev->mode_config.max_width,
21 connector->dev->mode_config.max_height);
22 drm_set_preferred_mode(connector, 1024, 768); // temporary implementation
23
24 return count;
25 }
26
27 static const struct drm_connector_helper_funcs hibmc_dp_conn_helper_funcs = {
28 .get_modes = hibmc_dp_connector_get_modes,
29 };
30
31 static const struct drm_connector_funcs hibmc_dp_conn_funcs = {
32 .reset = drm_atomic_helper_connector_reset,
33 .fill_modes = drm_helper_probe_single_connector_modes,
34 .destroy = drm_connector_cleanup,
35 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
36 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
37 };
38
hibmc_dp_prepare(struct hibmc_dp * dp,struct drm_display_mode * mode)39 static inline int hibmc_dp_prepare(struct hibmc_dp *dp, struct drm_display_mode *mode)
40 {
41 int ret;
42
43 hibmc_dp_display_en(dp, false);
44
45 ret = hibmc_dp_mode_set(dp, mode);
46 if (ret)
47 drm_err(dp->drm_dev, "hibmc dp mode set failed: %d\n", ret);
48
49 return ret;
50 }
51
hibmc_dp_encoder_enable(struct drm_encoder * drm_encoder,struct drm_atomic_state * state)52 static void hibmc_dp_encoder_enable(struct drm_encoder *drm_encoder,
53 struct drm_atomic_state *state)
54 {
55 struct hibmc_dp *dp = container_of(drm_encoder, struct hibmc_dp, encoder);
56 struct drm_display_mode *mode = &drm_encoder->crtc->state->mode;
57
58 if (hibmc_dp_prepare(dp, mode))
59 return;
60
61 hibmc_dp_display_en(dp, true);
62 }
63
hibmc_dp_encoder_disable(struct drm_encoder * drm_encoder,struct drm_atomic_state * state)64 static void hibmc_dp_encoder_disable(struct drm_encoder *drm_encoder,
65 struct drm_atomic_state *state)
66 {
67 struct hibmc_dp *dp = container_of(drm_encoder, struct hibmc_dp, encoder);
68
69 hibmc_dp_display_en(dp, false);
70 }
71
72 static const struct drm_encoder_helper_funcs hibmc_dp_encoder_helper_funcs = {
73 .atomic_enable = hibmc_dp_encoder_enable,
74 .atomic_disable = hibmc_dp_encoder_disable,
75 };
76
hibmc_dp_init(struct hibmc_drm_private * priv)77 int hibmc_dp_init(struct hibmc_drm_private *priv)
78 {
79 struct drm_device *dev = &priv->dev;
80 struct drm_crtc *crtc = &priv->crtc;
81 struct hibmc_dp *dp = &priv->dp;
82 struct drm_connector *connector = &dp->connector;
83 struct drm_encoder *encoder = &dp->encoder;
84 int ret;
85
86 dp->mmio = priv->mmio;
87 dp->drm_dev = dev;
88
89 ret = hibmc_dp_hw_init(&priv->dp);
90 if (ret) {
91 drm_err(dev, "hibmc dp hw init failed: %d\n", ret);
92 return ret;
93 }
94
95 hibmc_dp_display_en(&priv->dp, false);
96
97 encoder->possible_crtcs = drm_crtc_mask(crtc);
98 ret = drmm_encoder_init(dev, encoder, NULL, DRM_MODE_ENCODER_TMDS, NULL);
99 if (ret) {
100 drm_err(dev, "init dp encoder failed: %d\n", ret);
101 return ret;
102 }
103
104 drm_encoder_helper_add(encoder, &hibmc_dp_encoder_helper_funcs);
105
106 ret = drm_connector_init(dev, connector, &hibmc_dp_conn_funcs,
107 DRM_MODE_CONNECTOR_DisplayPort);
108 if (ret) {
109 drm_err(dev, "init dp connector failed: %d\n", ret);
110 return ret;
111 }
112
113 drm_connector_helper_add(connector, &hibmc_dp_conn_helper_funcs);
114
115 drm_connector_attach_encoder(connector, encoder);
116
117 return 0;
118 }
119