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1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4  * Author: James.Qian.Wang <james.qian.wang@arm.com>
5  *
6  */
7 #include "komeda_dev.h"
8 #include "komeda_kms.h"
9 
10 static int
komeda_wb_init_data_flow(struct komeda_layer * wb_layer,struct drm_connector_state * conn_st,struct komeda_crtc_state * kcrtc_st,struct komeda_data_flow_cfg * dflow)11 komeda_wb_init_data_flow(struct komeda_layer *wb_layer,
12 			 struct drm_connector_state *conn_st,
13 			 struct komeda_crtc_state *kcrtc_st,
14 			 struct komeda_data_flow_cfg *dflow)
15 {
16 	struct drm_framebuffer *fb = conn_st->writeback_job->fb;
17 
18 	memset(dflow, 0, sizeof(*dflow));
19 
20 	dflow->out_w = fb->width;
21 	dflow->out_h = fb->height;
22 
23 	/* the write back data comes from the compiz */
24 	pipeline_composition_size(kcrtc_st, &dflow->in_w, &dflow->in_h);
25 	dflow->input.component = &wb_layer->base.pipeline->compiz->base;
26 	/* compiz doesn't output alpha */
27 	dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
28 	dflow->rot = DRM_MODE_ROTATE_0;
29 
30 	komeda_complete_data_flow_cfg(wb_layer, dflow, fb);
31 
32 	return 0;
33 }
34 
35 static int
komeda_wb_encoder_atomic_check(struct drm_encoder * encoder,struct drm_crtc_state * crtc_st,struct drm_connector_state * conn_st)36 komeda_wb_encoder_atomic_check(struct drm_encoder *encoder,
37 			       struct drm_crtc_state *crtc_st,
38 			       struct drm_connector_state *conn_st)
39 {
40 	struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st);
41 	struct drm_writeback_job *writeback_job = conn_st->writeback_job;
42 	struct komeda_layer *wb_layer;
43 	struct komeda_data_flow_cfg dflow;
44 	int err;
45 
46 	if (!writeback_job)
47 		return 0;
48 
49 	if (!crtc_st->active) {
50 		DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n");
51 		return -EINVAL;
52 	}
53 
54 	wb_layer = to_kconn(to_wb_conn(conn_st->connector))->wb_layer;
55 
56 	/*
57 	 * No need for a full modested when the only connector changed is the
58 	 * writeback connector.
59 	 */
60 	if (crtc_st->connectors_changed &&
61 	    is_only_changed_connector(crtc_st, conn_st->connector))
62 		crtc_st->connectors_changed = false;
63 
64 	err = komeda_wb_init_data_flow(wb_layer, conn_st, kcrtc_st, &dflow);
65 	if (err)
66 		return err;
67 
68 	if (dflow.en_split)
69 		err = komeda_build_wb_split_data_flow(wb_layer,
70 				conn_st, kcrtc_st, &dflow);
71 	else
72 		err = komeda_build_wb_data_flow(wb_layer,
73 				conn_st, kcrtc_st, &dflow);
74 
75 	return err;
76 }
77 
78 static const struct drm_encoder_helper_funcs komeda_wb_encoder_helper_funcs = {
79 	.atomic_check = komeda_wb_encoder_atomic_check,
80 };
81 
82 static int
komeda_wb_connector_get_modes(struct drm_connector * connector)83 komeda_wb_connector_get_modes(struct drm_connector *connector)
84 {
85 	return 0;
86 }
87 
88 static enum drm_mode_status
komeda_wb_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)89 komeda_wb_connector_mode_valid(struct drm_connector *connector,
90 			       struct drm_display_mode *mode)
91 {
92 	struct drm_device *dev = connector->dev;
93 	struct drm_mode_config *mode_config = &dev->mode_config;
94 	int w = mode->hdisplay, h = mode->vdisplay;
95 
96 	if ((w < mode_config->min_width) || (w > mode_config->max_width))
97 		return MODE_BAD_HVALUE;
98 
99 	if ((h < mode_config->min_height) || (h > mode_config->max_height))
100 		return MODE_BAD_VVALUE;
101 
102 	return MODE_OK;
103 }
104 
105 static const struct drm_connector_helper_funcs komeda_wb_conn_helper_funcs = {
106 	.get_modes	= komeda_wb_connector_get_modes,
107 	.mode_valid	= komeda_wb_connector_mode_valid,
108 };
109 
110 static enum drm_connector_status
komeda_wb_connector_detect(struct drm_connector * connector,bool force)111 komeda_wb_connector_detect(struct drm_connector *connector, bool force)
112 {
113 	return connector_status_connected;
114 }
115 
116 static int
komeda_wb_connector_fill_modes(struct drm_connector * connector,uint32_t maxX,uint32_t maxY)117 komeda_wb_connector_fill_modes(struct drm_connector *connector,
118 			       uint32_t maxX, uint32_t maxY)
119 {
120 	return 0;
121 }
122 
komeda_wb_connector_destroy(struct drm_connector * connector)123 static void komeda_wb_connector_destroy(struct drm_connector *connector)
124 {
125 	drm_connector_cleanup(connector);
126 	kfree(to_kconn(to_wb_conn(connector)));
127 }
128 
129 static const struct drm_connector_funcs komeda_wb_connector_funcs = {
130 	.reset			= drm_atomic_helper_connector_reset,
131 	.detect			= komeda_wb_connector_detect,
132 	.fill_modes		= komeda_wb_connector_fill_modes,
133 	.destroy		= komeda_wb_connector_destroy,
134 	.atomic_duplicate_state	= drm_atomic_helper_connector_duplicate_state,
135 	.atomic_destroy_state	= drm_atomic_helper_connector_destroy_state,
136 };
137 
komeda_wb_connector_add(struct komeda_kms_dev * kms,struct komeda_crtc * kcrtc)138 static int komeda_wb_connector_add(struct komeda_kms_dev *kms,
139 				   struct komeda_crtc *kcrtc)
140 {
141 	struct komeda_dev *mdev = kms->base.dev_private;
142 	struct komeda_wb_connector *kwb_conn;
143 	struct drm_writeback_connector *wb_conn;
144 	struct drm_display_info *info;
145 	u32 *formats, n_formats = 0;
146 	int err;
147 
148 	if (!kcrtc->master->wb_layer)
149 		return 0;
150 
151 	kwb_conn = kzalloc(sizeof(*kwb_conn), GFP_KERNEL);
152 	if (!kwb_conn)
153 		return -ENOMEM;
154 
155 	kwb_conn->wb_layer = kcrtc->master->wb_layer;
156 
157 	wb_conn = &kwb_conn->base;
158 	wb_conn->encoder.possible_crtcs = BIT(drm_crtc_index(&kcrtc->base));
159 
160 	formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
161 					       kwb_conn->wb_layer->layer_type,
162 					       &n_formats);
163 
164 	err = drm_writeback_connector_init(&kms->base, wb_conn,
165 					   &komeda_wb_connector_funcs,
166 					   &komeda_wb_encoder_helper_funcs,
167 					   formats, n_formats);
168 	komeda_put_fourcc_list(formats);
169 	if (err) {
170 		kfree(kwb_conn);
171 		return err;
172 	}
173 
174 	drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs);
175 
176 	info = &kwb_conn->base.base.display_info;
177 	info->bpc = __fls(kcrtc->master->improc->supported_color_depths);
178 	info->color_formats = kcrtc->master->improc->supported_color_formats;
179 
180 	kcrtc->wb_conn = kwb_conn;
181 
182 	return 0;
183 }
184 
komeda_kms_add_wb_connectors(struct komeda_kms_dev * kms,struct komeda_dev * mdev)185 int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms,
186 				 struct komeda_dev *mdev)
187 {
188 	int i, err;
189 
190 	for (i = 0; i < kms->n_crtcs; i++) {
191 		err = komeda_wb_connector_add(kms, &kms->crtcs[i]);
192 		if (err)
193 			return err;
194 	}
195 
196 	return 0;
197 }
198