1
2
3
4
5
6#define PREFIX_STR "[drm_dp_mst_helper]"
7
8#include <linux/random.h>
9
10#include <drm/drm_dp_mst_helper.h>
11#include <drm/drm_print.h>
12
13#include "../drm_dp_mst_topology_internal.h"
14#include "test-drm_modeset_common.h"
15
16int igt_dp_mst_calc_pbn_mode(void *ignored)
17{
18 int pbn, i;
19 const struct {
20 int rate;
21 int bpp;
22 int expected;
23 bool dsc;
24 } test_params[] = {
25 { 154000, 30, 689, false },
26 { 234000, 30, 1047, false },
27 { 297000, 24, 1063, false },
28 { 332880, 24, 50, true },
29 { 324540, 24, 49, true },
30 };
31
32 for (i = 0; i < ARRAY_SIZE(test_params); i++) {
33 pbn = drm_dp_calc_pbn_mode(test_params[i].rate,
34 test_params[i].bpp,
35 test_params[i].dsc);
36 FAIL(pbn != test_params[i].expected,
37 "Expected PBN %d for clock %d bpp %d, got %d\n",
38 test_params[i].expected, test_params[i].rate,
39 test_params[i].bpp, pbn);
40 }
41
42 return 0;
43}
44
45static bool
46sideband_msg_req_equal(const struct drm_dp_sideband_msg_req_body *in,
47 const struct drm_dp_sideband_msg_req_body *out)
48{
49 const struct drm_dp_remote_i2c_read_tx *txin, *txout;
50 int i;
51
52 if (in->req_type != out->req_type)
53 return false;
54
55 switch (in->req_type) {
56
57
58
59
60
61 case DP_REMOTE_I2C_READ:
62#define IN in->u.i2c_read
63#define OUT out->u.i2c_read
64 if (IN.num_bytes_read != OUT.num_bytes_read ||
65 IN.num_transactions != OUT.num_transactions ||
66 IN.port_number != OUT.port_number ||
67 IN.read_i2c_device_id != OUT.read_i2c_device_id)
68 return false;
69
70 for (i = 0; i < IN.num_transactions; i++) {
71 txin = &IN.transactions[i];
72 txout = &OUT.transactions[i];
73
74 if (txin->i2c_dev_id != txout->i2c_dev_id ||
75 txin->no_stop_bit != txout->no_stop_bit ||
76 txin->num_bytes != txout->num_bytes ||
77 txin->i2c_transaction_delay !=
78 txout->i2c_transaction_delay)
79 return false;
80
81 if (memcmp(txin->bytes, txout->bytes,
82 txin->num_bytes) != 0)
83 return false;
84 }
85 break;
86#undef IN
87#undef OUT
88
89 case DP_REMOTE_DPCD_WRITE:
90#define IN in->u.dpcd_write
91#define OUT out->u.dpcd_write
92 if (IN.dpcd_address != OUT.dpcd_address ||
93 IN.num_bytes != OUT.num_bytes ||
94 IN.port_number != OUT.port_number)
95 return false;
96
97 return memcmp(IN.bytes, OUT.bytes, IN.num_bytes) == 0;
98#undef IN
99#undef OUT
100
101 case DP_REMOTE_I2C_WRITE:
102#define IN in->u.i2c_write
103#define OUT out->u.i2c_write
104 if (IN.port_number != OUT.port_number ||
105 IN.write_i2c_device_id != OUT.write_i2c_device_id ||
106 IN.num_bytes != OUT.num_bytes)
107 return false;
108
109 return memcmp(IN.bytes, OUT.bytes, IN.num_bytes) == 0;
110#undef IN
111#undef OUT
112
113 default:
114 return memcmp(in, out, sizeof(*in)) == 0;
115 }
116
117 return true;
118}
119
120static bool
121sideband_msg_req_encode_decode(struct drm_dp_sideband_msg_req_body *in)
122{
123 struct drm_dp_sideband_msg_req_body out = {0};
124 struct drm_printer p = drm_err_printer(PREFIX_STR);
125 struct drm_dp_sideband_msg_tx txmsg;
126 int i, ret;
127
128 drm_dp_encode_sideband_req(in, &txmsg);
129 ret = drm_dp_decode_sideband_req(&txmsg, &out);
130 if (ret < 0) {
131 drm_printf(&p, "Failed to decode sideband request: %d\n",
132 ret);
133 return false;
134 }
135
136 if (!sideband_msg_req_equal(in, &out)) {
137 drm_printf(&p, "Encode/decode failed, expected:\n");
138 drm_dp_dump_sideband_msg_req_body(in, 1, &p);
139 drm_printf(&p, "Got:\n");
140 drm_dp_dump_sideband_msg_req_body(&out, 1, &p);
141 return false;
142 }
143
144 switch (in->req_type) {
145 case DP_REMOTE_DPCD_WRITE:
146 kfree(out.u.dpcd_write.bytes);
147 break;
148 case DP_REMOTE_I2C_READ:
149 for (i = 0; i < out.u.i2c_read.num_transactions; i++)
150 kfree(out.u.i2c_read.transactions[i].bytes);
151 break;
152 case DP_REMOTE_I2C_WRITE:
153 kfree(out.u.i2c_write.bytes);
154 break;
155 }
156
157
158 memset(&in->u, 0, sizeof(in->u));
159
160 return true;
161}
162
163int igt_dp_mst_sideband_msg_req_decode(void *unused)
164{
165 struct drm_dp_sideband_msg_req_body in = { 0 };
166 u8 data[] = { 0xff, 0x0, 0xdd };
167 int i;
168
169#define DO_TEST() FAIL_ON(!sideband_msg_req_encode_decode(&in))
170
171 in.req_type = DP_ENUM_PATH_RESOURCES;
172 in.u.port_num.port_number = 5;
173 DO_TEST();
174
175 in.req_type = DP_POWER_UP_PHY;
176 in.u.port_num.port_number = 5;
177 DO_TEST();
178
179 in.req_type = DP_POWER_DOWN_PHY;
180 in.u.port_num.port_number = 5;
181 DO_TEST();
182
183 in.req_type = DP_ALLOCATE_PAYLOAD;
184 in.u.allocate_payload.number_sdp_streams = 3;
185 for (i = 0; i < in.u.allocate_payload.number_sdp_streams; i++)
186 in.u.allocate_payload.sdp_stream_sink[i] = i + 1;
187 DO_TEST();
188 in.u.allocate_payload.port_number = 0xf;
189 DO_TEST();
190 in.u.allocate_payload.vcpi = 0x7f;
191 DO_TEST();
192 in.u.allocate_payload.pbn = U16_MAX;
193 DO_TEST();
194
195 in.req_type = DP_QUERY_PAYLOAD;
196 in.u.query_payload.port_number = 0xf;
197 DO_TEST();
198 in.u.query_payload.vcpi = 0x7f;
199 DO_TEST();
200
201 in.req_type = DP_REMOTE_DPCD_READ;
202 in.u.dpcd_read.port_number = 0xf;
203 DO_TEST();
204 in.u.dpcd_read.dpcd_address = 0xfedcb;
205 DO_TEST();
206 in.u.dpcd_read.num_bytes = U8_MAX;
207 DO_TEST();
208
209 in.req_type = DP_REMOTE_DPCD_WRITE;
210 in.u.dpcd_write.port_number = 0xf;
211 DO_TEST();
212 in.u.dpcd_write.dpcd_address = 0xfedcb;
213 DO_TEST();
214 in.u.dpcd_write.num_bytes = ARRAY_SIZE(data);
215 in.u.dpcd_write.bytes = data;
216 DO_TEST();
217
218 in.req_type = DP_REMOTE_I2C_READ;
219 in.u.i2c_read.port_number = 0xf;
220 DO_TEST();
221 in.u.i2c_read.read_i2c_device_id = 0x7f;
222 DO_TEST();
223 in.u.i2c_read.num_transactions = 3;
224 in.u.i2c_read.num_bytes_read = ARRAY_SIZE(data) * 3;
225 for (i = 0; i < in.u.i2c_read.num_transactions; i++) {
226 in.u.i2c_read.transactions[i].bytes = data;
227 in.u.i2c_read.transactions[i].num_bytes = ARRAY_SIZE(data);
228 in.u.i2c_read.transactions[i].i2c_dev_id = 0x7f & ~i;
229 in.u.i2c_read.transactions[i].i2c_transaction_delay = 0xf & ~i;
230 }
231 DO_TEST();
232
233 in.req_type = DP_REMOTE_I2C_WRITE;
234 in.u.i2c_write.port_number = 0xf;
235 DO_TEST();
236 in.u.i2c_write.write_i2c_device_id = 0x7f;
237 DO_TEST();
238 in.u.i2c_write.num_bytes = ARRAY_SIZE(data);
239 in.u.i2c_write.bytes = data;
240 DO_TEST();
241
242 in.req_type = DP_QUERY_STREAM_ENC_STATUS;
243 in.u.enc_status.stream_id = 1;
244 DO_TEST();
245 get_random_bytes(in.u.enc_status.client_id,
246 sizeof(in.u.enc_status.client_id));
247 DO_TEST();
248 in.u.enc_status.stream_event = 3;
249 DO_TEST();
250 in.u.enc_status.valid_stream_event = 0;
251 DO_TEST();
252 in.u.enc_status.stream_behavior = 3;
253 DO_TEST();
254 in.u.enc_status.valid_stream_behavior = 1;
255 DO_TEST();
256
257#undef DO_TEST
258 return 0;
259}
260
