1 // SPDX-License-Identifier: GPL-2.0-only
3 * Test cases for for the DRM DP MST helpers
6 #define PREFIX_STR "[drm_dp_mst_helper]"
8 #include <linux/random.h>
10 #include <drm/display/drm_dp_mst_helper.h>
11 #include <drm/drm_print.h>
13 #include "../display/drm_dp_mst_topology_internal.h"
14 #include "test-drm_modeset_common.h"
16 int igt_dp_mst_calc_pbn_mode(void *ignored)
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 },
32 for (i = 0; i < ARRAY_SIZE(test_params); i++) {
33 pbn = drm_dp_calc_pbn_mode(test_params[i].rate,
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);
46 sideband_msg_req_equal(const struct drm_dp_sideband_msg_req_body *in,
47 const struct drm_dp_sideband_msg_req_body *out)
49 const struct drm_dp_remote_i2c_read_tx *txin, *txout;
52 if (in->req_type != out->req_type)
55 switch (in->req_type) {
57 * Compare struct members manually for request types which can't be
58 * compared simply using memcmp(). This is because said request types
59 * contain pointers to other allocated structs
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)
70 for (i = 0; i < IN.num_transactions; i++) {
71 txin = &IN.transactions[i];
72 txout = &OUT.transactions[i];
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)
81 if (memcmp(txin->bytes, txout->bytes,
82 txin->num_bytes) != 0)
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)
97 return memcmp(IN.bytes, OUT.bytes, IN.num_bytes) == 0;
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)
109 return memcmp(IN.bytes, OUT.bytes, IN.num_bytes) == 0;
114 return memcmp(in, out, sizeof(*in)) == 0;
121 sideband_msg_req_encode_decode(struct drm_dp_sideband_msg_req_body *in)
123 struct drm_dp_sideband_msg_req_body *out;
124 struct drm_printer p = drm_err_printer(PREFIX_STR);
125 struct drm_dp_sideband_msg_tx *txmsg;
129 out = kzalloc(sizeof(*out), GFP_KERNEL);
133 txmsg = kzalloc(sizeof(*txmsg), GFP_KERNEL);
139 drm_dp_encode_sideband_req(in, txmsg);
140 ret = drm_dp_decode_sideband_req(txmsg, out);
142 drm_printf(&p, "Failed to decode sideband request: %d\n",
148 if (!sideband_msg_req_equal(in, out)) {
149 drm_printf(&p, "Encode/decode failed, expected:\n");
150 drm_dp_dump_sideband_msg_req_body(in, 1, &p);
151 drm_printf(&p, "Got:\n");
152 drm_dp_dump_sideband_msg_req_body(out, 1, &p);
157 switch (in->req_type) {
158 case DP_REMOTE_DPCD_WRITE:
159 kfree(out->u.dpcd_write.bytes);
161 case DP_REMOTE_I2C_READ:
162 for (i = 0; i < out->u.i2c_read.num_transactions; i++)
163 kfree(out->u.i2c_read.transactions[i].bytes);
165 case DP_REMOTE_I2C_WRITE:
166 kfree(out->u.i2c_write.bytes);
170 /* Clear everything but the req_type for the input */
171 memset(&in->u, 0, sizeof(in->u));
179 int igt_dp_mst_sideband_msg_req_decode(void *unused)
181 struct drm_dp_sideband_msg_req_body in = { 0 };
182 u8 data[] = { 0xff, 0x0, 0xdd };
185 #define DO_TEST() FAIL_ON(!sideband_msg_req_encode_decode(&in))
187 in.req_type = DP_ENUM_PATH_RESOURCES;
188 in.u.port_num.port_number = 5;
191 in.req_type = DP_POWER_UP_PHY;
192 in.u.port_num.port_number = 5;
195 in.req_type = DP_POWER_DOWN_PHY;
196 in.u.port_num.port_number = 5;
199 in.req_type = DP_ALLOCATE_PAYLOAD;
200 in.u.allocate_payload.number_sdp_streams = 3;
201 for (i = 0; i < in.u.allocate_payload.number_sdp_streams; i++)
202 in.u.allocate_payload.sdp_stream_sink[i] = i + 1;
204 in.u.allocate_payload.port_number = 0xf;
206 in.u.allocate_payload.vcpi = 0x7f;
208 in.u.allocate_payload.pbn = U16_MAX;
211 in.req_type = DP_QUERY_PAYLOAD;
212 in.u.query_payload.port_number = 0xf;
214 in.u.query_payload.vcpi = 0x7f;
217 in.req_type = DP_REMOTE_DPCD_READ;
218 in.u.dpcd_read.port_number = 0xf;
220 in.u.dpcd_read.dpcd_address = 0xfedcb;
222 in.u.dpcd_read.num_bytes = U8_MAX;
225 in.req_type = DP_REMOTE_DPCD_WRITE;
226 in.u.dpcd_write.port_number = 0xf;
228 in.u.dpcd_write.dpcd_address = 0xfedcb;
230 in.u.dpcd_write.num_bytes = ARRAY_SIZE(data);
231 in.u.dpcd_write.bytes = data;
234 in.req_type = DP_REMOTE_I2C_READ;
235 in.u.i2c_read.port_number = 0xf;
237 in.u.i2c_read.read_i2c_device_id = 0x7f;
239 in.u.i2c_read.num_transactions = 3;
240 in.u.i2c_read.num_bytes_read = ARRAY_SIZE(data) * 3;
241 for (i = 0; i < in.u.i2c_read.num_transactions; i++) {
242 in.u.i2c_read.transactions[i].bytes = data;
243 in.u.i2c_read.transactions[i].num_bytes = ARRAY_SIZE(data);
244 in.u.i2c_read.transactions[i].i2c_dev_id = 0x7f & ~i;
245 in.u.i2c_read.transactions[i].i2c_transaction_delay = 0xf & ~i;
249 in.req_type = DP_REMOTE_I2C_WRITE;
250 in.u.i2c_write.port_number = 0xf;
252 in.u.i2c_write.write_i2c_device_id = 0x7f;
254 in.u.i2c_write.num_bytes = ARRAY_SIZE(data);
255 in.u.i2c_write.bytes = data;
258 in.req_type = DP_QUERY_STREAM_ENC_STATUS;
259 in.u.enc_status.stream_id = 1;
261 get_random_bytes(in.u.enc_status.client_id,
262 sizeof(in.u.enc_status.client_id));
264 in.u.enc_status.stream_event = 3;
266 in.u.enc_status.valid_stream_event = 0;
268 in.u.enc_status.stream_behavior = 3;
270 in.u.enc_status.valid_stream_behavior = 1;