tree: git://people.freedesktop.org/~agd5f/linux.git amd-staging-drm-next
head: 486e4f30e2a3b7bdd2caa48d09b905a34f2f99cb
commit: 6e0ef9d85b99baeeea4b9c4a9777809cb0c6040a [82/132] drm/amd/display:
Write TEST_EDID_CHECKSUM_WRITE for EDID tests
reproduce:
# apt-get install sparse
git checkout 6e0ef9d85b99baeeea4b9c4a9777809cb0c6040a
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_helpers.c:501:52:
>> sparse: missing braces around initializer
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_helpers.c:502:54:
sparse: missing braces around initializer
vim +501 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_helpers.c
456
457 enum dc_edid_status dm_helpers_read_local_edid(
458 struct dc_context *ctx,
459 struct dc_link *link,
460 struct dc_sink *sink)
461 {
462 struct amdgpu_dm_connector *aconnector = link->priv;
463 struct i2c_adapter *ddc;
464 int retry = 3;
465 enum dc_edid_status edid_status;
466 struct edid *edid;
467
468 if (link->aux_mode)
469 ddc = &aconnector->dm_dp_aux.aux.ddc;
470 else
471 ddc = &aconnector->i2c->base;
472
473 /* some dongles read edid incorrectly the first time,
474 * do check sum and retry to make sure read correct edid.
475 */
476 do {
477
478 edid = drm_get_edid(&aconnector->base, ddc);
479
480 if (!edid)
481 return EDID_NO_RESPONSE;
482
483 sink->dc_edid.length = EDID_LENGTH * (edid->extensions
+ 1);
484 memmove(sink->dc_edid.raw_edid, (uint8_t *)edid,
sink->dc_edid.length);
485
486 /* We don't need the original edid anymore */
487 kfree(edid);
488
489 edid_status = dm_helpers_parse_edid_caps(
490 ctx,
491 &sink->dc_edid,
492 &sink->edid_caps);
493
494 } while (edid_status == EDID_BAD_CHECKSUM && --retry > 0);
495
496 if (edid_status != EDID_OK)
497 DRM_ERROR("EDID err: %d, on connector: %s",
498 edid_status,
499 aconnector->base.name);
500 if (link->aux_mode) {
> 501 union test_request test_request = {0};
502 union test_response test_response = {0};
503
504 dm_helpers_dp_read_dpcd(ctx,
505 link,
506 DP_TEST_REQUEST,
507 &test_request.raw,
508 sizeof(union test_request));
509
510 if (!test_request.bits.EDID_READ)
511 return edid_status;
512
513 test_response.bits.EDID_CHECKSUM_WRITE = 1;
514
515 dm_helpers_dp_write_dpcd(ctx,
516 link,
517 DP_TEST_EDID_CHECKSUM,
518
&sink->dc_edid.raw_edid[sink->dc_edid.length-1],
519 1);
520
521 dm_helpers_dp_write_dpcd(ctx,
522 link,
523 DP_TEST_RESPONSE,
524 &test_response.raw,
525 sizeof(test_response));
526
527 }
528
529 return edid_status;
530 }
531
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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