struct dc_sink *dc_link_add_remote_sink(
struct dc_link *link,
const uint8_t *edid,
int len,
struct dc_sink_init_data *init_data)
{
struct dc_sink *dc_sink;
enum dc_edid_status edid_status;
if (len > MAX_EDID_BUFFER_SIZE) {
dm_error("Max EDID buffer size breached!\n");
return NULL;
}
if (!init_data) {
BREAK_TO_DEBUGGER();
return NULL;
}
if (!init_data->link) {
BREAK_TO_DEBUGGER();
return NULL;
}
dc_sink = dc_sink_create(init_data);
if (!dc_sink)
return NULL;
memmove(dc_sink->dc_edid.raw_edid, edid, len);
dc_sink->dc_edid.length = len;
if (!link_add_remote_sink_helper(
link,
dc_sink))
goto fail_add_sink;
edid_status = dm_helpers_parse_edid_caps(
link->ctx,
&dc_sink->dc_edid,
&dc_sink->edid_caps);
if (edid_status != EDID_OK)
goto fail;
return dc_sink;
fail:
dc_link_remove_remote_sink(link, dc_sink);
fail_add_sink:
dc_sink_release(dc_sink);
return NULL;
}
enum dc_edid_status dm_helpers_read_local_edid(
struct dc_context *ctx,
struct dc_link *link,
struct dc_sink *sink)
{
struct amdgpu_dm_connector *aconnector = link->priv;
struct i2c_adapter *ddc;
int retry = 3;
enum dc_edid_status edid_status;
struct edid *edid;
if (link->aux_mode)
ddc = &aconnector->dm_dp_aux.aux.ddc;
else
ddc = &aconnector->i2c->base;
/* some dongles read edid incorrectly the first time,
* do check sum and retry to make sure read correct edid.
*/
do {
edid = drm_get_edid(&aconnector->base, ddc);
if (!edid)
return EDID_NO_RESPONSE;
sink->dc_edid.length = EDID_LENGTH * (edid->extensions + 1);
memmove(sink->dc_edid.raw_edid, (uint8_t *)edid, sink->dc_edid.length);
/* We don't need the original edid anymore */
kfree(edid);
edid_status = dm_helpers_parse_edid_caps(
ctx,
&sink->dc_edid,
&sink->edid_caps);
} while (edid_status == EDID_BAD_CHECKSUM && --retry > 0);
if (edid_status != EDID_OK)
DRM_ERROR("EDID err: %d, on connector: %s",
edid_status,
aconnector->base.name);
return edid_status;
}
