diff options
| author | Leo (Hanghong) Ma <hanghong.ma@amd.com> | 2023-01-18 13:59:42 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2023-02-08 17:15:42 -0500 |
| commit | 71d7e8904d540dde6eaae4e3bac9cfd1894f4eaa (patch) | |
| tree | 2ebf52708b5bec301912c10366609b5e740f93a5 /drivers/gpu/drm/amd/display/dc/core/dc_link.c | |
| parent | af23aee9e9ba3cfe8693928323bf8e06296076d6 (diff) | |
drm/amd/display: Add HDMI manufacturer OUI and device id read
[Why && How]
Add support to read manufacturer OUI
and device id from HDMI SCDC.
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Leo (Hanghong) Ma <hanghong.ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index 1a2ab934b4bd..be9ff74e0cec 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -1044,6 +1044,20 @@ static void verify_link_capability(struct dc_link *link, struct dc_sink *sink, verify_link_capability_non_destructive(link); } +static void read_scdc_caps(struct ddc_service *ddc_service, struct dc_sink *sink) +{ + uint8_t slave_address = HDMI_SCDC_ADDRESS; + uint8_t offset = HDMI_SCDC_MANUFACTURER_OUI; + + link_query_ddc_data(ddc_service, slave_address, &offset, + sizeof(offset), sink->scdc_caps.manufacturer_OUI.byte, + sizeof(sink->scdc_caps.manufacturer_OUI.byte)); + + offset = HDMI_SCDC_DEVICE_ID; + + link_query_ddc_data(ddc_service, slave_address, &offset, + sizeof(offset), &(sink->scdc_caps.device_id.byte), sizeof(sink->scdc_caps.device_id.byte)); +} /** * detect_link_and_local_sink() - Detect if a sink is attached to a given link @@ -1287,6 +1301,9 @@ static bool detect_link_and_local_sink(struct dc_link *link, if (sink->edid_caps.panel_patch.skip_scdc_overwrite) link->ctx->dc->debug.hdmi20_disable = true; + if (dc_is_hdmi_signal(link->connector_signal)) + read_scdc_caps(link->ddc, link->local_sink); + if (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT && sink_caps.transaction_type == DDC_TRANSACTION_TYPE_I2C_OVER_AUX) { |