From: David Galiffi <[email protected]> [WHY]
During detection: function: get_active_converter_info populates link->dpcd_caps.dongle_caps only when dpcd_rev >= DPCD_REV_11 and DWN_STRM_PORTX_TYPE is DOWN_STREAM_DETAILED_HDMI or DOWN_STREAM_DETAILED_DP_PLUS_PLUS. Otherwise, it is not cleared, and stale information remains. During mode validation: function: dp_active_dongle_validate_timing reads link->dpcd_caps.dongle_caps->dongle_type to determine the maximum pixel clock to support. This information is now stale and no longer valid. [HOW] dp_active_dongle_validate_timing should be using link->dpcd_caps->dongle_type instead. Change-Id: Ie93769353ccf209b4af0b87c1a143422c88df92d Signed-off-by: David Galiffi <[email protected]> Reviewed-by: Jun Lei <[email protected]> Acked-by: Bhawanpreet Lakha <[email protected]> --- drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) 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 f41f1706c05f..149b15aeffb4 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -2256,7 +2256,7 @@ static bool dp_active_dongle_validate_timing( break; } - if (dongle_caps->dongle_type != DISPLAY_DONGLE_DP_HDMI_CONVERTER || + if (dpcd_caps->dongle_type != DISPLAY_DONGLE_DP_HDMI_CONVERTER || dongle_caps->extendedCapValid == false) return true; diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index aae204141c60..0f59b68aa4c2 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -2575,6 +2575,7 @@ static void get_active_converter_info( uint8_t data, struct dc_link *link) { union dp_downstream_port_present ds_port = { .byte = data }; + memset(&link->dpcd_caps.dongle_caps, 0, sizeof(link->dpcd_caps.dongle_caps)); /* decode converter info*/ if (!ds_port.fields.PORT_PRESENT) { -- 2.17.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
