From: Joseph Gravenor <[email protected]> [why] not turning off the mst hub before detection on reboot causes us to not be able to light up displays with mst hook
[how] on hw init, see if any displays are lit up. if so, turn them off Signed-off-by: Joseph Gravenor <[email protected]> Reviewed-by: Eric Yang <[email protected]> Acked-by: Bhawanpreet Lakha <[email protected]> --- .../amd/display/dc/dcn10/dcn10_hw_sequencer.c | 22 +++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index 0225f8d8bb82..42fcfee2c31b 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -48,8 +48,8 @@ #include "dc_link_dp.h" #include "dccg.h" #include "clk_mgr.h" - - +#include "link_hwss.h" +#include "dpcd_defs.h" #include "dsc.h" #define DC_LOGGER_INIT(logger) @@ -1322,6 +1322,24 @@ void dcn10_init_hw(struct dc *dc) if (hws->funcs.dsc_pg_control != NULL) hws->funcs.dsc_pg_control(hws, res_pool->dscs[i]->inst, false); + /* we want to turn off all dp displays before doing detection */ + if (dc->config.power_down_display_on_boot) { + uint8_t dpcd_power_state = '\0'; + enum dc_status status = DC_ERROR_UNEXPECTED; + + for (i = 0; i < dc->link_count; i++) { + if (dc->links[i]->connector_signal != SIGNAL_TYPE_DISPLAY_PORT) { + continue; + } + /* if any of the displays are lit up turn them off */ + status = core_link_read_dpcd(dc->links[i], DP_SET_POWER, + &dpcd_power_state, sizeof(dpcd_power_state)); + if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0) { + dp_receiver_power_ctrl(dc->links[i], false); + } + } + } + /* If taking control over from VBIOS, we may want to optimize our first * mode set, so we need to skip powering down pipes until we know which * pipes we want to use. -- 2.17.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
